Sampling device of spectrophotometer

Abstract

The utility model discloses a spectrophotometer sampling device which comprises a bottom plate, a spectrophotometer is mounted on one side of the bottom plate, a feeding hole is formed in the top of the spectrophotometer, a test tube rack for placing a test tube is mounted on the other side of the bottom plate, a support frame is mounted on the bottom plate, and translation components are arranged on the inner walls of the two sides of the support frame; a mounting frame is arranged at the moving end of the translation assembly, a first electric push rod is mounted on the mounting frame, the end part of the telescopic end of the first electric push rod penetrates through the mounting frame and is provided with a movable plate, and a sampling assembly for sucking a solution in a test tube is mounted at the bottom of the movable plate. According to the utility model, by utilizing the translation component, the sampling component can stably move back and forth between the test tube and the feed port, so that a solution in the test tube can be conveniently transferred to the feed port, and automatic and continuous sampling of the solution is realized.

Description

Technical Field

[0001] This utility model relates to the field of spectrophotometer technology, and more specifically, to a spectrophotometer sample introduction device. Background Technology

[0002] Spectrophotometers are required for testing textiles. Currently, sample introduction is typically done manually, involving transferring the sample to the spectrophotometer's sample chamber using pipettes or other tools. Manual sample handling is not only inefficient but also prone to introducing human error, affecting the accuracy and repeatability of experimental results. Furthermore, manual operation is inefficient for processing large numbers of samples or conducting continuous testing over extended periods.

[0003] Therefore, a new solution is needed to address the above problems. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a spectrophotometer sample injection device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A spectrophotometer sample introduction device includes a base plate, on one side of which a spectrophotometer is mounted, and a feed inlet is provided at the top of the spectrophotometer. On the other side of the base plate, a test tube rack for placing test tubes is mounted. A support frame is mounted on the base plate, and translation components are provided on the inner walls of both sides of the support frame. A mounting frame is provided at the moving end of the translation components. A first electric push rod is mounted on the mounting frame. The end of the telescopic end of the first electric push rod passes through the mounting frame and is mounted with a movable plate. A sampling component for aspirating the solution from the test tubes is mounted at the bottom of the movable plate.

[0007] Furthermore, the sampling assembly includes a mounting base, which is installed on the bottom of the movable plate. A second electric push rod is mounted on the mounting base, and a liquid collection tube is installed at the bottom of the mounting base. A piston adapted to the liquid collection tube is provided inside the liquid collection tube. The end of the telescopic end of the second electric push rod passes through the mounting base and extends into the liquid collection tube. The end of the telescopic end of the second electric push rod is connected to the piston.

[0008] Furthermore, the sampling assembly also includes a limiting ring, which is installed inside the liquid sampling tube and located above the piston, with the telescopic end of the second electric push rod passing through the limiting ring.

[0009] Furthermore, the piston is mounted on a piston holder, which is located between the piston and the limiting ring.

[0010] Furthermore, the first electric push rod drives the sampling port of the liquid sampling tube to be vertically inserted into the test tube and completely submerged in the solution until it is located at the bottom of the test tube.

[0011] Furthermore, the translation component includes a lead screw, with its two ends rotatably mounted on the inner walls of both sides of the support frame. One end of the lead screw passes through the support frame and is connected to a drive motor. A moving block is threaded onto the outer wall of the lead screw, and the mounting frame is mounted on one side wall of the moving block.

[0012] Furthermore, a slider is fixedly connected to the top of the movable block, and a groove adapted to the slider is opened on the inner top of the support frame, and the top of the slider is slidably connected to the groove.

[0013] Furthermore, the drive motor is mounted on one side wall of the support frame, and the output end of the drive motor is connected to one end of the lead screw.

[0014] Furthermore, the test tube rack is provided with a placement slot for placing test tubes, and the placement slot, test tube, feed inlet and liquid collection tube are located on the same vertical plane.

[0015] The beneficial effects of this utility model are:

[0016] 1. In this utility model, by using the translation component, the sampling component can be moved back and forth smoothly between the test tube and the feed inlet, thereby facilitating the transfer of the solution in the test tube to the feed inlet and realizing automatic continuous injection of the solution.

[0017] 2. In this invention, the precise stroke control of the first and second electric actuators is used to control the amount of solution drawn, which improves the efficiency and accuracy of the experiment, reduces the need for manual operation, thereby reducing experimental errors, enhancing the reliability of experimental results, and improving the consistency and reliability of experimental data.

[0018] 3. In this utility model, a limiting ring is set to limit the movement range of the piston, prevent the piston from moving excessively and causing inaccurate absorption, and ensure the accuracy of the solution volume absorbed by the liquid extraction tube each time. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a spectrophotometer sample introduction device in this embodiment;

[0020] Figure 2 This is a schematic diagram of a connection structure between the moving block and the support block in this embodiment;

[0021] Figure 3 This is a schematic cross-sectional view of the sampling tube in this embodiment;

[0022] Figure 4This is a schematic diagram of a connection structure between the cylinder and the silicone sheet in this embodiment;

[0023] Figure 5 This is a schematic diagram of one structure of the silicone sheet in this embodiment;

[0024] Figure 6 This is a schematic diagram of one structure of the liquid collection tube in this embodiment.

[0025] Reference numerals in the attached drawings: 1. Base plate; 2. Spectrophotometer; 3. Feed inlet; 4. Test tube rack; 5. Support frame; 6. Translation assembly; 6. Lead screw; 61. Drive motor; 62. Moving block; 63. Sliding block; 64. Slide groove; 65. Mounting frame; 7. First electric push rod; 8. Movable plate; 9. Sampling assembly; 10. Mounting base; 101. Second electric push rod; 102. Liquid collection tube; 103. Tube body; 1031. Liquid collection port; 1032. Protrusion; 1033. Piston; 104. Limiting ring; 105. Piston frame; 106. Placement groove; 11. Test tube; 12. Cylinder body; 13. Silicone sheet; 14. Arc-shaped protrusion; 15. Detailed Implementation

[0026] 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.

[0027] Example: A spectrophotometer sample introduction device, such as... Figures 1-6 As shown, the system includes a base plate 1. A spectrophotometer 2 is mounted on one side of the base plate 1. The spectrophotometer 2 is used to measure the degree of absorption of a solution by a specific wavelength of light. The top of the spectrophotometer 2 is provided with a feed inlet 3, which is used to introduce the absorbed solution into the spectrophotometer 2. A test tube rack 4 is mounted on the other side of the base plate 1. The test tube rack 4 is used to place test tubes 12, which contain the solution to be tested.

[0028] A support frame 5 is mounted on the base plate 1. The support frame 5 has a U-shaped structure, with one side located outside the spectrophotometer 2 and the other side located outside the test tube rack 4. Translation components 6 are provided on the inner walls of both sides of the support frame 5. A mounting frame 7 is provided at the moving end of the translation component 6. A first electric push rod 8 is mounted on the mounting frame 7. The telescopic end of the first electric push rod 8 passes through the mounting frame 7 and is fitted with a movable plate 9. A sampling component 10 for drawing solution from the test tube 12 is mounted at the bottom of the movable plate 9. The translation component 6 drives the mounting frame 7 to move horizontally, allowing the sampling component 10 to move to the test tube 12 and the inlet 3 position on the test tube rack 4. Simultaneously, the stroke of the sampling component 10 is precisely controlled by the first electric push rod 8, ensuring that the sampling port of the liquid extraction tube 103 in the sampling component 10 is perpendicular to the solution and completely submerged in the solution until it reaches the bottom of the test tube 12, thus preventing air from entering during liquid extraction.

[0029] Furthermore, such as Figure 1 and Figure 3 As shown, the sampling assembly 10 includes a mounting base 101, which is mounted on the bottom of the movable plate 9. A second electric push rod 102 is mounted on the mounting base 101, and a liquid collection tube 103 is mounted on the bottom of the mounting base 101. A piston 104 adapted to the liquid collection tube 103 is provided inside the liquid collection tube 103. The telescopic end of the second electric push rod 102 passes through the mounting base 101 and extends into the liquid collection tube 103, and the telescopic end of the second electric push rod 102 is connected to the piston 104. Through the above structural design, the negative pressure generated by the movement of the piston 104 is used to draw the solution, and the amount of solution drawn is controlled by the precise control of the piston 104 stroke by the second electric push rod 102. The automation and precise control of the entire process make the solution drawing faster and more standardized, reduce the possibility of human error, and improve the consistency and reliability of experimental data.

[0030] Preferably, the sampling assembly 10 further includes a limiting ring 105, which is installed inside the liquid collection tube 103 and located above the piston 104. The telescopic end of the second electric push rod 102 passes through the limiting ring 105. The limiting ring 105 restricts the movement range of the piston 104 by abutting against it, preventing excessive movement of the piston 104 that could lead to inaccurate aspiration.

[0031] Preferably, piston 104 is mounted on piston holder 106, which is located between piston 104 and retaining ring 105. Piston holder 106 contacts retaining ring 105 before piston 104, protecting piston 104 and extending its service life. Simultaneously, by controlling and adjusting the movement speed of the second electric push rod 102, piston 104 moves smoothly, preventing excessive piston speed and resulting deviations in suction volume.

[0032] Furthermore, such as Figure 1As shown, the translation component 6 includes a lead screw 61, with both ends of the lead screw 61 rotatably mounted on the inner walls of both sides of the support frame 5. One end of the lead screw 61 passes through the support frame 5 and is connected to a drive motor 62. A moving block 63 is threaded onto the outer wall of the lead screw 61, and a mounting frame 7 is fixedly mounted on one side wall of the moving block 63. When the lead screw 61 rotates, the moving block 63 moves horizontally along the lead screw 61, thereby driving the mounting frame 7 and the sampling component 10 to move horizontally.

[0033] like Figure 2 As shown, a slider 64 is fixedly connected to the top of the moving block 63, and a groove 65 adapted to the slider 64 is provided on the inner top of the support frame 5. The top of the slider 64 is slidably connected to the groove 65. The cooperation between the slider 64 and the groove 65 further enhances the stability of the moving block 63 during horizontal movement, prevents it from shaking or deviating, and ensures that the sampling component 10 can accurately position itself at the test tube 12 and the inlet 3, thereby improving the accuracy of sampling.

[0034] The drive motor 62 is mounted on one side wall of the support frame 5. The output shaft of the drive motor 62 is connected to one end of the lead screw 61. The drive motor 62 can control the rotation angle and speed of the lead screw 61, thereby controlling the moving distance and speed of the moving block 63. This control method enables the sampling component 10 to reach the designated position quickly and accurately, improving the efficiency of continuous feeding.

[0035] Furthermore, such as Figure 1 As shown, the test tube rack 4 is provided with several sets of placement slots 11 for placing test tubes 12. When the test tube 12 is placed in the placement slot 11, the test tube 12 is in a vertical position. The placement slot 11, test tube 12, feed inlet 3 and liquid collection tube 103 are located on the same vertical plane. With the above structural design, the liquid collection tube 103 is moved to the top of the test tube 12 in the test tube rack 4 under the drive of the translation component 6, and draws the solution from the test tube 12. Then, under the drive of the translation component 6, it is moved to the top of the feed inlet 3 and the solution is sent into the spectrophotometer 2 through the feed inlet 3. This reduces the solution transfer steps, reduces the risk of solution contamination and loss, and improves the accuracy and reliability of the experiment.

[0036] Furthermore, such as Figure 1 , Figure 4 , Figure 5 and Figure 6As shown, a cylindrical body 13 is fitted onto the open end of the test tube 12. Multiple sets of silicone sheets 14 are arranged along the circumference of the inner wall of the cylindrical body 13. The silicone sheets 14 are triangular in shape, and multiple sets of silicone sheets 14 are combined to form a circular structure. The thickness of the silicone sheets 14 is 1 mm. Multiple sets of arc-shaped protrusions 15 are provided on the side of each set of silicone sheets 14 facing the bottom of the test tube 12. The multiple sets of arc-shaped protrusions 15 are coaxially arranged, and the arc-shaped protrusions 15 slightly protrude from the surface of the silicone sheet 14, such as 0.5-1 mm. The arc-shaped protrusions 15 are made of silicone. When the liquid collection tube 103 is located in the test tube 12 and the liquid collection is completed and moves upward, the silicone sheet 14 abuts against the outer surface of the liquid collection tube 103 through its deformation. Multiple sets of arc-shaped protrusions 15 squeeze the outer surface of the liquid collection tube 103 in sequence, scraping off the solution remaining on the outer surface of the liquid collection tube 103, and preventing the solution remaining on the outer surface of the liquid collection tube 103 from dripping during the transfer of the liquid collection tube 103. At the same time, the end corners of the multiple sets of silicone sheets 14 abut against each other and cooperate with the arc-shaped protrusions 15, which can scrape off the solution remaining on the outer surface and end of the liquid collection port 1032 of the liquid collection tube 103. Preferably, the liquid collection tube 103 includes a tube body 1031 and a liquid collection port 1032 connected to the tube body 1031. A conical protrusion 1033 is fitted onto the connection point between the liquid collection port 1032 and the tube body 1031. The protrusion 1033 is fixedly connected to the liquid collection port 1032. By providing the protrusion 1033, a smooth transition is achieved between the liquid collection port 1032 and the tube body 1031, facilitating the scraping of solution from the outer surface of the liquid collection tube 103. Preferably, the cylinder 13 and the test tube 12 are detachably connected. For example, an installation groove adapted to the test tube 12 is provided on the cylinder 13. The cylinder 13 is fitted onto the test tube 12 through the installation groove. When the cylinder 13 is installed on the test tube 12, there is good and stable connection between the cylinder 13 and the test tube 12, preventing the liquid collection tube 103 from moving and detaching from the test tube 12.

[0037] In use, place the test tube 12 containing the solution in the placement slot 11 of the test tube rack 4; then, start the drive motor 62, which drives the lead screw 61 to rotate. The moving block 63 on the lead screw 61 moves horizontally along the lead screw 61 with the cooperation of the slider 64 and the sliding groove 65, thereby moving the mounting frame 7 and the sampling assembly 10 to directly above the test tube 12; next, the telescopic end of the first electric push rod 8 drives the movable plate 9 and the liquid collection tube 103 to move downward until the liquid collection port 1032 of the liquid collection tube 103 is vertically inserted into the test tube 12 and located at the bottom of the test tube 12; then start the second electric push rod. 102. The telescopic end of the second electric push rod 102 pulls the piston 104, causing the piston 104 to move upward within the liquid collection tube 103, creating a negative pressure within the liquid collection tube 103, thereby drawing the required solution from the test tube 12. After the liquid collection is completed, the first electric push rod 8 drives the liquid collection tube 103 to move upward, and the drive motor 62 starts again, moving the liquid collection tube 103 to directly above the feed inlet 3. Then, the second electric push rod 102 drives the piston 104 to move downward, sending the solution in the liquid collection tube 103 into the spectrophotometer 2 through the feed inlet 3. Repeating the above steps can realize automatic continuous sample injection of the solution. It should be noted that before each liquid dispensing by the liquid dispensing tube 103, the piston 104 must be positioned at the liquid dispensing port 1032 of the liquid dispensing tube 103 and in contact with the inner bottom wall of the tube body 1031 of the liquid dispensing tube 103; after liquid is dispensed from the liquid dispensing tube 103, the piston 104 must be positioned at the liquid dispensing port 1032 of the liquid dispensing tube 103 and in contact with the inner bottom wall of the tube body 1031 of the liquid dispensing tube 103.

[0038] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A spectrophotometer sample introduction device, comprising a base plate (1), characterized in that, A spectrophotometer (2) is installed on one side of the base plate (1). The top of the spectrophotometer (2) is provided with a feed inlet (3). A test tube rack (4) for placing test tubes (12) is installed on the other side of the base plate (1). A support frame (5) is installed on the base plate (1). Translation components (6) are provided on the inner walls of both sides of the support frame (5). A mounting frame (7) is provided at the moving end of the translation component (6). A first electric push rod (8) is installed on the mounting frame (7). The end of the telescopic end of the first electric push rod (8) passes through the mounting frame (7) and is equipped with a movable plate (9). A sampling component (10) for aspirating the solution in the test tube (12) is installed at the bottom of the movable plate (9).

2. The spectrophotometer sample introduction device according to claim 1, characterized in that, The sampling assembly (10) includes a mounting base (101) which is mounted on the bottom of the movable plate (9). A second electric push rod (102) is mounted on the mounting base (101). A liquid collection tube (103) is mounted on the bottom of the mounting base (101). A piston (104) adapted to the liquid collection tube (103) is provided inside the liquid collection tube (103). The end of the telescopic end of the second electric push rod (102) passes through the mounting base (101) and extends into the liquid collection tube (103). The end of the telescopic end of the second electric push rod (102) is connected to the piston (104).

3. The spectrophotometer sample introduction device according to claim 2, characterized in that, The sampling assembly (10) also includes a limiting ring (105), which is installed inside the liquid collection tube (103) and located above the piston (104). The telescopic end of the second electric push rod (102) passes through the limiting ring (105).

4. The spectrophotometer sample introduction device according to claim 3, characterized in that, The piston (104) is mounted on a piston holder (106), which is located between the piston (104) and the limiting ring (105).

5. A spectrophotometer sample introduction device according to claim 2, characterized in that, The first electric push rod (8) drives the sampling port of the liquid sampling tube (103) to be vertically inserted into the test tube (12) and completely submerged in the solution until it is located at the bottom of the test tube (12).

6. The spectrophotometer sample introduction device according to claim 1, characterized in that, The translation component (6) includes a lead screw (61), with both ends of the lead screw (61) rotatably mounted on the inner walls of both sides of the support frame (5). One end of the lead screw (61) passes through the support frame (5) and is connected to a drive motor (62). A moving block (63) is threaded onto the outer wall of the lead screw (61), and the mounting bracket (7) is mounted on one side wall of the moving block (63).

7. The spectrophotometer sample introduction device according to claim 6, characterized in that, The top of the movable block (63) is fixedly connected to a slider (64), and the inner top of the support frame (5) is provided with a groove (65) that is adapted to the slider (64). The top of the slider (64) is slidably connected to the groove (65).

8. A spectrophotometer sample introduction device according to claim 6, characterized in that, The drive motor (62) is mounted on one side wall of the support frame (5), and the output end of the drive motor (62) is connected to one end of the lead screw (61).

9. A spectrophotometer sample introduction device according to claim 1, characterized in that, The test tube rack (4) is provided with a placement slot (11) for placing test tubes (12), and the placement slot (11), test tubes (12), feed inlet (3) and liquid collection tube (103) are located on the same vertical plane.

Images