Three-way filtering device of inductively coupled plasma mass spectrometer

Abstract

The utility model discloses a three-way filtering device of an inductively coupled plasma mass spectrometer, which relates to the technical field of analytical instruments and comprises a buffer block, a rotating ring and a filter element, a buffer cavity is arranged in the buffer block, the rotating ring is rotatably arranged in the buffer cavity of the buffer block, and the projection of the rotating ring along the flowing direction of liquid in the buffer block covers the section of the buffer cavity. A plurality of inclined through grooves are formed in the circumferential side of the rotating ring at intervals, the through grooves penetrate through the inner side wall of the rotating ring, the fixing ring is arranged in the buffering cavity of the buffering block and located in the rotating ring, a water inlet in butt joint with the rotating through grooves is formed in the side wall of the fixing ring, and a water outlet hole is formed in the top of the fixing ring. By arranging the rotatable rotating ring, liquid enters the filtering cavity only when the liquid and the rotating ring are aligned, and stops flowing when the liquid and the rotating ring are not aligned, so that a temporary static liquid area is formed in the rotating ring, the impurity removal capacity before filtering is effectively improved, and large-particle impurities are prevented from entering a subsequent channel.

Description

Technical Field

[0001] This utility model relates to the field of analytical instrument technology, specifically to a three-pass filtration device for an inductively coupled plasma mass spectrometer. Background Technology

[0002] In high-precision analytical equipment such as ICP-MS (inductively coupled plasma mass spectrometer), liquid samples usually need to be filtered before entering the analysis module to remove particulate impurities and ensure the stability of the detection signal and the smooth flow of the analysis channel.

[0003] Existing filtration devices mostly use continuous flow for liquid filtration. Although this can block impurities to a certain extent, the constant liquid flow rate and stable flow state make it difficult for impurities to settle effectively during the flow. Some particles may even enter the subsequent analysis module with the liquid flow, causing blockage or signal interference. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a three-pass filtration device for an inductively coupled plasma mass spectrometer.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A three-pass filter device for an inductively coupled plasma mass spectrometer includes:

[0007] A buffer block, which has a buffer cavity inside;

[0008] A rotating ring is rotatably disposed within the buffer cavity of the buffer block. The projection of the rotating ring along the direction of liquid flow within the buffer block covers the cross section of the buffer cavity. Several inclined through grooves are spaced apart on the periphery of the rotating ring, and the through grooves penetrate the inner wall of the rotating ring.

[0009] A fixed ring is disposed in the buffer cavity of the buffer block and located inside the rotating ring. The side wall of the fixed ring is provided with a water inlet that connects with the rotating through groove, and the top of the fixed ring is provided with a water outlet.

[0010] When the rotating ring rotates under the action of liquid flow until the through groove and the inlet are aligned, the liquid enters the inside of the fixed ring, and the filtered liquid flows out through the inlet at the top of the fixed ring.

[0011] When the rotating ring rotates to the point where the through-channel and the inlet are not aligned, the liquid inside the rotating ring stops flowing and impurities settle.

[0012] Preferably, the vertical height of the water inlet is located above the vertical height of the fixing ring axis.

[0013] Preferably, when the water inlet is aligned with the through groove, the two sides of the water inlet are tangent to the two sides of the through groove.

[0014] Preferably, the buffer block has stacking blocks on both sides that communicate with the internal space of the fixed ring, and the stacking blocks are used to collect impurities filtered by the fixed ring.

[0015] Preferably, the bottom of the buffer block has a sample inlet tube, and the top of the buffer block is connected to a filter via an outlet tube.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. By setting a rotatable rotating ring, combined with the inclined through groove on its periphery and the water inlet on the side wall of the fixed ring to form an intermittent docking structure, the liquid enters the filtration chamber only when the two are aligned. When they are not aligned, the liquid flow stops, thus forming a temporarily stagnant liquid zone inside the rotating ring. This causes particulate impurities to settle due to gravity, effectively improving the impurity removal capacity before filtration and reducing the entry of large particulate impurities into subsequent channels.

[0018] 2. By using liquid flow to drive the rotating ring, the device can achieve intermittent flow control without additional power components. Its simple structure and high reliability make it particularly suitable for use in ICP-MS instruments sensitive to electromagnetic interference. Furthermore, this self-driven design helps reduce equipment size and energy consumption, while improving system integration and overall stability. Attached Figure Description

[0019] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0020] Figure 1 This is a schematic diagram of the three-pass filter device of this inductively coupled plasma mass spectrometer;

[0021] Figure 2 for Figure 1 A structural diagram from a second perspective;

[0022] Figure 3 for Figure 2 A schematic diagram of the internal structure of the buffer block;

[0023] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0024] Explanation of annotations in the diagram:

[0025] 1. Buffer block; 11. Sample inlet tube; 12. Stacking block;

[0026] 2. Rotating ring; 21. Through groove;

[0027] 3. Fixing ring; 31. Water inlet; 32. Water outlet;

[0028] 4. Filter. Detailed Implementation

[0029] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0030] Example

[0031] like Figures 1-4 As shown, a three-stage filtration device for an inductively coupled plasma mass spectrometer includes a buffer block 1, a rotating ring 2, and a fixed ring 3. The buffer block 1 has a buffer chamber inside for liquid introduction and turbulence buffering. A sample inlet tube 11 is located at the bottom of the buffer block 1 for connection to an external sample passage, allowing the sample liquid to be introduced into the buffer chamber from the bottom. A filter 4 is connected to the top of the buffer block 1, which performs secondary fine filtration on the liquid after passing through the device, thereby improving the purity of the filtrate. This staged filtration path reduces the burden on individual stages and improves the overall service life and effectiveness of the filtration system.

[0032] In one embodiment, such as Figures 3-4 As shown, the rotating ring 2 is rotatably disposed within the buffer cavity of the buffer block 1. The projection of the rotating ring 2 along the liquid flow direction within the buffer block 1 covers the cross-section of the buffer cavity, thereby ensuring that the liquid cannot bypass the rotating ring 2 and rise directly within the buffer cavity. Several inclined through grooves 21 are spaced apart on the circumference of the rotating ring 2. The through grooves 21 penetrate the inner wall of the rotating ring 2 and extend from the outer side of the rotating ring 2 to the inner wall, arranged at an oblique angle, forming a conductive structure that can deflect the flow direction of the liquid.

[0033] In one embodiment, such as Figures 3-4 As shown, the fixed ring 3 is set in the buffer cavity of the buffer block 1, located inside the rotating ring 2, and coaxially arranged with it. The side wall of the fixed ring 3 has an inlet 31 that connects with the rotating through groove 21, and the top of the fixed ring 3 has an outlet 32 ​​for discharging the filtered clean liquid.

[0034] After the liquid is introduced through the sample inlet tube 11, it rises axially into the buffer chamber, pushing the rotating ring 2 to rotate during the ascent. As the rotation continues, part of the through groove 21 periodically aligns with the inlet 31, forming an intermittent channel structure. The liquid enters the fixed ring 3 in the aligned state. When the rotating ring 2 rotates to the point where the through groove 21 and the inlet 31 are not aligned, the liquid inside the rotating ring 2 stops flowing, impurities settle under gravity, and pure liquid is discharged from the outlet hole 32 at the top of the fixed ring 3, entering the subsequent filter 4 to complete the final sample preparation.

[0035] In one embodiment, such as Figures 3-4 As shown, the vertical height of the inlet 31 is above the vertical height of the axis of the fixed ring 3, which means that after the liquid enters the fixed ring 3, its upward path needs to overcome a certain height difference, which increases the settling path of impurities in the bottom area of ​​the fixed ring 3, which is conducive to the deposition of large particles of impurities; it prevents the liquid from rushing upward directly after entering, increases the filtration retention time, and enhances the filtration effect; together with the liquid disturbance below the rotating ring 2, it can increase the local turbulence intensity of the liquid, promote sedimentation separation and slow release flow.

[0036] In one embodiment, such as Figures 3-4 As shown, when the inlet 31 is aligned with the through groove 21, the two sides of the inlet 31 are tangent to the two sides of the through groove 21, which avoids the gap between the inlet 31 and the through groove 21 that would allow impurities to pass directly through, thus ensuring the particle interception function; it also facilitates the realization of the filtration rhythm of "intermittent inflow + sedimentation when not aligned".

[0037] In one embodiment, such as Figures 3-4 As shown, the buffer block 1 has stacking blocks 12 on both sides that communicate with the internal space of the fixed ring 3. The stacking blocks 12 are used to collect impurities filtered by the fixed ring 3. After the impurities are deposited in the stacking blocks 12, they are prevented from being resuspended, thus improving the stability of the clear liquid. The whole machine maintenance can be achieved by regularly cleaning the stacking blocks 12 instead of frequently replacing the filter elements.

[0038] During the liquid flow process, the rotation of the rotating ring 2 is used to achieve the periodic switching between flow on and off. When the through groove 21 on the rotating ring 2 is aligned with the inlet 31 on the fixed ring 3, the liquid enters the interior of the fixed ring 3 and rises to the top for discharge; when the two are not aligned, the liquid flow is cut off, and a relatively static area is formed inside the rotating ring 2. During this stage, impurities settle downwards due to gravity, effectively achieving pre-separation before filtration.

[0039] This structure ingeniously integrates filtration with a hydrodynamic structure without the need for additional control components. It achieves mechanical action through fluid drive, and the mechanical structure in turn regulates the flow of fluid, forming a feedback-based adaptive filtration system.

[0040] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A three-pass filter device for an inductively coupled plasma mass spectrometer, characterized in that, include: Buffer block (1), which has a buffer cavity inside; A rotating ring (2) is rotatably disposed in the buffer cavity of the buffer block (1). The projection of the rotating ring (2) along the liquid flow direction in the buffer block (1) covers the cross section of the buffer cavity. Several inclined through grooves (21) are spaced apart on the periphery of the rotating ring (2). The through grooves (21) penetrate the inner wall of the rotating ring (2). The fixed ring (3) is set in the buffer cavity of the buffer block (1) and located inside the rotating ring (2). The side wall of the fixed ring (3) is provided with an inlet (31) that connects with the rotating through groove (21). The top of the fixed ring (3) is provided with an outlet (32). When the rotating ring (2) rotates under the action of liquid flow until the through groove (21) and the inlet (31) are aligned, the liquid enters the interior of the fixed ring (3), and the filtered liquid flows out through the inlet (31) at the top of the fixed ring (3). When the rotating ring (2) rotates to the point where the through groove (21) and the inlet (31) are not aligned, the liquid inside the rotating ring (2) stops flowing and impurities settle.

2. The three-pass filtration device for an inductively coupled plasma mass spectrometer according to claim 1, characterized in that: The vertical height of the inlet (31) is above the vertical height of the axis of the fixing ring (3).

3. The three-pass filter device for an inductively coupled plasma mass spectrometer according to claim 2, characterized in that: When the inlet (31) is aligned with the through groove (21), the two sides of the inlet (31) are tangent to the two sides of the through groove (21).

4. The three-pass filtration device for an inductively coupled plasma mass spectrometer according to claim 1, characterized in that: The buffer block (1) has stacking blocks (12) on both sides that communicate with the internal space of the fixing ring (3), and the stacking blocks (12) are used to collect impurities filtered by the fixing ring (3).

5. The three-pass filter device for an inductively coupled plasma mass spectrometer according to claim 1, characterized in that: The buffer block (1) has an inlet tube (11) at the bottom and a filter (4) at the top of the buffer block (1) via an outlet tube.

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