An autosampler structure

Abstract

The utility model discloses an automatic sampler structure, including mounting bracket, install test tube installation subassembly on the mounting bracket, the test tube installation subassembly is including limit seat, magnetic block, test tube stand and adsorption seat, the magnetic block is fixedly connected through limit seat on the upper surface of mounting bracket, the utility model discloses the test tube stand is pulled by handle, and the test tube stand is away from automatic sample injection needle, can install sample test tube at this moment, and after installation, promote test tube stand reset, when test tube stand reaches predetermined position, and adsorption seat and magnetic block contact and adsorb, thereby realize the stable location of test tube stand, through being equipped with test tube installation subassembly, in the process of taking out or putting into test tube stand, can pull out test tube stand and away from sample injection needle, thereby reserve more abundant space for the installation or taking out operation of test tube, like this, sample injection needle no longer limit the operation space of hand, and effectively promoted the loading efficiency of sample.

Description

Technical Field

[0001] This utility model relates to a sample injector, specifically an automatic sample injector structure, and belongs to the field of automatic sample injector technology. Background Technology

[0002] The atomic fluorescence autosampler, a core component of atomic fluorescence spectrometers, is a key device for achieving automated and precise sample analysis. Using a motorized sampling needle as its core actuator, and relying on its built-in precision drive and control systems, it can automatically extract atomic fluorescence solutions from test tubes placed in designated wells of the sample tray according to a preset analysis program.

[0003] A Chinese utility model patent (publication number: CN222028172U) discloses an atomic fluorescence autosampler. This autosampler uses a handle in its structure to drive a first screw to rotate upwards via a horizontal plate, which in turn moves a circular plate upwards. The moving circular plate then moves the base frame upwards, allowing a test tube to be inserted through a ring. The bottom of the test tube's outer wall is then inserted into the inner wall of the base frame. This can be adjusted according to different test tube sizes to ensure normal sampling by the atomic fluorescence autosampler and eliminate the limitations of its use. In the current autosampler's layout, the test tube mounting bracket is directly positioned below the motorized sampling needle in the core active area. During test tube installation, replacement, or adjustment, the space occupied by the motorized sampling needle creates a significant obstruction. The presence of the sampling needle not only limits the operating space for hands or auxiliary tools but also easily leads to operational errors. For example, touching the sampling needle may cause needle tip deviation, or the test tube may collide with the sampling needle, resulting in solution spillage, needle tip damage, and consequently affecting sample loading efficiency. Therefore, an autosampler structure is proposed. Utility Model Content

[0004] The purpose of this invention is to provide an autosampler structure to solve one of the problems mentioned in the background art.

[0005] This utility model is implemented by the following technical solution: an automatic sampler structure, including a mounting frame, on which a test tube mounting assembly is mounted; The test tube mounting assembly includes a limiting seat, a magnetic block, a test tube rack, and an adsorption seat; The magnetic block is fixedly connected to the upper surface of the mounting frame via a limiting seat. A guide rail is installed on the upper surface of the mounting frame. A sliding block adapted to the guide rail is installed on the lower surface of the test tube rack. The sliding block is slidably connected to the outer side wall of the guide rail. The adsorption seat is fixedly connected to the rear part of the lower surface of the test tube rack. The test tube rack has a double-layer structure. An upper positioning ring is embedded in the upper layer of the test tube rack. A lower positioning seat is fixedly connected to the lower layer of the test tube rack. The upper positioning ring and the lower positioning seat are coaxially arranged, and an elastic limiting member distributed in a ring is fixedly connected to the lower surface of the upper positioning ring.

[0006] As a further preferred embodiment of this technical solution: the position of the adsorption seat corresponds to the position of the magnetic block, and the adsorption seat is attracted to the magnetic block by magnetic force.

[0007] As a further preferred embodiment of this technical solution: a sample tube is provided inside the upper positioning ring, the outer wall of the sample tube is fitted with the elastic limiting member, and the bottom end is inserted into the interior of the lower positioning seat.

[0008] As a further preferred embodiment of this technical solution: the lower front part of the test tube rack is fixedly connected with a handle.

[0009] As a further preferred embodiment of this technical solution: a base is fixedly connected to the lower surface of the mounting bracket, and an automatic sample feeding structure is mounted on the base.

[0010] As a further preferred embodiment of this technical solution: the automatic injection structure includes an X-axis linear module, an automatic injection needle, a mounting base, and a Z-axis linear module; The automatic injection needle is mounted on the slider of the Z-axis linear module via a mounting base, and the Z-axis linear module is mounted on the slider of the X-axis linear module.

[0011] As a further preferred embodiment of this technical solution: two support frames are fixedly connected to the rear of the upper surface of the base, and the X-axis linear module is installed on the top of the two support frames.

[0012] As a further preferred embodiment of this technical solution: the automatic injection needle is located directly above the sample tube.

[0013] Advantages of this utility model: 1. This utility model allows the test tube rack to be pulled away from the automatic injection needle by the handle, at which point the sample test tube can be installed. After installation, the test tube rack is pushed back to its original position. When the test tube rack reaches the predetermined position, the adsorption seat contacts and adsorbs the magnetic block, thereby achieving stable positioning of the test tube rack. 2. By equipping the test tube installation component, this utility model can pull the test tube rack out and away from the injection needle during the process of taking out or putting in the test tube rack, thereby reserving more space for the installation or removal of test tubes. In this way, the injection needle no longer restricts the operating space of the hand, effectively improving the sample loading efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the test tube mounting assembly structure of this utility model; Figure 3 This is an exploded view of the test tube mounting assembly structure of this utility model. Figure 4 This is a schematic diagram of the lower positioning seat structure of this utility model; Figure 5 This is a schematic diagram of the elastic limiting component of this utility model.

[0016] In the diagram: 101, test tube mounting assembly; 11, mounting bracket; 12, limiting seat; 13, magnetic block; 14, guide rail; 15, test tube rack; 16, sample test tube; 17, upper positioning ring; 18, elastic limiting component; 19, lower positioning seat; 20, adsorption seat; 21, handle; 22, sliding block; 31, base; 32, support frame; 33, X-axis linear module; 34, automatic injection needle; 35, mounting bracket; 36, Z-axis linear module. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example Please see Figures 1-5 The present invention provides a technical solution: an automatic sampler structure, including a mounting frame 11, on which a test tube mounting assembly 101 is mounted; The test tube mounting assembly 101 includes a limiting seat 12, a magnetic block 13, a test tube rack 15, and an adsorption seat 20; The upper surface of the mounting bracket 11 is equipped with a guide rail 14, and the lower surface of the test tube rack 15 is equipped with a sliding block 22 that is compatible with the guide rail 14. The sliding block 22 is slidably connected to the outer wall of the guide rail 14. Through the cooperation of the sliding block 22 and the guide rail 14, the position of the test tube rack 15 can be flexibly adjusted. Both guide rail 14 and sliding block 22 require regular lubrication to ensure smooth movement. During the sample injection process, the test tube rack 15 is moved directly below the injection needle to facilitate accurate sample collection; When installing or removing test tubes, the test tube rack 15 is moved to the front of the injection needle and completely removed from the area directly below the injection needle, thus facilitating operation; The adsorption seat 20 is fixedly connected to the rear of the lower surface of the test tube rack 15. The magnetic block 13 is fixedly connected to the upper surface of the mounting frame 11 through the limiting seat 12. The position of the adsorption seat 20 corresponds to the position of the magnetic block 13, and it is attracted to the magnetic block 13 by magnetic force. The position of the magnetic block 13 can be precisely limited by the limiting seat 12. Through the cooperation of the magnetic block 13 and the adsorption seat 20, the position of the test tube rack 15 can be effectively limited. After the test tubes are installed in the test tube rack 15, the test tube rack 15 is pushed to move along the guide rail 14. The test tube rack 15 then moves the adsorption seat 20. When the test tube rack 15 reaches the predetermined position, the adsorption seat 20 contacts and adsorbs the magnetic block 13, thereby achieving stable positioning of the test tube rack 15 and ensuring the accuracy of the sampling process. The test tube rack 15 has a double-layer structure. The upper layer of the test tube rack 15 is embedded with an upper positioning ring 17, and the lower layer of the test tube rack 15 is fixedly connected with a lower positioning seat 19. The upper positioning ring 17 and the lower positioning seat 19 are coaxially arranged, and the lower surface of the upper positioning ring 17 is fixedly connected with an elastic limiting member 18 distributed in a ring. The elastic limiting member 18 is a metal sheet made of spring steel, and its lower part is drawn into the interior of the upper positioning ring 17, and its bottom end is bent upward. The sample tube 16 is provided inside the upper positioning ring 17. The outer wall of the sample tube 16 is in contact with the elastic limiting member 18, and the bottom end is inserted into the lower positioning seat 19. The lower positioning seat 19 has an arc-shaped limiting groove inside to limit the bottom position of the sample tube 16. Furthermore, the position of the sample tube 16 can be limited by the cooperation of the upper positioning ring 17, the elastic limiting member 18 and the lower positioning seat 19; When placing the sample tube 16 into the test tube rack 15, first pass the bottom end of the sample tube 16 through the upper positioning ring 17 from above, then push the sample tube 16 downwards to make it fit with the elastic limiting member 18, and finally insert it into the interior of the lower positioning seat 19. At this time, the upper positioning ring 17, the elastic limiting member 18 and the lower positioning seat 19 can limit the upper, middle and bottom positions of the sample tube 16.

[0019] In this embodiment, specifically: a handle 21 is fixedly connected to the front of the lower layer of the test tube rack 15, which facilitates pulling the test tube rack 15. Before pulling, the injection needle of the test tube rack 15 is in a non-working raised state.

[0020] In this embodiment, specifically: a base 31 is fixedly connected to the lower surface of the mounting bracket 11, and an automatic sample injection structure is installed on the base 31. The automatic sample injection structure includes an X-axis linear module 33, an automatic sample injection needle 34, a mounting base 35, and a Z-axis linear module 36. The autosampler needle 34 is mounted on the slider of the Z-axis linear module 36 via the mounting base 35. The Z-axis linear module 36 is mounted on the slider of the X-axis linear module 33. Two support frames 32 are fixedly connected to the rear of the upper surface of the base 31. The X-axis linear module 33 is mounted on the top of the two support frames 32. The autosampler needle 34 is located directly above the sample tube 16. Through the cooperation of the X-axis linear module 33 and the Z-axis linear module 36, the autosampler needle 34 can achieve displacement in the X-axis and Z-axis directions, thereby automatically extracting the sample in the sample tube 16. In this utility model, the automatic injection needle 34 and the linear module are both existing technologies, so their internal structure, working principle, connection and control methods will not be described in detail.

[0021] Working principle or structural principle: During use, by pulling the test tube rack 15 with handle 21, the test tube rack 15 moves away from the automatic injection needle 34. At this time, the sample test tube 16 can be installed. The user holds the test tube rack 15 steady with one hand, and with the other hand, passes the bottom end of the sample test tube 16 through the upper positioning ring 17 from above. Then, the sample test tube 16 is pushed down so that it fits against the elastic limiting member 18 and is finally inserted into the lower positioning seat 19. Then, by pushing the test tube rack 15 with handle 21, the test tube rack 15 moves along the guide rail 14. When the test tube rack 15 reaches the predetermined position, the adsorption seat 20 contacts and adsorbs the magnetic block 13, thereby achieving stable positioning of the test tube rack 15. Through the cooperation of the X-axis linear module 33 and the Z-axis linear module 36, the automatic injection needle 34 can achieve displacement in the X-axis and Z-axis directions, thereby automatically extracting the sample in the sample test tube 16. Compared with the prior art, this utility model, by equipping a test tube installation component 101, can pull out and move away from the injection needle during the process of taking out or putting in the test tube rack 15, thereby reserving more space for the installation or removal of test tubes. In this way, the injection needle no longer restricts the operating space of the hand, effectively improving the sample loading efficiency.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic sampler structure, characterized in that, Includes a mounting bracket (11) on which a test tube mounting assembly (101) is mounted. The test tube mounting assembly (101) includes a limiting seat (12), a magnet (13), a test tube rack (15), and an adsorption seat (20). The magnetic block (13) is fixedly connected to the upper surface of the mounting frame (11) by the limiting seat (12). The upper surface of the mounting frame (11) is equipped with a guide rail (14). The lower surface of the test tube rack (15) is equipped with a sliding block (22) that is compatible with the guide rail (14). The sliding block (22) is slidably connected to the outer side wall of the guide rail (14). The adsorption seat (20) is fixedly connected to the rear part of the lower surface of the test tube rack (15). The test tube rack (15) has a double-layer structure. The upper layer of the test tube rack (15) is embedded with an upper positioning ring (17). The lower layer of the test tube rack (15) is fixedly connected with a lower positioning seat (19). The upper positioning ring (17) and the lower positioning seat (19) are coaxially arranged. The lower surface of the upper positioning ring (17) is fixedly connected with an elastic limiting member (18) distributed in a ring.

2. The autosampler structure according to claim 1, characterized in that, The position of the adsorption seat (20) corresponds to the position of the magnetic block (13), and it is attracted to the magnetic block (13) by magnetic force.

3. The autosampler structure according to claim 1, characterized in that, The sample tube (16) is provided inside the upper positioning ring (17). The outer wall of the sample tube (16) is in contact with the elastic limiting member (18), and the bottom end is inserted into the lower positioning seat (19).

4. The autosampler structure according to claim 1, characterized in that, The lower front part of the test tube rack (15) is fixedly connected to a handle (21).

5. The autosampler structure according to claim 4, characterized in that, The mounting bracket (11) is fixedly connected to a base (31), and an automatic sample feeding structure is installed on the base (31).

6. The autosampler structure according to claim 5, characterized in that, The automatic injection structure includes an X-axis linear module (33), an automatic injection needle (34), a mounting base (35), and a Z-axis linear module (36). The autosampler needle (34) is mounted on the slider of the Z-axis linear module (36) via a mounting base (35), and the Z-axis linear module (36) is mounted on the slider of the X-axis linear module (33).

7. An autosampler structure according to claim 6, characterized in that, Two support frames (32) are fixedly connected to the rear of the upper surface of the base (31), and the X-axis linear module (33) is installed on the top of the two support frames (32).

8. An autosampler structure according to claim 7, characterized in that, The autosampler needle (34) is located directly above the sample tube (16).

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