A sample injection device

Abstract

The application provides a sample feeding device, which comprises a platform, a sample assembly, a motor, a limiting device and a translation guiding device. The limiting device comprises a sliding plate, a rotating arm and a connecting shaft. The sliding plate is vertically arranged in front of and behind the platform and is provided with a through guide groove. The motor is fixed outside the sliding plate, and the motor shaft of the motor penetrates the sliding plate. One end of the rotating arm is connected with the motor shaft, and the other end of the rotating arm is provided with a through limiting groove. The connecting shaft is fixed to the sample assembly, and the end of the connecting shaft penetrates the limiting groove and abuts against the groove wall of the guide groove. The rotating arm rotates along with the motor shaft and drives the connecting shaft to slide along the groove wall of the guide groove, thereby driving the sample assembly to move from a sample placing position to a detection position located below the platform. The translation guiding device is provided with a horizontal guiding part, a vertical guiding part and a connecting plate connecting the horizontal guiding part and the vertical guiding part. The translation guiding device enables the sample assembly to only move horizontally or vertically. The sample feeding device can realize rapid and smooth sample feeding.

Description

Technical Field

[0001] This application relates to a sample introduction device, specifically a sample introduction device for an elemental analyzer. Background Technology

[0002] X-ray fluorescence spectrometry is widely used in the detection of elements in materials. It utilizes X-rays to irradiate the substance to be tested. After the electrons outside the nuclei of the atoms of the constituent elements of the substance are excited and transition, they emit X-rays with the characteristics of that element. By detecting the energy and intensity of these characteristic rays, the composition and content of the substance can be analyzed. This type of equipment has the advantages of short detection time, non-destructive testing, and simple pretreatment.

[0003] A sample introduction device for X-ray fluorescence spectrometers automatically moves the sample to the detection position. Chinese Invention Patent Publication CN111257584A discloses a related sample introduction device, including a base and a bracket connected to the top surface of the base. The base has a sample inlet, and a moving component is mounted on the bracket, with a sample injector connected to the moving component. A second motor is fixedly connected to one side wall of the bracket, and the second motor drives the sample injector to move horizontally via a transverse threaded rod and a transverse sliding rod. A third motor is fixedly connected to the top surface of the bracket, and the third motor drives the sample injector to move vertically via a longitudinal threaded rod and a longitudinal sliding rod. During sample introduction, the second motor can be activated to move the sample horizontally below the detection port, and then the third motor can be activated to move the sample vertically to the detection port.

[0004] When a large number of samples need to be tested, shortening the sample delivery time becomes crucial. Using a vertical and horizontal motor sample delivery mode involves the two motors operating alternately, with acceleration and deceleration processes that consume significant time.

[0005] Therefore, there is a need to provide an improved sample introduction device. Summary of the Invention

[0006] This application provides a sample introduction device that enables rapid and stable sample introduction.

[0007] Specifically, this application is achieved through the following technical solution: a sample introduction device, including a platform, a sample assembly, a motor, a limiting device, and a translational guide device. The limiting device and the translational guide device are respectively located on the left and right opposite sides of the sample assembly. The limiting device includes a sliding plate, a rotating arm, and a connecting shaft. The sliding plate is vertically arranged front and back and has a through guide groove. The motor is fixed to the outside of the sliding plate, and the motor shaft passes through the sliding plate. One end of the rotating arm is connected to the motor shaft, and the other end of the rotating arm has a through limiting groove. The connecting shaft is fixed to the sample assembly, and the end of the connecting shaft passes through the platform. The limiting groove presses against the wall of the guide groove. The rotating arm follows the rotation of the motor shaft and drives the connecting shaft to slide along the wall of the guide groove, thereby moving the sample assembly from a placement position to a detection position located below the platform. The translational guiding device is provided with a horizontal guiding part, a vertical guiding part, and a connecting plate connecting the horizontal guiding part and the vertical guiding part. The horizontal guiding part is provided with a horizontal slide rail and a horizontal slider that slides along the horizontal slide rail. The vertical guiding part is provided with a vertical slide rail and a vertical slider that slides along the vertical slide rail. The horizontal slider or the vertical slider is fixed to the sample assembly.

[0008] Furthermore, the front end of the skateboard is provided with an upwardly extending first flange, which is mounted to one side of the platform.

[0009] Furthermore, the middle part of the slide plate is provided with an upwardly extending second flange, the motor is mounted on the second flange, and the motor shaft passes through the second flange.

[0010] Furthermore, a bearing is fitted at the end of the connecting shaft, and the bearing presses against the groove wall of the guide groove.

[0011] Furthermore, the guide groove includes a first vertical section at the front end, a second vertical section at the rear end, a horizontal section in the middle, and two transition portions, wherein the transition portions respectively connect the front end of the horizontal section to the bottom of the first vertical section, and the rear end of the horizontal section to the bottom of the second vertical section.

[0012] Furthermore, the transition section includes an arc transition section connected to the horizontal section and a vertical transition section connected to the first vertical section or the second vertical section.

[0013] Furthermore, the diameter of the bearing is the same as the width of the first vertical segment and the second vertical segment.

[0014] Furthermore, the front end of the horizontal slide rail is fixed to one side of the platform, and the connecting plate fixes the vertical slide rail to the horizontal slider.

[0015] Furthermore, the sample assembly includes a sample holder and a sample cup, and the platform has a perforation. When the sample assembly is located at the detection position, the sample cup is located within the perforation.

[0016] The sample injection device of this application completes the injection process by moving the sample assembly along a specific trajectory under the drive of a single motor. At the same time, a translational guide device is set to prevent the sample assembly from rotating, which can achieve fast and stable injection.

[0017] 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

[0018] Figure 1 This is a perspective view of a sample introduction device according to one embodiment of this application;

[0019] Figure 2 for Figure 1 Another perspective view of the sample introduction device in the image;

[0020] Figure 3 for Figure 1 A plan view of the limiting slide plate of the sample injection device;

[0021] Figure 4 for Figure 1 A three-dimensional view of the rotating arm of the sample introduction device;

[0022] Figure 5 for Figure 1 A partial three-dimensional assembly diagram of the translational guide device of the sample introduction apparatus.

[0023] Explanation of reference numerals in the attached figures:

[0024] Platform 1, perforation 11, sample assembly 2, sample holder 21, sample cup 22, motor 3, motor shaft 31, limiting device 4, sliding plate 41, first flange 411, screw hole 412, second flange 413, mounting hole 414, guide groove 415, first vertical section 416, second vertical section 417, horizontal section 418, horizontal section 418, transition part 419, arc transition part 4191, vertical transition section 4192, rotating arm 42, mating hole 421, limiting groove 422, connecting shaft 43, bearing 431, translational guide device 5, horizontal guide part 51, horizontal slide rail 511, horizontal slider 512, vertical guide part 52, vertical slide rail 521, vertical slider 522, connecting plate 53. Detailed Implementation

[0025] 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.

[0026] refer to Figure 1 and Figure 2 As shown, a sample introduction device according to one embodiment of this application includes a platform 1, a sample assembly 2, a motor 3, a limiting device 4, and a translational guide device 5. The sample assembly 2 includes a sample holder 21 and a sample cup 22. The platform 1 is provided with a perforation 11. During testing, the sample cup 22 is located within the center of the perforation 11. Figure 2 As shown. Motor 3 is a geared motor used to drive the sample assembly 2 to move between the placement position and the detection position. The limiting device 4 and the translation guide device 5 are fixed on the left and right sides of the platform 1, respectively, and are connected to the sample assembly 2. The limiting device 4 and the translation guide device 5 together convert the rotational motion of the motor 3 into the translational motion of the sample assembly 2 along a specific trajectory, which will be explained in detail below.

[0027] The limiting device 4 includes a sliding plate 41, a rotating arm 42, and a connecting shaft 43, which are combined with Figure 3 As shown, the slide plate 41 is a sheet-like structure placed vertically front to back. Its front end has an upwardly extending first flange 411, which has several screw holes 412. Several screws (unlabeled) pass through the screw holes 412 to mount the first flange 411 to the left side of the platform 1. The middle of the slide plate 41 has an upwardly extending second flange 413, which also has screw holes 412 and mounting holes 414. Several screws (unlabeled) pass through the screw holes 412 to mount the motor 3 on the outside of the second flange 413. The motor 3 has a motor shaft 31. The motor 3 passes through the mounting holes 414 to the right through the second flange 413.

[0028] The slide plate 41 is provided with a through U-shaped guide groove 415. The guide groove 415 includes a first vertical section 416 at the front end of the slide plate 41, a second vertical section 417 at the rear end of the slide plate 41, a horizontal section 418 in the middle, and two transition portions 419. The two transition portions 419 respectively connect the front end of the horizontal section 418 to the bottom of the first vertical section 416, and the rear end of the horizontal section 418 to the bottom of the second vertical section 417. The transition portion 419 includes an arc transition portion 4191 connected to the horizontal section 418, and a vertical transition section 4192 connected to either the first vertical section 416 or the second vertical section 417. It can be understood that the vertical transition section 4192 is selectively provided. The tops of the first vertical section 416 and the second vertical section 417 can be set at the same height. The ratio of the total length of the first vertical section 416, the second vertical section 417, and the vertical transition section 4192 to the unfolded length of the guide groove 415 does not exceed 1 / 3.

[0029] refer to Figure 4 As shown, the rotating arm 42 is roughly longitudinally elongated. One end of the rotating arm 42 is provided with a mating hole 421, and the other end is provided with a longitudinally extending through-type limiting groove 422. The length of the limiting groove 422 is approximately 1 / 2 of the length of the rotating arm 42. During the entire sample injection process, the limiting groove 422 does not interfere with the connecting shaft 43. Figure 1 As shown, the motor shaft 31 is inserted into the mating hole 421 to connect the rotating arm 42 to the motor shaft 31, which can drive the rotating arm 42 to rotate. A connecting shaft 43, which is cylindrical, is fixed to the left side of the sample holder 21. The connecting shaft 43 passes through the limiting groove 422 of the rotating arm 42 and is inserted into the guide groove 415. A bearing 431 is fitted at the end of the connecting shaft 43, and the bearing 431 presses against the bottom side and outer wall of the guide groove 415. The width of the limiting groove 422 of the rotating arm 42 is adapted to the diameter of the bearing 431, allowing the bearing 431 to pass through.

[0030] When the bearing 431 is located in the horizontal section 418 and the arc transition section 4191 of the guide groove 415, under the gravity of the sample assembly 2, the bearing 431 at the end of the rotating arm 42 presses against the groove wall of the guide groove 415, allowing the sample assembly 2 to slide smoothly. When in the first vertical section 416, the second vertical section 417 and the vertical transition section 4192, the gravity of the sample assembly 2 is transmitted to the rotating arm 42 through the limiting groove 422, and then to the sliding plate 41 through the connecting shaft 43 and the motor shaft 31.

[0031] During sample injection, the rotating arm 42 rotates with the motor 3, driving the connecting shaft 43 to slide along the outer wall of the guide groove 415 within the guide groove 415. Simultaneously, the connecting shaft 43 slides within the limiting groove 422, thereby moving the sample assembly 2 from the top of the second vertical section 417 down, forward, and then upward along the guide groove 415 to the top of the first vertical section 416. Approaching the injection position, the sample assembly 2 moves vertically along the first vertical section 416, allowing the sample cup 22 to smoothly enter the perforation 11 of the platform 1 without interference. The specific shape of the guide groove 415 can be adjusted, and the corresponding movement trajectory of the sample assembly 2 can also be set as needed, only requiring the accuracy of the final injection position to be ensured.

[0032] When the connecting shaft 43 is at the top of the second vertical section 417, the sample assembly 2 is in the placement position. When the connecting shaft 43 is at the top of the first vertical section 416, the sample assembly 2 is in the detection position. At this time, the rotating arm 42 is basically horizontally positioned. The width of the horizontal section 418 can be significantly larger than the diameter of the bearing 431, which can save material costs. Since the bearing 431 is supported by the bottom groove wall of the horizontal section 418, it will not wobble. The widths of the first vertical section 416 and the second vertical section 417 are basically the same as the diameter of the bearing 431, which can also prevent the connecting shaft 43 from wobble.

[0033] The sample assembly 2 is also connected to a translation guide device 5 on the right side to limit the sample assembly 2 to only horizontal and vertical movement, to prevent rotation, and to prevent the sample (not shown), especially liquid sample, in the sample cup 22 from tilting.

[0034] refer to Figure 1 and combined Figure 5As shown, the translational guide device 5 includes a horizontal guide part 51, a vertical guide part 52, and a connecting plate 53 connecting the horizontal guide part 51 and the vertical guide part 52. The horizontal guide part 51 includes a horizontal slide rail 511 and a horizontal slider 512. The vertical guide part 52 includes a vertical slide rail 521 and a vertical slider 522. The horizontal slide rail 511 is a rod-shaped rod extending back and forth. The front end of the horizontal slide rail 511 is fixed to one side of the platform 1. The horizontal slider 512 is provided with a horizontal slot (not labeled). The horizontal slide rail 511 is inserted into the horizontal slot to install the horizontal slider 512 onto the horizontal slide rail 511, and the horizontal slider 512 can slide horizontally along the horizontal slide rail 511. The vertical slide rail 521 is a rod-shaped structure extending vertically. The vertical slider 522 has a vertical slot (not labeled). The vertical slide rail 521 is inserted into the vertical slot to install the vertical slider 522 onto the vertical slide rail 521, and the vertical slider 522 can slide vertically along the vertical slide rail 521. The horizontal slider 512 is embedded in one side of the connecting plate 53, and the vertical slide rail 521 is fixed to the opposite side of the connecting plate 53. The connecting plate 53 thus fixes the vertical slide rail 521 to the horizontal slider 512. The vertical slider 522 is fixed to the left side of the sample holder 21. The connecting plate 53 and the vertical slide rail 521 can be integrally formed. In this embodiment, the horizontal guide 51 is connected to the platform 1, and the vertical slider 522 of the vertical guide 52 is disposed on the sample holder 21; as a simpler alternative, the vertical guide 52 can also be connected to the platform 1, and the horizontal slider 512 of the horizontal guide 51 can be disposed on the sample holder 21.

[0035] With the help of the translation guide device 5, the sample assembly 2 can only move horizontally and vertically. When the sample assembly 2 moves vertically, the vertical slider 522 slides vertically along the vertical slide rail 521. When the sample assembly 2 moves horizontally, the horizontal slider 512 slides horizontally along the horizontal slide rail 511, and the connecting plate 53, the vertical slide rail 521 and the vertical slider 522 slide horizontally together.

[0036] The sample injection device of this application is equipped with only one motor 3, which can make the sample component 2 move along the guide groove 415 of the slide plate 41. At the same time, a translation guide device 5 is provided to prevent the sample component 2 from rotating, thereby achieving fast and stable sample injection.

[0037] 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, characterized in that: The system includes a platform, a sample assembly, a motor, a limiting device, and a translational guide device. The limiting device and the translational guide device are located on opposite sides of the sample assembly. The limiting device includes a sliding plate, a rotating arm, and a connecting shaft. The sliding plate is vertically arranged front and back and has a through guide groove. The motor is fixed to the outside of the sliding plate, and the motor shaft passes through the sliding plate. One end of the rotating arm is connected to the motor shaft, and the other end of the rotating arm has a through limiting groove. The connecting shaft is fixed to the sample assembly, and the end of the connecting shaft passes through the limiting groove and presses against the groove wall of the guide groove. The rotating arm follows the rotation of the motor shaft and drives the connecting shaft to slide along the wall of the guide groove, thereby moving the sample assembly from a placement position to a detection position located below the platform; the translational guide device is provided with a horizontal guide part, a vertical guide part and a connecting plate connecting the horizontal guide part and the vertical guide part, the horizontal guide part is provided with a horizontal slide rail and a horizontal slider that slides along the horizontal slide rail, the vertical guide part is provided with a vertical slide rail and a vertical slider that slides along the vertical slide rail, and the horizontal slider or the vertical slider is fixed to the sample assembly.

2. The sample introduction device according to claim 1, characterized in that: The front end of the skateboard is provided with an upwardly extending first flange, which is mounted to one side of the platform.

3. The sample introduction device according to claim 2, characterized in that: The slide plate has a second flange extending upward in the middle, the motor is mounted on the second flange, and the motor shaft passes through the second flange.

4. The sample introduction device according to claim 1, characterized in that: The end of the connecting shaft is fitted with a bearing, which presses against the wall of the guide groove.

5. The sample introduction device according to claim 4, characterized in that: The guide channel includes a first vertical section at the front end, a second vertical section at the rear end, a horizontal section in the middle, and two transition sections, wherein the transition sections connect the front end of the horizontal section to the bottom of the first vertical section, and the rear end of the horizontal section to the bottom of the second vertical section.

6. The sample introduction device according to claim 5, characterized in that: The transition section includes an arc transition section connected to the horizontal section and a vertical transition section connected to the first vertical section or the second vertical section.

7. The sample introduction device according to claim 5, characterized in that: The diameter of the bearing is the same as the width of the first vertical segment and the second vertical segment.

8. The sample introduction device according to claim 1, characterized in that: The front end of the horizontal slide rail is fixed to one side of the platform, and the connecting plate fixes the vertical slide rail to the horizontal slider.

9. The sample introduction device according to claim 1, characterized in that: The sample assembly includes a sample holder and a sample cup. The platform has a perforation. When the sample assembly is located at the detection position, the sample cup is located inside the perforation.

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