Gas chromatograph-mass spectrometer

Abstract

The utility model discloses a gas chromatograph-mass spectrometer, which comprises a mass spectrometer body and a sample introduction disc, the mass spectrometer body is provided with a sliding plate, the sliding plate is provided with a taking and placing mechanism used for taking and placing samples from the sample introduction disc, the taking and placing mechanism comprises two mounting frames fixedly connected to the sliding plate, and the mounting frames are fixedly connected to the sliding plate. A conveying belt is arranged in the mounting frame, first electric sliding rails are mounted on the two side walls of the mounting frame through mounting rods, first sliding blocks are arranged below the first electric sliding rails, and first electric push rods are arranged at the lower ends of the first sliding blocks. According to the utility model, the pick-and-place mechanism is arranged, so that the test tubes to be tested can be automatically placed, the tested test tubes can be automatically taken, and the test tubes can be automatically input and output, so that the automation degree of the device is improved, and meanwhile, the detection efficiency of a large number of test tubes is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas chromatography - mass spectrometry (GC - MS), and particularly relates to a gas chromatography - mass spectrometry instrument. Background Technique

[0002] The gas chromatography - mass spectrometry (GC - MS) has extensive and important applications in the field of environmental detection. It can be used for detecting organic pollutants, analyzing volatile organic compounds (VOCs), determining petroleum hydrocarbon compounds, and detecting environmental hormones, providing accurate and reliable analysis means for environmental detection, and being of great significance for protecting the environment and ensuring public health.

[0003] The gas chromatography - mass spectrometry instrument includes a vacuum system, a sampling system, an ion source, a mass analyzer, a detector, and a workstation for collecting data and controlling the instrument. The sampling system includes a sampler and a sampling tray located below the sampler. A large number of test tubes are placed on the sampling tray. After all the test tubes are tested, the sampling tray needs to be removed and replaced with other test tubes. Since it takes a lot of time to remove a large number of test tubes from the sampling tray and put a large number of test tubes on it, for a large number of comparative detections, the experimental time is long and the efficiency is reduced. Therefore, it is necessary to design a gas chromatography - mass spectrometry instrument to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art and propose a gas chromatography - mass spectrometry instrument.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A gas chromatography - mass spectrometry instrument includes a mass spectrometer body and a sampling tray. A sliding plate is provided on the mass spectrometer body, and a picking - placing mechanism for picking and placing samples from the sampling tray is provided on the sliding plate. The picking - placing mechanism includes two mounting frames fixedly connected to the sliding plate. A conveyor belt is provided in the mounting frame. First electric slide rails are installed on both side walls of the mounting frame through mounting rods. A first slider is provided under the first electric slide rail, and a first electric push rod is provided at the lower end of the first slider. The output end of the first electric push rod is installed with a pneumatic finger through a connecting rod. A motor is provided on the side wall of the mounting frame, and a positioning mechanism for positioning test tubes is provided on one of the mounting frames.

[0007] Preferably, the positioning mechanism includes a fixed frame fixedly connected to the side wall of the mounting frame. A second electric push rod is provided at the top inside the fixed frame, and a stop block is provided at the output end of the second electric push rod.

[0008] Preferably, an installation frame is fixedly connected to the side wall of the mass spectrometer body, and the sliding plate is slidably connected to the mass spectrometer body.

[0009] Preferably, a second electric slide rail is fixedly connected to the upper end of the mounting frame, a second electric slide rail is provided with a second slider, and a side wall of the second slider is fixedly connected to the sliding plate via a connecting plate.

[0010] Preferably, two limit plates are fixedly connected to the upper end of the installation frame, and the cross-section of the inner circle of the installation frame is an inverted convex shape.

[0011] Preferably, the cross section of the connecting rod is L-shaped, and the two pneumatic fingers are symmetrically distributed relative to the center of the sample injection plate.

[0012] The utility model has the following beneficial effects:

[0013] 1. The device is provided with a pick-and-place mechanism, which can automatically place the test tube to be tested and automatically take out the tested test tube through the cooperation of the first electric slide rail, the first electric push rod and the pneumatic finger on the mounting frame, and can automatically input and output, thereby improving the automation degree of the device and the efficiency of large-scale test tube detection;

[0014] 2. The device is equipped with a positioning mechanism. The block falls at a certain time interval, and the test tubes can be transported to the sample tray at a certain interval, so that the loading of the test tubes is more orderly, and there is no need to manually control the test tube interval, thereby improving the practicality of the device;

[0015] 3. The device is provided with a second electric slide rail, etc., so that the pick-and-place mechanism can be moved out of the mass spectrometer body when not in use, and no manual movement is required, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a gas chromatography-mass spectrometer proposed by the utility model;

[0017] Figure 2 for Figure 1 A magnified view of the structure at A;

[0018] Figure 3 The utility model is a side view of a gas chromatography-mass spectrometer.

[0019] In the figure: 1 mass spectrometer body, 2 sample tray, 3 pneumatic finger, 4 first electric push rod, 5 first electric slide rail, 6 sliding plate, 7 mounting frame, 8 second electric push rod, 9 stopper, 10 limit plate, 11 mounting frame, 12 conveyor belt, 13 motor, 14 fixing frame, 15 connecting plate, 16 second electric slide rail. DETAILED DESCRIPTION

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0021] Referring to Figures 1-3 , a gas chromatography-mass spectrometry instrument includes a mass spectrometer body 1 and a sample injection tray 2. A sliding plate 6 is provided on the mass spectrometer body 1, and a picking and placing mechanism for picking and placing samples from the sample injection tray 2 is provided on the sliding plate 6. The picking and placing mechanism includes two mounting frames 11 fixedly connected to the sliding plate 6. A conveyor belt 12 is provided inside the mounting frame 11. First electric slide rails 5 are installed on both side walls of the mounting frame 11 through mounting rods. A first slider is provided under the first electric slide rail 5, and a first electric push rod 4 is provided at the lower end of the first slider. The output end of the first electric push rod 4 is installed with a pneumatic finger 3 through a connecting rod. The model of the pneumatic finger 3 can be HFR-10 / 16 / 20 / 25 / 32-N, and a motor 13 is provided on the side wall of the mounting frame 11.

[0022] A positioning mechanism for positioning test tubes is provided on one of the mounting frames 11. The positioning mechanism includes a fixed frame 14 fixedly connected to the side wall of the mounting frame 11. A second electric push rod 8 is provided at the inner top of the fixed frame 14, and a stopper 9 is provided at the output end of the second electric push rod 8.

[0023] In the present utility model, an installation frame 7 is fixedly connected to the side wall of the mass spectrometer body 1, and the sliding plate 6 is slidably connected to the mass spectrometer body 1, so that the picking and placing mechanism can be moved out of the mass spectrometer body 1 when not in use and there is a special placement area.

[0024] In the present utility model, a second electric slide rail 16 is fixedly connected to the upper end of the installation frame 7. A second slider is provided on the second electric slide rail 16, and the side wall of the second slider is fixedly connected to the sliding plate 6 through a connecting plate 15. The setting of the second electric slide rail 16 can eliminate the need for manual translation of the sliding plate 6, thereby improving the automation degree of the device.

[0025] In the present utility model, two limiting plates 10 are fixedly connected to the upper end of the mounting frame 11, which can prevent the test tubes from tipping over when moving on the conveyor belt 12. The inner cross-section of the mounting frame 11 is an inverted convex shape, which can position the placement of the test tubes.

[0026] In the present utility model, the cross-section of the connecting rod is L-shaped, and the two pneumatic fingers 3 are symmetrically distributed with respect to the center of the sample injection tray 2, so that the two pneumatic fingers 3 clamp the test tubes vertically above the mounting frame 11, eliminating the need to directly place the pneumatic fingers 3 above the mounting frame 11, thereby reducing the space occupied by the pneumatic fingers 3 on the mounting frame 11 and enabling the conveyor belt 12 to place more test tubes.

[0027] In the initial state, the output end of the first electric push rod 4 retracts.

[0028] Place test tubes with samples on the front conveyor belt 12 at certain intervals. Start the motor 13. The conveyor belt 12 moves the test tubes towards the sampling tray 2. The first electric slide rail 5 is started, causing the pneumatic finger 3 to move above the test tube on the left side of the conveyor belt 12. The first electric push rod 4 is started, and the fingers of the pneumatic finger 3 move to both sides of the test tube. After the pneumatic finger 3 clamps the test tube, the output end of the first electric push rod 4 contracts. The first electric slide rail 5 is started to move the clamped test tube to the sampling tray 2. The output end of the first electric push rod 4 extends and retracts, and during this period, the test tube is placed into the sampling tray 2. The pneumatic finger 3 resets and waits for the next feeding;

[0029] When the sampling of the sampling tray 2 is completed, it will rotate. When the test tube with completed sampling rotates to the front of the rear mounting frame 11, the first electric slide rail 5 is started, causing the pneumatic finger 3 to move above the test tube on the sampling tray 2. The first electric push rod 4 extends and retracts, and during this period, the pneumatic finger 3 clamps the test tube. The first electric slide rail 5 is started to move the clamped test tube to the conveyor belt 12. The pneumatic finger 3 resets and waits for the next discharging. The conveyor belt 12 outputs the test tube with completed sampling to the right. During the process, continuous and uninterrupted automatic loading and unloading of test tubes can be achieved, thereby improving the efficiency of large-batch detection;

[0030] For the placement of the test tubes to be sampled, they can be first placed on the conveyor belt 12. When they are blocked by the stopper 9, they stop moving forward. The output end of the second electric push rod 8 contracts, and the test tubes continue to move forward. The stopper 9 drops at certain time intervals, and then the test tubes are placed on the conveyor belt 12 again. Thus, the feeding of the test tubes is more orderly, and there is no need for manual control of the test tube spacing, thereby improving the practicability of the device.

[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and practical concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A gas chromatography-mass spectrometer, comprising a mass spectrometer body (1) and a sample injection plate (2), characterized in that: The mass spectrometer body (1) is provided with a sliding plate (6), and the sliding plate (6) is provided with a pick-up and placement mechanism for taking and placing samples from a sample injection tray (2). The pick-up and placement mechanism comprises two mounting frames (11) fixedly connected to the sliding plate (6), and a conveyor belt (12) is provided in the mounting frame (11). The two side walls of the mounting frame (11) are provided with first electric slide rails (5) through mounting rods, and a first slider is provided under the first electric slide rail (5). A first electric push rod (4) is provided at the lower end of the first slider, and a pneumatic finger (3) is installed at the output end of the first electric push rod (4) through a connecting rod. A motor (13) is provided on the side wall of the mounting frame (11), and a positioning mechanism for positioning a test tube is provided on one of the mounting frames (11).

2. A gas chromatography-mass spectrometry instrument according to claim 1, characterized in that: The positioning mechanism comprises a fixing frame (14) fixedly connected to the side wall of the installation frame (11), a second electric push rod (8) is provided at the top of the fixing frame (14), and a stopper (9) is provided at the output end of the second electric push rod (8).

3. A gas chromatography-mass spectrometry instrument according to claim 2, characterized in that: A mounting frame (7) is fixedly connected to the side wall of the mass spectrometer body (1), and the sliding plate (6) is slidably connected to the mass spectrometer body (1).

4. A gas chromatography-mass spectrometry instrument according to claim 3, characterized in that: The upper end of the mounting frame (7) is fixedly connected to a second electric slide rail (16), the second electric slide rail (16) is provided with a second slide block, and the side wall of the second slide block is fixedly connected to the slide plate (6) via a connecting plate (15).

5. A gas chromatography-mass spectrometry instrument according to claim 4, characterized in that: Two limiting plates (10) are fixedly connected to the upper end of the installation frame (11), and the inner circle cross section of the installation frame (11) is an inverted convex shape.

6. A gas chromatography-mass spectrometry instrument according to claim 5, characterized in that: The cross section of the connecting rod is L-shaped, and the two pneumatic fingers (3) are symmetrically distributed relative to the center of the sample injection plate (2).

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