A sample fixing device for a down irradiation type X-ray fluorescence spectrometer
By designing a sample fixing device that includes a base, a V-shaped slider, and a spring stop, the problem of accurately centering the sample is solved, achieving precise sample fixing and data accuracy. It is applicable to most X-ray fluorescence spectrometers.
Patent Information
- Application Number
- CN202522031604.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-22
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-22
AI Technical Summary
In X-ray fluorescence spectroscopy, it is difficult to accurately center and fix the sample, resulting in an uneven test surface or insufficient area, which leads to deviations in the test data.
Design a sample fixing device including a base, a reference plane, a V-shaped slider, a spring stop, and a lead screw. The height can be adjusted by rotating the lead screw and the sample can be fixed by the spring. It is suitable for cylindrical or cuboid samples of different sizes.
It achieves precise centering and fixation of the sample, reduces the deviation of detection data, is simple to operate and highly applicable, and is suitable for most X-ray fluorescence spectrometers.
Smart Images
Figure CN224682162U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of X-ray fluorescence spectroscopy detection and relates to a sample fixing device for a down-irradiation X-ray fluorescence spectrometer. Background Technology
[0002] X-ray fluorescence spectrometers are commonly used equipment for qualitative and quantitative elemental analysis, and are widely used in areas such as metallic materials, chemical raw materials, geological minerals, commodity inspection, product quality control, archaeology, and cultural relic identification.
[0003] In down-irradiation X-ray fluorescence spectrometry, the sample needs to be placed in a sample cup with the test plane facing down and centered at the bottom of the cup. The sample cup has a hole at its bottom center. During testing, the sample cup is placed into the X-ray fluorescence spectrometer's analysis chamber, and X-rays irradiate the sample surface exposed through the hole at the bottom of the cup for analysis. Samples are mainly divided into two categories: powder samples and block samples. Powder samples are prepared using two methods: pellet pressing and glass melting. The samples are circular pieces of varying thicknesses and diameters. Metal block samples are generally cylinders or cuboids within a certain size range. Especially for smaller samples, when the sample size is close to the diameter of the test hole on the mask, it is difficult to accurately center and fix the sample in the sample cup mask. This can cause the sample to easily shift and fall out of the test hole, resulting in uneven test surfaces or insufficient test area, leading to large deviations in the detection data and unusable experimental data.
[0004] Therefore, there is an urgent need in the field of X-ray fluorescence spectroscopy for a simple and versatile sample fixation device to solve the problems mentioned in the background. Utility Model Content
[0005] The purpose of this invention is to solve the above-mentioned problems and provide a device for fixing cylindrical or cuboid samples that can be conveniently positioned in the center and is suitable for testing a certain range of sizes using an X-ray fluorescence spectrometer.
[0006] The technical solution of this utility model: A sample fixing device for a down-irradiation X-ray fluorescence spectrometer includes a base 1, a reference plane 2, a spring stop 3, a spring 4, an internal hex bolt 5, a slide groove 6, a V-shaped slider 7, a threaded hole A8, a threaded hole B9, a boss 10, and a lead screw 11. The base 1, reference plane 2, slide groove 6, threaded hole A8, threaded hole B9, and boss 10 are an integral structure. The base 1 is cylindrical in shape, with the reference plane 2 on its upper surface and a slide groove 6 at the center of the reference plane 2. The lower surface of the base 1 is the boss 10. A threaded hole B9 and four symmetrically distributed threaded holes A8 are opened at the center of the slide groove 6. The threaded hole B9 is a through hole that passes through the center of the boss 10. The lead screw 11 is screwed into the threaded hole B9 of the slide groove 6 from the through hole of the boss 10, ensuring that the center of the lead screw 11 is in the same axial direction as the center of the boss 10 and the base 1. Two V-shaped sliders 7 are symmetrically arranged in the slide grooves 6 on the reference plane 2, and fixing holes are opened on the outer wall of the V-shaped sliders 7. Two spring stops 3 are arranged on the outer side of the two V-shaped sliders 7 respectively. The internal hex bolts 5 pass through the through holes on the spring stops 3 and enter the threaded holes A8 to fix them on the slide grooves on the base 1. The inner wall of the spring stops 3 has fixing holes. One end of the spring 4 is fixed in the fixing hole of the V-shaped slider 7, and the other end is fixed in the fixing hole of the spring stop 3. The V-shaped slider 7 moves on the base 1 through the slide groove.
[0007] The V-shaped slider 7, spring 4, and spring stop 3 are symmetrical structures.
[0008] The upper surfaces of the reference plane 2, the spring stop 3, and the V-shaped slider 7 are on the same horizontal plane.
[0009] The base 1 is made of stainless steel.
[0010] The V-shaped slider 7 is made of polyester fiber.
[0011] The base 1 has a diameter of 50 mm and a height of 35 mm.
[0012] The beneficial effects of this utility model are: (1) This utility model is compatible with most down-irradiation X-ray fluorescence spectrometers, is easy to install and disassemble, is easy to operate, and is easy to prepare samples, especially suitable for Malvern Panaco X-ray fluorescence spectrometers.
[0013] (2) The height can be adjusted by rotating the screw to suit samples with a height within a certain size range.
[0014] (3) The V-groove used with the spring can fix cylindrical or cuboid samples within a certain size range, solving the problem of centering and moving small samples.
[0015] (4) The base is made of steel, and its own weight helps to fit the sample test surface well onto the test mask. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of a sample fixing device for a down-irradiation X-ray fluorescence spectrometer. Figure 2 An exploded view of a sample fixing device for a down-irradiation X-ray fluorescence spectrometer. Figure 3 This is a structural assembly diagram of a sample fixing device for a down-irradiation X-ray fluorescence spectrometer. In the diagram: 1-base, 2-reference plane, 3-spring stop, 4-spring, 5-hex socket head cap screw, 6-slide groove, 7-V-type slider, 8-threaded hole A, 9-threaded hole B, 10-boss, 11-lead screw. Detailed Implementation
[0017] The specific embodiments of this utility model are further described below with reference to the accompanying drawings and technical solutions.
[0018] like Figure 2 As shown, a sample fixing device for a down-irradiation X-ray fluorescence spectrometer includes a base 1, a reference plane 2, a spring stop 3, a spring 4, an internal hex bolt 5, a slide groove 6, a V-shaped slider 7, a threaded hole A8, a threaded hole B9, a boss 10, and a lead screw 11. The V-shaped slider 7 and the spring stop 3 are installed in the slide groove on the base 1. The spring stop 3 is fixed to the base 2 by the internal hex bolt 5. The two ends of the spring 4 are respectively inserted into the holes of the V-shaped slider 7 and the spring stop 3, forming a symmetrical structure. The lead screw 11 passes through the boss 10 and the threaded hole on the base 1, and the center of the lead screw 11 is on the same axis as the center of the base 1.
[0019] The following is combined Figure 2 This invention can be described in one practical application process: In this embodiment, the V-shaped slider 7 is used to place the sample, with the sample higher than the reference plane 2. If the sample is too thin and lower than the reference plane 2, the lead screw 11 needs to be rotated to hold the sample in place until the sample plane is higher than the reference plane 2. After the sample is loaded, the device is inverted, and the boss 10 is placed into the sample cup. Since the base 1 is made of stainless steel, gravity will ensure that the sample testing surface fits well with the sample cup, and the sample is also well centered and fixed in the center of the sample cup, ready for testing.
[0020] A key technical advantage of this embodiment is that the device has a simple structure, is easy to use, and is highly practical. The height can be adjusted by rotating the lever to accommodate samples with heights within a certain range. The V-shaped slider 7, used in conjunction with the spring 4, can fix cylindrical or cuboid samples with dimensions within a certain range. This effectively solves the problems of centering and moving small samples. The base 1 is made of steel, and its own weight helps to better fit the sample testing surface onto the testing mask.
Claims
1. A sample fixing device for a down-irradiation X-ray fluorescence spectrometer, characterized in that, The sample fixing device for the down-irradiation X-ray fluorescence spectrometer includes a base (1), a reference plane (2), a spring stop (3), a spring (4), an internal hex bolt (5), a slide groove (6), a V-shaped slider (7), a threaded hole A (8), a threaded hole B (9), a boss (10), and a lead screw (11). The base (1), reference plane (2), slide groove (6), threaded hole A (8), threaded hole B (9) and boss (10) are an integral structure. The base (1) is cylindrical in shape. Its upper surface is the reference plane (2), and the center of the reference plane (2) is a slide groove (6). The lower surface of the base (1) is the boss (10). A threaded hole B (9) and four symmetrically distributed threaded holes A (8) are opened at the center of the slide groove (6). The threaded hole B (9) is a through hole that passes through the center of the boss (10). The lead screw (11) is screwed into the threaded hole B (9) of the slide groove (6) from the through hole of the boss (10), ensuring that the center of the lead screw (11) is on the same axis as the center of the boss (10) and the base (1). Two V-shaped sliders (7) are symmetrically arranged in the slide groove (6) on the reference plane (2), and the outer wall of the V-shaped sliders (7) has fixing holes; Two spring blocks (3) are arranged on the outside of two V-shaped sliders (7). The internal hex bolts (5) pass through the through holes on the spring blocks (3) and enter the threaded holes A (8) to fix them on the slide groove on the base (1). The inner wall of the spring blocks (3) has fixing holes. One end of the spring (4) is fixed in the fixing hole of the V-shaped slider (7), and the other end is fixed in the fixing hole of the spring stop (3). The V-shaped slider (7) moves on the base (1) through the slide groove.
2. The sample fixing device for a down-irradiation X-ray fluorescence spectrometer according to claim 1, characterized in that, The V-shaped slider (7), spring (4), and spring stop (3) are symmetrical structures.
3. The sample fixing device for a down-irradiation X-ray fluorescence spectrometer according to claim 1, characterized in that, The upper surfaces of the reference plane (2), the spring stop (3), and the V-shaped slider (7) are on the same horizontal plane.
4. The sample fixing device for a down-irradiation X-ray fluorescence spectrometer according to claim 1, characterized in that, The base (1) is made of stainless steel.
5. The sample fixing device for a down-irradiation X-ray fluorescence spectrometer according to claim 1, characterized in that, The V-shaped slider (7) is made of polyester fiber.
6. The sample fixing device for a down-irradiation X-ray fluorescence spectrometer according to claim 1, characterized in that, The base (1) has a diameter of 50 mm and a height of 35 mm.