Portable gas chromatography mass spectrometer

Abstract

The utility model relates to a portable gas chromatography mass spectrometer, which belongs to the technical field of mass spectrometers, and comprises a mass spectrometer main shell, an electric appliance element is mounted in the mass spectrometer main shell, an ion source part for conversion is further connected onto the mass spectrometer main shell, two sides of the mass spectrometer main shell are respectively provided with a side notch, a side baffle is arranged in each side notch, and the mass spectrometer main shell is provided with an ion source. The mass spectrometer comprises a mass spectrometer main shell, the rear side of the mass spectrometer main shell is provided with a side baffle, the rear side of the mass spectrometer main shell is provided with a rear notch, a rear baffle is arranged in the rear notch, the top of the side baffle and the top of the rear baffle are fixedly connected with a top cover plate, the top cover plate is used for sealing the top of the mass spectrometer main shell, and the top cover plate is connected with a positioning assembly used for positioning the top cover plate on the mass spectrometer main shell. A pair of limiting grooves are formed in the positions, close to the top cover plate, of the two sides of the mass spectrometer main shell, fixing of the top cover plate can be conveniently relieved through the positioning assembly, and then a user can conveniently maintain the interior of the mass spectrometer through the top cover plate, the side baffles and the rear baffle.

Description

Technical Field

[0001] This utility model relates to the field of mass spectrometry technology, and in particular to a portable gas chromatograph-mass spectrometer. Background Technology

[0002] Portable gas chromatography-mass spectrometry (GC-MS) is an analytical instrument that combines the separation capabilities of gas chromatography with the qualitative and quantitative capabilities of mass spectrometry. It is characterized by its small size, light weight, portability, and on-site operation, making it suitable for urgent monitoring and other applications. It can complete sample separation and analysis in a short time, improving work efficiency, and can detect compounds at extremely low concentrations, demonstrating strong analytical capabilities for trace substances.

[0003] The current application document with application number CN202410703697.2 discloses a portable gas chromatograph-mass spectrometer, including a gas chromatograph-mass spectrometer, which includes a base and a mass spectrometer body fixedly installed on its top, and also includes: a support assembly, a roller assembly, a slider assembly, and a lead screw assembly. The above solution, through the cooperation between the support feet, universal wheels, concave blocks, and second convex pillars, enables the device to easily switch between the support feet and universal wheels when stationary and in motion. Running the lead screw assembly moves the slider body, and causes the first convex pillar to slide in the first slide groove, causing the concave block to drive the second convex pillar to move towards each other. The second convex pillar will slide in the second slide groove. Then, another second convex pillar will move along the inclined section of the third slide groove and the fourth slide groove, thereby forcing the first side plate to drive the support feet to move upward and off the ground. At this time, the support feet and universal wheels are switched.

[0004] The above technical solution is convenient to use, but it is inconvenient to open the top and sides during maintenance, making it difficult to carry out maintenance work inside the mass spectrometer. Utility Model Content

[0005] To overcome the technical defects of the existing technology, this utility model provides a portable gas chromatograph-mass spectrometer, which can be easily released from the top cover plate by a positioning component, and then the user can install the top cover plate, side baffles and rear baffle, making internal maintenance of the mass spectrometer convenient.

[0006] The technical solution adopted by this utility model is as follows: it includes a main housing of a mass spectrometer, an electrical component is installed inside the main housing of the mass spectrometer, an ion source for conversion is also connected to the main housing of the mass spectrometer, side notches are respectively provided on both sides of the main housing of the mass spectrometer, a side baffle is provided in the side notch, a rear notch is provided on the rear side of the main housing of the mass spectrometer, a rear baffle is provided in the rear notch, a top cover plate is fixedly connected to the top of the side baffle and the top of the rear baffle, the top cover plate is used to close the top of the main housing of the mass spectrometer, and a positioning component for positioning the top cover plate on the main housing of the mass spectrometer is connected to the top cover plate.

[0007] Preferably, in order to facilitate the use of the limiting grooves, a pair of limiting grooves are provided on both sides of the main housing of the mass spectrometer and near the top cover plate.

[0008] Preferably, in order to connect the limiting plate to the top cover plate, the positioning component includes a limiting plate, the limiting plate being fixedly connected to both sides of the top of the top cover plate, the limiting plate being provided with a limiting groove, and one end of the limiting plate being open.

[0009] Preferably, in order to enable the bidirectional lead screw to cooperate with the sliding plate, the sliding plate is slidably engaged in the limiting groove, the sliding plate is provided with a threaded hole, the bidirectional lead screw is rotatably installed in the two limiting plates, and one end of the bidirectional lead screw is screwed into the threaded hole.

[0010] Preferably, in order to operate the rotating sleeve, a rotating sleeve is fitted on the outer wall of the bidirectional lead screw at the middle position, and the outer wall of the rotating sleeve is provided with anti-slip texture.

[0011] Preferably, in order to displace the L-shaped drive plate, an L-shaped drive plate is fixedly connected to the top of the sliding plate, one end of the L-shaped drive plate is located on one side of the main housing of the mass spectrometer, and a positioning plate is fixedly installed on one end of the L-shaped drive plate.

[0012] Preferably, in order to limit the positioning post, positioning posts are provided on both ends of the positioning plate, and the positioning posts are located in the limiting groove.

[0013] Preferably, in order to enable the support legs to play a supporting role, support legs for supporting the main body of the mass spectrometer are fixedly connected at the four corners of the bottom of the main body of the mass spectrometer.

[0014] The beneficial effects of this utility model are as follows: by providing a positioning component, a top cover plate, a side baffle plate, and a rear baffle plate, the top cover plate, side baffle plate, and rear baffle plate are integrated into one piece. The positioning component allows the top cover plate to be quickly connected to the main housing of the mass spectrometer. When it is necessary to repair the electrical components inside the main housing of the mass spectrometer, the positioning component can be used to easily release the top cover plate. After that, the user can easily repair the top cover plate, side baffle plate, and rear baffle plate, making the internal maintenance of the mass spectrometer convenient and highly practical. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the internal structure of the main housing of the mass spectrometer in this utility model.

[0017] Figure 3This is a schematic diagram of the connection structure of the side baffle, rear baffle and top cover plate in this utility model.

[0018] Figure 4 This is a schematic diagram of the positioning component in this utility model.

[0019] Figure 5 This is a schematic diagram showing the connection between the sliding plate and the L-shaped drive plate in this utility model.

[0020] Explanation of reference numerals in the attached figures: 1. Main housing of the mass spectrometer; 3. Ion source section; 4. Side baffle; 5. Rear baffle; 6. Top cover plate; 7. Positioning assembly; 701. Limiting plate; 702. Sliding plate; 703. Bidirectional lead screw; 704. Rotating sleeve; 705. L-shaped drive plate; 706. Positioning plate; 707. Positioning column; 8. Limiting groove; 9. Support leg. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] like Figures 1-5 As shown, this embodiment provides a portable gas chromatograph-mass spectrometer, including a main housing 1. Electrical components are installed inside the main housing 1. An ion source 3 for conversion is also connected to the main housing 1. Side notches are provided on both sides of the main housing 1, and side baffles 4 are provided in the side notches. A rear notch is provided on the rear side of the main housing 1, and a rear baffle 5 is provided in the rear notch. A top cover 6 is fixedly connected to the top of the side baffles 4 and the top of the rear baffle 5. The top cover 6 is used to close the top of the main housing 1. A positioning component 7 is connected to the top cover 6 to position the top cover 6 on the main housing 1. After the rear baffle 5, side baffles 4 and top cover 6 are installed, the main housing 1 can be closed, and the positioning component 7 can position the top cover 6.

[0023] A pair of limiting grooves 8 are provided on both sides of the main housing 1 of the mass spectrometer and near the top cover plate 6. The limiting grooves 8 can be used in conjunction with the positioning component 7 to improve the fixation effect.

[0024] The positioning component 7 includes limiting plates 701, which are fixedly connected to both sides of the top of the top cover plate 6. Each limiting plate 701 has a limiting groove 8, and one end of each limiting plate 701 is open. A sliding plate 702 is slidably engaged within the limiting groove 8. The sliding plate 702 has a threaded hole. A bidirectional lead screw 703 is rotatably mounted within both limiting plates 701, with one end of the bidirectional lead screw 703 screwed into the threaded hole. A rotating sleeve 704 is fitted onto the outer wall of the bidirectional lead screw 703 at its middle position. The sliding plate 702 is provided with anti-slip texture. An L-shaped drive plate 705 is fixedly connected to the top of the sliding plate 702. One end of the L-shaped drive plate 705 is located on one side of the main housing 1 of the mass spectrometer. A positioning plate 706 is fixedly installed on one end of the L-shaped drive plate 705. Positioning posts 707 are provided on both ends of the positioning plate 706, and the positioning posts 707 are located in the limiting groove 8. The limiting groove 8 on the limiting plate 701 can limit the sliding plate 702. Therefore, when the bidirectional lead screw 703 rotates, the bidirectional lead screw 703 can make the sliding plate 702 slide in the limiting groove 8.

[0025] The main body 1 of the mass spectrometer is fixedly connected to four corners of the bottom of the main body 1 of the mass spectrometer, and is supported by support legs 9.

[0026] In use, the portable gas chromatograph-mass spectrometer of this invention is operated as follows: First, the various compounds in a mixed sample are separated using a gas chromatographic column. The sample enters the column under the influence of a carrier gas. Due to the different partition coefficients of different compounds between the stationary and mobile phases, they move at different speeds within the column, achieving separation. Then, the separated compounds sequentially enter the mass spectrometer. In the mass spectrometer, the compounds are ionized, forming ions with various mass-to-charge ratios. These ions are separated and detected by a mass analyzer. Mass spectra are obtained based on their mass-to-charge ratios and relative abundances. Qualitative and quantitative analysis of the compounds is performed by comparing them with a standard spectral library or other methods. When installing the top cover 6, side baffles 4, and rear baffle 5, since they are integrated, the user can easily install them. Baffle 4 and rear baffle 5 are respectively inserted into the side notches and rear notches on both sides of the main housing 1 of the mass spectrometer. After insertion, the top cover 6 can be located on the top of the main housing 1 of the mass spectrometer. Then, the user can rotate the bidirectional lead screw 703 in place by rotating the sleeve 704, thereby driving the sliding plate 702 to move within the limiting plate 701. In turn, the sliding plate 702 can drive the L-shaped drive plate 705 and the positioning plate 706 to move until the positioning plate 706 is clamped on both sides of the main housing 1 of the mass spectrometer. At the same time, when the positioning plate 706 is clamped on both sides, the positioning post 707 also needs to be inserted into the limiting grooves 8 on both sides of the main housing 1 of the mass spectrometer. When the main housing 1 of the mass spectrometer is under maintenance, the fixing of the top cover 6 can be easily released by the positioning component 7. After that, the user can remove the top cover 6, side baffle 4 and rear baffle 5, making the internal maintenance of the mass spectrometer convenient and highly practical.

[0027] The foregoing has shown and described the basic principles and main features of this invention, as well as its advantages. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope. All such changes and modifications fall within the scope of this invention as defined by the appended claims and their equivalents.

Claims

1. A portable gas chromatograph mass spectrometer, comprising a mass spectrometer main housing, electrical components are installed in the mass spectrometer main housing (1), and an ion source part (3) for conversion is further connected on the mass spectrometer main housing (1), characterized in that: The two sides of the mass spectrometer main shell (1) are respectively provided with side notches, the side notches are provided with side baffles (4), the rear side of the mass spectrometer main shell (1) is provided with a rear notch, the rear notch is provided with a rear baffle (5), the top of the side baffle (4) and the top of the rear baffle (5) are fixedly connected with a top cover plate (6), the top cover plate (6) is used for closing the top of the mass spectrometer main shell (1), and the top cover plate (6) is connected with a positioning assembly (7) for positioning the top cover plate (6) on the mass spectrometer main shell (1).

2. The portable gas chromatograph mass spectrometer of claim 1, wherein: The two sides of the mass spectrometer main shell (1) are respectively provided with side notches, the side notches are provided with side baffles (4), the rear side of the mass spectrometer main shell (1) is provided with a rear notch, the rear notch is provided with a rear baffle (5), the top of the side baffle (4) and the top of the rear baffle (5) are fixedly connected with a top cover plate (6), the top cover plate (6) is used for closing the top of the mass spectrometer main shell (1), and the top cover plate (6) is connected with a positioning assembly (7) for positioning the top cover plate (6) on the mass spectrometer main shell (1).

3. The portable gas chromatograph mass spectrometer of claim 2, wherein: The positioning assembly (7) comprises a limiting plate (701), the limiting plate (701) is fixedly connected on the two sides of the top of the top cover plate (6), the limiting plate (701) is provided with a limiting groove (8), and one end of the limiting plate (701) is of an open type.

4. The portable gas chromatograph mass spectrometer of claim 3, wherein: The limiting groove (8) is slidably connected with a sliding plate (702), the sliding plate (702) is provided with a threaded hole, and the two limiting plates (701) are rotatably connected with a bidirectional screw rod (703), and one end of the bidirectional screw rod (703) is screwed in the threaded hole.

5. The portable gas chromatograph mass spectrometer of claim 4, wherein: The outer side wall of the middle part of the bidirectional screw rod (703) is provided with a rotating sleeve (704), and the outer side wall of the rotating sleeve (704) is provided with an anti-skid line.

6. The portable gas chromatograph mass spectrometer of claim 5, wherein: The top of the sliding plate (702) is fixedly connected with an L-shaped driving plate (705), one end of the L-shaped driving plate (705) is located on one side of the mass spectrometer main shell (1), and one end of the L-shaped driving plate (705) is fixedly connected with a positioning plate (706).

7. The portable gas chromatograph mass spectrometer of claim 6, wherein: The two ends of the positioning plate (706) are provided with positioning columns (707), and the positioning columns (707) are located in the limiting groove (8).

8. The portable gas chromatograph mass spectrometer of claim 1, wherein: The bottom of the mass spectrometer main shell (1) is fixedly connected with supporting legs (9) for supporting the mass spectrometer main shell (1).

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