X-ray analyzer and its sample introduction device

Abstract

The application relates to an X-ray analyzer and a sample feeding device thereof, wherein the sample feeding device comprises a spinning assembly, a lifting assembly, a sample assembly and a sealing cover assembly; the sample assembly is placed in the spinning assembly; the lifting assembly drives the spinning assembly to move up and down; and the sealing cover assembly covers the top side of the spinning assembly. The spinning assembly comprises a moving seat, a tray and a plurality of elastic pieces; the moving seat forms a containing cavity; the tray is located in the containing cavity; the sample assembly is placed on the tray; and the elastic pieces are located in the containing cavity and push the tray upward so that the sample assembly pushes the sealing cover assembly upward. The X-ray analyzer and the sample feeding device thereof can accurately position the sample assembly by using the elastic pieces, are not affected by the movement of other structures and the spinning assembly, can simplify the structure of the sample feeding device and reduce the manufacturing difficulty of the sample feeding device.

Description

Technical Field

[0001] This application relates to an X-ray analyzer and its sample introduction device. Background Technology

[0002] X-ray analyzers are classified into down-illuminated and up-illuminated instruments based on the sample placement. In down-illuminated instruments, the X-ray tube is below the sample, with the analytical surface facing downwards, and the sample is introduced from above. Up-illuminated instruments do not require complex sample introduction devices; the distance from the sample to the X-ray tube is fixed, and the structure is more space-efficient. However, the biggest problem with this method is that broken samples can contaminate the X-ray tube and detector, causing significant damage. In up-illuminated instruments, the X-ray tube is above the sample, with the analytical surface facing upwards, and the sample is introduced from below. The advantage of below-illuminated instruments is that when analyzing powder tablets, loose powders, and liquid samples, sample breakage will not damage the X-ray tube and detector. However, existing down-illuminated instruments have complex mechanical structures for the sample introduction device, and the distance from the sample to the X-ray tube needs to be accurately positioned each time. Positioning errors can significantly affect the analysis results. Furthermore, if uniform sample rotation is required to eliminate testing errors caused by uneven element distribution on the sample surface, an even more complex structure is needed.

[0003] Therefore, improvements are needed to the existing X-ray analyzers and sample introduction devices. Summary of the Invention

[0004] This application provides an X-ray analyzer and a sample introduction device, which achieves sample positioning in the bottom injection mode through a simple structure, reducing the manufacturing difficulty of the sample introduction device.

[0005] Specifically, this application is achieved through the following technical solution: a sample introduction device, comprising a spin assembly, a lifting assembly, a sample assembly, and a sealing cap assembly, wherein the sample assembly is placed inside the spin assembly, the lifting assembly drives the spin assembly to move up and down, and the sealing cap assembly covers the top side of the spin assembly. The spin assembly includes a movable seat, a tray, and several elastic elements. The movable seat forms a receiving cavity, the tray is located inside the receiving cavity, the sample assembly is placed on the tray, and the elastic elements are located inside the receiving cavity and push the tray upward so that the sample assembly contacts the sealing cap assembly upward.

[0006] According to one embodiment of this application, it further includes a fixing frame, the sealing cover assembly is fixed to one side of the fixing frame, the movable seat is slidably disposed on the same side of the fixing frame, and the lifting assembly is fixed to the opposite side of the fixing frame.

[0007] According to one embodiment of this application, the spin assembly includes a first motor, a lower disk, and an upper disk. The first motor is fixed to the bottom side of the movable seat, the lower disk is connected to the motor shaft of the first motor and located outside the receiving cavity, and the upper disk is fixed to the bottom of the tray and attracts the lower disk.

[0008] According to one embodiment of this application, the elastic element is positioned between the upper disk and the tray.

[0009] According to one embodiment of this application, the spin assembly further includes a first bearing, the bottom of the upper disk is provided with a groove for accommodating the first bearing, and the bottom wall of the receiving cavity is provided with a first protrusion extending into the first bearing.

[0010] According to one embodiment of this application, the sealing cover assembly includes a top cover, a second bearing, and a bearing pressure ring. The sample assembly abuts against the bottom surface of the bearing pressure ring. The second bearing is located in the central hole of the bearing pressure ring. The top cover has a second protrusion extending downward into the second bearing.

[0011] According to one embodiment of this application, the sealing cover assembly is provided with an annular fixing seat and a sealing ring. The fixing seat is connected to the fixing frame, the top cover covers the top side of the fixing seat, and the sealing ring is fixed inside the fixing seat and seals the fixing seat and the movable seat.

[0012] According to one embodiment of this application, the lifting assembly includes a second motor, a nut assembly, and a connecting piece. The second motor is connected to the fixed frame, and the motor shaft of the second motor is a lead screw. The nut assembly is sleeved on the lead screw. One end of the connecting piece is connected to the movable seat, and the other end is connected to the nut assembly.

[0013] According to one embodiment of this application, the fixing frame is provided with a guide portion, and the spin assembly includes a slider fixed to one side of the movable seat, the slider being engaged with the guide portion.

[0014] This application can also be implemented through the following technical solution: an X-ray analyzer, including the aforementioned sample introduction device.

[0015] The X-ray analyzer and its sample introduction device of this application can accurately position the sample components using elastic elements, without being affected by the movement of other structures and spin components, which can simplify the structure of the sample introduction device and reduce the manufacturing difficulty of the sample introduction device.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] Figure 1 This is a perspective view of the sample introduction device of an X-ray analyzer according to one embodiment of this application.

[0018] Figure 2 for Figure 1 Cross-sectional view of the sample injection device.

[0019] Figure 3 for Figure 2 A partial enlarged view of the sealing cap assembly and spin assembly of the sample injection device.

[0020] Figure 4 This is an exploded three-dimensional view of the spin assembly and lifting assembly of the sample introduction device.

[0021] Figure 5 This is an exploded perspective view of the sealing cap assembly of the sample injection device.

[0022] Explanation of reference numerals in the attached figures:

[0023] Spin assembly 1, movable seat 11, receiving cavity 111, first protrusion 112, tray 12, second positioning hole 121, elastic element 13, first motor 14, motor shaft 141, lower disk 15, first magnet 151, upper disk 16, first positioning hole 161, groove 162, first motor fixing plate 17, first bearing 18, slider 19, dovetail groove 191, lifting assembly 2, second motor 21, lead screw 211, nut assembly 22, limiting shaft 221, connecting plate 23, through hole 231, limiting groove 232, second motor fixing plate 24, sample assembly 3, sealing cover assembly 4, top cover 41, second protrusion 411, through hole 412, bearing pressure ring 42, center hole 421, second bearing 43, fixing seat 44, sealing ring 45, fixing frame 5, guide part 51. Detailed Implementation

[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses, systems, devices, and methods consistent with some aspects of this application.

[0025] This application relates to an X-ray analyzer and its sample introduction device. The sample introduction device adopts a bottom-introduction method, that is, the X-ray tube and detector are located on the top side of the sample introduction device, and the sample is introduced from the bottom side. In this way, even if the sample leaks, it will not contaminate the X-ray tube and detector, and will not cause significant losses.

[0026] refer to Figure 1 and Figure 2As shown, the sample introduction device includes a spin assembly 1, a lifting assembly 2, a sample assembly 3, and a sealing cap assembly 4. The lifting assembly 2 can drive the spin assembly 1 to move up and down. The sample assembly 3 is placed inside the spin assembly 1, and the sealing cap assembly 4 covers the top side of the spin assembly 1 to seal the sample assembly 3 inside the spin assembly 1. The position of the sealing cap assembly 4 is fixed. The spin assembly 1 moves up and down to release and introduce the sample, and can also homogenize the liquid sample through spinning. The sample introduction process of the device is roughly as follows: first, the sample is placed into the sample assembly 3, then the sample assembly 3 is placed into the spin assembly 1. Then, the lifting assembly 2 drives the spin assembly 1 to the detection position. At the detection position, the spin assembly 1 and the sealing cap assembly 4 are sealed together, sealing the sample assembly 3 inside the spin assembly 1 and the sealing cap assembly 4. During detection, the spin assembly 1 spins to make the sample more homogenized, ensuring accurate detection.

[0027] Combination Figure 3 and Figure 4 As shown, to facilitate observation of the structure of the spin assembly 1 and the sealing cap assembly 4, Figure 3 The sample assembly 3 is shown only with a dashed box. The spin assembly 1 has a movable seat 11 and a tray 12. The movable seat 11 forms a receiving cavity 111, and the tray 12 is located inside the receiving cavity 111. The sample assembly 3 is placed on the tray 12. To ensure the accuracy of the test results, the sample assembly 3 needs to be in close contact with the sealing cap assembly 4 for accurate positioning. To ensure close contact between the sample assembly 3 and the sealing cap assembly 4, the spin assembly 1 also has several elastic elements 13. The elastic elements 13 are located at the bottom inside the receiving cavity 111 and push upward against the tray 12, so that the sample assembly 3 on the tray 12 can touch the sealing cap assembly 4 upward. In this way, with the help of these elastic elements 13, the sample assembly 3 is in close contact with the sealing cap assembly 4. Even if the stroke of the lifting assembly 2 driving the spin assembly 1 is not particularly precise, or if there are some deviations in other structures during manufacturing and assembly, it will not affect the accurate positioning of the sample assembly 3 in the test position. This simplifies the structure of the sample introduction device and reduces the manufacturing difficulty of the sample introduction device.

[0028] The sample injection device includes a fixed frame 5, a sealing cap assembly 4 fixed to one side of the fixed frame 5, a spin assembly 1 slidably mounted on that side of the fixed frame 5 via its movable seat 11, and a lifting assembly 2 fixed to the opposite side of the fixed frame 5. The fixed frame 5 integrates the spin assembly 1, the sealing cap assembly 4, and the lifting assembly 2 into a single sample injection device. The specific details of how the lifting assembly 2 drives the spin assembly 1 to move up and down will be described in detail later. The structure of the spin assembly 1 will be further described below.

[0029] The spin assembly 1 also includes a first motor 14, a lower disk 15, and an upper disk 16. The first motor 14 is fixed to the bottom side of the moving base 11 via a first motor fixing piece 17. The lower disk 15 is located outside the receiving cavity 111 and is connected to the motor shaft 141 extending upward from the first motor 14. The upper disk 16 is located inside the receiving cavity 111 and is fixed to the bottom of the tray 12. The upper disk 16 and the lower disk 15 attract each other. When the first motor 14 is working, it drives the lower disk 15 to rotate. Under the influence of magnetic force, the upper disk 16 follows the lower disk 15 to rotate, thus driving the tray 12 and the sample assembly 3 to rotate, making the liquid sample in the sample assembly 3 more uniform. The upper disk 16 and the lower disk 15 are driven by magnetic force. The receiving cavity 111 of the spin assembly 1 has no other through-hole structure except for an opening at the top. With this configuration, after the spin assembly 1 reaches the test position and the sealing cap assembly 4 is closed on the top side of the spin assembly 1, the sample assembly 3 is in a sealed environment. The structure of the moving base 11 can be relatively simple, without the need for through holes and seals.

[0030] The top surface of the lower disk 15 has a ring of first magnetic blocks 151 arranged circumferentially, and correspondingly, the bottom surface of the upper disk 16 has a ring of second magnetic blocks (unlabeled) arranged circumferentially. The disk is formed by installing magnetic blocks, resulting in a simple structure and ease of manufacturing. The aforementioned elastic element 13 is a spring. The top surface of the upper disk 16 also has several first positioning holes 161, and the bottom surface of the tray 12 has several second positioning holes 121. The elastic element 13 is positioned within the first positioning holes 161 and the second positioning holes 121 and is in a compressed state to drive the sample assembly 3 on the tray 12 to contact the sealing cap assembly 4.

[0031] When the tray 12 and sample assembly 3 within the spin assembly 1 rotate, the movable seat 11 remains stationary. The spin assembly 1 also includes a first bearing 18. The bottom of the upper disk 16 has a groove 162, and the first bearing 18 is located within the groove 162. The movable seat 11 has a first protrusion 112 at the center of the bottom wall of the receiving cavity 111. The first protrusion 112 extends into the first bearing 18, meaning the first bearing 18 is positioned between the inner wall of the groove 162 and the first protrusion 112. The first bearing 18 is supported on the first protrusion 112, and the tray 12 is supported on the first bearing 18. The tray 12 and the movable seat 11 do not directly contact each other, and the rotation of the tray 12 and sample assembly 3 does not affect the movable seat 11.

[0032] Combination Figure 3 and Figure 5As shown, the sealing cap assembly 4 includes a top cover 41, a bearing ring 42, and a second bearing 43. The sample assembly 3 abuts against the bottom surface of the bearing ring 42. The second bearing 43 is located within the central hole 421 of the bearing ring 42. A downwardly protruding second protrusion 411 is located at the center of the top cover 41, extending into the second bearing 43. The second bearing 43 is positioned between the second protrusion 411 and the bearing ring 42. The bearing ring 42 rotates with the sample assembly 3. The second bearing 43 separates the top cover 41 from the bearing ring 42, ensuring that the rotation of the bearing ring 42 does not affect the top cover 41. The top cover 41 has a through hole 412 penetrating the second protrusion 411, used for installing and positioning an X-ray tube (not shown) and for detection (not shown).

[0033] The sealing cap assembly 4 is also provided with an annular fixing seat 44 and a sealing ring 45. The fixing seat 44 is fixed on one side of the fixing frame 5, and the top cover 41 covers the top side of the fixing seat 44. The sealing ring 45 is fixed inside the fixing seat 44 and seals the fixing seat 44 and the movable seat 11, so that the fixing seat 44 and the movable seat 11 together form the sealing cavity of the sealing sample assembly 3.

[0034] Back Figure 4 and combined Figure 1 As shown, the lifting assembly 2 includes a second motor 21, a nut assembly 22, and a connecting piece 23. The second motor 21 is connected to the fixed frame 5 via a second motor fixing piece 24. The motor shaft of the second motor 21 is a lead screw 211, and the nut assembly 22 is sleeved on the lead screw 211. One end of the connecting piece 23 is connected to the movable seat 11, and the other end is connected to the nut assembly 22. The connecting piece 23 has a through hole 231 for the fixed frame 5 to pass through. The nut assembly 22 has a pair of limiting shafts 221 on both sides. One end of the connecting piece 23 has a limiting groove 232 that extends to one side. The limiting shafts 221 are horizontally inserted into the limiting groove 232, fixing the nut assembly 22 to the other end of the connecting piece 23. When the second motor 21 is working, it drives the nut assembly 22 to move up and down on the lead screw 211, thereby driving the connecting piece 23 and the movable seat 11 to move up and down, thus realizing the up and down movement of the self-rotating assembly 1.

[0035] The mounting bracket 5 has a guide part 51 on the side facing the spin assembly 1. The guide part 51 can be manufactured separately and then fixed to one side of the mounting bracket 5. The spin assembly 1 includes a slider 19 fixed to one side of the movable base 11. The slider 19 has a dovetail groove 191 that engages with the guide part 51. The slider 19 is assembled with the guide part 51 in the vertical direction through the dovetail groove 191. When the spin assembly 1 moves up and down, the slider 19 moves up and down along the guide part 51, which can make the spin assembly 1 slide smoothly.

[0036] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A sample introduction device, comprising a spin assembly, a lifting assembly, a sample assembly, a sealing cap assembly, and a fixing frame, wherein the sealing cap assembly is fixed to one side of the fixing frame, a movable seat is slidably disposed on the same side of the fixing frame, the lifting assembly is fixed to the opposite side of the fixing frame, the sample assembly is placed inside the spin assembly, the lifting assembly drives the spin assembly to move up and down, and when the spin assembly is in a detection position, the sealing cap assembly covers the top side of the spin assembly and seals the sample assembly between the sealing cap assembly and the spin assembly, characterized in that: The spin assembly includes a movable base and a tray. The movable base forms a receiving cavity, and the tray is located within the receiving cavity. The sample assembly is placed on the tray. The spin assembly also includes a first motor, a lower disk, an upper disk, and a first bearing. The first motor is fixed to the outer bottom side of the movable base. The lower disk is located outside the receiving cavity and connected to the motor shaft of the first motor. The upper disk is located inside the receiving cavity and attracts the lower disk. The upper disk is fixed to the bottom of the tray. The first bearing is located between the upper disk and the bottom wall of the receiving cavity. The sealing cover assembly includes a top cover, a bearing pressure ring, and a second bearing. The second bearing is located between the bearing pressure ring and the top cover. The spin assembly also includes several elastic elements. The elastic elements are located within the receiving cavity and positioned between the upper disk and the tray. The elastic elements push the tray upwards, causing the sample assembly to contact the bottom surface of the bearing pressure ring upwards. When the first motor drives the lower disk to rotate, the upper disk rotates along with the lower disk, causing the tray, the sample assembly, the elastic elements, and the bearing pressure ring to rotate together.

2. The sample introduction device according to claim 1, characterized in that: The bottom of the upper disk is provided with a groove to accommodate the first bearing, and the bottom wall of the receiving cavity is provided with a first protrusion that extends into the first bearing.

3. The sample introduction device according to claim 1, characterized in that: The second bearing is located in the central hole of the bearing pressure ring, and the top cover has a second protrusion that extends downward into the second bearing.

4. The sample introduction device according to claim 1, characterized in that: The sealing cover assembly is provided with an annular fixed seat and a sealing ring. The fixed seat is connected to the fixed frame. The top cover covers the top side of the fixed seat. The sealing ring is fixed inside the fixed seat and seals the connection between the fixed seat and the movable seat.

5. The sample introduction device according to claim 1, characterized in that: The lifting assembly includes a second motor, a nut assembly, and a connecting piece. The second motor is connected to the fixed frame, and the motor shaft of the second motor is a lead screw. The nut assembly is sleeved on the lead screw. One end of the connecting piece is connected to the movable seat, and the other end is connected to the nut assembly.

6. The sample introduction device according to claim 1, characterized in that: The fixed frame is provided with a guide part, and the spin assembly includes a slider fixed to one side of the movable seat, the slider being engaged with the guide part.

7. An X-ray analyzer, characterized in that: Includes the sample introduction device as described in any one of claims 1 to 6.

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