A sample introduction device for a fluorescence spectrophotometer

Abstract

This utility model discloses a sample introduction device for a fluorescence spectrophotometer, including a base. An installation cavity is formed in the middle of the upper end of the base, and a servo motor is fixed inside the installation cavity. A T-shaped rotating disk is mounted on the output shaft of the servo motor. The advantages are as follows: This utility model uses an insertion-type sample introduction structure composed of a guide needle, a telescopic sample introduction tube, an electric push rod, a sealing ring, and a rubber gasket. During the sample introduction process, when a set of test tubes is adjusted to be directly above the sample introduction tube, the electric push rod can move the movable part of the sample introduction tube upwards, allowing the guide needle to pass through the sealing gasket and be placed inside the sample introduction tube. At this time, a metering pump quantitatively extracts and injects the sample liquid. After the injection is completed, the sample introduction tube is reset and separated from the guide needle for subsequent injections. This method maintains the sample introduction tube in a sealed state, effectively preventing impurities and bacteria from contaminating the sample liquid and ensuring the sample introduction effect of the device.

Description

Technical Field

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

[0002] A fluorescence spectrophotometer is an instrument used to scan the fluorescence spectrum emitted by liquid-phase fluorescent labels. It provides numerous physical parameters, including excitation and emission spectra, as well as fluorescence intensity, quantum yield, fluorescence lifetime, and fluorescence polarization, reflecting the bonding and structure of molecules from various perspectives. By measuring these parameters, not only can general quantitative analysis be performed, but also conformational changes of molecules under various environments can be inferred, thus elucidating the relationship between molecular structure and function. The excitation wavelength scanning range of a fluorescence spectrophotometer is typically 190–650 nm, and the emission wavelength scanning range is 200–800 nm. It can be used for spectral scanning of liquid and solid samples (such as gel strips).

[0003] The existing sample introduction device of a fluorescence spectrophotometer uses a rotating method to sequentially rotate the storage tube above the sample introduction tube, and then the sample liquid flows into the feed tube when the storage tube is opened. This method achieves sample introduction by rotating the sample introduction tube, which is always exposed during the sample introduction process. As a result, bacteria and impurities can easily adhere to its surface, affecting the sample liquid and causing inaccurate detection results. Consequently, the sample introduction effect of the device is poor and its performance is low. Therefore, there is an urgent need for a sample introduction device for a fluorescence spectrophotometer. Utility Model Content

[0004] (a) Technical problems to be solved The technical problem to be solved by this utility model is to provide a sample introduction device for a fluorescence spectrophotometer, based on the current state of the technology.

[0005] (II) Technical Solution This utility model is achieved through the following technical solution: This utility model proposes a sample injection device for a fluorescence spectrophotometer, including a base. An installation cavity is formed in the middle of the upper end of the base. A servo motor is fixed inside the installation cavity. A T-shaped rotating disk is mounted on the output shaft of the servo motor. Six sets of test tubes are arranged circumferentially on the rotating disk. A guide tube is pre-installed at the bottom of each test tube. A metering pump is installed on the guide tube. A guide needle is fixed at the bottom of the guide tube. A telescopic injection tube is fixed on one side of the upper end of the base, directly below one set of guide needles. An electric push rod is fixed inside the injection tube. A sealing ring is installed at the top of the injection tube, and a sealing gasket is provided inside the sealing ring. A sample injection tube is pre-installed in the middle of the bottom end of the injection tube.

[0006] Furthermore, the servo motor is bolted into the base, and the rotating disk is bolted to the output shaft of the servo motor.

[0007] Furthermore, the test tube is embedded in the rotating disk, and a sealing knob is threaded onto the top of the test tube.

[0008] Furthermore, the flow guide tube is formed at the bottom of the test tube, and the metering pump is fixed to the flow guide tube by bolts.

[0009] Furthermore, the guide needle is threaded onto the bottom end of the guide tube, and one end of the guide needle has a pointed structure.

[0010] Furthermore, the injection tube is fixed to the base by screws, and the electric push rod is fixed between the fixed part and the movable part of the injection tube.

[0011] Furthermore, the sealing ring is connected to the movable part of the injection tube by a thread, and the sealing gasket is adhered inside the sealing ring.

[0012] Furthermore, the injection tube is threaded onto the bottom end of the inlet tube, and the injection tube is a flexible tube.

[0013] (III) Beneficial Effects Compared with the prior art, this utility model has the following advantages: This invention employs an insertion-type sample injection structure consisting of a guide needle, a telescopic sample injection tube, an electric push rod, a sealing ring, and a rubber gasket. During the injection process, when a set of test tubes is adjusted to be directly above the sample injection tube, the electric push rod moves the movable part of the sample injection tube upward, allowing the guide needle to pass through the sealing gasket and be placed inside the sample injection tube. At this point, a metering pump quantitatively extracts and injects the sample solution. After the injection is completed, the sample injection tube is reset and separated from the guide needle, allowing for subsequent injections. This method maintains the sample injection tube in a sealed state, effectively preventing impurities and bacteria from contaminating the sample solution and ensuring the sampling effect of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the sample introduction device of the fluorescence spectrophotometer described in this utility model; Figure 2 This is a schematic diagram of the internal structure of the sample introduction device base of the fluorescence spectrophotometer described in this utility model; Figure 3 This is a schematic diagram of the internal structure of the injection tube in the injection device of the fluorescence spectrophotometer described in this utility model.

[0015] The annotations in the attached figures are explained as follows: 1. Base; 2. Rotary disk; 3. Test tube; 4. Sealing knob; 5. Guide tube; 6. Metering pump; 7. Guide needle; 8. Sample inlet tube; 9. Injection tube; 10. Servo motor; 11. Sealing ring; 12. Sealing gasket; 13. Electric push rod. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] like Figures 1-3 As shown, the sample introduction device of a fluorescence spectrophotometer in this embodiment includes a base 1. A mounting cavity is formed in the middle of the upper end of the base 1, and a servo motor 10 is fixed inside the mounting cavity. This servo motor 10 can drive the test tubes 3 to rotate via a rotating disk 2, thereby positioning them sequentially above the sample introduction tubes 8. A T-shaped rotating disk 2 is mounted on the output shaft of the servo motor 10. Six sets of test tubes 3 are arranged circumferentially on the rotating disk 2 for storing sample solutions. A guide tube 5 is provided at the bottom of each test tube 3, and a metering pump 6 is installed on the guide tube 5 to inject the sample solution. For quantitative extraction, a guide needle 7 is fixed at the bottom of the guide tube 5, which can puncture the sealing gasket 12. A telescopic sample inlet tube 8 is fixed on one side of the upper end of the base 1 and directly below a set of guide needles 7. An electric push rod 13 is fixed inside the sample inlet tube 8, which can adjust the height of the sample inlet tube 8. A sealing ring 11 is installed at the top of the sample inlet tube 8, and a sealing gasket 12 is set inside the sealing ring 11 to seal the sample inlet tube 8. A sample injection tube 9 is reserved in the middle of the bottom end of the sample inlet tube 8, which can introduce the sample liquid injected into the sample inlet tube 8 into the detection mechanism.

[0018] like Figures 1-3 In this embodiment, the servo motor 10 is bolted into the base 1, the rotating disk 2 is bolted onto the output shaft of the servo motor 10, the test tube 3 is embedded in the rotating disk 2, and the top of the test tube 3 is threaded with a sealing knob 4. During use, the sample liquid is injected into the test tube 3 and sealed with the top of the test tube 3 by the sealing knob 4. During the sample injection process, the servo motor 10 drives the test tube 3 to be positioned above the sample injection tube 8 in sequence through the rotating disk 2 for sample injection.

[0019] like Figures 1-3In this embodiment, the guide tube 5 is formed at the bottom of the test tube 3, the metering pump 6 is fixed to the guide tube 5 by bolts, the guide needle 7 is threaded onto the bottom end of the guide tube 5, one end of the guide needle 7 is a pointed structure, the injection tube 8 is fixed to the base 1 by screws, the electric push rod 13 is fixed between the fixed part and the movable part of the injection tube 8, the sealing ring 11 is threaded to the movable part of the injection tube 8, the sealing gasket 12 is bonded inside the sealing ring 11, and the injection tube 9 is threaded onto the bottom end of the injection tube 8. The injection tube 9 is a flexible tube, and one end of the injection tube 9 is connected to the fluorescent dye. The spectrophotometer's detection mechanism is connected. During the sample injection process, when a set of test tubes 3 is adjusted to be directly above the injection tube 8, the moving part of the injection tube 8 can be moved upward by the electric push rod 13, so that the guide needle 7 passes through the sealing gasket 12 and is placed inside the injection tube 8. At this time, the sample liquid is quantitatively extracted and injected by the metering pump 6. After the injection is completed, the injection tube 8 is reset and separated from the guide needle 7, and subsequent injections can be performed. This method can keep the injection tube 8 in a sealed state at all times, which can effectively avoid impurities and bacteria from contaminating the sample liquid and ensure the injection effect of the device.

[0020] The specific implementation process of this embodiment is as follows: The device is fixed on the fluorescence spectrophotometer and one end of the injection tube 9 is connected to the detection mechanism of the fluorescence spectrophotometer. An external power supply is turned on. During use, the sample liquid is injected into the test tube 3 and sealed with the top of the test tube 3 by the sealing knob 4. During the injection process, the servo motor 10 drives the test tube 3 to be positioned above the injection tube 8 in sequence through the rotating disk 2 for injection. At this time, the electric push rod 13 drives the movable part of the injection tube 8 to move upward, so that the guide needle 7 passes through the sealing gasket 12 and is placed in the injection tube 8. Then, the metering pump 6 quantitatively extracts and injects the sample liquid. After the injection is completed, the injection tube 8 is reset and separated from the guide needle 7, and subsequent injections can be performed. This method can keep the injection tube 8 sealed at all times, which can effectively avoid impurities and bacteria from contaminating the sample liquid and ensure the injection effect of the device.

[0021] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sample introduction device for a fluorescence spectrophotometer, characterized in that: The system includes a base (1), with an installation cavity in the middle of the upper end of the base (1). A servo motor (10) is fixed in the installation cavity. A T-shaped rotating disk (2) is installed on the output shaft of the servo motor (10). Six sets of test tubes (3) are arranged in a circle on the rotating disk (2). A guide tube (5) is reserved at the bottom of the test tube (3). A metering pump (6) is installed on the guide tube (5). A guide needle (7) is fixed at the bottom of the guide tube (5). A telescopic injection tube (8) is fixed on one side of the upper end of the base (1) and directly below a set of guide needles (7). An electric push rod (13) is fixed inside the injection tube (8). A sealing ring (11) is installed at the top of the injection tube (8). A sealing gasket (12) is provided inside the sealing ring (11). A sample injection tube (9) is reserved in the middle of the bottom end of the injection tube (8).

2. The sample introduction device for a fluorescence spectrophotometer according to claim 1, characterized in that: The servo motor (10) is bolted into the base (1), and the rotating disk (2) is bolted onto the output shaft of the servo motor (10).

3. The sample introduction device for a fluorescence spectrophotometer according to claim 2, characterized in that: The test tube (3) is embedded in the rotating disk (2), and a sealing knob (4) is installed at the top of the test tube (3) by thread.

4. The sample introduction device for a fluorescence spectrophotometer according to claim 3, characterized in that: The guide tube (5) is formed at the bottom of the test tube (3), and the metering pump (6) is fixed to the guide tube (5) by bolts.

5. The sample introduction device for a fluorescence spectrophotometer according to claim 1, characterized in that: The guide needle (7) is threaded onto the bottom end of the guide tube (5), and one end of the guide needle (7) is a pointed structure.

6. The sample introduction device for a fluorescence spectrophotometer according to claim 5, characterized in that: The injection tube (8) is fixed to the base (1) by screws, and the electric push rod (13) is fixed between the fixed part and the movable part of the injection tube (8).

7. The sample introduction device for a fluorescence spectrophotometer according to claim 6, characterized in that: The sealing ring (11) is connected to the movable part of the injection tube (8) by a thread.

8. The sample introduction device for a fluorescence spectrophotometer according to claim 7, characterized in that: The sealing gasket (12) is bonded to the sealing ring (11).

9. The sample introduction device for a fluorescence spectrophotometer according to claim 8, characterized in that: The injection tube (9) is threaded onto the bottom end of the injection tube (8), and the injection tube (9) is a flexible tube.

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