Perforated powder reverse filling device of x-ray diffractometer

Abstract

The invention discloses a perforated powder reverse filling device for an x-ray diffractometer, and relates to the technical field of experimental equipment. The sample table comprises a circular positioning plate, a sample frame, a flattening mechanism used for flattening sample powder in the sample box, an abutting mechanism used for sealing an opening of the sample box, and a driving mechanism used for driving the sample box to enter the abutting mechanism. Through cooperation of the pressing mechanism and the piston cylinder, the uniformity and consistency of the sample are ensured, particle distribution of the sample is more random, the influence of the preferred orientation of the sample is reduced, a more accurate diffraction pattern is obtained, multiple times of slicking is not needed, and the situation that multiple times of flattening is needed due to unevenness of powder is avoided; and the lattice of the sample powder after long-time grinding is damaged.

Description

Technical Field

[0001] The invention relates to the technical field of experimental equipment, and in particular to a perforated powder reverse filling device for an X-ray diffractometer. Background Art

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

[0003] The main material of conventional X-ray diffraction analysis is in powder form, and the shape of many powder particles deviates greatly from the ideal state (needle-shaped, flake-shaped, etc.). When conventional powder samples are prepared, they are prone to preferential orientation, resulting in deviations in the distribution of diffraction intensity, affecting the accuracy of the diffraction result analysis.

[0004] In the prior art, the powder sample specimen preparation device for X-ray diffractometer includes a flat bottom plate, a sample sheet and a tablet pressing plate from bottom to top, and a sample slot for holding the powder sample is provided on the sample sheet. When the powder sample needs to be pressed, the staff needs to add the powder sample to be analyzed into the sample slot, cover the tablet pressing plate on the upper surface of the sample sheet, and use finger pressure or palm pressure to shape the powder sample in the sample slot. When flattening the sample, the powder distribution may be uneven, and particles may easily aggregate or have gaps, affecting the diffraction peak intensity and data accuracy. In addition, pressing the powder sample may cause a rough surface, increase background noise, and reduce the signal-to-noise ratio.

[0005] In view of the above problems, a perforated powder reverse filling device for an X-ray diffractometer is proposed. Summary of the invention

[0006] The object of the present invention is to provide a perforated powder reverse filling device for an X-ray diffractometer to solve the above problems.

[0007] In order to solve the above technical problems, the present invention specifically provides the following technical solutions: A perforated powder reverse filling device for an X-ray diffractometer comprises a sample stage, a sample box is arranged on the sample stage, the sample stage comprises a circular positioning plate, a sample holder, a flattening mechanism for flattening sample powder in the sample box, a pressing mechanism for closing an opening of the sample box, and a driving mechanism for driving the sample box to enter the pressing mechanism, the circular positioning plate is vertically mounted inside the X-ray diffractometer, the sample holder is horizontally mounted on one side of the circular positioning plate, the flattening mechanism is mounted on a side of an outer wall of the circular positioning plate close to the sample holder and is located directly above the sample holder, the pressing mechanism is mounted on one side of a top of the sample holder, a mounting groove is provided on the sample holder, the driving mechanism is mounted in the mounting groove, and the sample box is drivingly connected to the driving mechanism, a side plate is fixedly connected to a side of the top of the sample holder close to the circular positioning plate, a rotating motor is mounted on a side of an outer wall of the circular positioning plate away from the sample holder, and an output shaft of the rotating motor is fixedly connected to the side plate after passing through the circular positioning plate; When the sample box enters the pressing mechanism, the rotating motor drives the sample rack to flip.

[0008] As a preferred solution of the present invention, the sample box includes an arc-shaped sleeve, a hollow column, a sealing cover and two elastic members. The arc-shaped sleeve is slidably arranged in the installation groove, the hollow column is slidably arranged inside the arc-shaped sleeve, the sealing cover is detachably connected to the bottom of the hollow column, and the sealing cover is located at the bottom of the arc-shaped sleeve. Grooves are provided on both sides of the interior of the arc-shaped sleeve, and the two elastic members are respectively arranged in the two grooves.

[0009] As a preferred solution of the present invention, the elastic member includes a card plate and a first spring, one end of the card plate is fixedly connected to the outer wall of the hollow column, and the card plate is slidably connected to the groove, the first spring is arranged inside the groove, and one end of the first spring is connected to the bottom surface of the groove, and the other end of the first spring is in contact with the bottom surface of the card plate.

[0010] As a preferred scheme of the present invention, the flattening mechanism includes a cross bar, a mounting bracket, a rotating rod, a push rod, a pressure plate and a second spring, the cross bar is fixed on one side of the outer wall of the circular positioning plate, the mounting bracket is fixedly mounted on the bottom of the cross bar, the rotating rod is rotatably set at the bottom of the mounting bracket, a sliding groove is opened inside the rotating rod, the push rod is slidably set inside the sliding groove, the pressure plate is located under the push rod and is fixedly connected to one end of the push rod, the second spring is set inside the sliding groove, and the two ends of the second spring respectively conflict with the push rod and the inner top wall of the rotating rod, a driving motor is installed on one side of the outer wall of the mounting bracket, and the output shaft of the driving motor is fixedly connected to a rotating shaft, and the rotating shaft sequentially passes through the mounting bracket and the rotating rod and is fixedly connected to the rotating rod.

[0011] As a preferred solution of the present invention, the pressing mechanism includes a U-shaped cover plate, a piston cylinder and a pneumatic component, wherein the U-shaped cover plate is fixedly arranged on one side of the top of the sample rack close to the side plate, a through groove is provided at the bottom of the sample rack and directly below the U-shaped cover plate, the piston cylinder is fixedly connected to the top wall inside the U-shaped cover plate, the pneumatic component is installed on one side of the inside of the U-shaped cover plate close to the side plate, and an air guide pipe is connected between the pneumatic component and the piston cylinder; When the driving mechanism drives the sample box to enter the interior of the U-shaped cover plate and abut against the gas pressure piece, the gas in the piston cylinder increases and pushes the hollow column downward.

[0012] As a preferred solution of the present invention, the pneumatic component includes an air cylinder, a piston plate, a third spring and a pressing plate. The air cylinder is fixedly connected to one side of the side plate and is located in the mounting groove. The piston plate is axially sealed and slidably connected to the inside of the air cylinder. The pressing plate is fixedly connected to the side of the outer wall of the piston plate away from the air cylinder. The third spring is arranged inside the air cylinder and extends into the piston plate, and the two ends of the third spring are respectively in conflict with the air cylinder and the piston plate, and the air guide pipe is connected to the air cylinder.

[0013] As a preferred solution of the present invention, both sides of the outer wall of the arc-shaped sleeve are detachably connected with connecting blocks, and the two connecting blocks are both drivingly connected to the driving mechanism.

[0014] As a preferred solution of the present invention, the bottom of the pressure plate is arc-shaped, and the width of the pressure plate is greater than the inner diameter of the hollow column.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention rotates and flattens the sample on the sample box through a flattening mechanism, wherein the arc-shaped bottom design of the pressing plate enables it to completely fit with the surface of the sample box and press the powder along the arc-shaped path to ensure that the powder is evenly stressed, so that the sample powder is flattened more evenly and flatly, ensuring that the sample powder fills the interior of the sample box, providing high-quality samples for subsequent X-ray diffraction analysis, and the sample box generates a reaction force on the pressing plate, causing the push rod to slide in the slide groove and compress the second spring to form a buffering effect. This buffering effect can avoid the directional arrangement of particles of the powder due to excessive flattening, ensure the natural state of the sample powder, and reduce interference with the measurement results. The elastic design of the second spring makes the flattening process smoother, avoids impact on the sample box and powder, and improves the stability and safety of the operation.

[0016] 2. The present invention can flip the sample after it is flattened. The particle distribution of the flipped sample is more random, which reduces the influence of the sample's preferential orientation. The cooperation of the pressing mechanism and the piston cylinder ensures the uniformity and consistency of the sample, making the particle distribution of the sample more random, reducing the influence of the sample's preferential orientation, thereby obtaining a more accurate diffraction pattern. In addition, the present invention only needs to flatten the powder on the sample box to ensure that the surface of the sample powder is smoother, more uniform and denser, without the need for multiple scraping, thereby avoiding the destruction of the lattice of the sample powder after long-term grinding due to the need for multiple flattening of the uneven powder. 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 structural schematic diagram of a perforated powder reverse filling device for an X-ray diffractometer; Figure 2 A bottom view of a perforated powder reverse filling device for an x-ray diffractometer is provided for the present invention; Figure 3 The present invention provides a front structural cross-sectional view of a perforated powder reverse filling device for an X-ray diffractometer; Figure 4 The present invention provides Figure 3 A magnified view of the structure at A; Figure 5 The present invention provides Figure 3 A magnified view of the structure at B; Figure 6 A structural schematic diagram of a flattening mechanism is provided for the present invention; Figure 7 A top view of a sample holder is provided for the present invention; Figure 8 A structural schematic diagram of a sample box is provided for the present invention.

[0019] The numbers in the figure represent the following: 1. Sample stage; 2. Sample box; 3. Round positioning plate; 4. Sample rack; 5. Flattening mechanism; 6. Pressing mechanism; 7. Driving mechanism; 8. Mounting slot; 9. Side plate; 10. Rotating motor; 21. arc sleeve; 22. hollow column; 23. sealing cover; 24. connecting block; 25. groove; 26. clamping plate; 27. first spring; 51. cross bar; 52. mounting frame; 53. rotating rod; 54. push rod; 55. pressure plate; 56. second spring; 57. slide groove; 61. U-shaped cover plate; 62. piston cylinder; 63. pneumatic part; 64. through groove; 65. air guide tube; 66. air storage cylinder; 67. piston plate; 68. third spring; 69. pressing plate. 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 8 As shown, the present invention provides a perforated powder reverse filling device for an X-ray diffractometer, comprising a sample stage 1, on which a sample box 2 is arranged, the sample stage 1 comprises a circular positioning plate 3, a sample rack 4, a flattening mechanism 5 for flattening the sample powder in the sample box 2, a pressing mechanism 6 for closing the opening of the sample box 2, and a driving mechanism 7 for driving the sample box 2 to enter the pressing mechanism 6, the circular positioning plate 3 is vertically installed inside the X-ray diffractometer, the sample rack 4 is horizontally arranged on one side of the circular positioning plate 3, the flattening mechanism 5 is arranged on a side of the outer wall of the circular positioning plate 3 close to the sample rack 4, and is located directly above the sample rack 4, the pressing mechanism 6 is installed on one side of the top of the sample rack 4, a mounting groove 8 is opened on the sample rack 4, the driving mechanism 7 is installed in the mounting groove 8, and the sample box 2 is drivingly connected to the driving mechanism 7, a side plate 9 is fixedly connected to the top of the sample rack 4 close to the circular positioning plate 3, a rotating motor 10 is installed on the side of the outer wall of the circular positioning plate 3 away from the sample rack 4, and the output shaft of the rotating motor 10 passes through the circular positioning plate 3 and is fixedly connected to the side plate 9; When the sample box 2 enters the pressing mechanism 6 , the rotating motor 10 drives the sample rack 4 to turn over.

[0022] When the present invention is in use, the sample box 2 is first installed in the installation groove 8, and the sample powder is added into the sample box 2. The sample box 2 includes an arc sleeve 21, a hollow column 22, a cover 23 and two elastic members. The arc sleeve 21 is slidably set in the installation groove 8, the hollow column 22 is slidably set inside the arc sleeve 21, the cover 23 is detachably connected to the bottom of the hollow column 22, and the cover 23 is located at the bottom of the arc sleeve 21. Grooves 25 are opened on both sides of the arc sleeve 21, and the two elastic members are respectively set in the two grooves 25.

[0023] The elastic member includes a card plate 26 and a first spring 27. One end of the card plate 26 is fixedly connected to the outer wall of the hollow column 22, and the card plate 26 is slidably connected to the groove 25. The first spring 27 is arranged inside the groove 25, and one end of the first spring 27 is connected to the bottom surface of the groove 25, and the other end of the first spring 27 is in contact with the bottom surface of the card plate 26.

[0024] Connecting blocks 24 are detachably connected to both sides of the outer wall of the arc-shaped sleeve 21 , and both connecting blocks 24 are drivingly connected to the driving mechanism 7 .

[0025] The sample powder is evenly sprinkled into the middle of the hollow column 22, and then the powder of the sample box 2 is flattened by the flattening mechanism 5. The flattening mechanism 5 includes a cross bar 51, a mounting frame 52, a rotating rod 53, a push rod 54, a pressure plate 55 and a second spring 56. The cross bar 51 is fixed to one side of the outer wall of the circular positioning plate 3, the mounting frame 52 is fixedly mounted at the bottom of the cross bar 51, the rotating rod 53 is rotatably set at the bottom of the mounting frame 52, a slide groove 57 is opened inside the rotating rod 53, the push rod 54 is slidably set inside the slide groove 57, the pressure plate 55 is located below the push rod 54 and is fixedly connected to one end of the push rod 54, the second spring 56 is set inside the slide groove 57, and the two ends of the second spring 56 are respectively in conflict with the push rod 54 and the inner top wall of the rotating rod 53, a driving motor is installed on one side of the outer wall of the mounting frame 52, and the output shaft of the driving motor is fixedly connected with a rotating shaft, and the rotating shaft passes through the mounting frame 52 and the rotating rod 53 in sequence and is fixedly connected to the rotating rod 53.

[0026] The bottom of the pressing plate 55 is arc-shaped, and the width of the pressing plate 55 is greater than the inner diameter of the hollow column 22 .

[0027] Specifically, the driving motor (the driving motor is a prior art, and the specific installation method can be installed according to actual conditions, so it is not shown in the figure) drives the rotating shaft to rotate, and the rotating shaft drives the rotating rod 53 to rotate and drives the push rod 54 and the pressing plate 55 at the bottom thereof to rotate toward the sample box 2. When the pressing plate 55 rotates to the top of the sample box 2 and flattens the powder on the sample box 2, the sample powder fills the inside of the sample box 2, thereby realizing automatic flattening of the sample powder, reducing manual intervention, and improving operating efficiency. Among them, the bottom of the pressing plate 55 is arranged in an arc shape. When the bottom of the pressing plate 55 contacts the top of the sample box 2, the arc bottom of the pressing plate 55 is completely in contact with the surface of the sample box 2. The arc bottom design of the pressing plate 55 enables it to completely fit with the surface of the sample box 2 and press the powder along the arc path. , ensuring that the powder is evenly stressed, so that the sample powder is flattened more evenly and flatly, ensuring that the sample powder fills the interior of the sample box 2, and providing high-quality samples for subsequent X-ray diffraction analysis. Among them, when the pressing plate 55 is pressed to the top of the sample box 2, the rotating rod 53 continues to drive the pressing plate 55 to rotate. When the pressing plate 55 is pressed to the top of the sample box 2, the sample box 2 generates a reaction force on the pressing plate 55, causing the push rod 54 to slide in the slide groove 57 and compress the second spring 56 to form a buffering effect. This buffering effect can avoid the directional arrangement of particles caused by excessive flattening of the powder, ensure the natural state of the sample powder, and reduce interference with the measurement results. In addition, the elastic design of the second spring 56 makes the flattening process smoother, avoids impact on the sample box 2 and the powder, and improves the stability and safety of the operation.

[0028] Through the coordinated work of the driving motor, the rotating rod 53, the pushing rod 54, the pressing plate 55 and the second spring 56, the automatic flattening of the sample powder is achieved. The arc design of the pressing plate 55 can also ensure the uniform flattening of the powder, reducing the gaps between the particles, so that the sample can provide a more consistent diffraction signal under X-ray irradiation, avoiding the reduction of the signal-to-noise ratio due to the uneven surface of the powder in the sample box 2, and the buffering effect of the second spring 56 avoids excessive flattening, ensuring the natural state of the sample, and significantly improving the efficiency and accuracy of the X-ray diffractometer sample processing.

[0029] The pressing mechanism 6 includes a U-shaped cover plate 61, a piston cylinder 62 and a gas pressure piece 63. The U-shaped cover plate 61 is fixedly arranged on one side of the top of the sample rack 4 close to the side plate 9. A through groove 64 is provided at the bottom of the sample rack 4 and directly below the U-shaped cover plate 61. The piston cylinder 62 is fixedly connected to the top wall of the U-shaped cover plate 61. The gas pressure piece 63 is installed on one side of the inside of the U-shaped cover plate 61 close to the side plate 9. An air guide pipe 65 is connected between the gas pressure piece 63 and the piston cylinder 62. When the driving mechanism 7 drives the sample box 2 to enter the U-shaped cover 61 and abut against the gas pressure member 63 , the gas in the piston cylinder 62 increases and pushes the hollow column 22 downward.

[0030] The pneumatic component 63 includes an air cylinder 66, a piston plate 67, a third spring 68 and a pressing plate 69. The air cylinder 66 is fixedly connected to one side of the side plate 9 and is located in the mounting groove 8. The piston plate 67 is axially sealed and slidably connected to the inside of the air cylinder 66. The pressing plate 69 is fixedly connected to the side of the outer wall of the piston plate 67 away from the air cylinder 66. The third spring 68 is arranged in the air cylinder 66, and the two ends of the third spring 68 are respectively in conflict with the air cylinder 66 and the piston plate 67. The air guide pipe 65 is connected to the air cylinder 66.

[0031] Among them, the piston cylinder 62 is an axial sliding seal with a slide rod inside the cylinder body, and a compression spring is configured as needed. This is the prior art.

[0032] When the powder in the sample box 2 is flattened, the driving mechanism 7 drives the sample box 2 to move along the inside of the installation groove 8 to the bottom of the U-shaped cover plate 61, until the sample box 2 moves to the outer wall of the arc sleeve 21 and contacts the pressing plate 69. At this time, the sample box 2 continues to move and pushes the pressing plate 69, so that the piston plate 67 moves along the inside of the gas storage cylinder 66 and squeezes the third spring 68. After the gas inside the gas storage cylinder 66 is compressed, it is transported to the inside of the piston cylinder 62 through the air guide pipe 65. As the gas inside the piston cylinder 62 increases, the gas pressure pushes the piston cylinder 62. The movable slide rod extends out and contacts the top of the hollow column 22, and pushes the hollow column 22 to move downward from the inside of the arc sleeve 21 until the cover 23 at the bottom of the hollow column 22 extends out from the through slot 64, and then the side plate 9 is driven to rotate by the rotating motor 10, so as to flip the sample box 2. After the sample box 2 is flipped, its cover 23 is located at the top, and the cover 23 at the bottom of the hollow column 22 is detachably connected to the hollow column 22. After the sample is flipped, the cover 23 is taken out to facilitate the detection of the sample powder by the X-ray diffractometer.

[0033] The present invention can flip the sample after it is flattened. The particle distribution of the flipped sample is more random, which reduces the influence of the sample's preferential orientation. Moreover, through the cooperation of the pressing mechanism 6 and the piston cylinder 62, the uniformity and consistency of the sample can be ensured, and the particle distribution of the sample is more random, which reduces the influence of the sample's preferential orientation, thereby obtaining a more accurate diffraction spectrum. In addition, in the present invention, it is only necessary to compact the powder on the sample box 2 to ensure that the surface of the sample powder at the bottom of the sample box is flat, uniform and dense, without the need for multiple scraping. Compared with the prior art, it can avoid the problem of lattice destruction caused by the sample powder after long-term grinding due to the need for multiple flattening due to uneven powder.

[0034] When the bottom of the sliding rod presses against the surface of the hollow column 22, the sample powder is pressed twice to ensure that the sample surface is smoother.

[0035] It is worth noting that in order for the slide rod to push the hollow column 22 out of the arc sleeve 21 , the diameter of the slide rod in the piston cylinder 62 is equal to or slightly smaller than the diameter of the hollow column 22 .

[0036] 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. A perforated powder reverse filling device for an X-ray diffractometer, comprising a sample stage (1), characterized in that: A sample box (2) is arranged on the sample stage (1), and the sample stage (1) comprises a circular positioning plate (3), a sample holder (4), a flattening mechanism (5) for flattening sample powder in the sample box (2), a pressing mechanism (6) for closing an opening of the sample box (2), and a driving mechanism (7) for driving the sample box (2) to enter the pressing mechanism (6), wherein the circular positioning plate (3) is vertically mounted inside the X-ray diffractometer, the sample holder (4) is horizontally arranged on one side of the circular positioning plate (3), and the flattening mechanism (5) is arranged on a side of an outer wall of the circular positioning plate (3) close to the sample holder (4). , and is located directly above the sample rack (4), the pressing mechanism (6) is installed on one side of the top of the sample rack (4), the sample rack (4) is provided with a mounting groove (8), the driving mechanism (7) is installed in the mounting groove (8), and the sample box (2) is drivingly connected to the driving mechanism (7), the top of the sample rack (4) close to the circular positioning plate (3) is fixedly connected to a side plate (9), the outer wall of the circular positioning plate (3) is installed on the side away from the sample rack (4), and the output shaft of the rotating motor (10) passes through the circular positioning plate (3) and is fixedly connected to the side plate (9); When the sample box (2) enters the pressing mechanism (6), the rotating motor (10) drives the sample rack (4) to flip.

2. The perforated powder reverse filling device for an X-ray diffractometer according to claim 1, characterized in that: The sample box (2) comprises an arc-shaped sleeve (21), a hollow column (22), a cover (23) and two elastic members, wherein the arc-shaped sleeve (21) is slidably arranged in the mounting groove (8), the hollow column (22) is slidably arranged inside the arc-shaped sleeve (21), the cover (23) is detachably connected to the bottom of the hollow column (22), and the cover (23) is located at the bottom of the arc-shaped sleeve (21), grooves (25) are provided on both sides of the interior of the arc-shaped sleeve (21), and the two elastic members are respectively arranged in the two grooves (25).

3. The perforated powder reverse filling device for an X-ray diffractometer according to claim 2, characterized in that: The elastic member comprises a clamping plate (26) and a first spring (27); one end of the clamping plate (26) is fixedly connected to the outer wall of the hollow column (22), and the clamping plate (26) is slidably connected to the groove (25); the first spring (27) is arranged inside the groove (25), and one end of the first spring (27) is connected to the bottom surface of the groove (25), and the other end of the first spring (27) is in contact with the bottom surface of the clamping plate (26).

4. The perforated powder reverse filling device for an X-ray diffractometer according to claim 1, characterized in that: The flattening mechanism (5) comprises a cross bar (51), a mounting frame (52), a rotating rod (53), a push rod (54), a pressure plate (55) and a second spring (56); the cross bar (51) is fixed to one side of the outer wall of the circular positioning plate (3); the mounting frame (52) is fixedly mounted on the bottom of the cross bar (51); the rotating rod (53) is rotatably arranged at the bottom of the mounting frame (52); a sliding groove (57) is provided inside the rotating rod (53); and the push rod (54) is slidably arranged inside the sliding groove (57). The pressure plate (55) is located below the push rod (54) and is fixedly connected to one end of the push rod (54). The second spring (56) is arranged inside the slide groove (57), and the two ends of the second spring (56) respectively contact the push rod (54) and the inner top wall of the rotating rod (53). A driving motor is installed on one side of the outer wall of the mounting frame (52). The output shaft of the driving motor is fixedly connected to a rotating shaft. The rotating shaft passes through the mounting frame (52) and the rotating rod (53) in sequence and is fixedly connected to the rotating rod (53).

5. The perforated powder reverse filling device for an X-ray diffractometer according to claim 2, characterized in that: The pressing mechanism (6) comprises a U-shaped cover plate (61), a piston cylinder (62) and a gas pressure piece (63); the U-shaped cover plate (61) is fixedly arranged on a side of the top of the sample rack (4) close to the side plate (9); a through groove (64) is provided at the bottom of the sample rack (4) and directly below the U-shaped cover plate (61); the piston cylinder (62) is fixedly connected to the top wall of the U-shaped cover plate (61); the gas pressure piece (63) is installed on a side of the inside of the U-shaped cover plate (61) close to the side plate (9); and an air guide pipe (65) is connected between the gas pressure piece (63) and the piston cylinder (62); When the driving mechanism (7) drives the sample box (2) to enter the interior of the U-shaped cover plate (61) and abut against the gas pressure member (63), the gas in the piston cylinder (62) increases and pushes the hollow column (22) downward.

6. The perforated powder reverse filling device for an X-ray diffractometer according to claim 5, characterized in that: The gas pressure member (63) comprises an air storage cylinder (66), a piston plate (67), a third spring (68) and a pressing plate (69); the air storage cylinder (66) is fixedly connected to one side of the side plate (9) and is located in the mounting groove (8); the piston plate (67) is axially sealed and slidably connected to the inside of the air storage cylinder (66); the pressing plate (69) is fixedly connected to a side of the outer wall of the piston plate (67) away from the air storage cylinder (66); the third spring (68) is arranged inside the air storage cylinder (66), and two ends of the third spring (68) are respectively in contact with the air storage cylinder (66) and the piston plate (67); and the air guide pipe (65) is connected to the air storage cylinder (66).

7. The perforated powder reverse filling device for an X-ray diffractometer according to claim 2, characterized in that: Connecting blocks (24) are detachably connected to both sides of the outer wall of the arc-shaped sleeve (21), and both connecting blocks (24) are drivingly connected to the driving mechanism (7).

8. The perforated powder reverse filling device for an X-ray diffractometer according to claim 4, characterized in that: The bottom of the pressing plate (55) is arranged in an arc shape, and the width of the pressing plate (55) is greater than the inner diameter of the hollow column (22).

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