Sample introduction mechanism for gas chromatography mass spectrometer

Abstract

The utility model discloses a sample introduction mechanism for a gas chromatography mass spectrometer, and relates to the technical field of gas chromatography mass spectrometers. The chromatographic instrument comprises a chromatographic instrument main body, one side of the top of the chromatographic instrument main body is provided with a first sample inlet, the top of one side of the chromatographic instrument main body is provided with a second sample inlet, the top of the first sample inlet is rotatably connected with a protective cover through a hinge, and the top of the protective cover is provided with a sample inlet hole; a springback assembly is arranged in the protective cover, the springback assembly comprises a placement groove, the placement groove is formed in the protective cover, and a first spring is fixedly connected to one side of the inner wall of the placement groove. According to the utility model, the first sample injection port can be shielded and protected through the baffle plate which can be drawn back and forth, so that some impurities are prevented from falling into the first sample injection port, and the second sample injection port can be shielded and protected through the second sleeve which can be drawn back and forth, so that the safety of the second sample injection port when the second sample injection port is not used is effectively ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas chromatography-mass spectrometers, in particular to a sample injection mechanism for gas chromatography-mass spectrometers. Background Art

[0002] The injection mechanism in a gas chromatograph mass spectrometer is the key part for the sample to enter the instrument. Its main function is to introduce the sample to be tested into the gas chromatograph part in a suitable form for subsequent analysis. The functions of the injection mechanism include:

[0003] 1. Sample introduction: Accurately introduce liquid or gas samples into the gas chromatography column.

[0004] 2. Sample quantification: Control the volume and flow of the sample to ensure the accuracy and repeatability of the analysis results.

[0005] 3. Protect the chromatographic column: Use appropriate injection methods to prevent contamination and damage to the chromatographic column. Common injection methods include automatic injectors, manual injection, and gas sampling. Each method should be selected based on experimental requirements and sample characteristics.

[0006] Existing gas chromatograph-mass spectrometer sample injection mechanisms are mostly open-ended and lack any protective structures. This can lead to contaminants adhering to the sample inlet, potentially affecting the accuracy of subsequent sample testing. To address this issue, we provide a gas chromatograph-mass spectrometer sample injection mechanism to address this issue. Utility Model Content

[0007] The purpose of the utility model is to provide a sample injection mechanism for a gas chromatograph mass spectrometer, which solves the problem of unsatisfactory protection effect of the sample injection mechanism for a gas chromatograph mass spectrometer in the prior art through the cooperation of a rebound component and a protection component.

[0008] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0009] The utility model is a sample injection mechanism for a gas chromatograph mass spectrometer, comprising a chromatograph body, a first sample injection port being provided on one side of the top of the chromatograph body, a second sample injection port being provided on one side of the top of the chromatograph body, a protective cover being rotatably connected to the top of the first sample injection port via a hinge, and a sample injection hole being provided on the top of the protective cover;

[0010] The protective cover is provided with a rebound assembly, which includes a placement slot, the placement slot is opened inside the protective cover, a first spring is fixedly connected to one side of the inner wall of the placement slot, the other end of the first spring is fixedly connected to the movable plate, a rebound slot is opened inside the movable plate, a second spring is fixedly connected to the bottom of the rebound slot, a clamping block is fixedly connected to the top of the second spring, a clamping hole is opened on one side of the top of the protective cover, the other side of the movable plate is fixedly connected to a connecting rod, the other end of the connecting rod extends into the placement slot and is fixedly connected to a blocking piece;

[0011] A protection component is provided on the top of one side of the chromatograph main body, and the second sample inlet is provided inside the protection component, and the second sample inlet is protected by the protection component.

[0012] The utility model is further configured as follows: the protection component includes a first sleeve, the first sleeve is fixedly connected to the top of one side of the chromatograph body, the second sleeve is slidably connected inside the first sleeve, a receiving groove is provided on one side inside the second sleeve, a third spring is fixedly connected on one side inside the receiving groove, the other end of the third spring is fixedly connected to a moving block, the other side of the moving block is fixedly connected to an inclined block, and a card slot is provided on one side inside the first sleeve.

[0013] The present invention is further configured such that the interiors of the first sleeve and the second sleeve are both hollow structures for protecting the second injection port.

[0014] The present invention is further configured such that one side of the second sleeve is rotatably connected to a stopper via a hinge, for blocking the port of the second sleeve.

[0015] The present invention is further configured such that the number of the injection holes and the second injection ports are both three, and they are arranged at equal distances.

[0016] The present invention is further configured such that a pulling block is fixedly connected to one side of the top of the blocking piece for pulling the blocking piece.

[0017] The present invention is further configured such that the clamping hole and the clamping block are adapted to each other, and the clamping hole is circular.

[0018] The present invention is further configured such that the card slot and the inclined block are adapted to each other, and the card slot is square.

[0019] The utility model has the following beneficial effects:

[0020] 1. The utility model can shield and protect the first sample inlet through the baffle that can be pulled back and forth to prevent some impurities from falling into the first sample inlet. The second sleeve that can be pulled back and forth can shield and protect the second sample inlet, effectively ensuring the safety of the second sample inlet when not in use.

[0021] 2. The utility model can protect the second sample inlet by setting a hollow structure, and can block the opening by setting a block. Since the block is rotatably connected, it can be flipped open during the pulling process to facilitate the normal use of the second sample inlet. The setting of the pulling block can facilitate the pulling of the baffle.

[0022] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0024] Figure 1 A three-dimensional diagram of a sample injection mechanism for a gas chromatograph-mass spectrometer;

[0025] Figure 2 It is a side view of the partial structure explosion diagram of the injection mechanism for gas chromatography-mass spectrometer;

[0026] Figure 3 A diagram showing a first injection port and a second injection port in an injection mechanism for a gas chromatograph-mass spectrometer;

[0027] Figure 4 Injection mechanism for gas chromatography mass spectrometer Figure 2 A magnified view of middle A;

[0028] Figure 5 Injection mechanism for gas chromatography mass spectrometer Figure 2 Magnified view of B.

[0029] In the accompanying drawings: 1. Chromatograph body; 2. First injection port; 3. Second injection port; 4. Protective cover; 5. Injection hole; 6. Placement slot; 7. First spring; 8. Moving plate; 9. Rebound slot; 10. Second spring; 11. Card block; 12. Card hole; 13. Connecting rod; 14. Block; 15. First sleeve; 16. Second sleeve; 17. Storage slot; 18. Third spring; 19. Moving block; 20. Oblique block; 21. Card slot; 22. Block; 23. Pull block. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] For example 1, please refer to Figure 1-5The utility model is a sample injection mechanism for a gas chromatograph mass spectrometer, comprising a chromatograph body 1, a first sample injection port 2 being provided on one side of the top of the chromatograph body 1, a second sample injection port 3 being provided on one side of the top of the chromatograph body 1, a protective cover 4 being rotatably connected to the top of the first sample injection port 2 by a hinge, and a sample injection hole 5 being provided on the top of the protective cover 4; a rebound component being provided inside the protective cover 4, and the rebound component comprising a placement groove 6, the placement groove 6 being provided inside the protective cover 4, a first spring 7 being fixedly connected to one side of the inner wall of the placement groove 6, and the other end of the first spring 7 being fixed It is connected to a movable plate 8, a rebound groove 9 is opened inside the movable plate 8, a second spring 10 is fixedly connected to the bottom of the rebound groove 9, a clamping block 11 is fixedly connected to the top of the second spring 10, a clamping hole 12 is opened on one side of the top of the protective cover 4, and a connecting rod 13 is fixedly connected to the other side of the movable plate 8, and the other end of the connecting rod 13 extends to the inside of the placement groove 6 and is fixedly connected to a baffle 14; a protective component is provided on the top of one side of the chromatograph body 1, and the second sample inlet 3 is provided inside the protective component, and the second sample inlet 3 is protected by the protective component.

[0032] Specifically: The top of the protective cover 4 in the prior art is designed to be open. The purpose of the open design is to facilitate sampling. Although it is convenient for sampling, it also has certain problems. For example, when not in use, impurities are likely to fall into the interior of the first sampling port 2, thereby affecting the accuracy of subsequent detection. For this reason, the utility model has made innovations in protection, and this structural innovation is practical and simple in structure, so it is worth promoting.

[0033] A movable groove is provided on one side of the rebound groove 9. Through the design of the movable groove, the baffle 14 can be easily moved in the horizontal direction, providing space for movement. Through the design of the connecting rod 13, the baffle 14 can be fixed to the movable plate 8 to ensure that the movable plate 8 will drive the baffle 14 to move during the movement.

[0034] For example 2, please refer to Figure 1-5On the basis of the first embodiment, the protection component includes a first sleeve 15, the first sleeve 15 is fixedly connected to the top of one side of the chromatograph body 1, the first sleeve 15 is slidably connected to the second sleeve 16, the second sleeve 16 has a receiving groove 17 on one side, the receiving groove 17 has a third spring 18 fixedly connected to one side, the other end of the third spring 18 is fixedly connected to a moving block 19, the other side of the moving block 19 is fixedly connected to an inclined block 20, the first sleeve 15 has a slot 21 on one side, and the first sleeve 15 and the interior of the second sleeve 16 are both hollow structures, which are used to protect the second sampling port 3. A stopper 22 is connected to one side of the second sleeve 16 by a hinge, which is used to block the port of the second sleeve 16. The number of injection holes 5 and the second sampling port 3 are three, and they are arranged at equal distances. A pulling block 23 is fixedly connected to one side of the top of the baffle 14 for pulling the baffle 14. The card hole 12 and the card block 11 are adapted to each other, and the card hole 12 is circular. The card slot 21 and the inclined block 20 are adapted to each other, and the card slot 21 is square.

[0035] Specifically: through the setting of the third spring 18, the inclined block 20 can be rebounded so that the inclined block 20 is stuck in the slot 21. Through the setting of the hollow structure, the second sampling port 3 can be protected. Through the setting of the block 22, the opening can be blocked. Since the block 22 is a rotating connection, it can be flipped open during the pulling process to facilitate the normal use of the second sampling port 3. Through the setting of the pulling block 23, the baffle 14 can be easily pulled out.

[0036] The working principle of the utility model is as follows: when the first injection port 2 needs to be used normally, the blocking piece 14 is pulled by the pulling block 23 to move, the blocking piece 14 drives the connecting rod 13 to move, and the connecting rod 13 drives the movable plate 8 to move. When the movable plate 8 moves to the bottom of the clamping hole 12, the second spring 10 rebounds, and the force generated by the rebound drives the clamping block 11 to move, so that the clamping block 11 enters the clamping hole 12. When the clamping block 11 is stuck in the clamping hole 12, the blocking piece 14 no longer moves, and then the injection port 5 and the first injection port 2 can be used normally.

[0037] When the first injection port 2 needs to be protected, the card block 11 is pressed to make the card block 11 enter the rebound groove 9, and then the first spring 7 will rebound. The force generated by the rebound will push the movable plate 8 to move, and the movable plate 8 drives the connecting rod 13 to move. The connecting rod 13 drives the baffle 14 to move, so that the baffle 14 is inserted into the interior of the injection hole 5 to block the injection hole 5, and then the protection work of the first injection port 2 is completed.

[0038] The standard parts used in the present invention can all be purchased from the market, and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology. The control method is automatically controlled by a control unit. The control circuit of the control unit can be implemented by simple programming by technicians in this field, which is common knowledge in this field. Therefore, the control method and circuit connection are no longer explained in detail in the present invention.

[0039] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to specific implementation methods. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that technicians in the relevant technical field can better understand and utilize the present invention.

Claims

1. A sample injection mechanism for a gas chromatograph mass spectrometer, comprising a chromatograph body (1), characterized in that: A first injection port (2) is provided on one side of the top of the chromatograph body (1), a second injection port (3) is provided on one side of the top of the chromatograph body (1), the top of the first injection port (2) is rotatably connected to a protective cover (4) via a hinge, and an injection hole (5) is provided on the top of the protective cover (4); A rebound component is provided inside the protective cover (4), and the rebound component includes a placement groove (6), the placement groove (6) is opened inside the protective cover (4), a first spring (7) is fixedly connected to one side of the inner wall of the placement groove (6), the other end of the first spring (7) is fixedly connected to a movable plate (8), a rebound groove (9) is opened inside the movable plate (8), a second spring (10) is fixedly connected to the bottom of the rebound groove (9), a clamping block (11) is fixedly connected to the top of the second spring (10), a clamping hole (12) is opened on one side of the top of the protective cover (4), a connecting rod (13) is fixedly connected to the other side of the movable plate (8), and the other end of the connecting rod (13) extends into the placement groove (6) and is fixedly connected to a blocking piece (14); A protection component is provided on the top of one side of the chromatograph body (1), and the second injection port (3) is provided inside the protection component, and the second injection port (3) is protected by the protection component.

2. The sample injection mechanism for a gas chromatograph mass spectrometer according to claim 1, characterized in that: The protection component includes a first sleeve (15), the first sleeve (15) is fixedly connected to the top of one side of the chromatograph body (1), the first sleeve (15) is slidably connected to the inside of the second sleeve (16), a receiving groove (17) is provided on one side of the inside of the second sleeve (16), a third spring (18) is fixedly connected to one side of the inside of the receiving groove (17), the other end of the third spring (18) is fixedly connected to a moving block (19), the other side of the moving block (19) is fixedly connected to an inclined block (20), and a card slot (21) is provided on one side of the inside of the first sleeve (15).

3. The sample injection mechanism for a gas chromatograph mass spectrometer according to claim 2, characterized in that: The interiors of the first sleeve (15) and the second sleeve (16) are both hollow structures, and are used to protect the second injection port (3).

4. The sample injection mechanism for a gas chromatograph mass spectrometer according to claim 2, characterized in that: One side of the second sleeve (16) is rotatably connected to a stopper (22) via a hinge, and is used to block the port of the second sleeve (16).

5. The sample injection mechanism for a gas chromatograph-mass spectrometer according to claim 1, characterized in that: The number of the injection holes (5) and the second injection ports (3) are both three, and they are arranged at equal distances.

6. The sample injection mechanism for a gas chromatograph mass spectrometer according to claim 1, characterized in that: A pulling block (23) is fixedly connected to one side of the top of the blocking piece (14) and is used to pull the blocking piece (14).

7. The sample injection mechanism for a gas chromatograph-mass spectrometer according to claim 1, characterized in that: The clamping hole (12) and the clamping block (11) are adapted to each other, and the clamping hole (12) is circular.

8. The sample injection mechanism for a gas chromatograph mass spectrometer according to claim 2, characterized in that: The card slot (21) and the inclined block (20) are adapted to each other, and the card slot (21) is square.

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