Automatic sampling mechanism for atomic absorption spectrophotometer

Abstract

The utility model discloses an automatic sample introduction mechanism for an atomic absorption spectrophotometer, which comprises a base, a cavity structure is arranged in the middle of the inside of the base, and a plurality of limiting columns are mounted at the top end of the base; the plurality of placing grooves are formed in the top end of the base in a circular array manner; the driving mechanism is arranged inside the cavity structure, and the atomic absorption spectrophotometer relates to the technical field of atomic absorption spectrophotometers. According to the device, high automation of sample treatment is realized, sample bottles with different sizes and shapes are allowed to be matched, the universality and the flexibility of the mechanism are improved, an efficient, accurate and reliable solution is provided for sample treatment of the atomic absorption spectrophotometer, and the device is suitable for popularization and application. And the method plays an important role in promoting the accuracy and efficiency of scientific research and experimental analysis.

Description

Technical Field

[0001] The utility model relates to the technical field of atomic absorption spectrophotometers, in particular to an automatic sample injection mechanism for atomic absorption spectrophotometers. Background Art

[0002] In the prior art, atomic absorption spectrophotometers (AAS) are widely used in the field of analytical chemistry to measure the concentration of specific elements in samples. The core of this technology is a high-precision spectroscopic analysis instrument, which relies on accurately measuring the ability of a sample to absorb light of a specific wavelength to determine the content of the element. In traditional AAS applications, the introduction of samples usually requires manual operation, including using a pipette or other tools to transfer the sample to the sample chamber of the spectrophotometer. This process involves multiple steps, such as sample preparation, quantitative transfer, and stable placement, and is often carried out in a laboratory environment.

[0003] However, the manual sample handling used in the prior art is not only inefficient, but also prone to human error, affecting the accuracy and repeatability of the experimental results. For applications that require processing a large number of samples or long-term continuous monitoring, manual operation is particularly an efficiency bottleneck. Manual sample handling is also difficult to ensure consistency between samples, affecting the accuracy of the measurement. Utility Model Content

[0004] The utility model aims to provide an automatic sample injection mechanism for an atomic absorption spectrophotometer to solve the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic sampling mechanism for an atomic absorption spectrophotometer, comprising: a base, a cavity structure is opened in the middle part of the interior of the base, and a plurality of limit columns are installed on the top of the base; a placement groove, a plurality of the placement grooves are arranged in a circular array at the top of the base; a driving mechanism, the driving mechanism is arranged inside the cavity structure; a clamping mechanism, the clamping mechanism is installed on the driving end of the driving mechanism; a rotating motor, the bottom end of the rotating motor is fixedly installed on one side of the top of the base; a mounting column, the mounting column is fixedly arranged on the driving end of the rotating motor in a vertical state; an extraction mechanism, the extraction mechanism is arranged on the top of the mounting column.

[0006] In a feasible embodiment, the driving mechanism includes: a driving motor, which is embedded in the interior of the cavity structure; a mounting frame, which is arranged inside the cavity structure; a first gear, which is fixedly arranged on the driving end of the driving motor; a second gear, which is respectively arranged at the upper and lower ends of the mounting frame; an inner shaft, which is fixedly arranged on the second gear located at the bottom end; an outer shaft, which is fixedly arranged on the second gear located at the top end and movably mounted on the outside of the inner shaft; and a placement component, which is arranged on the inner shaft and the outer shaft.

[0007] In a feasible embodiment, the placement assembly includes: a first placement plate, the first placement plate is fixedly mounted on the outer side of the outer wall of the outer shaft, and is provided with a plurality of first placement holes and guide grooves; a second placement plate, the middle portion of the second placement plate is mounted on the outer side of the outer wall of the inner shaft, and is provided with a plurality of second placement holes and guide grooves; a spring, a plurality of the springs are respectively embedded in the first placement plate and the second placement plate, and are respectively located beside a plurality of the first placement holes and a plurality of the second placement holes; a clamping member, a plurality of the clamping members are respectively movably arranged in the horizontal direction at the ends of the springs.

[0008] In a feasible embodiment, the extraction mechanism includes: a rotating motor, which is embedded in the top of the mounting column; a top plate, which is fixedly connected to the top of the mounting column and has a limiting groove; and a linkage component, which is arranged on the top plate and connected to the driving end of the driving motor.

[0009] In a feasible embodiment, the linkage assembly includes: a third gear, which is fixedly mounted on the driving end of the rotating motor; a threaded rod, the two ends of which are respectively arranged at the bottom end of the top plate through hinges; a fourth gear; the fourth gear is fixedly mounted on one end of the threaded rod and meshes with the third gear; a moving block, which is screwed on the outside of the outer wall of the threaded rod and matches the limit groove.

[0010] In a feasible embodiment, the extraction mechanism includes: an electric push rod, which is arranged at the bottom end of the moving block; a suction pump, which is installed on the telescopic end of the electric push rod; and a needle, which is installed at the input end of the suction pump.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the sample bottle is placed in the placement groove at the top of the base, the driving motor includes a coaxial reverse rotation mechanism of the inner shaft and the outer shaft, the driving clamping assembly accurately controls the placement assembly to clamp the sample bottle, ensuring its stable and accurate positioning, the extraction mechanism realizes the precise positioning of the extraction head, the electric push rod and the suction pump are linked to accurately align the needle with the sample bottle for effective sample extraction, so the device realizes a high degree of automation of sample processing, significantly improves the efficiency and accuracy of the experiment, reduces the need for manual operation, thereby reducing experimental errors, and enhancing the reliability of experimental results, while allowing adaptation to sample bottles of different sizes and shapes, increasing the versatility and flexibility of the mechanism, and providing an efficient, accurate and reliable solution for sample processing of atomic absorption spectrophotometers. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the first gear structure of the utility model;

[0014] Figure 3 This is a schematic diagram of the shaft side structure of the utility model;

[0015] Figure 4 This is a schematic diagram of the limit column structure of the utility model;

[0016] Figure 5 It is a schematic diagram of the spring structure of the utility model.

[0017] In the figure: 1, base, 2, placement groove, 3, mounting column, 4, drive motor, 5, mounting frame, 6, first gear, 7, second gear, 8, inner shaft, 9, outer shaft, 10, first placement plate, 11, second placement plate, 12, spring, 13, clamping member, 14, rotating motor, 15, top plate, 16, third gear, 17, threaded rod, 18, fourth gear, 19, moving block, 20, electric push rod, 21, suction pump, 22, needle, 23, rotating motor. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figures 1 to 5The utility model provides a technical solution: an automatic sample introduction mechanism for an atomic absorption spectrophotometer, comprising: a base 1, a placement groove 2, a driving mechanism, a clamping mechanism, a rotating motor 23, a mounting column 3 and an extraction mechanism, wherein a cavity structure is provided in the middle portion of the interior of the base 1, and a plurality of limit columns are installed at the top of the base 1; a plurality of placement grooves 2 are arranged at the top of the base 1 in a circular array; the driving mechanism is arranged inside the cavity structure; the clamping mechanism is installed on the driving end of the driving mechanism; the bottom end of the rotating motor 23 is fixedly installed on one side of the top of the base 1; the mounting column 3 is fixedly arranged on the driving end of the rotating motor 23 in a vertical state; and the extraction mechanism is arranged at the top of the mounting column 3.

[0020] In the specific implementation process, it should be noted that the sample is placed in a plurality of placement grooves 2 located at the top of the base 1, and the placement grooves 2 are arranged in a circular array. There is a cavity structure in the middle part of the base 1, in which a driving mechanism is installed. When the operation starts, the rotating motor 23 is started, and the rotating motor 23 drives the extraction mechanism to rotate through the mounting column 3, so that the extraction mechanism extracts the sample at the clamping mechanism, and the driving mechanism is used to drive the clamping mechanism so that the clamping mechanism clamps the sample bottle. The setting of the holding mechanism can realize the clamping of sample bottles of different diameters, which improves the practicality. The limit column at the top of the base 1 is used to guide and limit the clamping mechanism, so that the clamping mechanism is more stable in the process of clamping the sample bottle. The extraction mechanism extracts a part of the liquid sample for detection by the atomic absorption spectrophotometer. The whole process is carried out automatically, ensuring the accuracy and repeatability of sample processing, thereby improving the efficiency and accuracy of the experiment.

[0021] In some examples, further, the driving mechanism includes: a driving motor 4, a mounting frame 5, a first gear 6, a second gear 7, an inner shaft 8, an outer shaft 9 and an installation assembly, the driving motor 4 is embedded in the interior of the cavity structure; the mounting frame 5 is arranged inside the cavity structure; the first gear 6 is fixedly arranged on the driving end of the driving motor 4; the two second gears 7 are respectively arranged at the upper and lower ends of the mounting frame 5; the inner shaft 8 is fixedly mounted on the second gear 7 located at the bottom end; the outer shaft 9 is fixedly mounted on the second gear 7 located at the top end, and is movably mounted on the outside of the inner shaft 8; the installation assembly is arranged on the inner shaft 8 and the outer shaft 9.

[0022] In the specific implementation process, it should be noted that the driving motor 4 is embedded in the cavity structure inside the base 1, and a first gear 6 is fixedly installed on the driving end of the driving motor 4. Two second gears 7 are respectively installed at the upper and lower ends of the mounting frame 5. The second gear 7 is meshed with the first gear 6 to form a gear transmission system. The outer shaft 9 is movably sleeved on the outside of the inner shaft 8, and the inner shaft 8 and the outer shaft 9 are designed to be able to achieve coaxial reverse rotation. When the driving motor 4 is started, the inner shaft 8 and the outer shaft 9 are driven to rotate coaxially and reversely through the meshing transmission of the first gear 6 and the second gear 7, and then the placement component on the clamping mechanism is driven to move, thereby achieving stable clamping of the sample bottle placed in the placement groove 2. The sample bottle can be accurately positioned and clamped, providing a stable foundation for the subsequent extraction and detection steps. The automation and precise control of the entire process ensure the efficiency and accuracy of sample processing, thereby improving the overall efficiency and reliability of the atomic absorption spectrophotometer experiment.

[0023] In some examples, further, the placement assembly includes: a first placement plate 10, a second placement plate 11, a spring 12 and a clamping member 13, the first placement plate 10 is fixedly mounted on the outer side of the outer wall of the outer shaft 9, and is provided with a plurality of first placement holes and guide grooves; the middle part of the second placement plate 11 is mounted on the outer side of the outer wall of the inner shaft 8, and is provided with a plurality of second placement holes and guide grooves; a plurality of springs 12 are respectively embedded in the first placement plate 10 and the second placement plate 11, and are respectively located next to the plurality of first placement holes and the plurality of second placement holes; a plurality of clamping members 13 are respectively movably arranged at the ends of the springs 12 in the horizontal direction.

[0024] In the specific implementation process, it should be noted that when the accuracy and repeatability of the atomic absorption spectrophotometer analysis are improved, the reliability of the entire experimental process is enhanced.

[0025] In some examples, further, the extraction mechanism includes: a rotating motor 14, a top plate 15 and a linkage assembly, the rotating motor 14 is embedded in the top of the mounting column 3; the top plate 15 is fixedly connected to the top of the mounting column 3, and a limiting groove is opened on the top plate 15; the linkage assembly is arranged on the top plate 15 and is connected to the driving end of the driving motor 4.

[0026] In the specific implementation process, it should be noted that when the operation starts, the rotating motor 14 starts to drive the linkage assembly to perform corresponding movements. The linkage assembly is placed on the top plate 15 and is connected to the driving end of the drive motor 4. This allows the linkage assembly to perform precise movements according to the movement of the rotating motor 14. The movement process is guided and limited by the limit grooves, ensuring that the movement path of the linkage assembly conforms to the predetermined design, thereby achieving precise operation. During the extraction process, the linkage assembly is responsible for accurately positioning the extraction head of the extraction mechanism above the sample bottle, thereby extracting the sample. Accurate positioning is achieved through the precise control of the limit grooves on the top plate 15 and the rotating motor 14. High precision and high efficiency in the extraction process are ensured, while also ensuring the stability of the sample and the safety of the extraction process.

[0027] In some examples, further, the linkage assembly includes: a third gear 16, a threaded rod 17, a fourth gear 18 and a moving block 19; the third gear 16 is fixedly mounted on the driving end of the rotating motor 14; the two ends of the threaded rod 17 are respectively arranged at the bottom end of the top plate 15 through hinges; the fourth gear 18 is fixedly mounted on one end of the threaded rod 17 and meshes with the third gear 16; the moving block 19 is screwed to the outside of the outer wall of the threaded rod 17 and matches the limit groove.

[0028] In the specific implementation process, it should be noted that the third gear 16 is fixedly mounted on the driving end of the rotating motor 14. When the rotating motor 14 is started, the third gear 16 is driven to rotate. The two ends of the threaded rod 17 are arranged at the bottom end of the top plate 15 through hinge seats to ensure the stability and correct positioning of the threaded rod 17. The fourth gear 18 is fixedly mounted at one end of the threaded rod 17 and meshes with the third gear 16. When the third gear 16 rotates, the fourth gear 18 also rotates, thereby driving the threaded rod 17 to rotate. When the threaded rod 17 rotates, the moving block 19 moves along the threaded rod 17 due to the combination of the spiral structure of the moving block 19 and the threaded rod 17. The movement path of the moving block 19 is guided by the limit groove to ensure that the moving block 19 moves in a predetermined path and direction. Accurate linear motion is essential for positioning the extraction head of the extraction mechanism, which ensures that the extraction head can be accurately aligned and reach above the sample bottle for effective sample extraction. The linkage assembly realizes precise control and stable operation of the extraction mechanism. It improves the convenience and efficiency of operation and ensures the consistency and reliability of analysis results.

[0029] In some examples, further, the extraction mechanism includes: an electric push rod 20, a suction pump 21 and a needle 22, the electric push rod 20 is arranged at the bottom end of the moving block 19; the suction pump 21 is installed on the telescopic end of the electric push rod 20; the needle 22 is installed at the input end of the suction pump 21.

[0030] In the specific implementation process, it should be noted that when the moving block 19 reaches the specified position on the threaded rod 17 through the rotation of the rotating motor 14, the electric push rod 20 starts to work. The electric push rod 20 has a telescopic function and can accurately control the position of the suction pump 21. When the electric push rod 20 is extended or retracted, the suction pump 21 moves accordingly, so that the needle 22 can be accurately aligned with the sample bottle. When the needle 22 is correctly aligned and inserted into the sample bottle, the suction pump 21 starts and starts to extract the sample. The precise control of the electric push rod 20 ensures that the needle 22 can be accurately aligned with the sample bottle and safely extract the required amount of sample. The extraction mechanism not only improves the efficiency of sample processing, but also ensures the accuracy and reliability of atomic absorption spectrophotometer analysis. The automation and precise control of the entire process greatly improve the experimental The efficiency and accuracy of the automatic sampling mechanism for the atomic absorption spectrophotometer fully consider the convenience, safety and accuracy of the operation, greatly improve the automation degree of the experimental process, and provide an efficient and accurate sample processing solution for the atomic absorption spectrophotometer. Through this highly automated extraction mechanism, the consistency and reliability of the experimental data can be significantly improved, which is of great value for scientific research and experimental analysis.

[0031] In the description of the present utility model, it should be understood that the orientations or positional relationships indicated by terms such as "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "two ends", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation; at the same time, unless otherwise clearly stipulated and limited, terms such as "setting", "installation", "connection", "fixed installation", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic sample injection mechanism for an atomic absorption spectrophotometer, characterized in that: include: A base, wherein a cavity structure is provided in the middle portion of the base, and a plurality of limit columns are installed at the top of the base; A plurality of placement grooves are arranged in a circular array on the top of the base; A driving mechanism, wherein the driving mechanism is arranged inside the cavity structure; A clamping mechanism, wherein the clamping mechanism is mounted on a driving end of the driving mechanism; A rotating motor, the bottom end of which is fixedly mounted on one side of the top end of the base; A mounting column, wherein the mounting column is fixedly disposed on the driving end of the rotating motor in a vertical state; The extraction mechanism is arranged on the top end of the mounting column.

2. The automatic sample introduction mechanism for an atomic absorption spectrophotometer according to claim 1, characterized in that: The driving mechanism comprises: A driving motor, wherein the driving motor is embedded in the cavity structure; A mounting frame, the mounting frame being arranged inside the cavity structure; A first gear, wherein the first gear is fixedly disposed on a driving end of the driving motor; A second gear, wherein two second gears are respectively arranged at the upper and lower ends of the mounting frame; An inner shaft, wherein the inner shaft is fixedly mounted on the second gear at the bottom end; An outer shaft, which is fixedly mounted on the second gear at the top and movably sleeved on the outer side of the inner shaft; A mounting assembly is arranged on the inner shaft and the outer shaft.

3. The automatic sample introduction mechanism for an atomic absorption spectrophotometer according to claim 2, characterized in that: The placement assembly comprises: A first placement plate, which is fixedly sleeved on the outer side of the outer wall of the outer shaft and is provided with a plurality of first placement holes and guide grooves; A second placement plate, wherein the middle portion of the second placement plate is sleeved on the outer side of the outer wall of the inner shaft and is provided with a plurality of second placement holes and guide grooves; Springs, wherein a plurality of the springs are respectively embedded in the first placement plate and the second placement plate, and are respectively located beside a plurality of the first placement holes and a plurality of the second placement holes; A plurality of clamping members are arranged at the ends of the spring and can move in the horizontal direction.

4. The automatic sample introduction mechanism for an atomic absorption spectrophotometer according to claim 1, characterized in that: The extraction mechanism comprises: A rotating motor, wherein the rotating motor is embedded in the top end of the mounting column; A top plate, the top plate is fixedly connected to the top end of the mounting column, and a limiting groove is provided on the top plate; A linkage assembly is arranged on the top plate and connected to the driving end of the driving motor.

5. The automatic sample introduction mechanism for an atomic absorption spectrophotometer according to claim 4, characterized in that: The linkage components include: A third gear, the third gear being fixedly mounted on a driving end of the rotating motor; A threaded rod, both ends of which are respectively arranged at the bottom end of the top plate through hinge seats; The fourth gear is fixedly mounted on one end of the threaded rod and meshes with the third gear; The moving block is screwed on the outer side of the outer wall of the threaded rod and matches with the limiting groove.

6. The automatic sample introduction mechanism for an atomic absorption spectrophotometer according to claim 5, characterized in that: The extraction mechanism comprises: An electric push rod, which is arranged at the bottom end of the moving block; A suction pump, wherein the suction pump is mounted on the telescopic end of the electric push rod; A needle is installed at the input end of the suction pump.

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