Large-size laser ablation bin

Abstract

The utility model discloses a large-size laser ablation bin which comprises a shell, a sample placing area is arranged on the bottom surface of the inner wall of the shell, the large-size laser ablation bin further comprises a sealing cover, the sealing cover is installed on the upper surface of the shell in a sealing mode, and the sealing cover is connected with an air inlet and outlet control structure. The gas inlet and outlet control structure can enable aerosol, denudated by carrier gas through the denudation window, to be brought into the gas outlet pipe through the gas inlet pipe, the gas inlet and outlet control structure comprises the denudation window, the denudation window is installed on the upper surface of a sealing cover in a penetrating mode, the gas outlet pipe is arranged on an interlayer of the sealing cover, and one end of the gas outlet pipe is connected in an integrated mode. The large-size laser ablation bin is provided with a gas inlet and outlet control structure, internal redundant air can be exhausted through an exhaust pipe, a gas inlet pipe enables carrier gas to pass through an ablation window to drive aerosol to reach a gas outlet pipe, a sealing structure is arranged, a sealing cover seals a shell through bolts, and sealing protruding strips are in butt joint with butt joint grooves, so that the sealing performance is better.

Description

Technical Field

[0001] The utility model relates to the technical field of laser ablation chambers, in particular to a large-size laser ablation chamber. Background Art

[0002] Laser ablation-inductively coupled plasma mass spectrometry is a commonly used micro-area in-situ major and trace element analysis technology. The ablation beam spot can reach the micron level, which can directly ablate solid samples and realize non-destructive testing. Therefore, it is widely used. The laser ablation device and the inductively coupled plasma mass spectrometry are two independent devices. The laser ablation device is responsible for ablation and collection of solid samples to vaporize them into aerosols; the inductively coupled plasma mass spectrometry is responsible for analyzing and detecting the components in the aerosols. The two devices are connected by a set of connecting pipelines. The ablation chamber is an important component of the connecting pipeline. The solid samples are placed in the sample chamber and ablated and vaporized by the laser.

[0003] The maximum sample size that a commonly used laser ablation chamber can accommodate is the universal standard piece size. Due to the size limitation of the sample chamber, some larger samples, such as ancient jade, ancient pottery fragments and other precious and indestructible samples, cannot be tested. Utility Model Content

[0004] The purpose of the utility model is to provide a large-sized laser ablation chamber to solve the problem in the above-mentioned background technology that large-sized samples that cannot be destroyed cannot be tested.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a large-size laser ablation chamber, comprising an outer shell, the bottom surface of the inner wall of the outer shell is provided with a sample placement area, and also comprises a sealing cover, the sealing cover is sealingly installed on the upper surface of the outer shell, the sealing cover is connected to an inlet and outlet air control structure, and the inlet and outlet air control structure can allow the carrier gas to pass through the aerosol ablated by the ablation window and bring it into the outlet pipe through the inlet pipe.

[0006] Preferably, the air inlet and outlet control structure includes an erosion window, which is installed through the upper surface of the sealing cover, the interlayer of the sealing cover is provided with an air outlet pipe, one end of the air outlet pipe is collectively connected, the lower surface of the sealing cover is provided with a circular groove, the middle of the circular groove is provided with an erosion window, the other end of the air outlet pipe penetrates the groove on the lower surface of the sealing cover, the other side of the circular groove on the lower surface of the sealing cover is connected with an air inlet pipe, the branch pipe of the air inlet pipe is connected with an exhaust port, and the exhaust port penetrates the side surface of the sealing cover.

[0007] By adopting the above technical solution, after the sample is eroded through the erosion window, the aerosol generated by the sample will enter the exhaust pipe.

[0008] Preferably, the air outlet pipe and the air inlet pipe are configured as a tube bundle structure.

[0009] With the above technical solution, it is convenient for the carrier gas to flow.

[0010] Preferably, a threaded hole is penetrated through the upper surface of the sealing cover, and a bolt is threadedly connected to the threaded hole.

[0011] With the above technical solution, the sealing cover is connected to the outer shell by bolts.

[0012] Preferably, the sealing cover is provided with a sealing structure, and the sealing structure is hermetically connected to the docking groove through a sealing rib so that the sealing cover seals the outer shell.

[0013] With the above technical solution, the sealing rib makes the sealing tighter.

[0014] Preferably, the sealing structure includes a limiting block, the limiting block is installed on the lower surface of the sealing cover, a sealing block is arranged on the inner wall surface of the limiting block, the distance between the sealing blocks corresponds to the thickness of the shell of the outer shell, a docking groove is arranged at the upper end of the outer shell, the docking groove is arranged in a semi-circular arc structure, a sealing rib is installed on the lower surface of the sealing cover between the sealing blocks, and the position of the sealing rib corresponds to the docking groove.

[0015] With the above technical solution, the docking groove and the sealing rib are docked through the limiting block, and the sealing performance is better.

[0016] Preferably, the limiting block is arranged in a square annular structure.

[0017] With the above technical solution, it corresponds to the upper end of the outer shell.

[0018] Compared with the prior art, the beneficial effects of the present utility model are: this large-size laser ablation chamber:

[0019] 1. This large-size laser ablation chamber is provided with an air inlet and outlet control structure. A sample placement area is arranged inside the outer shell, and the maximum sample size that can be placed in the sample placement area is 222mm×150mm×25mm, so that some larger-size samples can be tested without damaging the samples;

[0020] 2. Further, the carrier gas flows to the ablation window through the inlet pipe, and the sample aerosol ablated by the ablation window reaches the outlet pipe through the branched pipe bundle-shaped air outlet holes, and then the aerosol is brought into the inductively coupled plasma mass spectrometry for detection. The gas path is arranged on the sealing cover, which is convenient for expanding the sample area;

[0021] 3. Further, the sealing cover is connected to the outer shell by bolts, and the sealing rib and the docking groove are docked through the limiting block, so that the sealing rib makes the sealing between the sealing cover and the outer shell better. Description of the Drawings

[0022] Figure 1 This is a schematic diagram of the shaft side surface structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the front section structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model from top view;

[0025] Figure 4 This is a schematic diagram of the structure of the sealing cover of the utility model when viewed from above;

[0026] Figure 5 It is a schematic diagram of the cross-sectional structure of the sealing cover of the utility model when viewed from above.

[0027] In the figure: 1. outer shell; 2. sample placement area; 3. sealing cover; 4. erosion window; 5. air outlet pipe; 6. air inlet pipe; 7. exhaust port; 8. bolt; 9. limit block; 10. sealing block; 11. sealing convex strip; 12. docking groove. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figures 1-5 The utility model provides a technical solution: a large-size laser ablation chamber, including a shell 1, a sample placement area 2, a sealing cover 3, an ablation window 4, an air outlet pipe 5, an air inlet pipe 6, an exhaust port 7, a bolt 8, a limit block 9, a sealing block 10, a sealing convex strip 11, and a docking groove 12.

[0030] Example 1

[0031] The large-sized laser ablation chamber is provided with an inlet and outlet air control structure, through which the aerosol generated by the sample in the large-sized ablation chamber is brought into the outlet pipe 5 for subsequent detection, specifically:

[0032] The inner wall bottom surface of the outer shell 1 is provided with a sample placement area 2, and further includes a sealing cover 3. The sealing cover 3 is sealingly installed on the upper surface of the outer shell 1. The sealing cover 3 is connected with an air inlet and outlet control structure. The air inlet and outlet control structure can bring the aerosol eroded by the carrier gas through the erosion window 4 into the outlet pipe 5 through the inlet pipe 6. The air inlet and outlet control structure includes an erosion window 4. The erosion window 4 is installed through the upper surface of the sealing cover 3. A sandwich layer of the sealing cover 3 is provided with an outlet pipe 5. One end of the outlet pipe 5 is integrally connected. The lower surface of the sealing cover 3 is provided with an annular slot. The erosion window 4 is arranged in the middle of the annular slot. The other end of the outlet pipe 5 penetrates through the slot on the lower surface of the sealing cover 3. The other side of the annular slot on the lower surface of the sealing cover 3 is connected through with an inlet pipe 6. A branch pipe of the inlet pipe 6 is connected with an exhaust port 7. The exhaust port 7 penetrates through the side surface of the sealing cover 3. The outlet pipe 5 and the inlet pipe 6 are arranged in a tube bundle structure. The upper surface of the sealing cover 3 is provided with a threaded hole through which a bolt 8 is threadedly connected;

[0033] The inner wall bottom surface of the outer shell 1 of the large-size laser ablation chamber is provided with a sample placement area 2. The sample placement area 2 is set to be able to place samples with a maximum sample size of 222 mm × 150 mm × 25 mm. After the sample is placed in the sample placement area 2 of the outer shell 1, as Figure 5 shown, the exhaust port 7 is connected with a branch pipe of the inlet pipe 6, so that the exhaust device connected to the exhaust port 7 is opened, and the excess air in the outer shell 1 is discharged. When eroding the material sample, the laser beam formed by the laser passes through the erosion window 4 to erode the sample. Then, the sample erosion will generate aerosol. At this time, as Figure 5 shown, the gas cylinder connected to the inlet pipe 6 will make the carrier gas reach the middle of the annular slot around the erosion window 4 position through the tube bundle-shaped air holes of the branch pipe. At the same time, the tube bundle-shaped air holes of the branch pipe connected to the outlet pipe 5 bring the eroded aerosol into the inductively coupled plasma mass spectrometry for detection through the inductively coupled plasma mass spectrometry. The gas path of the large-size laser ablation chamber is arranged on the sealing cover 3, which can expand the position of the sample placement area 2 and enable more large-size solid samples to be detected without damage.

[0034] Embodiment 2

[0035] The large-size laser ablation chamber is further provided with a sealing structure, which can make the ablation chamber outer shell 1 and the sealing cover 3 be sealingly connected. Specifically:

[0036] The sealing cover 3 is provided with a sealing structure. The sealing structure is hermetically connected to the docking groove 12 through the sealing rib 11, so that the sealing cover 3 seals the outer shell 1. The sealing structure includes a limiting block 9. The limiting block 9 is installed on the lower surface of the sealing cover 3. A sealing block 10 is arranged on the inner wall surface of the limiting block 9. The distance between the sealing blocks 10 corresponds to the thickness of the shell of the outer shell 1. The upper end of the outer shell 1 is provided with a docking groove 12. The docking groove 12 is arranged in a semi-circular arc structure. A sealing rib 11 is installed on the lower surface of the sealing cover 3 between the sealing blocks 10. The position of the sealing rib 11 corresponds to that of the docking groove 12. The limiting block 9 is arranged in a square ring structure;

[0037] As Figure 2 shown, when closing the sealing cover 3, the sealing cover 3 is connected to the outer shell 1 through the bolt 8. The gap between the limiting blocks 9 on the lower surface of the sealing cover 3 is docked with the upper end of the outer shell 1, so that the sealing block 10 arranged on the inner wall surface of the limiting block 9 forms a seal with the surface of the outer shell 1. At the same time, the sealing rib 11 located between the sealing blocks 10 will be docked with the docking groove 12 arranged at the upper end of the outer shell 1. The docking groove 12 and the sealing rib 11 are arranged in a semi-circular arc structure, so that the sealing between the sealing cover 3 and the outer shell 1 is further enhanced, which is convenient for subsequent sample ablation inside the outer shell 1.

[0038] Working principle: When using this large-size laser ablation chamber, an air inlet and outlet control structure is provided, which can enable the inlet pipe 6 to drive the aerosol to reach the outlet pipe 5 through the ablation window 4 with the carrier gas. The sealing structure is docked with the docking groove 12 through the sealing rib 11, so that the outer shell 1 is sealed, increasing the overall practicability.

[0039] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large-size laser ablation chamber, comprising a housing (1), wherein the inner wall bottom surface of the housing (1) is provided with a sample placement area (2), characterized in that: The invention also comprises a sealing cover (3), wherein the sealing cover (3) is sealingly mounted on the upper surface of the housing (1), and the sealing cover (3) is connected to an air inlet and outlet control structure, wherein the air inlet and outlet control structure can allow the carrier gas to pass through the air inlet pipe (6) and carry the aerosol eroded by the erosion window (4) into the air outlet pipe (5).

2. The large-size laser ablation chamber according to claim 1, characterized in that: The air inlet and outlet control structure comprises an erosion window (4), the erosion window (4) is installed through the upper surface of the sealing cover (3), the interlayer of the sealing cover (3) is provided with an air outlet pipe (5), one end of the air outlet pipe (5) is collectively connected, the lower surface of the sealing cover (3) is provided with an annular groove, the middle of the annular groove is provided with the erosion window (4), the other end of the air outlet pipe (5) penetrates the groove on the lower surface of the sealing cover (3), the other side of the annular groove on the lower surface of the sealing cover (3) is connected through the air inlet pipe (6), the branch pipe of the air inlet pipe (6) is connected with an exhaust port (7), and the exhaust port (7) penetrates the side surface of the sealing cover (3).

3. The large-size laser ablation chamber according to claim 2, characterized in that: The air outlet pipe (5) and the air inlet pipe (6) are arranged as a tube bundle structure.

4. The large-size laser ablation chamber according to claim 2, characterized in that: A threaded hole is provided through the upper surface of the sealing cover (3), and a bolt (8) is threadedly connected to the threaded hole.

5. The large-size laser ablation chamber according to claim 2, characterized in that: The sealing cover (3) is provided with a sealing structure, and the sealing structure is sealedly connected with the docking groove (12) through the sealing convex strip (11) so that the sealing cover (3) seals the housing (1).

6. The large-size laser ablation chamber according to claim 5, characterized in that: The sealing structure comprises a limit block (9), the limit block (9) being mounted on the lower surface of the sealing cover (3), a sealing block (10) being arranged on the inner wall surface of the limit block (9), the distance between the sealing blocks (10) corresponding to the shell thickness of the outer shell (1), a docking groove (12) being arranged at the upper end of the outer shell (1), the docking groove (12) being arranged in a semicircular arc structure, and a sealing convex strip (11) being arranged on the lower surface of the sealing cover (3) between the sealing blocks (10), the sealing convex strip (11) corresponding to the position of the docking groove (12).

7. The large-size laser ablation chamber according to claim 6, characterized in that: The limiting block (9) is configured as a square ring structure.

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