A sample pretreatment device

Abstract

This utility model provides a sample pretreatment device, including a cylindrical body with a detachable cap installed at the upper end. An exhaust pipe is provided in the upper part of the cylindrical body, and an arc-shaped groove is formed on the outer surface of the cylindrical body. A conical cylinder is installed at the lower end of the cylindrical body, and a conical groove that matches the arc-shaped groove is formed on the outer surface of the conical cylinder. An arc-shaped plate is attached to the surface of the cylindrical body to seal the arc-shaped groove, and a conical plate is attached to the conical cylinder to seal the conical groove. The upper end of the conical plate is connected and fixed to the lower end of the arc-shaped plate. A sealing strip is set inside the structure formed by the arc-shaped plate and the conical plate. This utility model has the following beneficial effects: it completely exposes the inner walls of the cylindrical body and the conical cylinder, making it easy to clean residual particles.

Description

Technical Field

[0001] This utility model is a sample pretreatment device, belonging to the field of aerosol mass spectrometry. Background Technology

[0002] Aerosol mass spectrometry can analyze the chemical composition and particle size distribution of aerosols in real time. When dealing with low-concentration aerosols, a cyclone separator can be used for enrichment sampling. Specifically, the gas stream containing particles enters the separator tangentially through the inlet pipe and is forced into high-speed rotation due to the constraint of the cylinder wall. Since the density of particles in the gas stream is much greater than that of the gas, these particles are thrown towards the cylinder wall under the action of centrifugal force, while the gas flows downward in a spiral along the cylinder wall. This method completes the pretreatment of low-concentration aerosol gas, providing a more easily detectable sample for subsequent analysis.

[0003] However, after enrichment sampling using a cyclone separator, some particles often remain on its inner wall. This is because the main structure of a cyclone separator is usually composed of an upper cylindrical part and a lower conical part, forming a relatively closed cylinder. This structural feature makes cleaning the particles remaining on the inner wall very difficult: the inner wall of the cylindrical part is relatively regular, but due to the closed nature of the cylinder, cleaning tools cannot reach all corners; while the inner wall of the conical part is inclined, and the lower space gradually narrows, further increasing the difficulty of cleaning, especially at the junction of the cone bottom and the discharge port, which is prone to forming cleaning blind spots.

[0004] If these residual particles are not thoroughly removed, they can significantly affect the enrichment sampling of subsequent samples. When a new sample is taken, the residual particles may mix with the newly introduced sample particles, causing sample contamination. This results in the enriched particles being mixed with residual components from the previous sampling, thus interfering with the aerosol mass spectrometer's analytical results. Consequently, the results cannot accurately reflect the true chemical composition and particle size distribution characteristics of the new sample, affecting the accuracy and reliability of the detection. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a sample pretreatment device to solve the problems mentioned in the background technology. This utility model fully exposes the inner walls of the cylinder and the conical cylinder, which facilitates the cleaning of residual particles.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sample pretreatment device, comprising: The cylinder has an open top and a detachable cap installed at the top. An exhaust pipe is located in the upper part of the cylinder, and the upper end of the exhaust pipe passes through the cap and is fixedly connected to it. An air inlet pipe is installed on the upper part of the outer surface of the cylinder, arranged along the tangent of the cylinder. An arc-shaped groove is formed on the outer surface of the cylinder. A conical cylinder is installed at the lower end of the cylinder body, and a conical groove that matches the arc-shaped groove is formed on the outer surface of the conical cylinder; Arc-shaped plates are attached to the surface of the cylinder to seal the arc-shaped grooves; A conical plate is attached to a conical cylinder to seal the conical groove; the upper end of the conical plate is connected and fixed to the lower end of the arc-shaped plate. A sealing strip is installed on the inner side of the structure formed by the arc plate and the conical plate, and the sealing strip is in contact with the surface of the cylinder and the conical cylinder; The limiting component is fitted onto the structure formed by the cylindrical body and the conical cylinder to limit the position of the arc-shaped plate and the conical plate.

[0007] Furthermore, the limiting member includes: A large clamp is fitted onto the structure formed by the arc-shaped plate and the cylinder, and the two ends of the large clamp are connected by bolts; The small clamp is fitted onto the structure formed by the conical plate and the conical cylinder, and the two ends of the small clamp are connected by bolts.

[0008] Furthermore, the large clamp is provided with a first arc-shaped strip on both the upper and lower sides, and the first arc-shaped strip is connected and fixed to the arc-shaped plate. The small clamp is provided with a second arc-shaped strip on both the upper and lower sides, and the second arc-shaped strip is connected and fixed to the conical plate.

[0009] Furthermore, a first arc-shaped pad is provided between the large clamp and the cylinder body. The first arc-shaped pad is sleeved on the cylinder body and bonded to the cylinder body with glue. A second arc-shaped pad is provided between the small clamp and the conical cylinder. The second arc-shaped pad is sleeved on the conical cylinder and bonded to the conical cylinder with glue.

[0010] Furthermore, the inner side of the arc-shaped plate is equipped with an arc-shaped protrusion for insertion into the arc-shaped groove, and the inner side of the conical plate is equipped with a conical protrusion for insertion into the conical groove.

[0011] Furthermore, the thickness of the arc-shaped convex edge is the same as the depth of the arc-shaped groove, and the thickness of the tapered convex edge is the same as the depth of the tapered groove.

[0012] Furthermore, a connecting ring is fitted onto the upper end of the cylinder and fixed to the cylinder body, and the cylinder cover is connected to the connecting ring by multiple sets of bolts.

[0013] Furthermore, multiple positioning seats are evenly installed on the upper part of the outer surface of the cylinder, and fixing holes are opened on the upper surface of the horizontal part of the positioning seats.

[0014] The beneficial effects of this utility model are: 1. Arc-shaped grooves and conical grooves are respectively cut into the surfaces of the cylindrical body and the conical cylinder. Matching arc-shaped plates and conical plates are fitted and covered by sealing strips to form a sealed, separate space. When cleaning is required, the arc-shaped plates and conical plates are removed as a whole, completely exposing the inner walls of the cylindrical body and the conical cylinder. At this point, cleaning tools can directly access the previously hard-to-reach cylindrical inner walls, conical inclined surfaces, and the junctions between them, thoroughly removing residual particles and avoiding interference from previous sampling residues on subsequent enrichment, thus ensuring sample purity.

[0015] 2. The arc-shaped and conical grooves cover the cleaning difficulties of traditional separators. Combined with the structure of the arc-shaped and conical convex plates, they do not affect the airflow rotation path during separation, and the entire inner wall is visible during cleaning, thus solving the problem of cleaning dead corners caused by the sealed cylinder structure. Attached Figure Description

[0016] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the sample pretreatment device of this utility model; Figure 2 This is another perspective view of a sample pretreatment device according to the present invention; Figure 3 This is a schematic diagram of the assembly of the conical cylinder, cylinder cover, and cylinder body in a sample pretreatment device according to the present invention; Figure 4 This is a schematic diagram of the assembly of the sealing strip, conical plate and arc plate in a sample pretreatment device of this utility model; In the picture: 1. Cylinder body; 11. Connecting ring; 12. Cylinder cover; 13. Exhaust pipe; 14. Inlet pipe; 15. Positioning seat; 2. Conical cylinder; 3. Conical plate; 31. Second arc-shaped strip; 32. Conical protrusion; 4. Small clamp; 41. Second arc-shaped pad; 5. Curved plate; 51. Second curved strip; 42. Curved protrusion; 6. Large clamp; 61. Second arc-shaped pad; 7. Sealing strip. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] Please see Figures 1-3This utility model provides a technical solution: a sample pretreatment device, including a cylinder 1, the upper and lower ends of which are open. A detachable cylinder cover 12 is installed on the upper end of the cylinder 1. A connecting ring 11 is fitted on the upper end of the cylinder 1 and fixed to the cylinder 1. The cylinder cover 12 is connected to the connecting ring 11 by multiple sets of bolts. An exhaust pipe 13 is provided in the upper part of the cylinder 1. The upper end of the exhaust pipe 13 passes through the cylinder cover 12 and is fixed to the cylinder cover 12. An air inlet pipe 14 is installed on the upper part of the outer surface of the cylinder 1, arranged along the tangent direction of the cylinder 1. Multiple positioning seats 15 are evenly installed on the upper part of the outer surface of the cylinder 1. The upper surface of the horizontal part of the positioning seat 15 is provided with a fixing hole. The positioning seat 15 is installed at the required position by bolts to complete the restriction of the position of the cylinder 1.

[0019] See Figures 1-4 The outer surface of the cylinder 1 is provided with an arc-shaped groove. The conical cylinder 2 is installed at the lower end of the cylinder 1. The outer surface of the conical cylinder 2 is provided with a conical groove that matches the arc-shaped groove. The arc-shaped plate 5 is attached to the surface of the cylinder 1 to seal the arc-shaped groove. The conical plate 3 is attached to the conical cylinder 2 to seal the conical groove. The upper end of the conical plate 3 is connected and fixed to the lower end of the arc-shaped plate 5. The sealing strip 7 is set inside the structure formed by the arc-shaped plate 5 and the conical plate 3. The sealing strip 7 is attached to the surface of the cylinder 1 and the conical cylinder 2. The surfaces of the cylinder 1 and the conical cylinder 2 are respectively provided with arc-shaped grooves and conical grooves. The matching arc-shaped plate 5 and conical plate 3 are tightly attached to the groove openings formed by the arc-shaped grooves and conical grooves through the sealing strip 7, together forming a sealed separation space to ensure that the airflow flows along the preset path during the separation process.

[0020] When cleaning is required, simply disassemble the arc-shaped plate 5 and the conical plate 3 as a whole, and the inner walls of the cylinder 1 and the conical cylinder 2 will be fully exposed. At this time, the cleaning tool can directly reach the cylindrical inner wall, the conical inclined surface, and the joint between the two, which were previously difficult to clean, thereby thoroughly removing residual particles and effectively avoiding interference from the residual substances of the previous sampling in the subsequent enrichment process, ensuring the purity of the sample.

[0021] See Figures 1-4The large clamp 6 is fitted onto the structure formed by the arc plate 5 and the cylinder 1. The two ends of the large clamp 6 are connected by bolts. First arc-shaped strips 51 are provided on both the upper and lower sides of the large clamp 6. The first arc-shaped strips 51 are connected and fixed to the arc plate 5. A first arc-shaped pad 61 is provided between the large clamp 6 and the cylinder 1. The first arc-shaped pad 61 is fitted onto the cylinder 1 and adhered to the cylinder 1 with glue. The first arc-shaped pad 61 and the first arc-shaped strip 51 cooperate with each other to achieve stable installation of the large clamp 6. The clamp 4 is fitted onto the structure formed by the conical plate 3 and the conical cylinder 2. The two ends of the small clamp 4 are connected by bolts. The small clamp 4 has a second arc-shaped strip 31 on both the upper and lower sides. The second arc-shaped strip 31 is connected and fixed to the conical plate 3. A second arc-shaped pad 41 is provided between the small clamp 4 and the conical cylinder 2. The second arc-shaped pad 41 is fitted onto the conical cylinder 2 and is glued to the conical cylinder 2. The second arc-shaped pad 41 and the second arc-shaped strip 31 cooperate with each other to achieve stable installation of the small clamp 4.

[0022] See Figures 1-4 The inner surface of the arc-shaped plate 5 is equipped with an arc-shaped protrusion 52 for insertion into the arc-shaped groove, and the inner surface of the conical plate 3 is equipped with a conical protrusion 32 for insertion into the conical groove. The thickness of the arc-shaped protrusion 52 is the same as the depth of the arc-shaped groove, and the thickness of the conical protrusion 32 is the same as the depth of the conical groove. The arc-shaped groove and the conical groove cover the areas that are difficult to clean in traditional separators. With the structural design of the arc-shaped protrusion 52 embedded in the arc-shaped groove and the conical protrusion 32 embedded in the conical groove, it can ensure that the airflow rotates stably along the original path during the airflow separation process, without interfering with the separation effect. When cleaning is required, after removing the arc-shaped plate 5 and the conical plate 3, the inner walls of the cylinder 1 and the conical cylinder 2 can be completely exposed, making the entire inner wall visible, successfully solving the cleaning dead corner problem caused by the traditional sealed cylinder 1 structure.

[0023] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sample pre-treatment device, characterized by, include: The cylinder (1) has an open top and a detachable cap (12) installed on the top of the cylinder (1). An exhaust pipe (13) is provided in the upper part of the cylinder (1). The upper end of the exhaust pipe (13) passes through the cap (12) and is connected and fixed to the cap (12). An air inlet pipe (14) arranged along the tangent of the cylinder (1) is installed in the upper part of the outer surface of the cylinder (1). An arc groove is opened on the outer surface of the cylinder (1). A conical cylinder (2) is installed at the lower end of the cylinder body (1), and a conical groove that matches the arc groove is opened on the outer surface of the conical cylinder (2); An arc-shaped plate (5) is attached to the surface of the cylinder (1) to seal the arc-shaped groove; A conical plate (3) is attached to a conical cylinder (2) to seal the conical groove. The upper end of the conical plate (3) is connected and fixed to the lower end of the arc plate (5). A sealing strip (7) is set inside the structure formed by the arc plate (5) and the conical plate (3), and the sealing strip (7) is in contact with the surface of the cylinder (1) and the conical cylinder (2); The limiting component is fitted onto the structure formed by the cylinder (1) and the conical cylinder (2) to limit the position of the arc plate (5) and the conical plate (3).

2. The sample preparation device of claim 1, wherein: The limiting component includes: A large clamp (6) is fitted onto the structure formed by the arc plate (5) and the cylinder (1), and the two ends of the large clamp (6) are connected by bolts; Small clamps (4) are fitted onto the structure formed by the conical plate (3) and the conical cylinder (2), and the two ends of the small clamps (4) are connected by bolts.

3. A sample preparation device according to claim 2, characterised in that: The large clamp (6) is provided with a first arc strip (51) on both the upper and lower sides. The first arc strip (51) is connected and fixed to the arc plate (5). The small clamp (4) is provided with a second arc strip (31) on both the upper and lower sides. The second arc strip (31) is connected and fixed to the conical plate (3).

4. A sample preparation device according to claim 3, characterised in that: A first arc-shaped pad (61) is provided between the large clamp (6) and the cylinder (1). The first arc-shaped pad (61) is sleeved on the cylinder (1) and glued to the cylinder (1). A second arc-shaped pad (41) is provided between the small clamp (4) and the conical cylinder (2). The second arc-shaped pad (41) is sleeved on the conical cylinder (2) and glued to the conical cylinder (2).

5. The sample preparation device of claim 1, wherein: The inner side of the arc plate (5) is equipped with an arc-shaped protrusion (52) for insertion into the arc groove, and the inner side of the conical plate (3) is equipped with a conical protrusion (32) for insertion into the conical groove.

6. A sample preparation device according to claim 5, characterised in that: The thickness of the arc-shaped convex plate (52) is the same as the depth of the arc-shaped groove, and the thickness of the conical convex plate (32) is the same as the depth of the conical groove.

7. The sample preparation device of claim 1, wherein: The upper end of the cylinder (1) is fitted with a connecting ring (11) that is fixed to the cylinder (1), and the cylinder cover (12) is connected to the connecting ring (11) by multiple sets of bolts.

8. The sample preparation device of claim 1, wherein: Multiple positioning seats (15) are evenly installed on the upper part of the outer surface of the cylinder (1), and a fixing hole is provided on the upper surface of the horizontal part of the positioning seat (15).

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