Graphite furnace atomic absorption spectrometer

Abstract

The utility model relates to the technical field of analysis equipment, and provides a graphite furnace atomic absorption spectrometer which comprises a spectrometer main body and an automatic sampling device arranged on the spectrometer main body, the automatic sampling device comprises a rotating shaft which is rotatably arranged on the spectrometer main body through a rotating device, and a sample placing disc which is detachably connected with the rotating shaft through a quick release device.

Description

Technical Field

[0001] The utility model relates to the technical field of analytical equipment, and particularly relates to a graphite furnace atomic absorption spectrometer. Background Art

[0002] A graphite furnace atomic absorption spectrometer is a chemical detection instrument for trace element analysis. It mainly atomizes the analyte into gaseous atoms by using AAS, measures the absorption degree of the gaseous atoms to light waves, and then detects the content of specific elements contained. In order to improve the simplicity of use, most graphite furnace atomic absorption spectrometers usually set an automatically rotating sample injection disk, so as to simplify the operation steps. However, this also results in that the sample injection disk is usually fixed and cannot be disassembled, and the sample loading and sample changing can only be carried out after the detection is completed, which has a certain impact on the working efficiency. Content of the Utility Model

[0003] Therefore, in view of the above problems, the utility model provides a graphite furnace atomic absorption spectrometer.

[0004] To achieve the above object, the technical solution of the utility model provides a graphite furnace atomic absorption spectrometer, which includes a spectrometer main body and an automatic sample injection device arranged on the spectrometer main body. The automatic sample injection device includes: a rotating shaft rotatably arranged on the spectrometer main body through a rotating device, and a sample loading disk detachably connected to the rotating shaft through a quick-release device.

[0005] Further improvement is: the quick-release device includes: a connecting column penetrating through the middle of the sample injection disk, a positioning block arranged on the rotating shaft, and a positioning channel opened at the bottom of the connecting column and matching with the rotating shaft and the positioning block.

[0006] Further improvement is: a clamping device is also arranged between the connecting column and the positioning block to enhance the connection stability.

[0007] Further improvement is: the clamping device includes: a slot opened on the connecting column and corresponding to the positioning block, a rotating plate rotatably arranged on the slot through a rotating and resetting device and used for clamping with the positioning block, and a clamping block arranged on the rotating plate and matching with the positioning block and the positioning channel.

[0008] Further improvement is: the rotating and resetting device includes: a rotating rod fixedly arranged on the rotating plate and located above the clamping block, the rotating rod is rotatably connected with the slot, and a resetting device is also arranged between the rotating plate and the positioning channel.

[0009] Further improvement is: the resetting device includes: a first positioning column arranged on the rotating plate, a second positioning column arranged in the positioning channel, a spring is sleeved on the first positioning column and the second positioning column, and two ends of the spring are respectively fixedly connected with the first positioning column and the second positioning column.

[0010] Further improvement is that several limiting blocks for limiting the rotating shaft are also arranged in the positioning channel.

[0011] Further improvement is that a pressing block for facilitating the user to press the rotating plate is also arranged on the rotating plate.

[0012] Further improvement is that a first bevel angle is formed on the engaging block, and a second bevel angle matching the first bevel angle is formed on the positioning block.

[0013] Further improvement is that a handle for facilitating the user to hold and lift the sample layout plate is also arranged at the end of the connecting column.

[0014] Further improvement is that the rotating device includes a rotating motor arranged in the spectrometer main body. A rotating rod of the rotating motor passes through the spectrometer main body and is connected to a rotating shaft, and the rotating motor is electrically connected to the spectrometer main body.

[0015] The advantages and beneficial effects of the present utility model are as follows:

[0016] The structure is simple and the use is convenient. The sample layout plate and the rotating shaft are connected through a quick-release device, which is convenient for the user to alternately detect the samples on each sample layout plate. There is no need to wait for the detection to be completed and then re-layout the samples. When one sample layout plate is being detected, the samples can be laid out on another sample layout plate, improving the convenience of use and the detection efficiency. Description of the Drawings

[0017] Figure 1 It is a front view schematic diagram of a graphite furnace atomic absorption spectrometer of the present utility model;

[0018] Figure 2 It is a sectional view schematic diagram of a clamping device of a graphite furnace atomic absorption spectrometer of the present utility model;

[0019] Figure 3 It is a top view schematic diagram of a sample layout plate of a graphite furnace atomic absorption spectrometer of the present utility model;

[0020] Figure 4 It is an enlarged schematic diagram of part A of a graphite furnace atomic absorption spectrometer of the present utility model;

[0021] In the figure: 1, spectrometer main body; 2, rotating shaft; 3, sample layout plate; 4, connecting column; 5, positioning block; 6, positioning channel; 7, slot; 8, rotating plate; 9, engaging block; 10, rotating rod; 11, first positioning column; 12, second positioning column; 13, spring; 14, limiting block; 15, pressing block; 16, first bevel angle; 17, second bevel angle; 18, handle. Detailed Embodiment

[0022] The following further describes the specific implementation manners of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model, and cannot be used to limit the protection scope of the present utility model.

[0023] As Figures 1 - 4 shown, a graphite furnace atomic absorption spectrometer includes a spectrometer main body 1 and an automatic sampling device arranged on the spectrometer main body 1. The automatic sampling device includes: a rotating shaft 2 rotatably arranged on the spectrometer main body 1 through a rotating device, and a sample placement tray 3 detachably connected to the rotating shaft 2 through a quick-release device.

[0024] In order to facilitate the installation and disassembly of the sample placement tray 3, the quick-release device includes: a connecting column 4 penetrating through the middle of the sample injection tray, a positioning block 5 arranged on the rotating shaft 2, and a positioning channel 6 opened at the bottom of the connecting column 4 and matching the rotating shaft 2 and the positioning block 5.

[0025] In order to enhance the connection stability between the sample placement tray 3 and the rotating shaft 2, a clamping device is further arranged between the connecting column 4 and the positioning block 5 for enhancing the connection stability. The clamping device includes: a slot 7 opened on the connecting column 4 and corresponding to the positioning block 5, a rotating plate 8 rotatably arranged on the slot 7 through a rotating and resetting device for clamping with the positioning block 5, and a clamping block 9 arranged on the rotating plate 8 and matching the positioning block 5 and the positioning channel 6.

[0026] In order to facilitate releasing the clamped state and maintaining the clamped state, the rotating and resetting device includes: a rotating rod 10 fixedly arranged on the rotating plate 8 and located above the clamping block 9, the rotating rod 10 is rotatably connected to the slot 7, and a resetting device is further arranged between the rotating plate 8 and the positioning channel 6. The resetting device includes: a first positioning column 11 arranged on the rotating plate 8, a second positioning column 12 arranged in the positioning channel 6, and a spring 13 sleeved on the first positioning column 11 and the second positioning column 12. The two ends of the spring 13 are respectively fixedly connected to the first positioning column 11 and the second positioning column 12.

[0027] In order to prevent the rotating shaft 2 from affecting the operation of the resetting device, a plurality of limiting blocks 14 for limiting the rotating shaft 2 are further arranged in the positioning channel 6.

[0028] In order to facilitate pressing the rotating plate 8, a pressing block 15 for facilitating the user to press the rotating plate 8 is further arranged on the rotating plate 8.

[0029] In order to improve the smoothness during clamping, a first bevel angle 16 is opened on the clamping block 9, and a second bevel angle 17 matching the first bevel angle 16 is opened on the positioning block 5.

[0030] In order to facilitate lifting the sample placement tray 3, a handle 18 for facilitating lifting the sample placement tray 3 is further arranged at the end of the connecting column 4.

[0031] To facilitate the control of the rotation of the lofting plate 3, the rotation device includes: a rotation motor disposed within the spectrometer main body 1, a rotating rod of the rotation motor (not shown in the figure) passing through the spectrometer main body 1 and connected to a rotating shaft 2. The rotation motor is a servo motor and is electrically connected to the spectrometer main body 1.

[0032] Working principle: During use, place the sample to be measured on the lofting plate 3. It can be installed on the rotating shaft 2. During installation, align the positioning channel 6 with the positioning block 5 and directly insert the lofting plate 3 onto the rotating shaft 2. At this time, the engaging block 9 resists against the positioning block 5, and thus is pushed to avoid the space for the positioning block 5 to enter. When it is moved to a predetermined position, the spring 13 pushes the rotating plate 8 to reset and thus resist against the positioning block 5 to complete the engagement. At this time, the detection can begin. The user can load a new sample on another lofting plate 3. When the detection is completed, the user grasps the grip 18 and simultaneously presses the pressing block 15 to release the engagement and lift the lofting plate 3 of the detected sample.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and descriptions only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A graphite furnace atomic absorption spectrometer, comprising a spectrometer main body and an automatic sampling device arranged on the spectrometer main body, characterized in that: The automatic sampling device includes: a rotating shaft rotatably arranged on the spectrometer main body through a rotating device, and a sample placing tray detachably connected to the rotating shaft through a quick-release device.

2. The graphite furnace atomic absorption spectrometer according to claim 1, characterized in that: The quick-release device includes: a connecting column penetrating through the middle of the sampling tray, a positioning block arranged on the rotating shaft, and a positioning channel opened at the bottom of the connecting column to match the rotating shaft and the positioning block.

3. The graphite furnace atomic absorption spectrometer according to claim 2, wherein: A clamping device is further arranged between the connecting column and the positioning block to enhance the connection stability.

4. The graphite furnace atomic absorption spectrometer according to claim 3, characterized in that: The clamping device includes: a slot opened on the connecting column corresponding to the positioning block, a rotating plate rotatably arranged on the slot through a rotating and resetting device for clamping with the positioning block, and a clamping block arranged on the rotating plate and matching with the positioning block and the positioning channel.

5. The graphite furnace atomic absorption spectrometer according to claim 4, characterized in that: The rotating and resetting device includes: a rotating rod fixedly arranged on the rotating plate and located above the clamping block, the rotating rod is rotatably connected to the slot, and a resetting device is further arranged between the rotating plate and the positioning channel.

6. The graphite furnace atomic absorption spectrometer according to claim 5, wherein: The resetting device includes: a first positioning column arranged on the rotating plate, a second positioning column arranged in the positioning channel, a spring sleeved on the first positioning column and the second positioning column, and two ends of the spring are respectively fixedly connected to the first positioning column and the second positioning column.

7. A graphite furnace atomic absorption spectrometer according to claim 5, characterized in that: A plurality of limiting blocks for limiting the rotating shaft are further arranged in the positioning channel.

8. The graphite furnace atomic absorption spectrometer according to claim 5, characterized in that: A pressing block for facilitating the user to press the rotating plate is further arranged on the rotating plate.

9. The graphite furnace atomic absorption spectrometer according to claim 5, characterized in that: A first bevel angle is opened on the clamping block, and a second bevel angle matching the first bevel angle is opened on the positioning block.

10. A graphite furnace atomic absorption spectrometer according to claim 2, characterized in that: A handle for facilitating the user to hold the sample placing tray is further arranged at the end of the connecting column.

11. A graphite furnace atomic absorption spectrometer according to claim 1, characterized in that: The rotating device includes: a rotating motor arranged in the spectrometer main body, a rotating rod of the rotating motor penetrates through the spectrometer main body and is connected with the rotating shaft, and the rotating motor is electrically connected with the spectrometer main body.

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