Sample preparation device for graphite solid waste x-ray diffraction detection

Abstract

This utility model discloses a sample preparation device for X-ray diffraction detection of graphite solid waste, including a base and a cover on the base. A door is provided on the side wall of the cover. A support platform is rotatably mounted on the base, and a square hole is provided on the support platform. A cylinder is provided on the top of the cover, and the piston rod of the cylinder extends into the cover and is connected to a shock-absorbing connecting block. The shock-absorbing connecting block is made of rubber, preferably high-hardness rubber. A pressure head connecting handle is connected to the shock-absorbing connecting block, and a compaction plate is connected to the pressure head connecting handle. A miniature vibration motor is provided on the pressure head connecting handle. A mesh pattern is provided on the side of the compaction plate away from the pressure head connecting handle, and a brush retaining ring composed of brushes is provided on the edge of the compaction plate. A negative pressure interface is provided on the side wall of the cover, and the negative pressure interface is connected to a negative pressure pump through a pipeline. This utility model can improve the accuracy of the detection results and ensure the cleanliness of the laboratory environment.

Description

Technical Field

[0001] This utility model relates to the field of materials analysis technology, specifically to a sample preparation device for X-ray diffraction detection of graphite solid waste. Background Technology

[0002] X-ray diffraction (XRD) analysis is an important tool for studying the crystal structure of materials and for qualitative and quantitative analysis of phases. When performing XRD analysis on carbon materials such as graphite solid waste, natural graphite, or artificial graphite, the quality of sample preparation directly determines the accuracy of the test data.

[0003] Current methods for preparing graphite powder samples typically employ manual pressing or simple mechanical pressing machines. However, existing technologies present two significant technical challenges when processing graphite materials: First, graphite crystals have a typical layered structure with weak interlayer bonding, resulting in graphite powder particles often being plate-like. Under traditional unidirectional pressure, plate-like graphite particles are prone to "preferred orientation," meaning the particles tend to align with their plate planes parallel to the sample surface. This directional alignment leads to an abnormally high intensity of the diffraction peak on the (002) crystal plane in the XRD pattern, while the peak intensities of other crystal planes are relatively weakened, significantly deviating from the true powder diffraction intensity ratio and thus misleading the analysis results. Second, graphite solid waste powder is typically extremely fine in size and low in density, exhibiting strong airborne properties, and graphite dust possesses excellent conductivity. In existing open or semi-open sample preparation processes, dust easily disperses into the laboratory air, polluting the environment and harming the respiratory health of operators. More seriously, once conductive dust settles on the circuit boards of precision instruments, it can easily cause short circuits and damage the equipment. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a sample preparation device for X-ray diffraction detection of graphite solid waste.

[0005] This utility model is achieved through the following technical solution: A sample preparation device for X-ray diffraction detection of graphite solid waste includes a base and a cover on the base. A door is provided on the side wall of the cover. A support platform is rotatably mounted on the base, and a square hole is provided on the support platform. A cylinder is provided on the top of the cover. The piston rod of the cylinder extends into the cover and is connected to a shock-absorbing connecting block. The shock-absorbing connecting block is made of rubber, preferably high-hardness rubber. A pressure head connecting handle is connected to the shock-absorbing connecting block, and a compaction plate is connected to the pressure head connecting handle. A miniature vibration motor is provided on the pressure head connecting handle. The side of the compaction plate away from the pressure head connecting handle has a mesh pattern, and a brush retaining ring composed of brushes is provided around the edge of the compaction plate. A negative pressure interface is provided on the side wall of the cover, and the negative pressure interface is connected to a negative pressure pump through a pipeline.

[0006] Preferably, a sealing strip is provided at the connection between the cover and the base.

[0007] Preferably, the cylinder is mounted via an L-shaped bracket, which is connected to the base.

[0008] Preferably, a bellows is provided between the top of the cover and the L-shaped bracket, and the piston rod of the cylinder is located inside the bellows.

[0009] Preferably, a rotating shaft is provided on the support platform, and a bearing and bearing seat that cooperate with the rotating shaft are provided on the base; a motor is provided inside the base, and meshing bevel gears are provided on the output shaft of the motor and the rotating shaft of the support platform.

[0010] Preferably, a waste collection trough is provided inside the base, a waste outlet is provided at the waste collection trough on the base, and a guide ramp is provided at the waste outlet.

[0011] Preferably, the edge of the pressure head connecting handle and the compaction plate is fitted with an installation ring, and the brush is set on the installation ring.

[0012] The beneficial effects of this utility model are reflected in: The mesh pattern on the compaction plate of this invention, combined with the high-frequency vibration of the vibrating motor, can cause the graphite flake particles to randomly flip, breaking the orderly arrangement, significantly weakening the abnormal enhancement effect of the (002) crystal plane in the XRD pattern, restoring the true mirror diffraction intensity ratio, and thus greatly improving the accuracy of the analysis.

[0013] This invention, through the design of a brush retaining ring, sealing strip, corrugated pipe, and negative pressure environment, prevents graphite dust from drifting into the air, ensuring a clean laboratory environment and preventing it from depositing on circuit boards and causing short circuits. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0015] Figure 1 This is a structural view of the present invention.

[0016] Figure 2 This is a partial view of the pressure head connecting handle, compaction plate, mounting ring, and brush of this utility model.

[0017] Figure 3 This is a structural view of the cover of this utility model.

[0018] Figure 4 This is the front view of the sample holder of this utility model. In the attached diagram: 1. Base; 2. Motor; 3. Rotating shaft; 4. Support platform; 5. Waste collection trough; 6. Guide ramp; 7. Square hole; 8. L-shaped bracket; 9. Cylinder; 10. Shock-absorbing connecting block; 11. Miniature vibration motor; 12. Corrugated pipe; 13. Pressure head connecting handle; 14. Compactor plate; 15. Brush; 16. Mounting ring; 17. Cover; 18. Sealing strip; 19. Negative pressure interface; 20. Chamber door; 21. Positioning block; 22. Sample rack. Detailed Implementation

[0019] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0020] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0021] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” may be used herein to describe the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] The present invention will now be described in detail with reference to the accompanying drawings: Overall structure of the device: The device mainly consists of a base 1, a cover over the base 1, and a compaction mechanism installed on the base 1. The base 1 has a waste collection trough 5 inside, and a waste outlet is opened on the side of the base 1 corresponding to the position of the waste collection trough 5. An outwardly inclined guide ramp 6 is provided at the waste outlet to facilitate the cleaning of graphite powder that falls into the base 1.

[0024] The rotating support system works in conjunction with the sample holder 22: A circular support platform 4 is rotatably mounted on the upper surface of the base 1. To achieve automatic rotation of the support platform 4, a drive motor 2 is installed inside the base 1, and bearing seats and bearings are mounted on the panel of the base 1. A rotating shaft 3 is connected to the center of the bottom of the support platform 4, which passes through the bearing and extends into the interior of the base 1. Meshing bevel gears are fixedly mounted on the output shaft of the motor 2 and at the lower end of the rotating shaft 3 of the support platform 4, respectively. When the motor 2 starts, the support platform 4 is driven to rotate at a uniform speed on the horizontal plane through the transmission of the bevel gear set.

[0025] This device is also equipped with a dedicated sample holder 22. A square hole 7 is provided at the center of the upper surface of the support stage 4, and a positioning block 21 with a shape and size that fits tightly with the square hole 7 is provided at the bottom of the sample holder 22. A sample groove for filling graphite powder is provided on the upper surface of the sample holder 22. In use, the positioning block 21 at the bottom of the sample holder 22 is inserted into the square hole 7 of the support stage 4. The geometric fit between the square hole 7 and the positioning block 21 achieves limiting and torque transmission, ensuring that the sample holder 22 can rotate synchronously and stably with the support stage 4 without relative slippage.

[0026] Dustproof and Negative Pressure System: The cover is fastened to the base 1. To ensure a tight seal at the connection and prevent dust leakage, a sealing strip 18 is installed at the contact point between the bottom edge of the cover and the base 1. A hinged door 20 is provided on the side wall of the cover for placing and removing sample racks 22. To address the issue of dust dispersion, a negative pressure interface 19 is also provided on the side wall of the cover, which is connected to an external laboratory negative pressure pump or vacuum cleaner via piping. Furthermore, a special sealing design is employed to prevent dust from escaping through the mechanical moving parts at the top. The cylinder 9 is mounted and fixed by an L-shaped bracket 8, the vertical end of which is connected to the base 1. A retractable bellows 12 is connected between the top opening of the cover and the top of the L-shaped bracket 8. The piston rod of the cylinder 9 passes through the L-shaped bracket 8 and is encased inside the bellows 12, extending into the cover. This design allows the piston rod to move up and down while ensuring complete sealing of the internal space of the cover.

[0027] Compaction and Vibration System: Cylinder 9 is vertically downward, with the end of its piston rod extending into the housing. To protect cylinder 9 from high-frequency vibration, the end of the piston rod is not directly connected to the pressure head, but rather to a damping connecting block 10. This damping connecting block 10 is made of rubber, preferably high-hardness rubber, which can both transmit pressure and absorb high-frequency vibration waves. A pressure head connecting handle 13 is connected below the damping connecting block 10, and a miniature vibration motor 11 is fixedly installed on the side of the pressure head connecting handle 13. A compaction plate 14 is detachably connected to the bottom of the pressure head connecting handle 13 via threads. The size of the compaction plate 14 must be sufficient to cover the sample slot on the sample holder 22; that is, the bottom area of ​​the compaction plate 14 is greater than or equal to the opening area of ​​the sample slot to ensure complete compaction of the graphite powder within the slot. The lower surface of the compaction plate 14 (i.e., the surface in contact with the sample) is etched with a mesh pattern. A mounting ring 16 is fitted around the edge of the compaction plate 14, and a dense ring of soft bristles 15 is fixed on the mounting ring 16, forming a bristle retaining ring. When the compaction plate 14 is pressed down, the bristle retaining ring first contacts the surface of the sample holder 22 and surrounds the sample slot to prevent powder from splashing in all directions.

[0028] Working Principle and Usage: During use, the operator opens the chamber door 20, inserts the sample holder 22 filled with graphite solid waste powder into the square hole 7 of the support platform 4 via the positioning block 21 at the bottom, and closes the chamber door 20. The negative pressure pump is then activated to create a micro-negative pressure environment inside the enclosure. Next, the motor 2 inside the base 1 is started, and the support platform 4 drives the sample holder 22 to begin rotating at a low speed through the square hole 7. Simultaneously, the cylinder 9 drives the piston rod downwards. When the compaction plate 14 completely covers and contacts the powder surface in the sample slot, the micro-vibration motor 11 is activated. At this time, the mesh-like texture on the surface of the compaction plate 14, under the combined action of rotation and high-frequency vibration, produces complex shearing and disturbance effects on the graphite powder surface. This force forces the flake-like graphite particles to randomly tumble, breaking the originally easily formed horizontal orderly arrangement. In the final stage of compaction, vibration stops, and the cylinder 9 continues to apply static pressure to solidify the sample, after which the cylinder 9 returns to its original position. Throughout the process, any fine graphite dust that is stirred up is confined within the enclosure and quickly removed by the negative pressure port 19, ensuring a clean operating environment. The resulting sample has a smooth surface and random particle orientation, which can significantly weaken the abnormal enhancement effect of the (002) crystal plane in the XRD pattern, thereby obtaining accurate detection and analysis results.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A sample preparation device for X-ray diffraction detection of graphite solid waste, comprising a base (1) and a cover (17) covering the base (1), wherein the side wall of the cover (17) is provided with a door (20), characterized in that: A support platform (4) is rotatably mounted on the base (1), and a square hole (7) is provided on the support platform (4); a cylinder (9) is provided on the top of the cover (17), the piston rod of the cylinder (9) extends into the cover (17) and is connected to a shock-absorbing connecting block (10), a pressure head connecting handle (13) is connected to the shock-absorbing connecting block (10), a compaction plate (14) is connected to the pressure head connecting handle (13), and a micro vibration motor (11) is provided on the pressure head connecting handle (13); a mesh pattern is provided on the side of the compaction plate (14) away from the pressure head connecting handle (13), and a brush (15) retaining ring composed of a ring of brushes (15) is provided on the edge of the compaction plate (14); a negative pressure interface (19) is provided on the side wall of the cover (17).

2. The sample preparation device for X-ray diffraction detection of graphite solid waste as described in claim 1, characterized in that: A sealing strip (18) is provided at the connection between the cover (17) and the base (1).

3. The sample preparation device for X-ray diffraction detection of graphite solid waste as described in claim 1, characterized in that: The cylinder (9) is installed via an L-shaped bracket (8), which is connected to the base (1).

4. The sample preparation device for X-ray diffraction detection of graphite solid waste as described in claim 3, characterized in that: A bellows (12) is provided between the top of the cover (17) and the L-shaped bracket (8), and the piston rod of the cylinder (9) is located inside the bellows (12).

5. The sample preparation device for X-ray diffraction detection of graphite solid waste as described in claim 1, characterized in that: A rotating shaft (3) is provided on the support platform (4), and a bearing and bearing seat that cooperate with the rotating shaft (3) are provided on the base (1); a motor (2) is provided inside the base (1), and meshing bevel gears are provided on the output shaft of the motor (2) and on the rotating shaft (3) of the support platform (4).

6. The sample preparation device for X-ray diffraction detection of graphite solid waste as described in claim 1, characterized in that: A waste collection trough (5) is provided inside the base (1), and a waste outlet is provided at the waste collection trough (5) on the base (1), and a guide ramp (6) is provided at the waste outlet.

7. The sample preparation device for X-ray diffraction detection of graphite solid waste as described in claim 1, characterized in that: The edges of the pressure head connecting handle (13) and the compaction plate (14) are fitted with mounting rings (16), and brushes (15) are set on the mounting rings (16).

Images