A gas chromatograph mass spectrometer

Abstract

The utility model provides a kind of gas chromatography mass spectrometer, the gas chromatography mass spectrometer, including base, the top of the base is symmetrically equipped with two groups of installation rail.The utility model is equipped with mounting plate in the top of base, test tube rack for storing test tube is installed in the top of mounting plate by the connecting mode of simple fixing peg, and the process of storing test tube into test tube rack is also very simple and convenient, compared with comparative case, the device is more simple and efficient to operate, and the bottom of mounting plate is equipped with pneumatic cylinder, pneumatic cylinder is arranged in the bottom left side of base, mounting plate can be driven to lift by pneumatic cylinder, to realize the lifting of test tube in test tube rack, cooperate motor drive sampler rotation, so that sampling needle can carry out continuous sampling operation on a circle of test tube on a group of test tube racks, compared with comparative case, the sampler of the device does not need to design lifting structure, and the internal structure of sampler is more simple and stable.

Description

Technical Field

[0001] This utility model belongs to the field of chemical analysis technology, and in particular relates to a gas chromatography-mass spectrometry instrument. Background Technology

[0002] Chemical analysis is a scientific method based on the chemical reactions of substances, using specific experimental techniques to determine the chemical composition, content, and structure of substances. As a core branch of analytical chemistry, its core tasks include qualitative and quantitative analysis. Gas chromatography-mass spectrometry (GC-MS) is required in chemical analysis. This is a cutting-edge analytical instrument that combines the high-efficiency separation capabilities of gas chromatography with the high-sensitivity qualitative analysis capabilities of mass spectrometry. Its core working principle involves separating compounds in complex samples into single components based on retention time using a capillary column in gas chromatography, and then transmitting these components to the mass spectrometer via an interface. In the mass spectrometry section, the compounds are ionized under the action of an electron impact ionization source. The generated ions are separated in the mass analyzer according to their mass-to-charge ratio, and finally, a mass spectrum is generated by the detector. With the help of NIST spectral library search and quantitative analysis software, the structure of unknown substances can be accurately identified and the content determined.

[0003] The existing authorized public account CN211478178U discloses a sample introduction system for a gas chromatography-mass spectrometry (GC-MS) instrument, relating to the technical field of GC-MS instruments. It includes a base, on which are mounted an injector, a sample tray, and a sample storage rack. Sample vials are fitted with caps, and the sample storage rack has connecting components. The connecting components include multiple mounting rings and connecting rods. The mounting rings are placed on the sample storage rack, and the connecting rods include a first connecting rod and a second connecting rod, which are hinged together. The first and second connecting rods are respectively connected to two adjacent mounting rings. After being removed from the sample storage rack, the mounting rings and sample vials mounted within them surround the side wall of the sample tray. The side wall of the sample tray has a limiting component that fixes the mounting rings and sample vials to the sample tray. This invention facilitates the replacement and testing of a large number of samples by laboratory personnel, reducing their workload. However, the sample injection system of the aforementioned gas chromatography-mass spectrometry instrument requires the sample vials to be removed from the mounting ring and then inserted into the sample injection tray during installation, which is too cumbersome. Furthermore, the sample injection tray of this device cannot be raised or lowered, and continuous sampling of a ring of sample vials can only be achieved by raising and lowering the injector, which increases the structural complexity of the injector. Therefore, it is necessary to provide a gas chromatography-mass spectrometry instrument to solve the above problems. Utility Model Content

[0004] The technical content of this utility model is to provide a gas chromatography-mass spectrometry instrument.

[0005] To address the aforementioned problems, this utility model provides a gas chromatography-mass spectrometry (GC-MS) instrument, comprising a base, two sets of mounting rails symmetrically mounted on the top of the base, a mounting frame mounted on the top of the mounting rails, a fixing block mounted on the side of the mounting rails, a motor mounted on the top of the mounting frame, an injector connected to the bottom of the motor via a rotating shaft, a mounting block mounted on the top of the injector, a sampling needle mounted on the bottom of the injector, two sets of mounting plates symmetrically mounted on the top of the base, a cylinder and a limiting rod connected to the bottom of the mounting plates, and a test tube rack mounted on the top of the mounting plates, with test tubes placed in the test tube rack.

[0006] As a further solution of this utility model, the mounting bracket is configured as a U-shaped structure, and mounting grooves adapted to the mounting rails are provided on both sides of the bottom of the mounting bracket. The mounting rails are configured as T-shaped structures, with the left side of the mounting rails being a closed structure and the right side of the mounting rails being flush with the right side of the mounting bracket. The mounting grooves are configured as T-shaped structures adapted to the mounting rails, thereby preventing the mounting bracket from detaching upward from the two sets of mounting rails.

[0007] As a further solution of this utility model, the length and width of the fixing block are the same as the length and width of the mounting rail, and the fixing block is fixedly installed on the right side of the mounting rail by two sets of fixing bolts, thereby making the right side of the mounting rail a closed structure.

[0008] As a further solution of this utility model, the motor is fixedly installed on both sides of the top of the mounting frame. Two sets of motors are symmetrically installed on the top of the mounting frame. The bottom shaft of the motor passes through the through hole opened on the mounting frame. The bottom of the shaft is flush with the top of the inner side of the mounting frame. The shaft is fixedly connected to the top of the injector. Thus, the motor can drive the shaft to rotate the injector.

[0009] As a further solution of this utility model, the mounting block is installed in a rotating groove opened on the inner top of the mounting frame. The mounting block is configured as a circular structure, the mounting block is configured as a T-shaped structure, the mounting block and the rotating groove are rotatably connected, the mounting block and the mounting frame are rotatably connected, the mounting block is fixedly installed on the top of the injector, the injector and the mounting frame are rotatably connected, a through hole is opened in the middle of the mounting block, the inner diameter of the through hole is the same as the diameter of the rotating shaft, the lower end of the rotating shaft is in the through hole, the rotating shaft and the mounting block are not fixedly connected, the sampling needle is installed at the bottom eccentric position of the injector, and the mounting frame is configured as a left and right part structure and connected by four sets of fixing bolts, thereby facilitating the installation of the mounting block into the rotating groove.

[0010] As a further solution of this utility model, the mounting plate is not fixedly connected to the top of the base. The cylinder is fixedly installed on the bottom left side of the base. The top telescopic end of the cylinder passes through the through hole opened on the left side of the base. The top of the top telescopic end of the cylinder is fixedly connected to the center of the bottom of the mounting plate. Four sets of limiting rods are symmetrically installed on the bottom of the mounting plate. The limiting rods are installed in the through hole opened on the left side of the base. The bottom of the limiting rods is flush with the bottom of the cylinder. The stability of the mounting plate can be ensured by the limiting rods.

[0011] As a further solution of this utility model, the test tube rack is configured as a can-shaped structure, with the top and bottom of the test tube rack being closed structures. The bottom of the test tube rack is fixedly connected to the top of the mounting plate by fixing bolts. The top of the test tube rack has eight sets of through holes, which form a ring structure. The outer diameter of the test tube is the same as the inner diameter of the through holes. The bottom inner side of the test tube rack has eight sets of grooves corresponding to the eight sets of through holes. The inner dimensions of the grooves are adapted to the bottom dimensions of the test tubes, thereby allowing the test tubes to be stably placed in the test tube rack.

[0012] Compared with related technologies, the gas chromatography-mass spectrometry instrument provided by this utility model has the following beneficial effects: 1. This utility model features an installation plate mounted on the top of the base. A test tube rack containing test tubes is installed on the top of the installation plate using simple fixing bolts. The process of storing test tubes inside the test tube rack is also very simple and convenient. Compared to the comparative cases, this device is simpler and more efficient to operate. A cylinder is installed at the bottom of the installation plate, located on the left side of the bottom of the base. The cylinder can drive the installation plate to rise and fall, thereby raising and lowering the test tubes in the test tube rack. Combined with the motor-driven sampler rotation, the sampler can continuously sample a ring of test tubes on a set of test tube racks. Compared to the comparative cases, the sampler in this device does not require a lifting structure, and its internal structure is simpler and more stable.

[0013] 2. This utility model features an installation block mounted on top of the injector. The installation block is T-shaped and installed in a T-shaped groove at the bottom of the mounting frame, thereby ensuring the injector remains stable at the bottom of the mounting frame. A through hole is provided in the middle of the installation block to match the bottom shaft of the motor, allowing the shaft to be properly connected and fixed to the injector without affecting the motor's drive to rotate the injector. The mounting frame is designed with two parts, left and right, to facilitate the installation of the installation block in the groove. Attached Figure Description

[0014] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1This is a top-view three-dimensional structural diagram of a gas chromatography-mass spectrometry instrument according to the present invention. Figure 2 This is a bottom-view three-dimensional structural diagram of a gas chromatography-mass spectrometry instrument according to the present invention. Figure 3 This is a side view of the mounting bracket structure of a gas chromatography-mass spectrometry instrument according to the present invention; Figure 4 This is a schematic diagram of the inner structure of the mounting bracket of a gas chromatography-mass spectrometry instrument according to the present invention; Figure 5 This is a schematic diagram of the inner structure of the mounting block of a gas chromatography-mass spectrometry instrument according to the present invention; Figure 6 This is a side view of the mounting plate structure of a gas chromatography-mass spectrometry instrument according to the present invention; Figure 7 This is a cross-sectional view of the test tube rack of a gas chromatography-mass spectrometry instrument according to the present invention.

[0016] In the diagram: 1. Base; 2. Mounting rail; 3. Mounting bracket; 4. Fixing block; 5. Motor; 6. Injector; 7. Mounting block; 8. Sampling needle; 9. Mounting plate; 10. Cylinder; 11. Limiting rod; 12. Test tube rack; 13. Test tube. Detailed Implementation

[0017] Please refer to the following: Figure 1-7 A gas chromatography-mass spectrometry (GC-MS) instrument includes a base 1. Two sets of mounting rails 2 are symmetrically mounted on the top of the base 1. A mounting frame 3 is mounted on the top of the mounting rails 2. Fixing blocks 4 are mounted on the sides of the mounting rails 2. A motor 5 is mounted on the top of the mounting frame 3. An injector 6 is connected to the bottom of the motor 5 via a rotating shaft. A mounting block 7 is mounted on the top of the injector 6. A sampling needle 8 is mounted on the bottom of the injector 6. Two sets of mounting plates 9 are symmetrically mounted on the top of the base 1. A cylinder 10 and a limiting rod 11 are connected to the bottom of the mounting plates 9. A test tube rack 12 is mounted on the top of the mounting plates 9, and test tubes 13 are placed in the test tube rack 12.

[0018] Preferably, the mounting bracket 3 is configured as a U-shaped structure, and mounting grooves adapted to the mounting rail 2 are provided on both sides of the bottom of the mounting bracket 3. The mounting rail 2 is configured as a T-shaped structure, and the left side of the mounting rail 2 is configured as a closed structure. By aligning the mounting groove with the mounting rail 2, the mounting bracket 3 can be slidably installed on the top left side of the base 1, so that the two sets of mounting rails 2 enter the two sets of mounting grooves on both sides of the bottom of the mounting bracket 3. The right side of the mounting rail 2 is flush with the right side of the mounting bracket 3. The mounting groove is configured as a T-shaped structure adapted to the mounting rail 2, so that the mounting bracket 3 cannot detach upward from the two sets of mounting rails 2. Preferably, the length and width of the fixing block 4 are the same as the length and width of the mounting rail 2. The fixing block 4 is fixedly installed on the right side of the mounting rail 2 by two sets of fixing bolts, so that the right side of the mounting rail 2 is synchronized with the left side of the mounting rail 2 and both are set as closed structures, so that the mounting frame 3 cannot be separated from the mounting rail 2 to the right, and thus the mounting frame 3 is fixedly installed on the top left side of the base 1. Preferably, the motor 5 is fixedly installed on both sides of the top of the mounting frame 3. Two sets of motors 5 are symmetrically installed on the top of the mounting frame 3. The bottom shaft of the motor 5 passes through the through hole opened on the mounting frame 3. The bottom of the shaft is flush with the top of the inner side of the mounting frame 3. The shaft is fixedly connected to the top of the injector 6, so that the motor 5 can drive the shaft to rotate the injector 6. Preferably, the mounting block 7 is installed in a rotating groove on the inner top of the mounting frame 3. The mounting block 7 is circular or T-shaped, thus forming a rotatable connection between the mounting block 7 and the rotating groove, and a rotatable connection between the mounting block 7 and the mounting frame 3. The mounting block 7 is fixedly installed on the top of the injector 6, thus forming a rotatable connection between the injector 6 and the mounting frame 3. A through hole is provided in the middle of the mounting block 7, the inner diameter of which is the same as the diameter of the rotating shaft. The lower end of the rotating shaft is located in the through hole. The rotating shaft and the mounting block 7 are not fixedly connected. During the rotation of the injector 6 driven by the motor 5, the mounting block 7 rotates synchronously in the rotating groove. The T-shaped structure of the mounting block 7 ensures that the injector 6 is positioned at the bottom of the mounting frame 3. To ensure the stability of the part and prevent the injector 6 from shaking, and to ensure the stability of the connection between the rotating shaft and the injector 6, the sampling needle 8 is installed at the bottom eccentric position of the injector 6. During the rotation of the injector 6, the sampling needle 8 performs a circular motion. The mounting frame 3 is set as a left and right part structure and is connected by four sets of fixing bolts, so as to facilitate the installation of the mounting block 7 into the rotating groove. The four sets of fixing bolts and two sets of mounting rails 2 can ensure the firmness of the connection between the two parts of the mounting frame 3. During installation, the mounting block 7 needs to be installed into the rotating groove first, and then the motor 5 needs to be installed on the top of the mounting frame 3 so that the rotating shaft enters the middle through hole of the mounting block 7. Then the injector 6 is fixedly installed on the bottom of the rotating shaft and the mounting block 7. Preferably, the mounting plate 9 is not fixedly connected to the top of the base 1. The cylinder 10 is fixedly installed on the bottom left side of the base 1. The top telescopic end of the cylinder 10 passes through the through hole opened on the left side of the base 1. The top of the top telescopic end of the cylinder 10 is fixedly connected to the bottom center of the mounting plate 9. The mounting plate 9 can be driven to rise and fall by the cylinder 10. Four sets of limit rods 11 are symmetrically installed on the bottom of the mounting plate 9. The limit rods 11 are installed in the through hole opened on the left side of the base 1. The bottom of the limit rods 11 is flush with the bottom of the cylinder 10. During the process of the cylinder 10 driving the mounting plate 9 to rise and fall, the four sets of limit rods 11 move synchronously along the left through hole of the base 1, thereby ensuring the stability of the mounting plate 9 and preventing the mounting plate 9 from shaking. Preferably, the test tube rack 12 is configured as a can-shaped structure, with its top and bottom being closed. The bottom of the test tube rack 12 is fixedly connected to the top of the mounting plate 9 via fixing bolts. The top of the test tube rack 12 has eight sets of through holes arranged in a ring. The outer diameter of the test tube 13 is the same as the inner diameter of the through holes. The bottom inner side of the test tube rack 12 has eight sets of grooves corresponding to the eight sets of through holes. The inner dimensions of the grooves are adapted to the bottom dimensions of the test tube 13, thus allowing the test tube 13 to be stably placed in the test tube rack 12. When sampling the internal sample of the test tube 13, the test tube 13 is inserted into the test tube rack 12, and then the test tube rack 12 is installed on the top of the mounting plate 9, so that the top of the test tube 13 is directly opposite the bottom of the sampling needle 8. The sampling needle 8 moves in a circular motion under the drive of the motor 5, with the center of the circle aligned with the top circle of the test tube rack 12. With the needles aligned vertically, the mounting plate 9 can be raised by the cylinder 10, allowing the sampling needle 8 to enter the test tube 13. The sampler 6 then controls the sampling needle 8 to sample the test tube 13. After sampling of one set of test tubes 13, the mounting plate 9 is lowered by the cylinder 10, and the sampler 6 is rotated by the motor 5, aligning the sampling needle 8 with the top of another set of test tubes 13. The mounting plate 9 is then raised by the cylinder 10. Through the cooperation of the motor 5 and the cylinder 10, continuous sampling of eight sets of test tubes 13 on the test tube rack 12 can be performed. This device improves sample detection efficiency by symmetrically installing two sets of mounting plates 9 on the top of the base 1 and symmetrically installing two sets of samplers 6 on the inner top of the mounting rack 3, allowing for sampling of two sets of test tubes 13.

[0019] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming. All standard parts used can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The fixing bolt of this device is a bolt, and the fixing hole is a screw hole. The machinery, parts and equipment all adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments, or they can be used directly or indirectly, without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the appended claims and their equivalents, and they are similarly included within the patent protection scope of the present invention.

Claims

1. A gas chromatography-mass spectrometry (GC-MS) instrument, comprising a base (1), wherein two sets of mounting rails (2) are symmetrically mounted on the top of the base (1), and a mounting frame (3) is mounted on the top of the mounting rails (2), characterized in that: A fixing block (4) is installed on the side of the mounting rail (2), a motor (5) is installed on the top of the mounting frame (3), and a sampler (6) is connected to the bottom of the motor (5) via a rotating shaft. A mounting block (7) is installed on the top of the sampler (6), and a sampling needle (8) is installed on the bottom of the sampler (6). Two sets of mounting plates (9) are symmetrically installed on the top of the base (1). A cylinder (10) and a limiting rod (11) are connected to the bottom of the mounting plate (9). A test tube rack (12) is installed on the top of the mounting plate (9), and test tubes (13) are placed in the test tube rack (12).

2. The gas chromatography-mass spectrometry (GC-MS) instrument according to claim 1, characterized in that: The mounting bracket (3) is configured as a U-shaped structure. The bottom sides of the mounting bracket (3) are provided with mounting grooves that are compatible with the mounting rail (2). The mounting rail (2) is configured as a T-shaped structure. The left side of the mounting rail (2) is configured as a closed structure. The right side of the mounting rail (2) is flush with the right side of the mounting bracket (3). The mounting groove is configured as a T-shaped structure that is compatible with the mounting rail (2).

3. The gas chromatography-mass spectrometry (GC-MS) instrument according to claim 1, characterized in that: The length and width of the fixing block (4) are the same as the length and width of the mounting rail (2), and the fixing block (4) is fixedly installed on the right side of the mounting rail (2) by two sets of fixing bolts.

4. The gas chromatography-mass spectrometry (GC-MS) instrument according to claim 1, characterized in that: The motor (5) is fixedly installed on both sides of the top of the mounting frame (3). Two sets of motors (5) are symmetrically installed on the top of the mounting frame (3). The bottom shaft of the motor (5) passes through the through hole opened on the mounting frame (3). The bottom of the shaft is flush with the top of the inner side of the mounting frame (3). The shaft is fixedly connected to the top of the injector (6).

5. A gas chromatography-mass spectrometry (GC-MS) instrument according to claim 1, characterized in that: The mounting block (7) is installed in the rotating groove opened on the inner top of the mounting frame (3). The mounting block (7) is set as a circular structure. The mounting block (7) is set as a T-shaped structure. The mounting block (7) and the rotating groove form a rotating connection. The mounting block (7) and the mounting frame (3) form a rotating connection. The mounting block (7) is fixedly installed on the top of the injector (6). The injector (6) and the mounting frame (3) form a rotating connection. A through hole is opened in the middle of the mounting block (7). The inner diameter of the through hole is the same as the diameter of the rotating shaft. The lower end of the rotating shaft is in the through hole. The rotating shaft and the mounting block (7) are not fixedly connected. The sampling needle (8) is installed at the bottom eccentric position of the injector (6). The mounting frame (3) is set as a left and right part structure and is connected by four sets of fixing bolts.

6. The gas chromatography-mass spectrometry (GC-MS) instrument according to claim 1, characterized in that: The mounting plate (9) is not fixedly connected to the top of the base (1). The cylinder (10) is fixedly installed on the bottom left side of the base (1). The top telescopic end of the cylinder (10) passes through the through hole opened on the left side of the base (1). The top of the top telescopic end of the cylinder (10) is fixedly connected to the bottom center of the mounting plate (9). Four sets of limiting rods (11) are symmetrically installed on the bottom of the mounting plate (9). The limiting rods (11) are installed in the through hole opened on the left side of the base (1). The bottom of the limiting rods (11) is flush with the bottom of the cylinder (10).

7. A gas chromatography-mass spectrometry (GC-MS) instrument according to claim 1, characterized in that: The test tube rack (12) is configured as a can-shaped structure. The top and bottom of the test tube rack (12) are configured as closed structures. The bottom of the test tube rack (12) is fixedly connected to the top of the mounting plate (9) by a fixing bolt. The top of the test tube rack (12) is provided with eight sets of through holes, which form a ring structure. The outer diameter of the test tube (13) is the same as the inner diameter of the through holes. The bottom inner side of the test tube rack (12) is provided with eight sets of grooves corresponding to the eight sets of through holes. The inner dimensions of the grooves are adapted to the bottom dimensions of the test tube (13).

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