A gas path filtration device for an inductively coupled plasma mass spectrometer

Abstract

This application relates to the field of mass spectrometry technology, and in particular to a gas path filtration device for an inductively coupled plasma mass spectrometer, comprising a filter housing with a circular filter chamber on one side. This application, through the design of a drive mechanism, effectively improves maintenance efficiency. When maintenance is required, the first motor of the transverse drive group is activated, driving the transverse lead screw to rotate, causing the transverse slider to move linearly along the transverse rail. This allows the particulate matter filtration mechanism to be extracted as a whole via the transverse connecting arm. During this process, the transverse connecting arm, in conjunction with a rack and pinion, drives the gear to rotate, causing the vertical lead screw to move the longitudinal slider. Simultaneously, the longitudinal connecting arm extracts the adsorption and purification mechanism. Furthermore, the filter screen uses a hexagonal frame and hexagonal blocks magnetically connected, allowing for quick disassembly without tools. This entire linkage mechanism eliminates the tedious traditional method of disassembling filter elements one by one, enabling the disassembly of multiple components in a single operation, significantly shortening maintenance time and reducing maintenance costs.

Description

Technical Field

[0001] This application relates to the field of mass spectrometry technology, and in particular to a gas path filtration device for an inductively coupled plasma mass spectrometer. Background Technology

[0002] Currently, in the operation of inductively coupled plasma mass spectrometry (ICP-MS), the gas path filtration device plays a crucial role. ICP-MS uses high-frequency plasma to ionize the sample into ions at high temperature. The generated ions are focused by an ion optical lens and then enter a quadrupole mass spectrometer for separation according to the charge-to-mass ratio, achieving semi-quantitative or quantitative analysis. Argon is a key gas for the operation of ICP-MS, and its purity directly affects the analytical performance of the instrument and the accuracy of the detection results. Therefore, the gas path filtration device must effectively remove impurities and particulate matter from the argon to provide the instrument with high-purity gas. Existing gas path filtration devices for inductively coupled plasma mass spectrometers, such as the device disclosed in Chinese Patent No. CN221580062U, include a filter box and a first filter chamber. By setting a filter cavity inside the filter box and equipping it with an inlet pipe, an exhaust pipe, and a pull-out groove communicating with the filter cavity, and arranging filter screens, activated carbon filter elements, and desiccant filter elements inside, the device can filter impurities and particulate matter in argon gas, and can remove harmful components in argon gas to a certain extent, thus ensuring the effectiveness of the instrument. However, existing technologies still have significant drawbacks in practical applications. First, disassembling and repairing the internal filter, activated carbon filter, and desiccant filter requires individual removal, making the process cumbersome and hindering rapid disassembly and installation, thus increasing maintenance time and labor costs. Second, the activated carbon filter lacks a large-particle filtration structure on its outer surface. Large particles in the gas are directly intercepted and filtered by the activated carbon filter, but they adhere to its outer surface in large quantities. As impurities accumulate, the outer surface of the activated carbon filter is easily clogged, significantly reducing filtration efficiency. This forces the activated carbon filter to be replaced before it reaches adsorption saturation, resulting in resource waste and frequent disruptions to the normal operation of the instrument. Therefore, optimization and improvement of existing gas filtration devices are urgently needed. Summary of the Invention

[0003] To improve the ease of maintenance and repair during the application of existing technologies and their overall filtration efficiency, this application provides a gas path filtration device for an inductively coupled plasma mass spectrometer.

[0004] This application provides a gas path filtration device for an inductively coupled plasma mass spectrometer, which adopts the following technical solution: It includes a filter box, a circular filter chamber on one side of the filter box, and a square filter chamber on the side of the filter box away from the circular filter chamber. A drive mechanism is fixedly connected to the center of the front of the filter box. A particulate matter filtration mechanism is provided inside the drive mechanism near the circular filter chamber, and the particulate matter filtration mechanism is inserted inside the circular filter chamber. An adsorption and purification mechanism is fixedly installed on the side of the drive mechanism near the square filter chamber, and the adsorption and purification mechanism is inserted inside the square filter chamber. An exhaust fan is fixedly installed on the side of the filter box near the square filter chamber. The drive mechanism includes a horizontal drive group, a linkage component, and a vertical drive group. The horizontal drive group is fixedly installed in the center of the front of the filter box. The vertical drive group is fixedly installed on the top of the horizontal drive group near the circular filter chamber. The particulate matter filtration mechanism is fixedly installed at the moving end of the horizontal drive group. The adsorption and purification mechanism is fixedly installed at the moving end of the vertical drive group. The horizontal drive group and the vertical drive group are connected by a linkage component.

[0005] Optionally, a mounting plate is fixedly installed at the bottom of the filter box, and mounting holes are provided at the four corners of the mounting plate, and the mounting holes are countersunk holes.

[0006] Optionally, the transverse drive assembly includes a transverse rail frame, which is fixedly installed in the middle of the front of the filter box. A first motor is fixedly installed at one end of the transverse rail frame near the exhaust duct. A transverse lead screw is fixedly installed through the transverse rail frame at the output end of the first motor. A transverse sliding block is threaded onto the outer surface of the transverse lead screw. A transverse connecting arm is fixedly installed on the outer side of the transverse sliding block. The outer end of the transverse connecting arm is connected to the particulate matter filtration mechanism. The linkage assembly is installed on the top of the transverse rail frame.

[0007] Optionally, the longitudinal drive assembly includes a vertical rail frame, which is fixedly installed on the top of the transverse rail frame near the circular filter chamber. A vertical lead screw is rotatably connected inside the vertical rail frame, and a longitudinal sliding block is threadedly connected to the outer surface of the vertical lead screw. A longitudinal connecting arm is fixedly installed on the back of the longitudinal sliding block, and the outer end of the longitudinal connecting arm is connected to the adsorption and purification mechanism. The cross-sectional shape of the internal cavity of the transverse rail frame and the internal cavity of the vertical rail frame are both set to a convex shape. The cross-sectional shape of the transverse sliding block and the longitudinal cross-sectional shape of the longitudinal sliding block are also both set to a convex shape.

[0008] Optionally, the linkage component includes a connecting frame and a gear. The gear is rotatably connected to the bottom of the vertical rail frame. The connecting frame is fixedly connected to the outside of the horizontal connecting arm. A rack is fixedly connected to the top of the connecting frame. The rack and the gear are meshed together. The top of the gear is fixedly connected to the bottom of the vertical lead screw.

[0009] Optionally, the particulate matter filtration mechanism includes an air inlet hopper, which is fixedly installed at the outer end of the transverse connecting arm. A cross is fixedly installed inside the air inlet hopper, a connecting component is fixedly installed on the inner side of the cross, and a filter screen is fixedly installed at the end of the connecting component.

[0010] Optionally, the connecting assembly includes a second motor, which is fixedly installed inside the cross. A connecting shaft is fixedly installed at the output end of the second motor, and a hexagonal block is fixedly installed at the end of the connecting shaft. A hexagonal frame is fitted around the outer side of the hexagonal block, and a turntable is fixedly installed on the side of the hexagonal frame away from the hexagonal block. The filter screen is rotatably connected to the outside of the connecting assembly. The filter screen is inserted into the interior of the circular filter chamber. A sealing ring is fixedly installed on the outer side of the filter screen, and the outer side of the sealing ring is in close contact with the inner wall of the circular filter chamber. Cleaning plates are fixedly connected to the outer side of the turntable in a ring at equal intervals. A cleaning scraper is fixedly connected to the side of the cleaning plate near the filter screen, and a cleaning brush is fixedly connected to the other side of the cleaning plate near the filter screen. The inner sides of the cleaning brush and the cleaning scraper are in close contact with the outer surface of the filter screen.

[0011] Optionally, a strong magnetic block is fixedly connected to the inner side of the hexagonal block, and the strong magnetic block and the hexagonal frame are magnetically connected. The overall shape of the filter screen is conical, and a collection sleeve is fixedly connected to the outer side of the filter screen. An air guide hopper is fixedly installed on the side of the collection sleeve near the circular filter chamber, and the end of the collection sleeve near the air guide hopper is also funnel-shaped.

[0012] Optionally, an air inlet hose is fixedly connected to the outer end of the air inlet hopper, and a connecting flange is fixedly connected to the outer end of both the air inlet hose and the outer end of the exhaust hopper. A dust baffle is bolted to the end of the second motor near the air inlet hopper, and the dust baffle is generally conical in shape.

[0013] Optionally, the adsorption purification mechanism includes a square groove, which is opened on the top of the filter box near the square filter chamber. The bottom of the square groove is connected to the inside of the square filter chamber. A filter frame is slidably connected inside the square groove. An activated carbon filter element and a desiccant filter element are slidably connected to both sides of the inside of the filter frame. A square sealing gasket is fixedly connected to the outside of both the activated carbon filter element and the desiccant filter element. The outside of the square sealing gasket is fitted to the inner wall of the square filter chamber. A sealing cover is fixedly installed on the top of the filter frame. One side of the sealing cover is fixedly connected to the outer end of the longitudinal connecting arm.

[0014] In summary, this application includes the following beneficial technical effects: During the application of this device, the design of its drive mechanism can effectively improve maintenance efficiency. When maintenance is required, the first motor of the horizontal drive group is started, which drives the horizontal lead screw to rotate, causing the horizontal slider to move linearly along the horizontal rail frame. Then, the particulate matter filtration mechanism is pulled out as a whole through the horizontal connecting arm. During this process, the horizontal connecting arm is linked with the rack and pinion, which drives the gear to rotate, driving the vertical lead screw to move the vertical slider. The vertical connecting arm simultaneously pulls out the adsorption and purification mechanism. At the same time, the filter screen adopts a hexagonal frame and hexagonal block magnetic connection, which can be quickly disassembled without tools. The entire linkage mechanism eliminates the tediousness of disassembling the filter element one by one in the traditional way. Multiple parts can be disassembled in one operation, which greatly shortens the maintenance time and reduces maintenance costs. This device effectively prevents dust from clogging the filter screen through the coordinated operation of multiple structures. During application, the second motor in the air inlet hopper drives the turntable to rotate. The cleaning shovel and cleaning brush on the turntable continuously clean the surface of the conical filter screen, promptly removing large dust particles and brushing away residual impurities. At the same time, the air guide hopper guides the smooth flow of gas and helps the dust fall into the collection sleeve. The funnel-shaped design inside the sleeve facilitates the collection and discharge of dust. In addition, before the gas enters the adsorption and purification mechanism, it first passes through the filter screen for preliminary filtration, reducing the risk of large dust particles clogging the activated carbon filter and desiccant filter, ensuring the stable operation of the entire filtration system for a long time and reducing the frequency of maintenance. During application, this device utilizes a conical filter screen design, which significantly increases the contact area with dust compared to a flat filter screen. By leveraging the inertia and gravity of dust particles in the gas, it improves the interception efficiency of large particles. Its unique conical structure allows dust to slide more easily into the collection sleeve, reducing accumulation on the filter screen surface. After initial filtration by the filter screen, the gas then enters the adsorption purification mechanism composed of activated carbon and desiccant filters. The activated carbon filter effectively adsorbs harmful impurities and odors in the gas, while the desiccant filter dries the gas. The modular filter design facilitates replacement and combination, and the square sealing gasket ensures a tight fit between the filter and the filter chamber, preventing gas leakage. The conical filter screen and the adsorption purification mechanism work together to achieve highly efficient filtration and deep purification of the gas, providing a high-purity gas source for the inductively coupled plasma mass spectrometer. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application; Figure 2 This is a bottom-view structural diagram of an embodiment of this application; Figure 3 This is a schematic diagram of the rear view structure in an embodiment of this application; Figure 4 This is a schematic diagram of the front view of the extended state in an embodiment of this application; Figure 5 This is a schematic diagram of the extended rear view structure in an embodiment of this application; Figure 6 This is a schematic diagram of the overall structure of the particulate matter filtration mechanism in the embodiments of this application; Figure 7 This is a schematic diagram of the internal front view of the particulate matter filtration mechanism in the embodiments of this application; Figure 8 This is a schematic diagram of the internal structure of the particulate matter filtration mechanism near the exhaust duct in an embodiment of this application; Figure 9 This is a schematic diagram of the internal structure of the particulate matter filtration mechanism in this embodiment, on the side away from the exhaust duct. Figure 10 This is a schematic diagram of the adsorption and purification mechanism in the embodiments of this application.

[0016] Reference numerals: 1. Filter box; 2. Circular filter chamber; 3. Square filter chamber; 4. Exhaust duct; 5. Adsorption and purification mechanism; 51. Square channel; 52. Filter frame; 53. Activated carbon filter element; 54. Desiccant filter element; 55. Square sealing gasket; 56. Sealing cover plate; 6. Drive mechanism; 61. Lateral drive assembly; 611. Lateral rail frame; 612. First motor; 613. Lateral lead screw; 614. Lateral slider; 615. Lateral connecting arm; 62. Linkage assembly; 621. Connecting frame; 622. Gear; 623. Rack; 63. Longitudinal drive assembly; 631. Vertical rail frame; 632. 7. Vertical lead screw; 633. Longitudinal sliding block; 634. Longitudinal connecting arm; 7. Particulate matter filtration mechanism; 71. Air inlet hopper; 72. Cross-shaped component; 73. Connecting assembly; 731. Second motor; 732. Coupling shaft; 733. Hexagonal block; 734. Hexagonal sleeve; 735. Turntable; 736. Sealing ring; 737. Cleaning plate; 738. Cleaning shovel; 739. Cleaning brush; 7310. Strong magnetic block; 7311. Collection sleeve; 7312. Air guide hopper; 7313. Dust shield; 74. Filter screen cover; 8. Mounting plate; 9. Mounting hole; 10. Air inlet hose; 11. Connecting flange. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0018] This application discloses a gas path filtration device for an inductively coupled plasma mass spectrometer. For example... Figure 1-8 As shown, the filter includes a filter box 1, a circular filter chamber 2 is provided on one side of the filter box 1, and a square filter chamber 3 is provided on the side of the filter box 1 away from the circular filter chamber 2. A drive mechanism 6 is fixedly connected to the center of the front of the filter box 1. A particulate matter filter mechanism 7 is provided inside the drive mechanism 6 near the circular filter chamber 2. The particulate matter filter mechanism 7 is inserted inside the circular filter chamber 2. An adsorption and purification mechanism 5 is fixedly installed on the side of the drive mechanism 6 near the square filter chamber 3. The adsorption and purification mechanism 5 is inserted inside the square filter chamber 3. An exhaust fan 4 is fixedly installed on the side of the filter box 1 near the square filter chamber 3. The drive mechanism 6 includes a horizontal drive group 61, a linkage component 62, and a vertical drive group 63. The horizontal drive group 61 is fixedly installed in the center of the front of the filter housing 1, and the vertical drive group 63 is fixedly installed on the top of the horizontal drive group 61 near the circular filter chamber 2. The particulate matter filtration mechanism 7 is fixedly installed at the moving end of the horizontal drive group 61, and the adsorption and purification mechanism 5 is fixedly installed at the moving end of the vertical drive group 63. The horizontal drive group 61 and the vertical drive group 63 are connected by the linkage component 62. During the application of this device, when the gas path... When the filtration device is running, gas containing impurities enters from the inlet end and first passes through the particulate matter filtration mechanism 7 inserted in the circular filter chamber 2. Its conical filter screen 74 utilizes the inertia and gravity of large dust particles in the gas to achieve efficient interception. The second motor 731 inside the air inlet hopper 71 drives the connecting shaft 732, hexagonal block 733, and hexagonal frame 734 to rotate, causing the cleaning shovel 738 and cleaning brush 739 on the outside of the turntable 735 to continuously clean the surface of the filter screen 74, preventing dust blockage. The cleaned dust is then removed by gravity and airflow. Guided by bucket 7312, the particulate filter falls into collection sleeve 7311. Simultaneously, if maintenance is required, the first motor 612 in the transverse drive group 61 is activated. Its output shaft drives the transverse lead screw 613 to rotate. The transverse sliding block 614, threadedly connected to the lead screw, moves linearly under the constraint of the U-shaped transverse rail frame 611, and the particulate filter mechanism 7 is pulled out entirely via the transverse connecting arm 615. During the movement of the transverse connecting arm 615, the rack 623 on the connecting frame 621 drives the gear 622 to rotate. The vertical lead screw 632, which is fixedly connected to it, rotates synchronously, thereby driving the longitudinal slider 633 to move within the vertical rail frame 631. The adsorption purification mechanism 5, which is inserted into the square filter chamber 3, is then extracted through the longitudinal connecting arm 634. The gas, which has been preliminarily filtered by the particulate matter filter mechanism 7, then enters the adsorption purification mechanism 5. The activated carbon filter element 53 adsorbs harmful impurities and odors, and the desiccant filter element 54 dries the gas. Finally, the purified gas is discharged from the exhaust duct 4, thus achieving efficient filtration of the gas used in the inductively coupled plasma mass spectrometer.

[0019] Please refer to Figures 1-5 A mounting plate 8 is fixedly installed at the bottom of the filter box 1. Mounting holes 9 are provided at the four corners of the mounting plate 8. The mounting holes 9 are countersunk holes. The mounting plate 8 can be fixed to the mounting surface with screws and other connectors through the countersunk holes at the four corners. The countersunk hole structure allows the screw head to be completely recessed into the hole, preventing the screw head from protruding from the surface of the mounting plate 8. On the one hand, this can prevent the screw head from affecting the overall flatness and aesthetics of the device during installation. On the other hand, it can also avoid the safety hazards such as collisions and scratches that protruding screw heads may cause to surrounding equipment or operators.

[0020] Please refer to Figures 1-5The transverse drive assembly 61 includes a transverse rail frame 611, which is fixedly installed in the middle of the front of the filter housing 1. A first motor 612 is fixedly installed at one end of the transverse rail frame 611 near the exhaust duct 4. A transverse lead screw 613 is fixedly installed through the output end of the first motor 612 and passes through the transverse rail frame 611. A transverse sliding block 614 is threaded to the outer surface of the transverse lead screw 613. A transverse connecting arm 615 is fixedly installed on the outer side of the transverse sliding block 614. The outer end of the transverse connecting arm 615 is connected to the particulate matter filtration mechanism 7. The linkage assembly 62 is installed on the top of the transverse rail frame 611. The longitudinal drive assembly 63 includes a vertical rail frame 631, which is fixedly installed on the top of the transverse rail frame 611 near the circular filter chamber 2. A vertical lead screw 632 is rotatably connected inside the vertical rail frame 631. A longitudinal sliding block 633 is threadedly connected to the outer surface of the vertical lead screw 632. A longitudinal connecting arm 634 is fixedly installed on the back of the longitudinal sliding block 633. The outer end of the longitudinal connecting arm 634 is connected to the adsorption and purification mechanism 5. The cross-sectional shape of the internal cavity of the horizontal rail frame 611 and the internal cavity of the vertical rail frame 631 are both set as convex. The cross-sectional shape of the horizontal sliding block 614 and the longitudinal cross-sectional shape of the longitudinal sliding block 633 are also set as convex. The linkage component 62 includes a connecting frame 621 and a gear 622. The gear 622 is rotatably connected to the bottom of the vertical rail frame 631. The connecting frame 621 is fixedly connected to the outside of the horizontal connecting arm 615. The top of the connecting frame 621 is fixed. A rack 623 is connected, and the rack 623 meshes with a gear 622. The top of the gear 622 is fixedly connected to the bottom of the vertical lead screw 632. During use, when it is necessary to operate the particulate matter filtration mechanism 7 and the adsorption purification mechanism 5 in the air filtration device, the first motor 612 is started. The output end of the first motor 612 drives the transverse lead screw 613 to rotate. Since the transverse slider 614 is threadedly connected to the transverse lead screw 613, and the transverse rail frame 611 and the transverse slider 614 adopt a convex cross-section design, the transverse slider 614 can only move linearly along the transverse rail frame 611. When the transverse slider 614 moves, the outer transverse connecting arm 615 drives the particulate matter filtration mechanism 7 connected to it to move as a whole, thereby realizing the movement of the particulate matter filtration mechanism 7. During the extraction or insertion operation, as the transverse connecting arm 615 moves, the connecting frame 621 fixed to its outer side moves synchronously. The rack 623 at the top of the connecting frame 621 moves laterally accordingly, meshing with the gear 622 and causing the gear 622 to rotate. Because the top of the gear 622 is fixedly connected to the bottom of the vertical lead screw 632, the rotation of the gear 622 will cause the vertical lead screw 632 to rotate synchronously. When the vertical lead screw 632 rotates, the longitudinal sliding block 633, which is threadedly connected to it, moves linearly within the vertical rail frame 631. The longitudinal connecting arm 634 on the back of the longitudinal sliding block 633 will then drive the adsorption purification mechanism 5 to move accordingly, thereby realizing the extraction or insertion of the adsorption purification mechanism 5. Through this transmission structure, only the first motor 612 needs to be started.This allows the linkage component 62 to enable coordinated operation of the transverse drive group 61 and the longitudinal drive group 63, achieving synchronous operation of the two mechanisms and facilitating rapid disassembly, assembly, inspection, and maintenance.

[0021] Please refer to Figures 4-9The particulate matter filtration mechanism 7 includes an air inlet 71, which is fixedly installed on the outer end of the transverse connecting arm 615. A cross 72 is fixedly installed inside the air inlet 71, and a connecting assembly 73 is fixedly installed on the inner side of the cross 72. A filter screen 74 is fixedly installed at the end of the connecting assembly 73. The connecting assembly 73 includes a second motor 731, which is fixedly installed on the inner side of the cross 72. A coupling 732 is fixedly installed at the output end of the second motor 731, and a hexagonal block 733 is fixedly installed at the end of the coupling 732. A hexagonal frame 734 is fitted on the outer side of the hexagonal block 733, and a turntable 735 is fixedly installed on the side of the hexagonal frame 734 away from the hexagonal block 733. The filter screen 74 is rotatably connected to the outer side of the connecting assembly 73. A filter screen 74 is inserted into the interior of a circular filter chamber 2. A sealing ring 736 is fixedly installed on the outer side of the filter screen 74, and the outer side of the sealing ring 736 is in close contact with the inner wall of the circular filter chamber 2. Cleaning plates 737 are fixedly connected to the outer side of a turntable 735 in a ring at equal intervals. A cleaning scraper 738 is fixedly connected to one side of the cleaning plate 737 near the filter screen 74, and a cleaning brush 739 is fixedly connected to the other side of the cleaning plate 737 near the filter screen 74. The inner sides of the cleaning brush 739 and the cleaning scraper 738 are in close contact with the outer surface of the filter screen 74. A strong magnet 7310 is fixedly connected to the inner side of a hexagonal block 733, and the strong magnet 7310 is magnetically connected to the hexagonal frame 734. The overall shape of the filter screen 74 is... The filter screen 74 is cone-shaped, with a collection sleeve 7311 fixedly connected to its outer side. A guide hopper 7312 is fixedly installed on the side of the collection sleeve 7311 near the circular filter chamber 2. The end of the collection sleeve 7311 near the guide hopper 7312 is also funnel-shaped. An air inlet hose 10 is fixedly connected to the outer end of the air inlet hopper 71. A connecting flange 11 is fixedly connected to the outer ends of both the air inlet hose 10 and the exhaust hopper 4. A dust baffle 7313 is bolted to the end of the second motor 731 near the air inlet hopper 71. The dust baffle 7313 is cone-shaped. During the operation of the particulate matter filtration mechanism 7, gas containing large dust particles enters the air inlet hopper 71 through the air inlet hose 10 and then flows to the cone-shaped filter screen 74. Due to filtration... The unique conical shape of the filter screen 74 allows large dust particles to be more easily intercepted and adsorbed onto the filter surface under the influence of inertia and gravity when air passes through, increasing the contact area with the dust and improving the filtration effect. Simultaneously, the second motor 731 inside the air inlet hopper 71 starts, its output driving the coupling 732 to rotate. The hexagonal block 733 at the end of the coupling 732 is magnetically connected to the hexagonal frame 734 via a powerful magnet 7310, which in turn drives the turntable 735 to rotate. The cleaning plate 737 on the outside of the turntable 735 rotates accordingly. The cleaning scraper 738 on the cleaning plate 737 scrapes off the large dust particles adsorbed on the surface of the filter screen 74, while the cleaning brush 739 brushes the outer surface of the filter screen 74. The combined action of these two processes ensures effective cleaning of the outer surface of the filter screen.To prevent large particles from clogging the filter screen 74, the cleaned dust falls into the collection sleeve 7311 under gravity. The air guide hopper 7312 on the side of the collection sleeve 7311 near the circular filter chamber 2 utilizes the force of airflow to smoothly discharge the dust from the collection sleeve 7311. The sealing ring 736 ensures a tight seal between the filter screen 74 and the inner wall of the circular filter chamber 2, preventing gas leakage. The conical dust baffle 7313 prevents dust from entering the second motor 731, ensuring normal motor operation and thus achieving continuous and efficient particulate matter filtration.

[0022] Please refer to Figures 1-5 and Figure 10 The adsorption purification mechanism 5 includes a square groove 51, which is located on the top of the filter box 1 near the square filter chamber 3. The bottom of the square groove 51 is connected to the interior of the square filter chamber 3. A filter frame 52 is slidably connected inside the square groove 51. An activated carbon filter element 53 and a desiccant filter element 54 are slidably connected to the two sides of the inside of the filter frame 52, respectively. A square sealing gasket 55 is fixedly connected to the outer side of both the activated carbon filter element 53 and the desiccant filter element 54. The outer side of the square sealing gasket 55 is fitted to the inner wall of the square filter chamber 3. A sealing cover plate 56 is fixedly installed on the top of the filter frame 52. One side of the sealing cover plate 56 is fixedly connected to the outer end of the longitudinal connecting arm 634. The sealing cover plate 56 covers the top of the square groove 51. During the application of this device, after the gas has been initially filtered by the particulate matter filtration mechanism 7, it will enter the adsorption purification mechanism 5 in the square filter chamber 3 through the square groove 51. The filter frame 52 is slidably connected to the square groove 51. The filter frame 52 is installed between the square groove 51 and the square filter chamber 3. The longitudinal connecting arm 634 is connected to the sealing cover plate 56, which can drive the entire filter frame 52 to slide along the square groove 51, facilitating installation, disassembly and maintenance. Inside the filter frame 52, the activated carbon filter element 53 and the desiccant filter element 54 are responsible for deep purification of the gas. The activated carbon filter element 53 uses its well-developed pore structure to adsorb harmful impurities, odors and other substances in the gas; the desiccant filter element 54 reduces the humidity of the gas by adsorbing moisture in the gas, thus achieving the drying function. The square sealing gasket 55 fits tightly against the inner wall of the square filter chamber 3, ensuring that the gas can only be filtered through the filter element, avoiding the leakage of unpurified gas and ensuring the purification effect. The sealing cover plate 56 covers the top of the square groove 51, which can prevent external impurities from entering the filter frame 52 and ensure the stable operation of the activated carbon filter element 53 and the desiccant filter element 54, achieving efficient adsorption purification and drying of the gas.

[0023] The implementation principle of the gas path filtration device for an inductively coupled plasma mass spectrometer according to this application embodiment is as follows: During actual use, when maintenance is required on the particulate matter filtration mechanism 7 and the adsorption purification mechanism 5 inside the gas path filtration device, the first motor 612 in the transverse drive group 61 is started. After the first motor 612 starts running, its output shaft drives the transverse lead screw 613 to rotate. The transverse slider 614 is connected to the transverse lead screw 613 by a thread, and the transverse rail frame 611 and the transverse slider 614 adopt a special convex cross-section design to restrict the movement direction of the transverse slider 614. As the first motor 612 drives the transverse lead screw 613 to rotate, the transverse slider 614 moves along... As the transverse rail 611 moves in a straight line, the transverse sliding block 614 moves, and the transverse connecting arm 615 fixed on its outer side drives the connected particulate filter mechanism 7 to be pulled out as a whole. Since the hexagonal frame 734 and the hexagonal block 733 are magnetically connected, the filter screen 74 can be pulled out when the transverse connecting arm 615 moves. After being pulled out, the filter screen 74 is pulled by external force, and the hexagonal frame 734 overcomes the magnetic attraction of the strong magnetic block 7310 and detaches from the surface of the hexagonal block 733, thereby quickly disassembling the filter screen 74. This design makes the entire disassembly process do not require additional tools, and the operation steps are simple and direct. Compared with the traditional bolt connection method, it greatly improves the disassembly efficiency. During the movement of the transverse connecting arm 615, the connecting frame 621 connected to its outer side slides laterally in sync with the transverse sliding slider 614. The rack 623 on the connecting frame 621 also moves laterally. When the rack 623 moves laterally, it drives the gear 622 meshing with it to rotate. Since the top of the gear 622 is fixedly connected to the bottom of the vertical lead screw 632, the rotation of the gear 622 drives the vertical lead screw 632 to rotate synchronously. When the vertical lead screw 632 rotates, the longitudinal sliding slider 633 threaded to it moves linearly in the vertical rail frame 631. The longitudinal connecting arm 634 on the back of the longitudinal sliding slider 633 pulls the adsorption purification mechanism 5 out of the square filter chamber 3. Through the linkage of this series of components, only the first motor 612 needs to be started to quickly pull out the particulate matter filter mechanism 7 and the adsorption purification mechanism 5 at the same time, greatly reducing the steps required for disassembly and assembly. This linkage design avoids the cumbersome process of disassembling multiple filter elements separately in traditional equipment, and realizes the synchronous disassembly of multiple components in one operation, effectively shortening the maintenance time. During the gas filtration process, gas containing large dust particles enters the air intake hopper 71 through the air intake hose 10, and then reaches the conical filter screen 74. When the gas passes through the filter screen 74, the large dust particles are more easily intercepted and adsorbed on the filter surface due to inertia and gravity. Compared with a flat filter screen, the conical design increases the contact area between the filter screen and the dust, improving the filtration effect. At the same time, the second motor 731 inside the air intake hopper 71 starts, and its output end drives the coupling 732 to rotate. The hexagonal block 733 at the end of the coupling 732 drives the hexagonal frame 734 and the turntable 735 to rotate synchronously through magnetic connection. The cleaning plates 737 arranged in a ring at equal intervals on the outer side of the turntable 735 rotate accordingly. The cleaning scraper 738 on the cleaning plate 737 scrapes off the large dust particles adsorbed on the surface of the filter screen 74, and the cleaning brush 739 cleans the surface of the filter screen. The outer surface of the filter screen 74 is brushed, and the two work together to ensure effective cleaning of the outer surface of the filter screen 74, preventing large particles from clogging the filter screen 74. The cleaned dust falls into the collection sleeve 7311 under the action of gravity. Due to the setting of the air guide hopper 7312, the gas can enter the collection sleeve 7311 more smoothly, and assist the gas to pass through the conical filter screen 74 for better filtration and screening. When the hexagonal frame 734 is separated from the surface of the hexagonal block 733, the filter screen 74 can be removed, and then the collection sleeve 7311 can be poured out. The inside of the collection sleeve 7311 is funnel-shaped, which facilitates the discharge of dust removed from the outer surface of the filter screen 74, making it convenient to clean and maintain the filter screen 74. This combination of automatic cleaning and collection structure ensures the long-term stable filtration performance of the filter screen and reduces the frequency of manual intervention. After initial filtration by the filter screen 74, the gas continues to pass through the activated carbon filter element 53 and the desiccant filter element 54. The activated carbon filter element 53 adsorbs harmful impurities and odors in the gas, while the desiccant filter element 54 dries the gas, further improving the gas filtration effect. When maintenance of the activated carbon filter element 53 and the desiccant filter element 54 is required, the longitudinal drive assembly 63 pulls the filter frame 52 out of the square groove 51, and the activated carbon filter element 53 and the desiccant filter element 54 can be removed from the filter frame 52. During installation, the square sealing gasket 55 on the outside of the activated carbon filter element 53 and the desiccant filter element 54 fits tightly against the inner wall of the square filter chamber 3 to ensure the sealing of the device and ensure stable filtration and adsorption performance. This modular filter element design not only facilitates replacement but also allows for flexible adjustment of the filter element combination according to actual usage needs, adapting to different gas purification requirements.

[0024] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gas path filtration device for an inductively coupled plasma mass spectrometer, characterized in that: The filter includes a filter box (1), a circular filter chamber (2) is provided on one side of the filter box (1), and a square filter chamber (3) is provided on the side of the filter box (1) away from the circular filter chamber (2). A drive mechanism (6) is fixedly connected to the center of the front of the filter box (1). A particulate matter filtration mechanism (7) is provided inside the drive mechanism (6) near the circular filter chamber (2). The particulate matter filtration mechanism (7) is inserted into the circular filter chamber (2). An adsorption purification mechanism (5) is fixedly installed on the side of the drive mechanism (6) near the square filter chamber (3). The adsorption purification mechanism (5) is inserted into the square filter chamber (3). An exhaust fan (4) is fixedly installed on the side of the filter box (1) near the square filter chamber (3). The drive mechanism (6) includes a horizontal drive group (61), a linkage component (62), and a vertical drive group (63). The horizontal drive group (61) is fixedly installed in the center of the front of the filter box (1). The vertical drive group (63) is fixedly installed on the top of the horizontal drive group (61) near the circular filter chamber (2). The particulate matter filtration mechanism (7) is fixedly installed on the moving end of the horizontal drive group (61). The adsorption and purification mechanism (5) is fixedly installed on the moving end of the vertical drive group (63). The horizontal drive group (61) and the vertical drive group (63) are connected by the linkage component (62). The transverse drive assembly (61) includes a transverse rail frame (611), which is fixedly installed in the middle of the front of the filter box (1). A first motor (612) is fixedly installed at one end of the transverse rail frame (611) near the exhaust hopper (4). A transverse lead screw (613) is fixedly installed through the transverse rail frame (611) at the output end of the first motor (612). A transverse sliding block (614) is threadedly connected to the outer surface of the transverse lead screw (613). A transverse connecting arm (615) is fixedly installed on the outer side of the transverse sliding block (614). The outer end of the transverse connecting arm (615) is connected to the particulate filter mechanism (7). The linkage assembly (62) is installed on the top of the transverse rail frame (611). The longitudinal drive assembly (63) includes a vertical rail frame (631), which is fixedly installed on the top of the transverse rail frame (611) near the circular filter chamber (2). The vertical rail frame (631) is rotatably connected to a vertical lead screw (632), and the outer surface of the vertical lead screw (632) is threadedly connected to a longitudinal sliding block (633). A longitudinal connecting arm (634) is fixedly installed on the back of the longitudinal sliding block (633), and the outer end of the longitudinal connecting arm (634) is connected to the adsorption and purification mechanism (5). The cross-sectional shape of the internal cavity of the transverse rail frame (611) and the internal cavity of the vertical rail frame (631) is set to a convex shape. The cross-sectional shape of the transverse sliding block (614) and the longitudinal cross-sectional shape of the longitudinal sliding block (633) are also set to a convex shape. The particulate matter filtration mechanism (7) includes an air inlet hopper (71), which is fixedly installed at the outer end of the transverse connecting arm (615). A cross (72) is fixedly installed inside the air inlet hopper (71), and a connecting component (73) is fixedly installed on the inner side of the cross (72). A filter screen (74) is fixedly installed at the end of the connecting component (73).

2. The gas path filtration device for an inductively coupled plasma mass spectrometer according to claim 1, characterized in that: The bottom of the filter box (1) is fixedly installed with an installation plate (8), and the four corners of the installation plate (8) are provided with installation holes (9), which are countersunk holes.

3. The gas path filtration device for an inductively coupled plasma mass spectrometer according to claim 2, characterized in that: The linkage component (62) includes a connecting frame (621) and a gear (622). The gear (622) is rotatably connected to the bottom of the vertical rail frame (631). The connecting frame (621) is fixedly connected to the outside of the horizontal connecting arm (615). A rack (623) is fixedly connected to the top of the connecting frame (621). The rack (623) and the gear (622) are meshed together. The top of the gear (622) is fixedly connected to the bottom of the vertical lead screw (632).

4. The gas path filtration device for an inductively coupled plasma mass spectrometer according to claim 3, characterized in that: The connecting assembly (73) includes a second motor (731), which is fixedly installed inside the cross (72). A connecting shaft (732) is fixedly installed at the output end of the second motor (731). A hexagonal block (733) is fixedly installed at the end of the connecting shaft (732). A hexagonal frame (734) is fitted on the outside of the hexagonal block (733). A turntable (735) is fixedly installed on the side of the hexagonal frame (734) away from the hexagonal block (733). The filter screen (74) is rotatably connected to the outside of the connecting assembly (73) and is inserted into the inner part of the circular filter chamber (2). The filter screen cover (74) is fixedly installed with a sealing ring (736) on the outside. The outer side of the sealing ring (736) is in close contact with the inner wall of the circular filter chamber (2). The outer side of the turntable (735) is fixedly connected with cleaning plates (737) arranged in a ring at equal intervals. A cleaning scraper (738) is fixedly connected to one side of the cleaning plate (737) near the filter screen cover (74). A cleaning brush (739) is fixedly connected to the other side of the cleaning plate (737) near the filter screen cover (74). The inner sides of the cleaning brush (739) and the cleaning scraper (738) are in close contact with the outer surface of the filter screen cover (74).

5. The gas path filtration device for an inductively coupled plasma mass spectrometer according to claim 4, characterized in that: A strong magnetic block (7310) is fixedly connected to the inner side of the hexagonal block (733). The strong magnetic block (7310) and the hexagonal frame (734) are magnetically connected. The overall shape of the filter screen (74) is conical. A collection sleeve (7311) is fixedly connected to the outer side of the filter screen (74). A guide hopper (7312) is fixedly installed on the side of the collection sleeve (7311) near the circular filter chamber (2). The end of the collection sleeve (7311) near the guide hopper (7312) is also funnel-shaped.

6. The gas path filtration device for an inductively coupled plasma mass spectrometer according to claim 5, characterized in that: An air inlet hose (10) is fixedly connected to the outer end of the air inlet hopper (71). A connecting flange (11) is fixedly connected to the outer end of the air inlet hose (10) and the outer end of the exhaust hopper (4). A dust cover (7313) is bolted to one end of the second motor (731) near the air inlet hopper (71). The dust cover (7313) is generally conical.

7. The gas path filtration device for an inductively coupled plasma mass spectrometer according to claim 6, characterized in that: The adsorption purification mechanism (5) includes a square groove (51), which is located on the top of the filter box (1) near the square filter chamber (3). The bottom of the square groove (51) is connected to the inside of the square filter chamber (3). A filter frame (52) is slidably connected inside the square groove (51). An activated carbon filter element (53) and a desiccant filter element (54) are slidably connected to the two sides inside the filter frame (52). A square sealing gasket (55) is fixedly connected to the outside of both the activated carbon filter element (53) and the desiccant filter element (54). The outside of the square sealing gasket (55) is fitted to the inner wall of the square filter chamber (3). A sealing cover plate (56) is fixedly installed on the top of the filter frame (52). One side of the sealing cover plate (56) is fixedly connected to the outer end of the longitudinal connecting arm (634). The sealing cover plate (56) covers the top of the square groove (51).

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