Thermal purging sampling device of ion mobility spectrometer

Abstract

The utility model relates to the technical field of ion mobility spectrometer sampling, and discloses an ion mobility spectrometer hot purging sampling device which comprises a shell, an inclined plate is arranged on the inner wall of the shell, round rods are fixedly assembled on the two sides of the inclined plate, the outer edges of the round rods are rotationally connected with the inner wall of the shell in a sleeved mode, rotating gears are fixedly assembled on the side faces of the round rods, and the rotating gears are connected with the inclined plate in a sleeved mode. The side face of the rotating gear is rotationally connected with the side face of the shell, and a fixing frame is fixedly assembled on the side face of the shell. Through cooperative use of a positioning plate and a limiting plate, the positioning plate is driven by a protruding block to move in the inner wall of a fixing frame, then the limiting plate is moved in the direction away from the limiting frame, the side face of a first magnet plate and the side face of a second magnet plate attract each other, then the limiting plate is used for auxiliary limiting of the protruding block, and then an adjusting rod is rotated; therefore, the adjusting rod is used for driving the adjusting gear to rotate, the adjusting gear and the transmission gear are used for driving the rotating gear and the auxiliary gear to rotate, and then the angle of the inclined plate is adjusted.

Description

Technical Field

[0001] This utility model relates to the field of ion mobility spectrometer sampling technology, specifically to a thermal purge sampling device for ion mobility spectrometers. Background Art

[0002] Ion mobility spectrometry (IMA) separates and identifies ions based on the difference in ion drift time. To assist IMA in stable sampling, a thermal purge sampling device for IMA is required.

[0003] Traditional ion mobility spectrometer (IMP) thermal purge sampling devices utilize a sampling device to thermally purge the sampling area. This helps the sample to be vaporized by the expelled hot gas or detached from the object attached to the sample. A negative pressure is then created at the sampling pipe inlet, allowing the vaporized or detached sample to be smoothly drawn into the sampling pipe. The vaporized or detached sample then accumulates on the sample attachment plate, thus completing the sampling process. However, traditional IMP thermal purge sampling devices are difficult to adjust the hot gas inlet according to the sample size. This can easily lead to partial heating of the sample during the heating process, potentially damaging the sample and affecting the stable operation of the device. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a thermal purge sampling device for ion mobility spectrometers to solve the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a thermal purge sampling device for an ion mobility spectrometer, comprising a housing, an inclined plate provided on the inner wall of the housing, round rods fixedly mounted on both sides of the inclined plate, and the outer edges of the round rods rotatably sleeved with the inner wall of the housing, a rotating gear fixedly mounted on the side of the round rods, and the side of the rotating gear rotatably connected to the side of the housing, a fixed frame fixedly mounted on the side of the housing, a positioning plate slidably connected to the inner wall of the fixed frame, and a transmission gear rotatably connected to the side of the housing, wherein the shape and size of the protruding teeth on the outer edge of the transmission gear are adapted to the shape and size of the groove on the side of the positioning plate.

[0006] As a preferred embodiment of this utility model, an adjusting gear is rotatably connected to the side of the outer shell, an adjusting rod is fixedly mounted on the side of the adjusting gear, an auxiliary gear is rotatably connected to the side of the outer shell, and the convex teeth on the outer edge of the adjusting gear mesh with the convex teeth on the outer edge of the auxiliary gear and the convex teeth on the outer edge of the transmission gear.

[0007] As a preferred embodiment of this utility model, a spring is fixedly connected to the side of the inner wall of the fixed frame, and the end of the spring away from the inner wall of the fixed frame is fixedly connected to the side of the positioning plate. A protrusion is fixedly mounted on the side of the positioning plate, and a magnet plate is fixedly mounted on the inner wall of the protrusion.

[0008] As a preferred technical solution of this utility model, a limiting frame is fixedly assembled on the side of the fixed frame, a limiting plate is slidably connected to the inner wall of the limiting frame, and a second magnet plate is fixedly assembled on the inner wall of the limiting plate, and the side of the second magnet plate away from the rotating gear is attracted to the side of the first magnet plate close to the rotating gear.

[0009] As a preferred embodiment of this utility model, there are two inclined plates, and two round rods are fixedly mounted on both sides of each inclined plate.

[0010] As a preferred embodiment of this utility model, a sampling tube is fixedly mounted on the inner wall of the outer shell, and a heating plate is fixedly mounted on the top and bottom of the sampling tube. A fan is provided on the side of each of the two heating plates, and the two fans are fixedly mounted to the top and bottom of the sampling tube respectively. A sample attachment plate is slidably connected to the inner wall of the outer shell, and a vacuum pump is fixedly mounted on the side of the outer shell.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The thermal purge sampling device of this ion mobility spectrometer uses a positioning plate and a limiting plate in cooperation. The protrusion drives the positioning plate to move within the inner wall of the fixed frame. Then, the limiting plate moves away from the limiting frame, so that the sides of magnet plate one and magnet plate two are attracted to each other. The limiting plate then assists in limiting the protrusion. After that, the adjusting rod is rotated, which drives the adjusting gear to rotate. The adjusting gear and the transmission gear drive the rotating gear and the auxiliary gear to rotate, thereby adjusting the angle of the inclined plate.

[0013] 2. The thermal purge sampling device of this ion mobility spectrometer uses the cooperation of a spring and a positioning plate. The spring pushes the positioning plate, and the inner wall of the positioning plate limits the protrusion of the outer edge of the transmission gear. The side of the positioning plate near the rotating gear limits the side of the protrusion away from the transmission gear, thereby limiting the angle of the inclined plate after adjustment. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the orthographic section of the present invention;

[0016] Figure 3 This is a schematic diagram of the partially disassembled structure of the utility model;

[0017] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0018] Figure 5 This is a schematic diagram of the internal structure of the outer shell of this utility model;

[0019] Figure 6 This is a schematic diagram of the limiting frame structure of this utility model.

[0020] In the diagram: 1. Outer shell; 2. Inclined plate; 3. Round rod; 4. Sampling tube; 5. Rotating gear; 6. Transmission gear; 7. Adjusting gear; 8. Adjusting rod; 9. Auxiliary gear; 10. Fixing frame; 11. Positioning plate; 12. Protrusion; 13. Magnet plate one; 14. Spring; 15. Limiting plate; 16. Magnet plate two; 17. Limiting frame; 18. Fan; 19. Heating plate; 20. Vacuum pump; 21. Sample attachment plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Please see Figures 1-6 The ion mobility spectrometer thermal purge sampling device includes a housing 1. An inclined plate 2 is provided on the inner wall of the housing 1. Round rods 3 are fixedly mounted on both sides of the inclined plate 2, and the outer edges of the round rods 3 are rotatably sleeved with the inner wall of the housing 1. A rotating gear 5 is fixedly mounted on the side of the round rod 3, and the side of the rotating gear 5 is rotatably connected to the side of the housing 1. A fixing frame 10 is fixedly mounted on the side of the housing 1. A positioning plate 11 is slidably connected to the inner wall of the fixing frame 10. A transmission gear 6 is rotatably connected to the side of the housing 1, and the shape and size of the protruding teeth on the outer edge of the transmission gear 6 are adapted to the shape and size of the groove on the side of the positioning plate 11. Through the cooperation of the rotating gear 5 and the round rod 3, the rotating gear 5 drives the round rod 3 to rotate, thereby driving the inclined plate 2 to rotate, thus assisting in adjusting the thermal purge range inside the housing 1.

[0023] In a preferred embodiment, an adjusting gear 7 is rotatably connected to the side of the housing 1, an adjusting rod 8 is fixedly mounted on the side of the adjusting gear 7, and an auxiliary gear 9 is rotatably connected to the side of the housing 1. The convex teeth on the outer edge of the adjusting gear 7 mesh with the convex teeth on the outer edge of the auxiliary gear 9 and the convex teeth on the outer edge of the transmission gear 6. Through the cooperation of the adjusting gear 7 and the adjusting rod 8, the adjusting rod 8 drives the adjusting gear 7 to rotate, thereby driving the auxiliary gear 9 and the transmission gear 6 to rotate.

[0024] In a preferred embodiment, a spring 14 is fixedly connected to the side of the inner wall of the fixed frame 10, and one end of the spring 14 away from the inner wall of the fixed frame 10 is fixedly connected to the side of the positioning plate 11. A protrusion 12 is fixedly mounted on the side of the positioning plate 11, and a magnetic plate 13 is fixedly mounted on the inner wall of the protrusion 12. Through the cooperation of the spring 14 and the positioning plate 11, the spring 14 pushes the positioning plate 11 in the inner wall of the fixed frame 10, thereby engaging the inner wall of the positioning plate 11 with the protruding teeth on the outer edge of the transmission gear 6. Furthermore, the addition of the protrusion 12 allows for position adjustment within the inner wall of the fixed frame 10 by the side of the protrusion 12. This, in turn, facilitates the positional movement of the positioning plate 11.

[0025] In a preferred embodiment, a limiting frame 17 is fixedly mounted on the side of the fixed frame 10. A limiting plate 15 is slidably connected to the inner wall of the limiting frame 17. A second magnet plate 16 is fixedly mounted on the inner wall of the limiting plate 15. The side of the second magnet plate 16 away from the rotating gear 5 is attracted to the side of the first magnet plate 13 near the rotating gear 5. Through the cooperation of the second magnet plate 16 and the limiting plate 15, the protrusion 12 drives the positioning plate 11 to move away from the transmission gear 6, and then the limiting plate 15 moves away from the inner wall of the limiting frame 17. Then, the side of the second magnet plate 16 is attracted to the first magnet plate 13, thereby assisting the limiting plate 15 in limiting the protrusion 12. Thus, the protrusion 12 drives the positioning plate 11 to separate stably from the transmission gear 6.

[0026] In a preferred embodiment, there are two inclined plates 2, and two round rods 3 are fixedly mounted on both sides of the two inclined plates 2. By adding the two inclined plates 2, the installation angle of the two inclined plates 2 can be adjusted to help adjust the heat purging range.

[0027] In a preferred embodiment, a sampling tube 4 is fixedly mounted on the inner wall of the outer casing 1. A heating plate 19 is fixedly mounted on the top and bottom of the sampling tube 4. A fan 18 is provided on the side of each of the two heating plates 19, and the two fans 18 are fixedly mounted to the top and bottom of the sampling tube 4, respectively. A sample attachment plate 21 is slidably connected to the inner wall of the outer casing 1. A vacuum pump 20 is fixedly mounted on the side of the outer casing 1. The heating plate 19 and the fan 18 work together to assist the device in thermal purging. The vacuum pump 20 works together with the sample attachment plate 21 to collect samples through the sample attachment plate 21.

[0028] Working principle: When the device is in use, the protrusion 12 drives the positioning plate 11 to move within the inner wall of the fixed frame 10. Then, the limiting plate 15 moves away from the limiting frame 17, thereby attracting the sides of the first magnet plate 13 and the second magnet plate 16. The limiting plate 15 then assists in limiting the protrusion 12. After that, the adjusting rod 8 is rotated, thereby driving the adjusting gear 7 to rotate. The adjusting gear 7 and the transmission gear 6 drive the rotating gear 5 and the auxiliary gear 9 to rotate, thereby adjusting the angle of the inclined plate 2. The spring 14 pushes the positioning plate 11, thereby limiting the protrusions on the outer edge of the transmission gear 6 with the inner wall of the positioning plate 11. The limiting plate 15, on the side closer to the rotating gear 5, limits the side of the protrusion 12 away from the transmission gear 6, thereby limiting the angle of the inclined plate 2 after adjustment.

[0029] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thermal purge sampling device for an ion mobility spectrometer, comprising a housing (1), characterized in that: The inner wall of the outer shell (1) is provided with an inclined plate (2). Round rods (3) are fixedly mounted on both sides of the inclined plate (2), and the outer edge of the round rods (3) is rotatably sleeved with the inner wall of the outer shell (1). A rotating gear (5) is fixedly mounted on the side of the round rods (3), and the side of the rotating gear (5) is rotatably connected to the side of the outer shell (1). A fixed frame (10) is fixedly mounted on the side of the outer shell (1), and a positioning plate (11) is slidably connected to the inner wall of the fixed frame (10). A transmission gear (6) is rotatably connected to the side of the outer shell (1), and the shape and size of the protruding teeth on the outer edge of the transmission gear (6) are adapted to the shape and size of the groove on the side of the positioning plate (11). An adjusting gear (7) is rotatably connected to the side of the outer shell (1), and an adjusting rod (8) is fixedly mounted on the side of the adjusting gear (7). An auxiliary gear (9) is rotatably connected to the side of the outer shell (1). The outer edge of the tooth meshes with the outer edge of the auxiliary gear (9) and the outer edge of the transmission gear (6). A spring (14) is fixedly connected to the side of the inner wall of the fixed frame (10), and the end of the spring (14) away from the inner wall of the fixed frame (10) is fixedly connected to the side of the positioning plate (11). A protrusion (12) is fixedly mounted on the side of the positioning plate (11). A magnet plate (13) is fixedly mounted on the inner wall of the protrusion (12). A sampling tube (4) is fixedly mounted on the inner wall of the outer shell (1). A heating plate (19) is fixedly mounted on the top and bottom of the sampling tube (4). A fan (18) is provided on the side of each of the two heating plates (19), and the two fans (18) are fixedly mounted on the top and bottom of the sampling tube (4) respectively. A sample attachment plate (21) is slidably connected to the inner wall of the outer shell (1). A vacuum pump (20) is fixedly mounted on the side of the outer shell (1).

2. The ion mobility spectrometer thermal purge sampling device according to claim 1, characterized in that: A limiting frame (17) is fixedly mounted on the side of the fixed frame (10). A limiting plate (15) is slidably connected to the inner wall of the limiting frame (17). A second magnet plate (16) is fixedly mounted on the inner wall of the limiting plate (15). The side of the second magnet plate (16) away from the rotating gear (5) is attracted to the side of the first magnet plate (13) close to the rotating gear (5).

3. The ion mobility spectrometer thermal purge sampling device according to claim 1, characterized in that: The number of inclined plates (2) is two, and the connection structure of the two inclined plates (2) is completely identical.

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