Sample introduction device for tandem mass spectrum

Abstract

The invention discloses a sample introduction device for tandem mass spectrometry, and belongs to the technical field of compound detection devices.The sample introduction device comprises a partition ionization mechanism, the partition ionization mechanism comprises a cover body arranged on a conveying line, air cylinders are fixedly installed on the two sides of the top end of the cover body, piston rods on the air cylinders are connected to side plates, and the top end of the cover body is provided with a baffle; the bottom of the side plate penetrates through the cover body and extends to the conveying line; an ion source for ionizing a sample is mounted at the top end of the inner wall of the cover body; and the blade heat dissipation mechanism comprises a first motor fixed to the periphery of the cover body, and one end of an output shaft of the first motor extends to the first blade through a first bevel gear. The technical problems that a sensing and refrigerating system is complex in design, inconvenient to maintain and high in cost once being damaged, and the working effect of the whole refrigerating system is affected due to the fact that the temperature of a refrigerant medium can be reduced when the difference between the internal temperature and the external temperature of the environment is small, and the heat transfer efficiency is reduced can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of compound detection devices, and particularly relates to a sample injection device for tandem mass spectrometry. Background Art

[0002] Mass spectrometry is a spectroscopic method parallel to spectroscopy. Generally speaking, it is a specialized technique widely used in various disciplinary fields to identify compounds by preparing, separating, and detecting gas-phase ions. Mass spectrometry can provide rich structural information in a single analysis. The combination of separation techniques and mass spectrometry is a breakthrough in separation science methods. Among numerous analytical and testing methods, mass spectrometry is considered a general method with high specificity, high sensitivity, and wide application. A mass spectrometer generally consists of parts such as a sample introduction system, an ion source, a mass analyzer, a detector, and a data processing system.

[0003] Mass spectrometry detection usually needs to be carried out in a sealed environment. By ionizing the sample to generate charged ions, the mass-to-charge ratio between the magnetic field and the electric field is used for separation and detection, and finally a mass spectrum is formed. A mass spectrometer is also called a mass spectrograph. An instrument for separating and detecting different isotopes. That is, based on the principle that charged particles can be deflected in an electromagnetic field, a class of instruments that separate and detect the composition of substances according to the mass differences of atomic, molecular, or molecular fragment masses of substances. Mass spectrometers are classified into isotope mass spectrometers, inorganic mass spectrometers, and organic mass spectrometers according to the application range. They are classified into high-resolution, medium-resolution, and low-resolution mass spectrometers according to the resolution; they are classified into static instruments and dynamic instruments according to the working principle.

[0004] During the mass spectrometry detection process, relatively high requirements are often placed on the environmental temperature. Therefore, a cooler and a sensing system are used to effectively control and adjust the environmental temperature. However, the design of the sensing and refrigeration systems is relatively complex. Once damaged, the repair is inconvenient and the cost is relatively high. Moreover, when the temperature difference between the inside and outside of the environment is small, the temperature of the refrigerant medium will decrease, resulting in a decrease in the heat transfer efficiency. This will affect the working effect of the entire refrigeration system, and the compressor may stop working and cannot refrigerate normally, which will also affect the temperature adjustment work inside the device and further affect the stable progress of the detection work. Summary of the Invention

[0005] The purpose of the present invention is to provide a sample injection device for tandem mass spectrometry to solve the technical problems that the design of the sensing and refrigeration systems is relatively complex, once damaged, the repair is inconvenient and the cost is relatively high, and when the temperature difference between the inside and outside of the environment is small, the temperature of the refrigerant medium will decrease, resulting in a decrease in the heat transfer efficiency, which will affect the working effect of the entire refrigeration system.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions: A sample injection device for tandem mass spectrometry, comprising: A partition ionization mechanism, which includes a cover body placed on the conveyor line. Both sides of the top of the cover body are fixedly installed with cylinders. The piston rods on the cylinders are connected to the side plates. The bottom of the side plates penetrates through the cover body and extends to the conveyor line. An ion source for ionizing samples is installed at the top of the inner wall of the cover body; A blade heat dissipation mechanism, which includes a first motor fixed around the cover body. One end of the output shaft of the first motor extends to the first blade through a first bevel gear. The outer wall of the first bevel gear is meshed and driven with a second bevel gear fixed on the reciprocating lead screw. The upper and lower ends of the outer wall of the reciprocating lead screw are respectively helically driven with a first slider and a second slider moving in the same direction; The first slider and the baffle are connected by a swing rod. An expansion port is provided on the side wall of the cover body at the edge of the outer wall of the baffle. One end of the first slider extends and is connected to an inclined plate above the first blade by a plug-in installation method.

[0007] Further, a second motor is provided directly below the baffle. The second motor and the side wall of the cover body are fixedly connected by a cross beam. The output shaft of the second motor is connected to a telescopic rod. The outer wall of the telescopic rod is connected with second blades distributed in a ring shape. The first slider and the second slider are both connected with strip-shaped grooves along the height direction of the inner wall of the cover body, and the first slider and the second slider are connected by a synchronous rod. The synchronous rod is symmetrically arranged with respect to the center of the telescopic rod. Both sides of the swing rod are connected to the first slider and the baffle by a rotational connection method.

[0008] Further, one end of the second slider is connected with a bearing placed on the telescopic rod. An inwardly concave annular groove is provided at the edge of the outer wall of the telescopic rod. The second blades and the first blades are perpendicular to each other.

[0009] Further, it further includes a water-cooling temperature reduction mechanism, which includes a conduction pipe installed on the side plate. The conduction pipe is arranged in a stepped shape extending downward in the direction of water flow, and one end of the conduction pipe is connected to a water tank through a water pump, and the other end is connected to a heat exchanger through a water pipe. The heat exchanger and the water tank are connected by a U-shaped pipe to form a water circulation loop.

[0010] Further, sealing blocks are rotatably connected to the water inlet and outlet of the conduction pipe through hinges. One end of the sealing block abuts against the corner of the conduction pipe. Sealing rings that are movably abutted against the water pipes are provided at both ends of the conduction pipe.

[0011] Furthermore, a resistance rod is movably connected at the corner of the inner wall of the guide tube, one end of the resistance rod extends to the first gear plate inside the cover body, the outer wall of the first gear plate is transmitted with a second gear plate placed at the bottom of the shielding plate through rotating gear meshing, the second gear plate is fixed to the shielding plate in a detachable manner, and the second gear plate and the first gear plate are kept vertically arranged, and a movable cavity is formed between the first gear plate, the second gear plate and the inner wall of the cover body.

[0012] Furthermore, a movable opening connected to the resistance rod is provided on the inner wall of the conducting pipe, and a rolling groove is provided on the side wall of the cover body through the central axis of the rotating tooth. As the baffle plate opens the vent on the cover body, the resistance rod pushes the blockage at the corner of the conducting pipe back and forth under the meshing transmission action of the rotating tooth, thereby ensuring the normal fluidity of the water body.

[0013] Furthermore, the conveying line is installed on the frame and extends along a preset direction to carry and convey the sample, and a sealed cavity is formed between the side plate, the cover body and the conveying line.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: A barrier ionization mechanism is set up. When the sample enters the cover through the conveyor line, the curtains at both ends of the cover can play a certain dust-proof barrier role, and together with the side plates on the cylinder, it can have a good sealing effect on the detection environment. Through the ionization effect of the ion source, it can effectively avoid external interference, ensure the stability of the detection work, and improve the accuracy of data detection. A blade heat dissipation mechanism is provided. When the cover is not working, the baffles are closed. When the cover needs to dissipate heat, the first motor is started. Under the action of mechanical transmission, the first blade rotates to dissipate heat and forms an upward wind flow. At the same time, under the action of gear meshing transmission, in conjunction with the spiral transmission of the first slider, the baffle can be moved back and forth, so that the baffle can be stored and adjusted in the telescopic opening, thereby opening the ventilation hole, which can ensure the timely discharge of heat and have an effective cooling and regulating effect. In addition, under the action of spiral transmission, the second slider can drive the second blade on the telescopic rod to move up and down through the bearing. In conjunction with the second blade, different height positions can be rotated to dissipate heat, thereby expanding the heat dissipation area and area. In conjunction with the upward derived airflow, the wind speed can be further accelerated, thereby ensuring the timely discharge of heat and the cooling effect inside the device, thereby effectively regulating the temperature inside the device. (3) A water-cooling mechanism is provided. By utilizing the large specific heat capacity of water, the side plate transfers the heat inside the device to the water in the conducting pipe by means of heat transfer. When the side plate descends, it can play a corresponding sealing effect on the detection environment, thereby ensuring the stable progress of the detection work. At the same time, the conducting pipe can also be connected with the cooling water pipe assembly to ensure the normal circulation of the water body. The conducting pipe is arranged in a stepped shape extending downward in the direction of the water flow. With the sealing block connected by the hinge, under the action of the communicating vessel principle and the one-way valve assembly, it can effectively prevent the liquid from flowing back. Moreover, when the baffle plate moves, under the meshing transmission of the rotating teeth, it can push and resist at the corner of the conducting pipe through the resistance rod, thereby effectively preventing the occurrence of pipe blockage, further ensuring the stability of the water flow, and under the regulation of water cooling, it can further play a cooling role, thereby accurately regulating the temperature inside the device and ensuring the stability of the sample detection environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 The present invention is a schematic diagram of a sample injection device for tandem mass spectrometry. Figure 1 ; Figure 2 The present invention is a schematic diagram of a sample injection device for tandem mass spectrometry. Figure 2 ; Figure 3 Schematic diagram of meshing transmission between the first bevel gear and the second bevel gear of the present invention; Figure 4 is a schematic diagram of the interior of the cover body of the present invention; Figure 5 It is a front view of the interior of the cover body of the present invention; Figure 6 The present invention Figure 5 A magnified image of point A; Figure 7 It is a schematic diagram of the connection between the side plate and the conducting pipe of the present invention; Figure 8 is a schematic diagram of the interior of the conducting tube of the present invention; Figure 9 The present invention Figure 8 The enlarged view of point B; Figure 10 Schematic diagram of meshing transmission of rotating gears of the present invention; Figure 11 It is a schematic diagram of the wind direction flow when the first blade of the present invention rotates.

[0017] Reference numerals: 1, partition ionization mechanism; 2, conveyor line; 3, cover body; 4, cylinder; 5, side plate; 6, blade heat dissipation mechanism; 7, first motor; 8, first bevel gear; 9, first blade; 10, reciprocating lead screw; 11, second bevel gear; 12, first slider; 13, second slider; 14, baffle plate; 15, swing rod; 16, inclined plate; 17, second motor; 18, telescopic rod; 19, second blade; 20, synchronizing rod; 21, bearing; 22, water-cooling cooling mechanism; 23, conduction pipe; 24, water pump; 25, water tank; 26, heat exchanger; 27, hinge; 28, sealing block; 29, abutting rod; 30, first gear plate; 31, rotating tooth; 32, second gear plate. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Refer to the attached drawings of the specification Figure 1 and the attached Figure 2 As shown, a sample injection device for tandem mass spectrometry includes: a partition ionization mechanism 1, and the partition ionization mechanism 1 includes a cover body 3 placed on a conveyor line 2. Both sides of the top end of the cover body 3 are fixedly installed with cylinders 4. The piston rods on the cylinders 4 are connected to a side plate 5. The bottom of the side plate 5 penetrates through the cover body 3 and extends to the conveyor line 2. An ion source for ionizing the sample is installed at the top end of the inner wall of the cover body 3; Ions are generated by ionizing the sample, and the ions are separated according to the mass-to-charge ratio by using an electric field or a magnetic field. Finally, a mass spectrum is detected and formed for qualitative and quantitative analysis.

[0020] By setting the partition ionization mechanism 1, when the sample enters the inside of the cover body 3 through the conveyor line 2, the curtain walls at both ends of the cover body 3 can play a certain role in dust prevention and blocking, and in cooperation with the side plate 5 on the cylinder 4, it can achieve a good sealing effect on the detection environment. Through the ionization effect of the ion source, the interference from the outside is effectively avoided, ensuring the stable progress of the detection work and improving the accuracy of data detection.

[0021] Refer to Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6, the blade heat dissipation mechanism 6. The blade heat dissipation mechanism 6 includes a first motor 7 fixed around the housing 3. One end of the output shaft of the first motor 7 extends to the first blade 9 through a first bevel gear 8. A second bevel gear 11 fixed on the reciprocating lead screw 10 is meshed and driven on the outer wall of the first bevel gear 8. The upper and lower ends of the outer wall of the reciprocating lead screw 10 are respectively in screw drive with a first slider 12 and a second slider 13 that move in the same direction; The first slider 12 and the baffle 14 are connected by a swing rod 15. An expansion port placed on the side wall of the housing 3 is provided at the outer wall edge of the baffle 14. One end extension of the first slider 12 is connected to an inclined plate 16 above the first blade 9 by means of plug-in installation.

[0022] Specifically, the first motor 7, the first bevel gear 8, and the second bevel gear 11 are all placed in a housing on the outer wall of the housing 3. The housing can play a corresponding protective and partition role for the above transmission parts, and can also provide corresponding support force. After the first motor 7 is started, it can drive the rotation of the first blade 9. During the rotation of the first blades 9 at both ends, an upward air flow towards the ventilation hole can be formed, so that the heat inside the device can be discharged in time. The meshing transmission of the first bevel gear 8 and the second bevel gear 11 can drive the rotation of the reciprocating lead screw 10 in the vertical direction. And under the screw drive action, combined with the rotational connection action of the swing rod 15, it can drive the baffle 14 to open or close. And during the opening process of the baffle 14, the heat can be discharged. During the up and down movement of the second slider 13 in the strip-shaped groove, it can drive the second blade 19 connected to the telescopic rod 18 on the bearing 21 to move up and down. In this way, during the up and down movement of the second blade 19, the heat can be discharged by expanding the area, and it converges with the upward moving air flow to increase the wind speed and accelerate the cooling time. The bearing 21 can not only drive the telescopic rod 18 to move up and down normally, but also provide corresponding support force for the rotating telescopic rod 18 to prevent the situation of position deviation during the rotation process.

[0023] In addition, the setting of the inclined plate 16 on the first slider 12 can play a guiding role for the upward moving fluid, so that it can be discharged towards the ventilation hole centrally, and the wind speed can be further accelerated by reducing the area. Extended, in order to further expand the reduced area, the inclined plate 16 can be adaptively set to a conical cover that can be combined into a ring, which can also play a role of centralized contraction to prevent the heat from circulating in the housing 3.

[0024] A blade heat dissipation mechanism 6 is set. When the cover body 3 is not working, the baffle plates 14 are closed. When the cover body 3 needs to dissipate heat, the first motor 7 is started. Under the action of mechanical transmission, the first blade 9 rotates to dissipate heat and forms an upward wind flow. At the same time, under the action of gear meshing transmission, in conjunction with the spiral transmission of the first slider 12 on the reciprocating screw 10, the baffle plate 14 can be moved back and forth, so that the baffle plate 14 can be accommodated and adjusted in the telescopic opening, thereby opening the ventilation hole, which can ensure the timely discharge of heat and have an effective cooling and regulating effect. In addition, under the action of spiral transmission, the second slider 13 can drive the second blade 19 on the telescopic rod 18 to move up and down through the bearing 21. In conjunction with the second blade 19, different height positions can be rotated to dissipate heat, thereby expanding the heat dissipation area and area. In conjunction with the upward derived airflow, the wind speed can be further accelerated, thereby ensuring the timely discharge of heat and the cooling effect inside the device, thereby effectively regulating the temperature inside the device.

[0025] A second motor 17 is provided directly below the baffle plate 14, and the second motor 17 is fixedly connected to the side wall of the cover body 3 by a cross beam, and the output shaft of the second motor 17 is connected to the telescopic rod 18, and the outer wall of the telescopic rod 18 is connected to a second blade 19 distributed in an annular manner, and the first slider 12 and the second slider 13 are connected with strip grooves along the height direction of the inner wall of the cover body 3, and the first slider 12 and the second slider 13 are connected by a synchronization rod 20, and the synchronization rod 20 is symmetrically arranged relative to the center of the telescopic rod 18, and both sides of the swing rod 15 are connected to the first slider 12 and the baffle plate 14 by a rotational connection.

[0026] In addition, one end of the second slider 13 is connected to a bearing 21 placed on the telescopic rod 18. The outer wall edge of the telescopic rod 18 is provided with an inwardly recessed annular groove. The second blade 19 and the first blade 9 are maintained in a vertical setting. The above-mentioned vertical setting can discharge heat when the airflow flows through structural coordination. At the same time, the synchronization rod 20 between the first slider 12 and the second slider 13 can ensure the stability of the structural movement and play a role in synchronous lifting and lowering.

[0027] refer to Figure 2 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 A sample injection device for tandem mass spectrometry also includes a water cooling mechanism 22, which includes a conducting pipe 23 installed on the side plate 5, and the conducting pipe 23 is arranged in a stepped manner extending downward in the direction of water flow, and one end of the conducting pipe 23 is connected to a water tank 25 through a water pump 24, and the other end is connected to a heat exchanger 26 through a water pipe. The heat exchanger 26 and the water tank 25 are connected by a U-shaped pipe to form a water circulation loop.

[0028] The heat exchanger 26 adopted in the present invention is a plate heat exchanger, which is a device that realizes efficient heat exchange through the fluid channels between metal plates. Its core principle is based on heat conduction and forced convection. The heat transfer efficiency is enhanced through the corrugated plate design. The hot fluid flows into from the diagonal holes at the four corners of the plate, flows reversely or in the same direction along the corrugated channels, exchanges heat through the plates, and finally flows out from the other diagonal hole.

[0029] Specifically, both the water inlet and outlet of the conduction pipe 23 are rotatably connected with a sealing block 28 through a hinge 27. One end of the sealing block 28 abuts and fits against the corner of the conduction pipe 23. Sealing rings that are movably abutted against the water pipes are provided at both ends of the conduction pipe 23. The corners of the inner wall of the conduction pipe 23 are movably connected with a resisting rod 29. One end of the resisting rod 29 extends to a first gear plate 30 inside the cover body 3. A second gear plate 32 placed at the bottom of the shielding plate 14 is meshed and driven by the outer wall of the first gear plate 30 through a rotating tooth 31. The second gear plate 32 is fixed on the shielding plate 14 in a detachable installation manner, and the second gear plate 32 and the first gear plate 30 are kept perpendicular to each other. An activity cavity is formed between the first gear plate 30, the second gear plate 32 and the inner wall of the cover body 3.

[0030] A water-cooling cooling mechanism 22 is provided. By utilizing the relatively large specific heat capacity of water, the side plate 5 transfers the heat inside the device to the water body in the conduction pipe 23 through heat transfer. During the descending process of the side plate 5, it can play a corresponding sealing effect on the detection environment, thereby ensuring the stable progress of the detection work. At the same time, it can also dock the conduction pipe 23 with the cooling water pipe assembly to ensure the normal circulation of the water body. The conduction pipe 23 is arranged in a stepped shape extending downward along the water flow direction. Cooperating with the sealing block 28 connected by the hinge 27, under the action of the communicating vessel principle and the one-way valve assembly, the situation of liquid backflow can be effectively prevented. Moreover, during the movement of the shielding plate 14, under the meshing and driving action of the rotating tooth 31, it can play a role of pushing and resisting at the corner of the conduction pipe 23 through the resisting rod 29, thereby effectively preventing the occurrence of pipeline blockage, further ensuring the stability of the water body circulation. Under the adjustment of water-cooling cooling, it can further play a cooling role, thereby accurately adjusting the temperature inside the device and ensuring the stability of the sample detection environment.

[0031] An activity port connected with the resisting rod 29 is provided on the inner wall of the conduction pipe 23. A rolling groove is provided on the side wall of the cover body 3 on the central axis of the rotating tooth 31. As the shielding plate 14 opens the ventilation port on the cover body 3, under the meshing and driving action of the rotating tooth 31, the resisting rod 29 pushes back and forth at the blocked part at the corner of the conduction pipe 23 to ensure the normal fluidity of the water body. The conveyor line 2 is installed on the frame and extends along a preset direction for carrying and conveying samples, and a sealing cavity is formed among the side plate 5, the cover body 3 and the conveyor line 2.

[0032] Specifically, the water inlet and the water outlet of the conducting pipe 23 are both rotatably connected to a sealing block 28 via a hinge 27. The sealing block 28 connected by the hinge 27 cooperates with the extended end of the sealing block 28 to be connected to the corner of the conducting pipe 23, and can be used as a one-way valve structure. When the water flows normally, the sealing block 28 rotates to the right and opens the guide groove. When the water flows back, the sealing block 28 rotates to the right and closes the guide groove to prevent backflow. In addition, the conducting pipe 23 extending downward in a stepped manner can facilitate the flow of water, and under the action of the pressure difference, the liquid will not flow back. At the same time, the shape setting of the conducting pipe 23 can also expand the contact area with the side plate 5, so that more heat can be transferred to the water through heat transfer.

[0033] In addition, during the horizontal movement, the baffle plate 14 can drive the movement of the vertical gear plate, and under the action of mechanical transmission, it can drive the synchronous movement of the resistance rod 29. During the back-and-forth movement, the resistance rod 29 can push the blockage of the vertical guide pipe 23 to ensure the normal flow of the guide groove. Moreover, the first gear plate 30 is arranged in the horizontal direction, and a push rod can be adaptively added. At the same time, the push rod can extend to the horizontal position of the guide pipe 23, so that the blockage at the horizontal corner of the guide pipe 23 can be pushed and opened. Although the push rod is not drawn in the drawings of the specification of the present invention, and there is no corresponding drawing mark to indicate it, it is a conventional technical means for those skilled in the art, and therefore does not affect the effective implementation of the technical solution of the present invention.

[0034] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0035] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A sample injection device for tandem mass spectrometry, characterized in that, Comprising: A partition ionization mechanism (1), the partition ionization mechanism (1) includes a cover body (3) placed on a conveyor line (2), both sides of the top end of the cover body (3) are fixedly installed with cylinders (4), the piston rods on the cylinders (4) are connected to side plates (5), the bottom of the side plates (5) penetrates through the cover body (3) and extends to the conveyor line (2), and an ion source for ionizing samples is installed at the top end of the inner wall of the cover body (3); A blade heat dissipation mechanism (6), the blade heat dissipation mechanism (6) includes a first motor (7) fixed around the cover body (3), one end of the output shaft of the first motor (7) extends to a first blade (9) through a first bevel gear (8), and a second bevel gear (11) fixed on a reciprocating lead screw (10) is meshed and driven on the outer wall of the first bevel gear (8), and a first slider (12) and a second slider (13) that move in the same direction are respectively helically driven on the upper and lower ends of the outer wall of the reciprocating lead screw (10); The first slider (12) is connected to a baffle (14) through a swing rod (15), a telescopic opening placed on the side wall of the cover body (3) is provided at the edge of the outer wall of the baffle (14), and an inclined plate (16) above the first blade (9) is connected to the extended end of one end of the first slider (12) in a plug-in installation manner.

2. The sample injection device for tandem mass spectrometry according to claim 1, wherein A second motor (17) is provided directly below the baffle (14), the second motor (17) is fixedly connected to the side wall of the cover body (3) through a cross beam, the output shaft of the second motor (17) is connected to a telescopic rod (18), a second blade (19) distributed in a ring is connected to the outer wall of the telescopic rod (18), strip-shaped grooves are connected to both the first slider (12) and the second slider (13) along the height direction of the inner wall of the cover body (3), and the first slider (12) and the second slider (13) are connected through a synchronizing rod (20), the synchronizing rod (20) is symmetrically arranged with respect to the center of the telescopic rod (18), and both sides of the swing rod (15) are connected to the first slider (12) and the baffle (14) in a rotatable connection manner.

3. The sample injection device for tandem mass spectrometry according to claim 2, wherein, One end of the second slider (13) is connected to a bearing (21) placed on the telescopic rod (18), an annular groove recessed inward is provided at the edge of the outer wall of the telescopic rod (18), and the second blade (19) and the first blade (9) are kept perpendicular to each other.

4. A sample injection device for tandem mass spectrometry according to claim 1, characterized in that, It further includes a water-cooling temperature reduction mechanism (22), the water-cooling temperature reduction mechanism (22) includes a conduction pipe (23) installed on the side plate (5), the conduction pipe (23) is arranged in a stepped shape extending downward along the water flow direction, and one end of the conduction pipe (23) is connected to a water tank (25) through a water pump (24), and the other end is connected to a heat exchanger (26) through a water pipe, and the heat exchanger (26) and the water tank (25) are connected through a U-shaped pipe to form a water body circulation loop.

5. According to claim 4, a sample for tandem mass spectrometry A sample introduction device, characterized in that, The water inlet and outlet of the conduction pipe (23) are both rotatably connected with a sealing block (28) through a hinge (27). One end of the sealing block (28) abuts and fits against the corner of the conduction pipe (23). Sealing rings that are movably abutted against the water pipes are provided at both ends of the conduction pipe (23).

6. The sample injection device for tandem mass spectrometry according to claim 5, wherein At the inner wall corners of the conduction pipe (23), there are movably connected abutting rods (29). One end of the abutting rod (29) extends to a first gear plate (30) inside the cover body (3). On the outer wall of the first gear plate (30), there is a second gear plate (32) placed at the bottom of the shielding plate (14) that is meshed and driven through rotating teeth (31). The second gear plate (32) is fixed to the shielding plate (14) in a detachable installation manner, and the second gear plate (32) and the first gear plate (30) are vertically arranged. An activity cavity is formed among the first gear plate (30), the second gear plate (32), and the inner wall of the cover body (3).

7. The sample injection device for tandem mass spectrometry according to claim 6, characterized in that, On the inner wall of the conduction pipe (23), there are activity ports connected to the abutting rods (29). The central axis on the rotating teeth (31) is provided with a rolling groove on the side wall of the cover body (3). As the shielding plate (14) opens the ventilation opening on the cover body (3), under the meshing and driving action of the rotating teeth (31), the abutting rods (29) push back and forth into the blocked parts at the corners of the conduction pipe (23) to ensure the normal fluidity of the water body.

8. A sample injection device for tandem mass spectrometry according to claim 1, characterized in that, The conveyor line (2) is installed on the frame and extends along a preset direction for carrying and conveying samples. A sealing cavity is formed among the side plate (5), the cover body (3), and the conveyor line (2).

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