Portable total reflection X-ray fluorescence spectrometer

Abstract

The utility model relates to the technical field of optical detection equipment, in particular to a portable total reflection X-ray fluorescence spectrophotometer which comprises a machine body with a hollow interior and an opening in one side, an objective table and a fixing seat are arranged in the machine body, the objective table comprises an objective plate, a mounting groove is formed in the bottom of the objective plate upwards, and a bottom plate is detachably connected to the opening of the bottom of the objective plate; a top plate used for abutting the slide against the bottom wall of the mounting groove vertically slides in the mounting groove, an elastic piece is supported between the top plate and the bottom plate, and a pressing groove communicated with the mounting groove is downwards formed in the top of the carrying plate. A slot which extends to the outer side wall of the fixed seat and is in plug-in fit with the carrying plate is formed in the fixed seat, and a receding opening for realizing receding when a worker disassembles and assembles the slide is formed in the fixed seat. The objective table fixing structure has the advantage that the stability of the objective table fixing structure is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical detection equipment, in particular to a portable total reflection X-ray fluorescence spectrometer. BACKGROUND

[0002] The total reflection X-ray fluorescence spectrometer (Total Reflection X-Ray Fluorescence Spectrometry, TXRF) is a high-sensitivity trace element analysis technology, which combines the advantages of X-ray fluorescence spectrometry (XRF) and total reflection physical phenomenon. When the device irradiates the sample at a very small incident angle (usually <0.1°), only total reflection occurs on the surface of the sample, penetration of the substrate is avoided, and the scattering background is significantly reduced, thereby improving the sensitivity. The detection limit is as low as ppb level (10⁻ 9 g / cm²), which is suitable for trace analysis.

[0003] Due to the particularity of the TXRF technology, the sample preparation of the sample stage and the measured material is very important, and the core is to form a uniform and ultra-thin sample film, which requires strict control of the cleaning of the substrate, the sample loading amount and the drying conditions. Through reasonable pretreatment (filtration, acidification, dilution) and internal standard calibration, the detection sensitivity and accuracy can be significantly improved.

[0004] The total reflection X-ray fluorescence spectrometer can detect a wide range of fields and can analyze elements of various materials such as powders, liquids and thin films. Due to the diversity of materials, there are different forms such as solid and liquid, which causes the existing total reflection X-ray fluorescence spectrometer to have unstable fixed structure of the sample stage, and the measured sample may slide off, resulting in inaccurate detection data, which has obvious defects. CONTENT OF THE INVENTION

[0005] In order to improve the problem of unstable fixed structure of the existing sample stage, the present application provides a portable total reflection X-ray fluorescence spectrometer.

[0006] The portable total reflection X-ray fluorescence spectrometer provided by the present application adopts the following technical scheme:

[0007] The portable total reflection X-ray fluorescence spectrometer comprises a hollow machine body with an opening on one side, a sample stage and a fixing seat arranged in the machine body, the sample stage comprises a sample plate, an installation groove is opened upward at the bottom of the sample plate, a bottom plate is detachably connected at the opening of the bottom, a top plate for abutting a glass slide against the bottom wall of the installation groove is vertically slid in the installation groove, an elastic piece is top-supported between the top plate and the bottom plate, a pressing groove is formed downward in the top of the sample plate and communicates with the installation groove, an insertion groove extending to the outer side wall of the fixing seat and insertedly matched with the sample plate is formed in the fixing seat, and a gap opening is formed on the fixing seat to avoid the worker when disassembling and assembling the glass slide.

[0008] By adopting the above technical solution, the stage is assembled on the fixed base by interlocking with the slot. When installing the slide, the tester manually presses the top plate down at the pressing slot position, then inserts the slide into the mounting slot. After releasing the top plate, the elastic element pushes the top plate upward to reset and presses the slide against the top wall of the mounting slot. This allows for easy and convenient assembly of slides of different thicknesses, which is suitable for sample analysis tasks with diverse and high-precision requirements. Moreover, the fixed structure is relatively stable, reducing the possibility of the sample slipping.

[0009] Optionally, one side of the slot is closed, and when the carrier plate presses against the closed end of the slot, the pressing groove moves precisely to face the clearance opening.

[0010] By adopting the above technical solution, the contact action between the stage and the closed end of the slot can quickly calibrate and position the pressing groove and the clearance opening.

[0011] Optionally, the carrying plate extends beyond the fixing base, and multiple grooves are arranged on the plate extending beyond the fixing base.

[0012] By adopting the above technical solution, the groove can increase the friction when gripping, thereby avoiding the situation where the surface of the platform is too smooth and it is difficult to pull out the fixed seat.

[0013] Optionally, the fixing seat is provided with a plurality of ball rollers at a position relative to the bottom wall of the slot.

[0014] By adopting the above technical solution, the steel ball roller can reduce the pushing resistance when the inspector inserts the stage into the slot.

[0015] Optionally, the mounting base is provided with a guide ramp on the side opposite the slot opening for guiding the stage into the slot.

[0016] By adopting the above technical solution, the inclined plane facilitates the quick and accurate insertion of the platform into the fixed seat.

[0017] Optionally, the elastic element is a compression spring.

[0018] By adopting the above technical solution, the compression spring deforms when compressed and pushes the top plate to support the glass sheet through the deformation force.

[0019] Optionally, the body is slidably provided with a compartment door for closing its opening, and the compartment door is provided with a handle.

[0020] By adopting the above technical solution, before the formal testing begins, the testing personnel manually pull the door to the opening of the machine body to seal the opening, thereby reducing the possibility of external factors adversely affecting the testing process.

[0021] Optionally, the elastic element is a Z-shaped elastic sheet arranged on the base plate.

[0022] By adopting the above technical solution, the elastic sheet deforms when compressed and pushes the top plate to support the glass sheet through the deformation force.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The stage is assembled on the fixed base by interlocking with the slot. When installing the slide, the tester manually presses the top plate down at the pressing slot, then inserts the slide into the mounting slot. After releasing the top plate, the elastic element pushes the top plate upward to reset and presses the slide against the top wall of the mounting slot. This allows for easy and convenient assembly of slides of different thicknesses, making it suitable for sample analysis tasks with diverse and high-precision requirements. The fixed structure is also relatively stable, reducing the possibility of the sample slipping.

[0025] 2. The contact action between the stage and the closed end of the slot enables rapid calibration and positioning of the pressing groove and the clearance opening. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the body, compartment door, and handle in Embodiment 1 of this application.

[0027] Figure 2 This is a cross-sectional view showing the positional relationship between the loading plate, bottom plate, and top plate in Embodiment 1 of this application.

[0028] Figure 3 This is a cross-sectional view of the connection relationship between the base plate and the elastic sheet in Embodiment 2 of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Machine body; 2. Platform; 21. Carrying plate; 210. Mounting groove; 211. Pressing groove; 212. Groove; 22. Base plate; 23. Top plate; 3. Fixing seat; 31. Slot; 32. Clearance opening; 4. Ball bearing roller; 5. Guide slope; 6. Compression spring; 7. Door; 8. Handle; 9. Elastic sheet; 10. Roller. Detailed Implementation

[0030] The following is in conjunction with the appendix Figures 1-2 This application will be described in further detail.

[0031] This application discloses a portable total reflection X-ray fluorescence spectrometer.

[0032] Reference Figure 1The portable total reflection X-ray fluorescence spectrometer includes a hollow body 1 with an opening on one side. A door 7 for closing the opening is slidably arranged on the body 1. A handle 8 is threaded onto the door 7. During the detection process, the door 7 is in a closed state to reduce the adverse effects of external factors on the detection.

[0033] Reference Figure 1 and Figure 2 A fixed base 3 is bolted inside the body 1. A slot 31 is provided inside the fixed base 3. One side of the slot 31 is closed, and the other side extends to the outer wall of the fixed base 3. The slot 31 is inserted into and fitted with a platform 2.

[0034] Reference Figure 2 The platform 2 extends beyond the fixed base 3. Multiple parallel grooves 212 are provided on the platform 2 extending beyond the fixed base 3. The grooves 212 can increase the friction when gripping, thereby avoiding the situation where the surface of the platform 2 is too smooth and difficult to pull out of the fixed base 3.

[0035] Reference Figure 2 The fixed base 3 is threaded with multiple ball bearing rollers 4 (not shown in the figure) at the position of the bottom wall of the slot 31. The ball bearing rollers 4 have built-in springs, which helps to improve the smoothness of the stage 2 when it is inserted into the slot 31.

[0036] Reference Figure 2 The fixed base 3 is provided with a guide slope 5 on the side opposite the opening of the slot 31. The guide slope 5 is used to guide the stage 2 into the slot 31, which is conducive to the stage 2 being quickly and accurately inserted into the slot 31.

[0037] Reference Figure 2 A roller 10 is also rotatably arranged on the fixed base 3 relative to the opening side of the slot 31. The roller 10 is also used to assist in guiding the platform 2 into the slot 31.

[0038] Reference Figure 2 The platform 2 includes a platform 21. The bottom of the platform 21 has an upward-facing mounting groove 210 and a bottom plate 22 is bolted to the bottom opening. A top plate 23 slides vertically in the mounting groove 210. Multiple elastic elements support the top plate 23 and the bottom plate 22. In this embodiment, the elastic elements are compression springs 6.

[0039] Reference Figure 2 Since the base plate 22 is bolted to the loading plate 21, it is convenient for the testing personnel to replace or clean the elastic components and top plate 23 inside the loading stage 2.

[0040] Reference Figure 2The top of the carrier plate 21 has a pressing groove 211 that communicates with the mounting groove 210. The fixed base 3 has a clearance opening 32 at a position relative to the pressing groove 211. The clearance opening 32 is used for the testing personnel to install and remove the glass slide.

[0041] Reference Figure 2 When installing the glass slide, the inspector manually presses down on the top plate 23. The top plate 23, together with the bottom plate 22, compresses the elastic element. After sufficient distance is created between the top plate 23 and the top wall of the mounting groove 210, the worker inserts the glass slide between the top plate 23 and the top wall of the mounting groove 210.

[0042] The inspector loosens the top plate 23, and the deformation force of the elastic element pushes the top plate 23 to return to its original position. In this way, the top plate 23 pushes the glass slide against the top wall of the mounting groove 210, thereby realizing the assembly of the glass slide on the stage 2.

[0043] Reference Figure 2 When the stage 2 is inserted into the slot 31 and abuts against the closed end of the slot 31, the pressing groove 211 is exactly aligned with the clearance opening 32, thereby realizing the quick positioning of the insertion and engagement between the fixed base 3 and the stage 2.

[0044] The implementation principle of Example 1 is as follows: The stage 2 is assembled on the fixed base 3 by interlocking with the slot 31. When installing the glass slide, the tester manually presses the top plate 23 at the pressing groove 211 position, and then inserts the glass slide into the mounting groove 210. After releasing the top plate 23, the elastic element pushes the top plate 23 upward to reset and presses the glass slide against the top wall of the mounting groove 210. In this way, glass slides of different thicknesses can be easily and conveniently assembled, which is suitable for sample analysis tasks with diverse and high-precision requirements.

[0045] Example 2

[0046] Reference Figure 3 The difference between this embodiment and embodiment 1 is that the elastic element adopts a Z-shaped elastic sheet 9, one side of the elastic sheet 9 is inserted into the bottom plate 22, and the other side is pressed against the bottom of the top plate 23.

[0047] 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 portable total internal reflection X-ray fluorescence spectrometer, comprising a hollow body with an opening on one side (1), characterized in that: The machine body (1) is provided with a platform (2) and a fixed seat (3). The platform (2) includes a platform (21). The bottom of the platform (21) has an upward-facing mounting groove (210) and a bottom plate (22) is detachably connected to the bottom opening. A top plate (23) for pressing the glass slide against the bottom wall of the mounting groove (210) slides vertically in the mounting groove (210). An elastic element supports the top plate (23) and the bottom plate (22). A pressing groove (211) communicating with the mounting groove (210) is provided on the top of the platform (21). The fixed seat (3) has a slot (31) extending to its outer side wall and engaging with the platform (21). The fixed seat (3) has a clearance opening (32) to allow workers to avoid the disassembly and assembly of glass slides.

2. The portable total internal reflection X-ray fluorescence spectrometer according to claim 1, characterized in that: One side of the slot (31) is closed, and when the loading plate (21) presses against the closed end of the slot (31), the pressing groove (211) moves exactly to face the relief opening (32).

3. The portable total internal reflection X-ray fluorescence spectrometer according to claim 1, characterized in that: The carrying plate (21) extends beyond the fixing base (3), and a plurality of grooves (212) are arranged on the plate body extending beyond the fixing base (3).

4. The portable total internal reflection X-ray fluorescence spectrometer according to claim 1, characterized in that: The fixed base (3) is provided with a plurality of steel ball rollers (4) positioned relative to the bottom wall of the slot (31).

5. The portable total internal reflection X-ray fluorescence spectrometer according to claim 1, characterized in that: The fixed base (3) is provided with a guide ramp (5) on the side opposite the opening of the slot (31) for guiding the stage (2) into the slot (31).

6. The portable total internal reflection X-ray fluorescence spectrometer according to claim 1, characterized in that: The elastic element is a compression spring (6).

7. The portable total internal reflection X-ray fluorescence spectrometer according to claim 1, characterized in that: The body (1) is slidably provided with a compartment door (7) for closing its opening, and the compartment door (7) is provided with a handle (8).

8. The portable total internal reflection X-ray fluorescence spectrometer according to claim 1, characterized in that: The elastic element is a Z-shaped elastic sheet (9) arranged on the base plate (22).

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