Gas path filtering device of inductively coupled plasma mass spectrometer

Abstract

The application relates to the gas path filtering technical field, in particular to a gas path filtering device of an inductively coupled plasma mass spectrometer, which comprises a filtering box, the middle part of the left end of the filtering box is fixedly connected with an air inlet pipe, the middle part of the right end of the filtering box is fixedly connected with an air outlet pipe, the upper end of the filtering box is fixedly connected with positioning blocks in the periphery, a filtering cavity is arranged in the filtering box, a primary filtering layer plate, a high-efficiency filtering layer plate, an activated carbon adsorption layer plate, a sterilization filtering layer plate and a drying layer plate are sequentially inserted into a slot from left to right, positioning grooves are formed in the lower end of the four corners of a cover plate, five clamping grooves are formed in the rear end of the cover plate, and a handle is fixedly connected with the middle part of the upper end of the cover plate. The symmetrical distribution of the air inlet pipe and the air outlet pipe reduces gas turbulence, the linear arrangement of the multi-stage filtering layer plates realizes efficient purification, the structural design of the positioning blocks and the T-shaped clamping grooves makes the filtering layer plates convenient to disassemble and replace, and the gas path filtering effect and the maintenance efficiency are effectively improved.

Description

Technical Field

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

[0002] Inductively coupled plasma mass spectrometry (ICP-MS) uses high-frequency plasma to ionize the sample into ions at high temperature. The generated ions are then focused by an ion optical lens and separated by a quadrupole mass spectrometer according to their charge-to-mass ratio. This allows for both semi-quantitative analysis based on charge-to-mass ratio and quantitative analysis based on the number of ions with a specific charge-to-mass ratio. However, there is a relative lack of equipment on the market specifically designed for purifying the inlet gas for ICP-MS. Existing gas filtration devices generally suffer from the following problems:

[0003] Existing gas filtration devices struggle to completely and thoroughly remove impurities, dust, and moisture from argon. For example, some common argon purification devices have inadequate internal filtration structures, preventing sufficient contact between the gas and filter material. This allows some impurities, dust, and moisture to bypass the filter, resulting in argon purity failing to meet the stringent requirements of ICP-MS. This significantly impacts the accuracy and reliability of the instrument's analytical results. Furthermore, traditional gas filtration devices often lack sufficient consideration for ease of maintenance. When filter replacement is needed, the complex structure and cumbersome connections between components require significant time and effort from operators to disassemble the device, potentially damaging other components during the process. Additionally, some devices lack flexible filter installation methods, hindering quick and accurate positioning and replacement, greatly reducing maintenance efficiency, increasing instrument downtime, and causing numerous inconveniences in practical use. Utility Model Content

[0004] To address the problems mentioned in the background art, this application provides a gas path filtration device for an inductively coupled plasma mass spectrometer.

[0005] This application provides a gas path filtration device for an inductively coupled plasma mass spectrometer, employing the following technical solution: It includes a filter box, with an inlet pipe fixedly connected to the middle of the left end of the filter box, an exhaust pipe fixedly connected to the middle of the right end of the filter box, positioning blocks fixedly connected to all four sides of the upper end of the filter box, a filter chamber inside the filter box, and five slots opened in the middle of the upper end of the filter box. From left to right, a primary filter plate, a high-efficiency filter plate, an activated carbon adsorption plate, a sterilization filter plate, and a drying plate are sequentially inserted into the slots. A cover plate is fixedly connected to the upper ends of the primary filter plate, high-efficiency filter plate, activated carbon adsorption plate, sterilization filter plate, and drying plate. Positioning grooves are opened at the four corners of the lower end of the cover plate, and five snap-fit ​​grooves are opened at the rear end of the cover plate. A handle is fixedly connected to the middle of the upper end of the cover plate.

[0006] Optionally, the intake pipe and exhaust pipe are symmetrically distributed at the middle of the left and right ends of the filter box, and the axes of the intake pipe and exhaust pipe are parallel to the transverse center line of the filter box.

[0007] Optionally, the positioning block is rectangular and is evenly distributed around the upper part of the filter box, with the upper surface of the positioning block higher than the upper surface of the filter box.

[0008] Optionally, the five slots are arranged in a straight line at equal intervals in the middle of the upper end of the filter box, and the depth of the slots extends through the upper surface of the filter box into the filter cavity.

[0009] Optionally, the primary filter plate, high-efficiency filter plate, activated carbon adsorption plate, sterilization filter plate, and drying plate are all rectangular plates, and the dimensions of the primary filter plate, high-efficiency filter plate, activated carbon adsorption plate, sterilization filter plate, and drying plate are adapted to the slots one by one.

[0010] Optionally, the positioning groove is formed around the lower end of the cover plate, and the shape of the positioning groove matches the positioning block, so that the positioning block can be engaged in the positioning groove.

[0011] Optionally, the snap-fit ​​grooves are evenly distributed along the length of the rear end of the cover plate, and the number and position of the snap-fit ​​grooves correspond to the slots. All the snap-fit ​​grooves are T-shaped.

[0012] In summary, this application includes the following beneficial technical effects:

[0013] This invention features an intake and exhaust pipe symmetrically distributed at the center of both ends of the filter chamber, with their axes parallel to the horizontal centerline of the filter chamber. This design allows gas to pass smoothly through the filter chamber in a straight line, reducing gas turbulence and ensuring full contact between the gas and the primary filter plate, high-efficiency filter plate, activated carbon adsorption plate, sterilization filter plate, and drying plate during the filtration process. Simultaneously, the slots arranged at equal intervals in a straight line allow the filter plates to be inserted in an orderly manner, forming a multi-stage filtration structure. The gas passes through each filter plate sequentially and evenly, preventing gas from bypassing any filter plate. Each filter plate performs its specific function: the primary filter plate performs preliminary filtration, the high-efficiency filter plate further refines the filtration, the activated carbon adsorption plate adsorbs impurities, the sterilization filter plate removes bacteria, and the drying plate dries the gas. This comprehensively and thoroughly removes impurities, dust, and moisture from the argon gas, greatly improving the purity of the argon gas and ensuring the accuracy and reliability of ICP-MS analysis results.

[0014] This invention achieves rapid positioning and installation of the cover and filter box by precisely matching and engaging the positioning blocks around the upper perimeter of the filter box with the positioning grooves at the lower end of the cover. It also enhances the stability of the connection during use. The T-shaped engaging grooves, evenly spaced at the rear end of the cover and corresponding to the slots, allow for precise engagement of each filter layer from the rear. Operators can open the cover using the handle in the middle of the upper part of the cover. This structural design makes the disassembly and replacement of the filter layers extremely convenient. When filter layers need to be replaced, no complicated operations are required; simply opening the cover allows for quick and precise disassembly and replacement of each filter layer. This saves time and effort, avoids damage to other components during disassembly, and significantly improves the efficiency of maintenance work. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of an embodiment of this application;

[0016] Figure 2 This is a schematic diagram of a partial cross-section structure in an embodiment of this application;

[0017] Figure 3 These are partial structural schematic diagrams of embodiments of this application;

[0018] Figure 4 This is a partial structural schematic diagram of an embodiment of this application.

[0019] Reference numerals: 1. Inlet pipe; 2. Exhaust pipe; 3. Filter box; 4. Handle; 5. Cover plate; 6. Positioning block; 7. Slot; 8. Primary filter plate; 9. High-efficiency filter plate; 10. Activated carbon adsorption plate; 11. Sterilization filter plate; 12. Drying plate; 13. Snap-fit ​​groove; 14. Positioning groove; 15. Filter chamber. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0021] This application discloses a gas path filtration device for an inductively coupled plasma mass spectrometer. For example... Figure 1 and Figure 2 As shown, the filter includes a filter box 3. An air inlet pipe 1 is fixedly connected to the middle of the left end of the filter box 3, and an exhaust pipe 2 is fixedly connected to the middle of the right end of the filter box 3. The air inlet pipe 1 and the exhaust pipe 2 are symmetrically distributed at the middle of the left and right ends of the filter box 3, and the axes of the air inlet pipe 1 and the exhaust pipe 2 are parallel to the transverse center line of the filter box 3, so that the gas can pass smoothly through the filter chamber 15 in the filter box 3 in a straight line, reducing gas turbulence and ensuring that the gas is in full contact with each filter plate during the filtration process, effectively improving the filtration effect. The filter box 3 is provided with a filter chamber 15.

[0022] Please see Figure 3 Positioning blocks 6 are fixedly connected to the upper four sides of the filter box 3. The positioning blocks 6 can be snapped into the positioning grooves 14. The positioning blocks 6 are rectangular blocks. The rectangular blocks 6 fit the shape of the positioning grooves 14 at the lower end of the cover plate 5. When installing the cover plate 5, positioning can be performed quickly and accurately, which greatly improves the installation efficiency. The positioning blocks 6 are evenly distributed around the upper four sides of the filter box 3, and the upper surface of the positioning blocks 6 is higher than the upper surface of the filter box 3. The design of even distribution at the four corners makes the cover plate 5 subject to positioning constraints from four directions during installation, effectively preventing the cover plate 5 from shifting or tilting, ensuring that the cover plate 5 is tightly fitted to the filter box 3, thereby ensuring the sealing of the device and preventing the leakage of unfiltered gas. At the same time, it also provides a stable installation environment for each filter plate.

[0023] Please see Figure 3 and Figure 4Five slots 7 are located in the middle of the upper part of the filter box 3. These slots 7 are arranged in a straight line with equal spacing, and their depth extends through the upper surface of the filter box 3 into the filter chamber 15. From left to right, the slots 7 are connected to a primary filter plate 8, a high-efficiency filter plate 9, an activated carbon adsorption plate 10, a sterilizing filter plate 11, and a drying plate 12. The straight-line, equally spaced slots 7 allow the primary filter plate 8, high-efficiency filter plate 9, activated carbon adsorption plate 10, sterilizing filter plate 11, and drying plate 12 to be inserted vertically and orderly into the filter chamber 15, forming a regular multi-stage filtration structure. This arrangement ensures that when gas flows within the filter chamber 15, it passes through each filter plate sequentially and evenly, preventing gas from bypassing any filter plate. This configuration ensures that each filter plate performs its specific function and achieves optimal filtration performance. The primary filter plate 8, high-efficiency filter plate 9, activated carbon adsorption plate 10, sterilization filter plate 11, and drying plate 12 are all rectangular plates. The upper ends of the primary filter plate 8, high-efficiency filter plate 9, activated carbon adsorption plate 10, sterilization filter plate 11, and drying plate 12 are all fixedly connected to a cover plate 5. The dimensions of the primary filter plate 8, high-efficiency filter plate 9, activated carbon adsorption plate 10, sterilization filter plate 11, and drying plate 12 are matched one-to-one with the slots 7. The through-hole slot 7 depth design ensures that the filter plates can be firmly installed in the filter chamber 15 without loosening or shaking, guaranteeing the stability and continuity of the filtration process and effectively improving the overall filtration performance.

[0024] Please see Figure 2 , Figure 3 and Figure 4The cover plate 5 has positioning grooves 14 at each of its four lower corners. These grooves 14 are located around the lower perimeter of the cover plate 5 and their shapes match those of the positioning blocks 6. This precise matching and engagement of the positioning grooves 14 and 6 not only enables quick positioning and installation of the cover plate 5 and the filter box 3, but more importantly, it enhances the stability of the connection during use. The rear end of the cover plate 5 has five snap-fit ​​grooves 13, evenly spaced along the length of the rear end of the cover plate 5. The number and position of the snap-fit ​​grooves 13 correspond to the slots 7. This evenly spaced distribution and correspondence with the slots 7 ensures that after the primary filter plate 8, high-efficiency filter plate 9, activated carbon adsorption plate 10, sterilization filter plate 11, and drying plate 12 are inserted into the slots 7, the snap-fit ​​grooves 13 can... The rear end precisely engages each layer of the filter plate, which effectively disperses the gas impact force on the filter plate when the gas passes through the filter chamber 15, avoiding uneven local stress that could cause the filter plate to loosen. This ensures the stability of the multi-stage filtration structure during long-term use and maintains the efficient operation of the gas filtration device. The locking grooves 13 are all T-shaped, which can form a firm locking connection with the filter plate. Their unique shape provides a large contact area and a strong mechanical limiting effect. When the filter plate is inserted into the slot 7 and locked into the T-shaped locking groove 13, it can prevent the filter plate from shifting in the vertical and horizontal directions. A handle 4 is fixedly connected to the upper middle part of the cover plate 5. The handle 4 is located in the upper middle part of the cover plate 5, which conforms to the ergonomic design and is easy for the operator to grip and apply force.

[0025] The implementation principle of the gas path filtration device for an inductively coupled plasma mass spectrometer according to this application embodiment is as follows: When the gas path filtration device of the inductively coupled plasma mass spectrometer is working, gas enters the filter chamber 15 from the inlet pipe 1 at the middle of the left end of the filter box 3. Since the inlet pipe 1 and the exhaust pipe 2 are symmetrically distributed at the middle of the left and right ends of the filter box 3 and their axes are parallel to the transverse center line of the filter box 3, the gas can pass through the filter chamber 15 smoothly in a straight line, reducing turbulence and ensuring full contact with each filter plate. The positioning blocks 6 around the upper end of the filter box 3 are engaged with the positioning grooves 14 at the lower end of the cover plate 5 to ensure that the cover plate 5 and the filter box 3 are tightly fitted and to ensure the sealing of the device. The primary filter plate 8 and the high efficiency filter plate 8 are sequentially inserted into the five slots 7 arranged in a straight line at equal intervals in the middle of the upper end of the filter box 3. The gas passes through the filter plate 9, activated carbon adsorption plate 10, sterilization filter plate 11, and drying plate 12 in sequence. The primary filter plate 8 performs preliminary filtration, the high-efficiency filter plate 9 performs further fine filtration, the activated carbon adsorption plate 10 adsorbs impurities, the sterilization filter plate 11 removes bacteria, and the drying plate 12 dries the gas. Five T-shaped locking slots 13, evenly spaced at the rear end of the cover plate 5 and corresponding to the slots 7, lock the plates from the rear end, disperse the gas impact force, and prevent the filter plates from loosening. Finally, the gas that has undergone multi-stage filtration is discharged from the exhaust pipe 2 at the middle right end of the filter box 3, completing the entire gas filtration process. The operator can open the cover plate 5 through the ergonomically designed handle 4 at the middle upper end of the cover plate 5 to replace and maintain the filter plates.

[0026] 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, comprising a filter box (3), characterized in that: An air inlet pipe (1) is fixedly connected to the middle of the left end of the filter box (3), and an exhaust pipe (2) is fixedly connected to the middle of the right end of the filter box (3). Positioning blocks (6) are fixedly connected to all four sides of the upper end of the filter box (3). A filter chamber (15) is provided inside the filter box (3). Five slots (7) are opened in the middle of the upper end of the filter box (3). From left to right, a primary filter plate (8), a high-efficiency filter plate (9), and an activated carbon adsorption plate are inserted into the slots (7). (10) Sterilization filter plate (11) and drying plate (12). The upper ends of the primary filter plate (8), high efficiency filter plate (9), activated carbon adsorption plate (10), sterilization filter plate (11) and drying plate (12) are all fixedly connected to a cover plate (5). The lower end of the cover plate (5) has positioning grooves (14) at the four corners. The rear end of the cover plate (5) has five snap-fit ​​grooves (13). The upper middle part of the cover plate (5) is fixedly connected to a handle (4).

2. The gas path filtration device for an inductively coupled plasma mass spectrometer according to claim 1, characterized in that: The intake pipe (1) and exhaust pipe (2) are symmetrically distributed at the middle of the left and right ends of the filter box (3), and the axes of the intake pipe (1) and exhaust pipe (2) are parallel to the transverse center line of the filter box (3).

3. The gas path filtration device for an inductively coupled plasma mass spectrometer according to claim 1, characterized in that: The positioning block (6) is rectangular and is evenly distributed around the upper part of the filter box (3), with the upper surface of the positioning block (6) higher than the upper surface of the filter box (3).

4. The gas path filtration device for an inductively coupled plasma mass spectrometer according to claim 1, characterized in that: The five slots (7) are arranged in a straight line at equal intervals in the middle of the upper end of the filter box (3), and the depth of the slots (7) extends through the upper surface of the filter box (3) into the filter cavity (15).

5. The gas path filtration device for an inductively coupled plasma mass spectrometer according to claim 1, characterized in that: The primary filter plate (8), high-efficiency filter plate (9), activated carbon adsorption plate (10), sterilization filter plate (11) and drying plate (12) are all rectangular plates, and the dimensions of the primary filter plate (8), high-efficiency filter plate (9), activated carbon adsorption plate (10), sterilization filter plate (11) and drying plate (12) are matched with the slots (7) one by one.

6. The gas path filtration device for an inductively coupled plasma mass spectrometer according to claim 1, characterized in that: The positioning groove (14) is opened around the lower end of the cover plate (5), and the shape of the positioning groove (14) matches the positioning block (6). The positioning block (6) can be engaged in the positioning groove (14).

7. The gas path filtration device for an inductively coupled plasma mass spectrometer according to claim 1, characterized in that: The snap-fit ​​grooves (13) are evenly distributed along the length direction of the rear end of the cover plate (5), and the number and position of the snap-fit ​​grooves (13) correspond to the slots (7). The snap-fit ​​grooves (13) are all T-shaped.

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