Pressing device for powder sample and high-purity indium sheet of glow discharge mass spectrometer

Abstract

The utility model discloses a pressing device for a powder sample and a high-purity indium sheet of a glow discharge mass spectrometer, and belongs to the field of glow discharge mass spectrometry in chemical component analysis. The device comprises an external supporting and protecting system, an internal tabletting system and upper and lower pressing dies. The external supporting and protecting system comprises a touch screen, a protective cover, a safety grating, a control box and the like. The internal tabletting system is composed of an equipment base, a fixed stand column, a movable table, an electric push cylinder, a pressure sensor and the like, and the movable table is driven by the electric push cylinder to drive a lower pressing die to move upwards to be matched with a fixed upper pressing die to complete pressing. The device adopts replaceable upper and lower pressing dies and a sample pressing ring, and meets the preparation requirements of samples with different sizes. The device solves the problems that a powder sample is difficult to compact and the thickness of the prepared indium sheet is not uniform, the pressing parameters are controlled in a programmed manner, the prepared sample can be directly tested without demolding, the integrity of the sample and the test accuracy are effectively ensured, the operation is safe, the efficiency is high, and the economical efficiency is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of glow discharge mass spectrometry analysis in chemical component analysis, concretely relates to a kind of pressing device for powder sample and high purity indium sheet of glow discharge mass spectrometer. BACKGROUND

[0002] Material chemical component analysis is an important test content of physical and chemical inspection, and as an effective method for solid trace element detection, glow discharge mass spectrometry has the advantages of no complex pretreatment, full-element analysis, low detection limit, high sensitivity, weak matrix effect and stable ion source. This method plays an irreplaceable role especially in the analysis of trace and ultra-trace elements of high-purity metals, semiconductor materials, ceramics and other functional materials.

[0003] In actual analysis process, the sample provided by user is various in shape, but the glow discharge mass spectrometer can usually only directly test standard rod-shaped or sheet-shaped samples. Therefore, for a large number of non-standard samples (such as various powders), appropriate pretreatment must be carried out to prepare them into a form acceptable to the instrument. At present, the common treatment method for powder samples is to put them into a high-purity tantalum tank and compact them, or to lay them on a high-purity indium sheet and compact them, and then test them as rod-shaped or sheet-shaped samples respectively, and the latter method is more commonly used.

[0004] However, since the essence of glow discharge mass spectrometry analysis is to perform layer-by-layer sputtering stripping on the surface of the sample, the existing technology has the following problems in the sample preparation link:

[0005] 1. Difficult to compact powder: For some ultra-fine powders with extremely small particle size and poor fluidity (such as molybdenum powder), it is difficult to achieve effective and uniform compaction on the high-purity indium sheet by manual method, resulting in uneven initial density of the sample.

[0006] 2. Unstable analysis signal: During the glow discharge process, the compacted powder sample may continuously fall off due to insufficient bonding force, causing the matrix signal and the measured element signal to continuously decay, ultimately resulting in large fluctuations and reduced accuracy of the element analysis results.

[0007] 3. Difficult to accurately control the preparation process of indium sheet: In the process of manually pressing the high-purity indium sheet, the control of pressing force mainly depends on the experience of the operator. Too much force can easily cause the indium sheet to be too thin, which is prone to breakage during subsequent cleaning or clamping; too little force can result in insufficient diameter of the pressed indium sheet, which cannot match the standard sheet-shaped clamp, and the thick indium sheet also causes waste of high-purity material, which is not economical. UTILITY MODEL CONTENTS

[0008] In order to solve the above problems, the utility model provides a pressing device for powder sample and high purity indium sheet of glow discharge mass spectrometer.

[0009] The utility model discloses a technical scheme is:

[0010] A kind of pressing device for powder sample and high purity indium sheet of glow discharge mass spectrometer, the device includes equipment base, bottom plate, fixed column, fixed top rod, moving table, push cylinder mounting plate, electric push cylinder, pressure sensor, top plate, upper die, lower die and movable top rod;

[0011] The bottom plate is equipped with multiple fixed columns and at least one fixed top rod on the upper end of the equipment base;

[0012] The fixed column penetrates the moving table, and the moving table is supported and can move along the fixed column;

[0013] The moving table is connected with the cylinder body of electric push cylinder through push cylinder mounting plate;

[0014] The top end of the fixed column is connected with the top plate, and the pressure sensor is installed on the top plate, and the upper die is installed on the lower end;

[0015] The piston rod of the electric push cylinder is connected to the pressure sensor;

[0016] The lower die is fixed on the moving table, and the movable top rod is arranged in the lower die;

[0017] The fixed top rod is located below the movable top rod, and when the moving table descends, the fixed top rod is adapted to contact the movable top rod to eject the sample.

[0018] Further, it further includes touch screen, protective cover, safety grating, control box and adjustable foot, the touch screen is fixed in front of the protective cover, the control box is arranged on the side of the protective cover, the safety grating is installed in the opening position of the protective cover, and the adjustable foot is installed at the bottom of the equipment base.

[0019] Further, the control box is equipped with power switch, start button and emergency stop button.

[0020] Further, it further includes moving table push rod, and the moving table is connected with push cylinder mounting plate through the moving table push rod.

[0021] Further, it further includes upper die holder and upper die locking bolt, and the upper die holder is fixed with the upper die by the upper die locking bolt.

[0022] Further, it further includes lower die pressing plate and lower die locking bolt, and the lower die pressing plate is fixed with the lower die by the lower die locking bolt.

[0023] Further, the sample pressing ring is placed on the movable top rod, the sample pressing ring is of metal material, and the metal material is stainless steel.

[0024] Further, the diameter of the sample compression ring is between 15mm and 30mm.

[0025] Further, the number of the mobile station push rods is two, and the number of the fixed stand is four.

[0026] The utility model discloses the beneficial effect is:

[0027] 1. Realize the standardization of powder sample, high fidelity sample preparation: the device can accurately compress the powder sample for glow discharge mass spectrometry into a size that completely matches the instrument clamp. The core advantage is that the compressed sample does not need to be separated from the sample compression ring and can be directly tested with the compression ring. This approach fundamentally avoids sample surface contamination or structural damage that may occur during demolding, ensuring the integrity of the original state of the sample, thereby providing a guarantee for obtaining stable and accurate test signals.

[0028] 2. Realize the efficient and high-quality preparation of high-purity indium sheet: the utility model provides a special compression mold for the preparation of high-purity indium sheet. By cutting high-purity indium into blocks of consistent weight and using the device to accurately control the descent distance of the upper compression mold, indium sheets with uniform thickness (for example, controlled within 1mm~2mm) can be batch-prepared. This not only ensures the uniformity of indium sheet quality, effectively avoids thickness unevenness and easy contamination caused by manual compression, but also significantly improves sample preparation efficiency and reduces the waste of precious metal indium.

[0029] 3. Significantly improve the safety and intelligence level of the sample preparation process: the utility model integrates multiple safety protection measures such as safety grating and emergency stop button in the device, which can effectively prevent personal injury or equipment damage caused by misoperation during compression, with high safety. In addition, through the equipped touch screen, the operator can personalize and program the key parameters such as compression force, holding time and compression speed according to the physical properties (such as particle size, hardness and fluidity) of different powder materials. This flexible parameter adjustment capability ensures that powders of various properties can be compacted and densified, fundamentally solving the problem of powder falling off during analysis.

[0030] 4. Enhance the versatility and operation convenience of the device: the tabletting system of the utility model adopts modular design, and the core components such as the upper compression mold, sample compression ring, lower compression mold and movable top rod can be conveniently replaced. This makes the device flexible to adapt to sample preparation of different properties, different sample quantities and specific testing needs (such as different diameter specifications), with reasonable, simple and feasible operation. In addition, after compression is completed, the device drives a series of linkage mechanisms such as movable top rod through electric push cylinder, which can automatically eject the compressed sample, greatly facilitating the sampling operation. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 Figure 1 is a perspective view of a pressing device for powder samples and high-purity indium sheets of a glow discharge mass spectrometer.

[0032] Figure 2 Figure 2 is a perspective view of an internal pressing system of the pressing device for powder samples and high-purity indium sheets of a glow discharge mass spectrometer.

[0033] Figure 3 Figure 3 is a front view of the pressing device for powder samples and high-purity indium sheets of a glow discharge mass spectrometer.

[0034] Figure 4 Figure 4 is a sectional view of the pressing device for powder samples and high-purity indium sheets of a glow discharge mass spectrometer.

[0035] Figure 5 Figure 5 is a top view of the pressing device for powder samples and high-purity indium sheets of a glow discharge mass spectrometer.

[0036] Figure 6 Figure 6 is a sectional view of upper and lower pressing dies of the pressing device for powder samples and high-purity indium sheets of a glow discharge mass spectrometer.

[0037] Fig. 1 is a perspective view of a pressing device for powder samples and high-purity indium sheets of a glow discharge mass spectrometer. DETAILED DESCRIPTION

[0038] The utility model will be further described below in combination with examples and the accompanying drawings, but is not limited thereto.

[0039] Example 1

[0040] A pressing device for powder samples and high-purity indium sheets of a glow discharge mass spectrometer is composed of an external support protection system, an internal pressing system and upper and lower pressing dies, wherein:

[0041] The external support protection system comprises adjustable feet 5, a touch screen 1, a control box 4 and a safety grating 3, the touch screen 1 is fixed in front of a protective cover 2, the control box 4 is arranged on the side of the protective cover 2, the safety grating 3 is installed at the opening position of the protective cover 2, and the adjustable feet 5 are installed at the bottom of a device base 20; the control box 4 is provided with a power switch 6, a start button 7 and an emergency stop button 8.

[0042] The internal tabletting system comprises a device base 20, a bottom plate 19 arranged on the device base 20, four fixed vertical columns 21 and a fixed top rod 18 arranged on the bottom plate 19; a top plate 12 is arranged at the top end of the fixed vertical columns 21, a pressure sensor 11 is connected to the upper end of the top plate 12, and a piston rod of an electric push cylinder 9 is connected to the pressure sensor 11; an upper die holder 13 is connected to the lower end of the top plate 12, and the upper die holder 13 is fixed with an upper compression die 14 through upper die locking bolts 22;

[0043] A movable table 17 is arranged on the fixed vertical columns 21, the movable table 17 is connected with a push cylinder mounting plate 10 through two movable table push rods 23, and a cylinder body of the electric push cylinder 9 is connected to the upper end of the push cylinder mounting plate 10; a lower die pressing plate 25 is arranged on the movable table 17, the lower die pressing plate 25 is fixed with a lower compression die 16 through lower die locking bolts 24, and a movable top rod 15 is arranged in the lower compression die 16.

[0044] The fixed top rod 18 is located below the movable top rod 15. The movable top rod 15 can slide relative to the lower compression die 16; and the working process of the ejection mechanism is as follows: when the movable table 17 descends, the fixed top rod 18 first contacts and prevents the movable top rod 15 from continuing to descend, then the movable table 17 drives the lower compression die 16 to continue to descend, so that the prepared sample is ejected from the lower compression die 16 by the movable top rod 15.

[0045] Example 2

[0046] On the basis of example 1, a sample pressing ring 26 made of metal is arranged on the movable top rod 15, the diameter of the sample pressing ring 26 is between 15 mm and 30 mm, and the upper compression die 14 and the lower compression die 16 can be replaced by compression dies with different sizes according to the properties of the sample.

[0047] The device is used to prepare powder samples or high-purity indium pieces for a glow discharge mass spectrometer, and the specific steps are as follows:

[0048] Firstly, the upper compression die 14 suitable for the properties and amount of the powder is selected, arranged on the upper die holder 13, and fixed by the upper die locking bolts 22; the lower compression die 16 is fixed on the lower die pressing plate 25 and fixed by the lower die locking bolts 24. The sample pressing ring 26 matching the size of the upper compression die 14 is selected, fixed, cleaned by alcohol, and then the powder sample or the block-shaped high-purity indium with a weight of 1 g to be prepared is placed in the sample pressing ring 26.

[0049] The power switch 6 on the control box 4 is turned on, the program for pressing is programmed on the touch screen 1, including the pressing distance, the pressure, the pressure increasing rate, the pressure maintaining time and other parameters; the start button 7 is clicked, the cylinder body of the electric push cylinder 9 moves upward, drives the push cylinder mounting plate 10, the movable table push rod 23, the movable table 17, the lower compression die 16 and the movable top rod 15 to move upward together, the upper compression die 14 remains stationary during the working process, and the pressing of the sample is completed by driving the lower compression die 16 to move upward.

[0050] After the pressing is completed, the moving table 17 will automatically descend, and the lower die 16 and the movable ejector pin 15 will move downward at the same time. After moving to a certain position, the fixed ejector pin 18 will first push against the movable ejector pin 15 so that it will not descend any further; at the same time, the moving table 17 continues to move downward with the lower die 16 relative to the stationary movable ejector pin 15, so that the pressed sample can be ejected from the lower die 16, and the prepared sample can be taken out together with the sample pressing ring 26.

[0051] The overall perspective view of the pressing device for powder samples and high-purity indium sheets of the glow discharge mass spectrometer is shown in Figure 1 The internal tablet pressing system perspective view of the pressing device is shown in Figure 2 The front view of the pressing device is shown in Figure 3 The sectional view of the pressing device is shown in Figure 4 The top view of the pressing device is shown in Figure 5 The sectional view of the upper and lower dies of the pressing device is shown in Figure 6 .

[0052] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A pressing device for powder samples and high purity indium disks for glow discharge mass spectrometers, characterized by: The device comprises a device base (20), a bottom plate (19), fixed vertical columns (21), fixed top rods (18), a moving table (17), a push cylinder mounting plate (10), an electric push cylinder (9), a pressure sensor (11), a top plate (12), an upper pressing die (14), a lower pressing die (16) and a movable top rod (15). The device base (20) is connected with the bottom plate (19) at the upper end; the bottom plate (19) is provided with a plurality of fixed vertical columns (21) and at least one fixed top rod (18). The fixed vertical columns (21) penetrate the moving table (17) and support the moving table (17) to move along the fixed vertical columns (21). The moving table (17) is connected with the cylinder body of the electric push cylinder (9) through the push cylinder mounting plate (10). The fixed vertical columns (21) are connected with the top plate (12) at the top end, and the pressure sensor (11) is installed on the top plate (12), and the lower end is installed with the upper pressing die (14). The piston rod of the electric push cylinder (9) is connected to the pressure sensor (11). The lower pressing die (16) is fixed on the moving table (17), and the movable top rod (15) is arranged in the lower pressing die (16). The fixed top rod (18) is located below the movable top rod (15), and when the moving table (17) descends, the fixed top rod (18) is adapted to contact the movable top rod (15) to eject the sample.

2. The pressing device for powder sample and high purity indium sheet of glow discharge mass spectrometer according to claim 1, characterized in that: It also comprises a touch screen (1), a protective cover (2), a safety grating (3), a control box (4) and an adjustable foot (5), the touch screen (1) is fixed in front of the protective cover (2), the control box (4) is arranged on the side of the protective cover (2), the safety grating (3) is installed at the opening position of the protective cover (2), and the adjustable foot (5) is installed at the bottom of the device base (20).

3. The pressing device for powder sample and high purity indium sheet of glow discharge mass spectrometer according to claim 2, characterized in that: The control box (4) is provided with a power switch (6), a start button (7) and an emergency stop button (8).

4. The pressing device for powder sample and high purity indium sheet of glow discharge mass spectrometer according to claim 1, characterized in that: It also comprises a moving table push rod (23), and the moving table (17) is connected with the push cylinder mounting plate (10) through the moving table push rod (23).

5. The pressing device for powder sample and high purity indium sheet of glow discharge mass spectrometer according to claim 1, characterized in that: It also comprises an upper die seat (13) and an upper die locking bolt (22), and the upper die seat (13) is fixed with the upper pressing die (14) by the upper die locking bolt (22).

6. The pressing device for powder sample and high purity indium sheet of glow discharge mass spectrometer according to claim 1, characterized in that: It also comprises a lower die pressing plate (25) and a lower die locking bolt (24), and the lower die pressing plate (25) is fixed with the lower pressing die (16) by the lower die locking bolt (24).

7. The pressing device for powder sample and high purity indium sheet of glow discharge mass spectrometer according to claim 1, characterized in that: The sample pressing ring (26) is placed on the movable top rod (15), the sample pressing ring (26) is made of metal, and the metal is stainless steel.

8. The pressing device for powder sample and high purity indium sheet of glow discharge mass spectrometer according to claim 7, characterized in that: The diameter of the sample pressing ring (26) is between 15mm and 30mm.

9. The pressing device for powder sample and high purity indium sheet of glow discharge mass spectrometer according to claim 4, characterized in that: The number of the moving table push rod (23) is two, and the number of the fixed vertical column (21) is four.

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