Automatic powder sample preparation device for sample holder of X-ray diffractometer

Abstract

The invention discloses an X-ray diffractometer sample holder powder sample automatic preparation device, and relates to the technical field of experimental equipment, the X-ray diffractometer sample holder powder sample automatic preparation device comprises a sample table, a sample holder is arranged on the sample table, and a plurality of sample boxes are sequentially placed on the sample holder; the sample table comprises a circular positioning plate, two placement tables, two mounting frames, a feeding mechanism for conveying sample powder into the sample box, a flattening mechanism for flattening the sample powder in the sample box, and a driving mechanism for driving the sample frame to move in the length direction of the placement tables and penetrate through the circular positioning plate; according to the invention, through the uniform flattening of sample powder by the flattening mechanism and the control of the powder granularity by a screen of the feeding mechanism, the preferred orientation phenomenon of crystals in a sample due to overlarge pressure or improper method is reduced, the diffraction line broadening phenomenon is reduced, the definition of a diffraction pattern and the intensity measurement precision of a diffraction peak are improved, and the measurement accuracy of the diffraction peak is improved. The uniform distribution of the powder in each sample box is ensured, and the repeatability of experimental data is improved.

Description

Technical Field

[0001] The invention relates to the technical field of experimental equipment, and in particular to an automatic preparation device for powder samples of an X-ray diffractometer sample rack. Background Art

[0002] X-rays in X-ray diffractometers are electromagnetic waves with a very short wavelength of about 0.06-20nm. They can penetrate materials of a certain thickness and cause fluorescent materials to emit light, camera emulsions to be sensitive, gases to be ionized, and crystal materials to diffract. High-energy electron beams are used to bombard metal targets to generate X-rays, which will penetrate the test samples and, through auxiliary systems, can obtain the diffraction spectrum of the test samples. The staff can understand the condition of the test samples through the diffraction spectrum, and scientific researchers generally use it when analyzing mineral composition.

[0003] When flattening a sample, if the pressure is too high or the method is improper, the crystals in the sample may be arranged in a specific direction. This phenomenon is called preferred orientation. Preferred orientation affects the accuracy of the diffraction pattern because the diffraction intensity varies due to different crystal orientations, thus affecting the accuracy of the diffraction data. In addition, if the particle size of the sample powder is not suitable, the diffraction lines may be broadened, affecting the clarity of the diffraction pattern and the intensity measurement of the diffraction peak.

[0004] Aiming at the above problems, an automatic preparation device for powder samples of X-ray diffractometer sample holder is proposed. Summary of the invention

[0005] The object of the present invention is to provide an automatic preparation device for powder samples of an X-ray diffractometer sample rack to solve the above problems.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions: An automatic preparation device for powder samples of an X-ray diffractometer sample rack comprises a sample table, a sample rack is arranged on the sample table, a plurality of sample boxes are placed on the sample rack in sequence, the sample table comprises a circular positioning plate, two placing tables, two mounting frames, a feeding mechanism for conveying sample powder into the sample box, a flattening mechanism for flattening the sample powder in the sample box, and a driving mechanism for driving the sample rack to move along the length direction of the placing table and pass through the circular positioning plate, the circular positioning plate is vertically installed inside the X-ray diffractometer, the two placing tables are horizontally arranged on both sides of the circular positioning plate, a through slot for the sample rack to pass through is opened on the circular positioning plate, the two mounting frames are symmetrically arranged on both sides of the top of the circular positioning plate, the feeding mechanism and the flattening mechanism are arranged on one of the mounting frames in sequence and are located directly above the sample rack, and the driving mechanism is installed on one side of one of the placing tables and is transmission-connected to the sample rack.

[0007] As a preferred solution of the present invention, the flattening mechanism includes a pressing plate, a protective cover and an electric push rod, the electric push rod is installed on a mounting frame, the protective cover is fixed on the output end of the electric push rod, and the protective cover faces the sample box and is matched with the sample box, the pressing plate is fixed at a middle position inside the protective cover, and the pressing plate is matched with a groove of the sample box, a micro vacuum pump is installed on the protective cover, and the output end of the micro vacuum pump passes through the protective cover and extends into the interior thereof.

[0008] As a preferred solution of the present invention, the feeding mechanism includes a feeding box, a screen and a bellows. A feeding pipe is inserted into the mounting frame on the same side as the flattening mechanism. The bellows is fixedly connected to the bottom of the feeding pipe, the feeding box is fixedly connected to the bottom of the bellows, the screen is fixedly connected to the inner bottom of the feeding box, and a control valve is installed on the feeding pipe.

[0009] As a preferred solution of the present invention, a connecting piece is connected between the flattening mechanism and the feeding mechanism, and the connecting piece includes two rings and a fixed rod. A connecting pipe is detachably connected to the dispensing box, and the connecting pipe is sleeved on the corrugated pipe. The two rings are fixedly sleeved on the electric push rod and the connecting pipe respectively. The fixed rod is located between the two rings, and the two ends of the fixed rod are fixedly connected to the outer walls of the two rings respectively.

[0010] As a preferred solution of the present invention, the bottom of the fixing rod is fixedly connected to a fixing frame, and the bottom of the fixing frame is detachably connected to a scraper; When the sample holder moves under the scraper, the scraper contacts the upper surface of the sample box.

[0011] As a preferred solution of the present invention, the driving mechanism includes a mounting plate and two driving gears, the mounting plate is fixedly arranged on one side of the top of one of the placing tables, and an air guide groove and a mounting groove are sequentially opened inside the mounting plate from top to bottom, and the two driving gears are rotatably arranged on both sides of the mounting groove, and a transmission belt is connected between the two driving gears for transmission, a motor is installed outside the mounting plate, and the motor output shaft extends into the mounting groove after passing through the mounting plate, and the motor output shaft is fixedly connected to the rotating shaft of one of the driving gears, and a tooth plate is fixedly connected to one side of the outer wall of the sample rack, the tooth plate faces the mounting groove, and the gear is meshed with the tooth plate.

[0012] As a preferred solution of the present invention, both of the two placement tables are provided with slide rails, and the sample rack is slidably arranged on the slide rails.

[0013] As a preferred solution of the present invention, a filter is provided at the opening of the air guide groove, and the opening faces the upper surface of the sample rack, and an air pump is provided on one side of the mounting plate, and the input end of the air pump passes through the mounting plate and extends to the inside of the air guide groove.

[0014] As a preferred solution of the present invention, an adhesive feeder is installed on the other mounting frame, and the adhesive feeder is arranged in a straight line with the flattening mechanism.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention uniformly flattens the sample powder by a flattening mechanism and controls the powder particle size by a feeding mechanism, thereby reducing the preferential orientation phenomenon of crystals in the sample caused by excessive pressure or improper methods, reducing the diffraction line broadening phenomenon, and improving the clarity of the diffraction pattern and the intensity measurement accuracy of the diffraction peak. In addition, the automated feeding and flattening process reduces the uncertainty of manual operation, ensures that the powder in each sample box is evenly distributed and has a consistent thickness, and improves the repeatability of the experimental data.

[0016] 2. The present invention realizes the synchronous lifting and lowering of the pressing plate and the material distribution box by setting a connecting piece between the flattening mechanism and the feeding mechanism. This design not only simplifies the structure, but also realizes the automatic cleaning of the powder and the shaking and dispersion of the screen through the up and down movement of the material distribution box, further improving the practicality and efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] Figure 1 The present invention provides an overall structure diagram of an automatic preparation device for powder samples of an X-ray diffractometer sample rack Figure 1 ; Figure 2 The present invention provides an overall structure diagram of an automatic preparation device for powder samples of an X-ray diffractometer sample rack Figure 2 ; Figure 3 Provide a cross-sectional view of the sample holder of the present invention Figure 1 ; Figure 4 Provide a cross-sectional view of the sample holder of the present invention Figure 2 ; Figure 5 Provides a front structural cross-sectional view of a flattening mechanism and a feeding mechanism for the present invention; Figure 6 A schematic diagram of the connection structure of a flattening mechanism and a feeding mechanism is provided for the present invention.

[0019] The numbers in the figure represent the following: 1. Sample table; 2. Sample rack; 3. Sample box; 4. Round positioning plate; 5. Placement table; 6. Mounting frame; 7. Feeding mechanism; 8. Flattening mechanism; 9. Driving mechanism; 10. Through slot; 11. Slide rail; 12. Adhesive feeder; 71. material distribution box; 72. screen; 73. bellows; 74. feed pipe; 75. control valve; 76. connecting pipe; 81. pressure plate; 82. protective cover; 83. electric push rod; 84. collar; 85. fixing rod; 86. fixing frame; 87. scraper; 91. mounting plate; 92. driving gear; 93. air guide groove; 94. mounting groove; 95. tooth plate; 96. filter; 97. air pump. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figure 1 - Figure 6 As shown, the present invention provides an automatic preparation device for powder samples of an X-ray diffractometer sample rack, comprising a sample table 1, on which a sample rack 2 is arranged, and on which a plurality of sample boxes 3 are sequentially placed, so as to facilitate batch processing of samples. The sample table 1 comprises a circular positioning plate 4, two placing tables 5, two mounting frames 6, a feeding mechanism 7 for conveying sample powder into the sample box 3, a flattening mechanism 8 for flattening the sample powder in the sample box 3, and a driving mechanism 9 for driving the sample rack 2 to move along the length direction of the placing table 5 and pass through the circular positioning plate 4. The circular positioning plate 4 is vertically installed inside the X-ray diffractometer, the two placing tables 5 are horizontally arranged on both sides of the circular positioning plate 4, a through slot 10 for the sample rack 2 to pass through is opened on the circular positioning plate 4, and two mounting frames 6 are symmetrically arranged on both sides of the top of the circular positioning plate 4, the feeding mechanism 7 and the flattening mechanism 8 are sequentially arranged on one of the mounting frames 6 and are located directly above the sample rack 2, and the driving mechanism 9 is installed on one side of one of the placing tables 5 and is transmission-connected to the sample rack 2.

[0022] The two placement tables 5 are both provided with slide rails 11 , and the sample rack 2 is slidably arranged on the slide rails 11 .

[0023] The present invention installs the sample table 1 inside the X-ray diffractometer. When in use, the driving mechanism 9 drives the sample rack 2 to move along the slide rail 11, ensuring that the sample box 3 can pass through the loading mechanism 7 and the flattening mechanism 8 in sequence. When the sample box 3 moves to the bottom of the loading mechanism 7, the sample powder is evenly transported to the groove inside the sample box 3 through the loading mechanism 7.

[0024] The feeding mechanism 7 includes a distribution box 71, a screen 72 and a bellows 73. A feed pipe 74 is inserted into the mounting frame 6 on the same side as the flattening mechanism 8. The bellows 73 is fixedly connected to the bottom of the feed pipe 74. The distribution box 71 is fixedly connected to the bottom of the bellows 73. The screen 72 is fixedly connected to the inner bottom of the distribution box 71. A control valve 75 is installed on the feed pipe 74.

[0025] The feed pipe 74 is connected to the external storage device, and the powder sample is accurately delivered through the feed pipe 74 and the control valve 75. When the sample powder enters the distribution box 71 from the feed pipe 74 through the bellows 73, the sample powder is then sieved by the screen 72 and falls into the sample box 3. The screen 72 is used to control the particle size of the powder to ensure the uniformity of the sample powder. This can ensure that the sample is evenly distributed during the tableting process, reduce the directional arrangement of the particles, and effectively reduce the preferential orientation of the sample during the tableting process, thereby improving the accuracy and reliability of the detection.

[0026] Furthermore, the flattening mechanism 8 includes a pressing plate 81, a protective cover 82 and an electric push rod 83. The electric push rod 83 is installed on the mounting frame 6. The protective cover 82 is fixed on the output end of the electric push rod 83, and the protective cover 82 faces the sample box 3 and is adapted to the sample box 3. The pressing plate 81 is fixed at the middle position inside the protective cover 82, and the pressing plate 81 is adapted to the groove of the sample box 3. A micro vacuum pump is installed on the protective cover 82, and the output end of the micro vacuum pump passes through the protective cover 82 and extends into the interior thereof.

[0027] The protective cover 82 and the pressure plate 81 inside it are driven downward by the electric push rod 83 until the pressure plate 81 moves to contact the powder in the groove in the middle of the sample box 3 and gently flattens it. At the same time, the protective cover 82 moves downward and closes the upper surface of the sample box 3. At this time, the protective cover 82 forms a closed annular channel, and then the micro-vacuum pump is started to extract the sample powder on the surface of the sample box 3 except the groove, so as to achieve the effect of cleaning the upper surface of the sample box 3. After the tableting process is completed, if the sample powder inside the sample box 3 is uneven or uneven, at this time, the sample rack 2 can be moved back to the bottom of the feeding mechanism 7 by the driving mechanism 9, and the feeding operation is repeated. The design of the protective cover 82 and the micro-vacuum pump can prevent the powder from flying. At the same time, the vacuum operation of the micro-vacuum pump can reduce the powder residue on the upper surface of the sample box 3 to avoid affecting the subsequent detection results. Among them, the pressure plate 81 is adapted to the groove of the sample box 3 to ensure that the powder is evenly distributed during the flattening process to avoid the phenomenon of preferential orientation.

[0028] The present invention uniformly flattens the sample powder by the flattening mechanism 8 and controls the powder particle size by the screen 72, thereby reducing the preferential orientation phenomenon of crystals in the sample caused by excessive pressure or improper methods, reducing the broadening of diffraction lines, and improving the clarity of the diffraction pattern and the measurement accuracy of the intensity of the diffraction peak. In addition, the automated loading and flattening process reduces the uncertainty of human operation, ensuring that the powder in each sample box 3 is evenly distributed and has a consistent thickness, thereby improving the repeatability of the experimental data.

[0029] The design of the protective cover 82 and the micro vacuum pump effectively prevents powder from scattering, and avoids sample powder from remaining on the upper surface of the sample box 3, thereby affecting subsequent test results.

[0030] Furthermore, a connecting piece is connected between the flattening mechanism 8 and the feeding mechanism 7, and the connecting piece includes two rings 84 and a fixed rod 85. A connecting tube 76 is detachably connected to the dispensing box 71, and the connecting tube 76 is sleeved on the corrugated tube 73. The two rings 84 are fixedly sleeved on the electric push rod 83 and the connecting tube 76, respectively. The fixed rod 85 is located between the two rings 84, and the two ends of the fixed rod 85 are fixedly connected to the outer walls of the two rings 84, respectively.

[0031] The bottom of the fixing rod 85 is fixedly connected to a fixing frame 86, and the bottom of the fixing frame 86 is detachably connected to a scraper 87; When the sample holder 2 moves under the scraper 87 , the scraper 87 comes into contact with the upper surface of the sample box 3 .

[0032] By setting a connecting piece between the flattening mechanism 8 and the feeding mechanism 7, the feeding mechanism 7 and the flattening mechanism 8 are fixed by a fixing rod 85 and two rings 84, so as to synchronously fix the lifting and lowering positions of the pressing plate 81 and the distribution box 71, and integrate the two mechanisms into a linkage system through the connecting piece, thereby reducing the number of independent driving components and reducing the complexity and cost of the device.

[0033] When the electric push rod 83 drives the pressure plate 81 to rise and fall, it can also drive the distribution box 71 to rise and fall synchronously. When the distribution box 71 moves up and down, the bellows 73 is stretched and compressed, and the powder adhered to its inner wall falls off due to the vibration generated by the deformation, thereby achieving automatic cleaning. In addition, the up and down movement of the distribution box 71 causes the powder on the screen 72 to shake continuously, thereby improving the dispersion and screening efficiency of the powder and ensuring that the powder particle size is uniform. Furthermore, the screen 72 can be elastically fixed so that it can produce a larger shaking amplitude when the distribution box 71 moves up and down, thereby enhancing the powder dispersion effect.

[0034] By providing a connecting piece between the flattening mechanism 8 and the feeding mechanism 7, the synchronous lifting and lowering of the pressing plate 81 and the material distribution box 71 is realized. This design not only simplifies the structure, but also realizes the automatic cleaning of the powder and the shaking and dispersion of the screen 72 through the up and down movement of the material distribution box 71, further improving the practicality and efficiency of the device.

[0035] Furthermore, a fixing frame 86 is installed at the bottom of the fixing rod 85, and a scraper 87 is installed at the bottom of the fixing frame 86. When the driving mechanism 9 drives the sample rack 2 to move along the slide rail 11, multiple sample boxes 3 above the sample rack 2 can pass under the scraper 87, so that the powder on the sample box 3 can be scraped flat, ensuring the flatness of the powder in the groove of the sample box 3, and the excess powder is scraped onto the surface of the sample rack 2, avoiding the interference of excess powder on subsequent flattening and diffraction analysis, providing better working conditions for the flattening mechanism 8, and ensuring the flattening effect of the sample.

[0036] It is worth noting that the scraper 87 can be made of wear-resistant material, has a certain elasticity, and can adapt to the slight unevenness of the surface of the sample box 3.

[0037] Among them, the driving mechanism 9 includes a mounting plate 91 and two driving gears 92. The mounting plate 91 is fixedly arranged on one side of the top of one of the placement tables 5. An air guide groove 93 and a mounting groove 94 are sequentially opened inside the mounting plate 91 from top to bottom. The two driving gears 92 are rotatably arranged on both sides of the mounting groove 94 respectively. A transmission belt is connected between the two driving gears 92. A motor is installed outside the mounting plate 91. The motor output shaft extends into the mounting groove 94 after passing through the mounting plate 91, and the motor output shaft is fixedly connected to the rotating shaft of one of the driving gears 92. A tooth plate 95 is fixedly connected to one side of the outer wall of the sample rack 2. The tooth plate 95 faces the mounting groove 94, and the gear is meshed with the tooth plate 95.

[0038] One of the driving gears 92 is driven to rotate by a motor, and the two driving gears 92 are driven to rotate synchronously by a transmission belt. The driving gear 92 is meshed with the toothed plate 95. Therefore, when the driving gear 92 rotates, it can drive the toothed plate 95 to move along the slide rail 11, thereby realizing the automatic conveying function of the sample rack 2, realizing the continuous preparation of batch samples, and significantly improving the experimental efficiency.

[0039] The X-ray diffractometer sample rack 2 powder sample automatic preparation device effectively solves the problems of preferred orientation, uneven powder particle size, improper flattening method, etc. in traditional sample preparation through automated design and multi-mechanism collaboration, and significantly improves the standardization of sample preparation and the accuracy of experimental data. At the same time, the efficiency and flexibility of the device also provide convenience for scientific researchers and are suitable for a wide range of applications in fields such as mineral composition analysis.

[0040] A filter screen 96 is provided at the opening of the air guide groove 93 , and the opening faces the upper surface of the sample rack 2 . An air pump 97 is provided on one side of the mounting plate 91 , and the input end of the air pump 97 passes through the mounting plate 91 and extends to the inside of the air guide groove 93 .

[0041] The air guide groove 93 and the air delivery pump 97 are designed to clean the residual powder on the surface of the sample rack 2 to ensure the cleanliness of the sample rack 2.

[0042] An adhesive feeder 12 is mounted on the other mounting frame 6 , and the adhesive feeder 12 is arranged in a straight line with the flattening mechanism 8 .

[0043] An adhesive feeder 12 is installed on another mounting frame 6. If the sample powder sample (such as some metal powders, inorganic mineral powders, etc.) has poor self-adhesiveness and is difficult to compact (normal tableting does not require use), the staff can choose to add an adhesive according to the test needs to enhance the stability of the sample. The addition of the adhesive feeder 12 makes the sample more stable after flattening, ensuring that the sample will not fall out of the sample box 3 or move during the test process, affecting the test results. In addition, when there are large differences in the particle size, density, etc. of each component in the sample, it may cause uneven distribution during tableting. Adding an adhesive helps to make the sample powders of different components more evenly mixed and distributed, so that the sample has more consistent physical properties in the entire tableting area, thereby improving the accuracy and repeatability of the diffraction data.

[0044] The protection scope of the application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the application within the essence and protection scope of the application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the application.

Claims

1. An automatic preparation device for powder samples of an X-ray diffractometer sample rack, comprising a sample stage (1), characterized in that: The sample stage (1) is provided with a sample rack (2), on which a plurality of sample boxes (3) are sequentially placed, the sample stage (1) comprising a circular positioning plate (4), two placement tables (5), two mounting frames (6), a loading mechanism (7) for conveying sample powder into the sample box (3), a flattening mechanism (8) for flattening the sample powder in the sample box (3), and a driving mechanism (9) for driving the sample rack (2) to move along the length direction of the placement table (5) and pass through the circular positioning plate (4), wherein the circular positioning plate (4) The device is vertically mounted inside the X-ray diffractometer, wherein two placement tables (5) are horizontally arranged on both sides of a circular positioning plate (4), the circular positioning plate (4) is provided with a through slot (10) for the sample rack (2) to pass through, the two mounting frames (6) are symmetrically arranged on both sides of the top of the circular positioning plate (4), the loading mechanism (7) and the flattening mechanism (8) are arranged on one of the mounting frames (6) in sequence and are located directly above the sample rack (2), and the driving mechanism (9) is installed on one side of one of the placement tables (5) and is transmission-connected to the sample rack (2).

2. The automatic preparation device for powder samples of X-ray diffractometer sample rack according to claim 1, characterized in that: The flattening mechanism (8) comprises a pressing plate (81), a protective cover (82) and an electric push rod (83), wherein the electric push rod (83) is mounted on the mounting frame (6), the protective cover (82) is fixed on the output end of the electric push rod (83), and the protective cover (82) faces the sample box (3) and matches the sample box (3), the pressing plate (81) is fixed at a middle position inside the protective cover (82), and the pressing plate (81) matches the groove of the sample box (3), and a micro air pump is mounted on the protective cover (82), and the output end of the micro air pump passes through the protective cover (82) and extends into the interior thereof.

3. The automatic preparation device for powder samples of X-ray diffractometer sample rack according to claim 1, characterized in that: The feeding mechanism (7) comprises a material distribution box (71), a screen (72) and a bellows (73); a feed pipe (74) is inserted on the mounting frame (6) on the same side as the flattening mechanism (8); the bellows (73) is fixedly connected to the bottom of the feed pipe (74); the material distribution box (71) is fixedly connected to the bottom of the bellows (73); the screen (72) is fixedly connected to the inner bottom of the material distribution box (71); and a control valve (75) is installed on the feed pipe (74).

4. The automatic preparation device for powder samples of X-ray diffractometer sample rack according to claim 3, characterized in that: A connecting piece is connected between the flattening mechanism (8) and the feeding mechanism (7), the connecting piece comprising two sleeves (84) and a fixing rod (85); a connecting pipe (76) is detachably connected to the material distribution box (71); the connecting pipe (76) is sleeved on the corrugated pipe (73); the two sleeves (84) are respectively fixedly sleeved on the electric push rod (83) and the connecting pipe (76); the fixing rod (85) is located between the two sleeves (84), and the two ends of the fixing rod (85) are respectively fixedly connected to the outer walls of the two sleeves (84).

5. The automatic preparation device for powder samples of X-ray diffractometer sample rack according to claim 4, characterized in that: The bottom of the fixing rod (85) is fixedly connected to a fixing frame (86), and the bottom of the fixing frame (86) is detachably connected to a scraper (87); When the sample rack (2) moves under the scraper (87), the scraper (87) comes into contact with the upper surface of the sample box (3).

6. The automatic preparation device for powder samples of X-ray diffractometer sample rack according to claim 1, characterized in that: The driving mechanism (9) comprises a mounting plate (91) and two driving gears (92). The mounting plate (91) is fixedly arranged on one side of the top of one of the placement tables (5). The mounting plate (91) is provided with an air guide groove (93) and a mounting groove (94) in sequence from top to bottom. The two driving gears (92) are rotatably arranged on both sides of the mounting groove (94) respectively. A transmission belt is connected between the two driving gears (92). A motor is installed outside the mounting plate (91). The output shaft of the motor passes through the mounting plate (91) and extends into the mounting groove (94). The output shaft of the motor is fixedly connected to the rotating shaft of one of the driving gears (92). A toothed plate (95) is fixedly connected to one side of the outer wall of the sample rack (2). The toothed plate (95) faces the mounting groove (94), and the gear is meshed with the toothed plate (95).

7. The automatic preparation device for powder samples of X-ray diffractometer sample rack according to claim 1, characterized in that: Both of the placement tables (5) are provided with slide rails (11), and the sample rack (2) is slidably arranged on the slide rails (11).

8. The automatic preparation device for powder samples of X-ray diffractometer sample rack according to claim 6, characterized in that: A filter screen (96) is provided at the opening of the air guide groove (93), and the opening faces the upper surface of the sample rack (2). An air pump (97) is provided on one side of the mounting plate (91), and the input end of the air pump (97) passes through the mounting plate (91) and extends into the interior of the air guide groove (93).

9. The automatic preparation device for powder samples of X-ray diffractometer sample rack according to claim 1, characterized in that: An adhesive feeder (12) is mounted on the other mounting frame (6), and the adhesive feeder (12) and the flattening mechanism (8) are arranged in a straight line.

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