Fourier infrared spectrometer

Abstract

The invention discloses a Fourier infrared spectrometer, and relates to the technical field of material detection, the Fourier infrared spectrometer comprises an equipment main body, the inner side of the equipment main body is rotatably provided with a flip cover, the bottom surface of the inner side of the equipment main body is rotatably provided with a workbench, and the equipment main body is internally provided with a sample detection structure; the sample detection structure comprises a mounting frame, a fixing ring I, a motor and a plurality of liquid storage boxes, the mounting frame is fixedly connected with the equipment main body, the fixing ring I and the motor are arranged at the top of the workbench, an electric push rod I is arranged at the top of the mounting frame, and one end of the electric push rod I penetrates through the mounting frame and is fixedly connected with a storage box. According to the Fourier infrared spectrometer, bearing can be carried out according to different solid or liquid materials, and meanwhile it can be ensured that the solid or liquid materials are prevented from being thrown out in the rotating process.

Description

Technical Field

[0001] This invention relates to the field of materials testing technology, and in particular to a Fourier transform infrared spectrometer. Background Technology

[0002] Fourier transform infrared spectrometers are widely used in the field of materials testing. They can measure the absorption and reflection spectra of various gas, solid, and liquid samples, and can also be used for short-time chemical reaction measurements. Typically, a light source is input, and the light emitted by the light source is split into two beams by a beam splitter, a fixed mirror, and a moving mirror, which then form a certain optical path difference. The beams are then combined to produce interference for the detection of solid, liquid, and other materials.

[0003] Chinese patent publication number "CN218823911U" discloses a "Fourier transform infrared spectrometer for the detection of nanomaterials, including a main body of the device and a scanning stage fixedly installed at the top of the main body, wherein a sample holding mechanism is fixedly arranged at the top of the scanning stage." Although it can achieve the effect of "quickly changing multiple samples, saving time and effort, bringing convenience to the staff, and being easy to disassemble, simple and quick to operate, and easy for the staff to maintain," it requires rotation during the detection process. When rotating, the liquid or solid material inside the sample stage will be shaken out, affecting the subsequent scanning detection work. Therefore, this invention proposes a Fourier transform infrared spectrometer. Summary of the Invention

[0004] The main objective of this invention is to provide a Fourier transform infrared spectrometer that can effectively solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A Fourier transform infrared spectrometer includes a main body, a flip cover rotatably disposed on the inner side of the main body, a worktable rotatably disposed on the inner bottom surface of the main body, and a sample detection structure disposed inside the main body. The sample detection structure includes a mounting frame, a fixing ring, a motor, and several liquid storage boxes. The mounting frame is fixedly connected to the main body of the equipment. The fixing ring and the motor are both located on the top of the worktable. An electric push rod is located on the top of the mounting frame, and one end of the electric push rod passes through the mounting frame and is fixedly connected to a storage box. The outside of the storage box has a light source inlet and a detection scanning port. A beam splitter and a fixed mirror are fixedly installed on the inside of the storage box, and a multi-stage electric telescopic rod is installed on the inside of the storage box. One end of the multi-stage electric telescopic rod is fixedly connected to a moving mirror. The output shaft of the motor is fixedly connected to a gear ring. The liquid storage box is rotatably connected to a sample support stage. The sample support stage is fixedly connected to a gear disk, and the gear disk and gear ring are meshed together.

[0006] As a preferred embodiment of the present invention, the top of the workbench is provided with several square holes, the bottom of the liquid storage box is fixedly provided with a base, and the base is provided with a limiting hole on the outside, and the base and the square holes of the workbench are compatiblely matched.

[0007] As a preferred embodiment of the present invention, an elastic tube clamp is fixedly provided on the outside of the liquid storage box, and a fixing rod is fixedly provided on the outside of the sample support stage, wherein the fixing rod and the elastic tube clamp are adaptively matched.

[0008] As a preferred embodiment of the present invention, a clamping mechanism is provided on the top of the sample support stage. The clamping mechanism includes three mounting plates, which are fixedly connected to the sample support stage. An electric push rod is provided on one side of the mounting plate, and one end of the electric push rod passes through the mounting plate and is fixedly connected to a placement plate. A base plate is fixedly provided on one side of the placement plate, and a sliding rod is fixedly provided on one side of the base plate. A limit tube is slidably provided on the outside of the sliding rod, and a spring is provided between the limit tube and the base plate.

[0009] In a preferred embodiment of the present invention, the liquid storage box is penetrated by a gear disk, and the bottom surface of the gear ring is flush with the top surface of the fixing ring.

[0010] As a preferred embodiment of the present invention, the bottom of the workbench is provided with a fastening structure, the fastening structure including a sliding ring and screws, the sliding ring being fixedly connected to the workbench, two fixing plates being fixedly provided on the outside of the sliding ring, a movable ring being rotatably provided on the inside of the sliding ring, a plurality of connecting plates being fixedly provided on the outside of the movable ring, and a clamping plate being fixedly connected to the connecting plate, and a second fixing plate being fixedly provided on the outside of the movable ring.

[0011] As a preferred technical solution of the present invention, both the first fixing plate and the second fixing plate are provided with threaded holes on their exteriors, and the threads of the screws are compatible with the threads of the threaded holes of the first fixing plate and the second fixing plate.

[0012] As a preferred embodiment of the present invention, the card plate is arc-shaped, and the limiting holes of the card plate and the base are adaptively matched.

[0013] As a preferred technical solution of the present invention, the top of the workbench is provided with a limiting structure, the limiting structure includes a second fixing ring and a fixing frame, the second fixing ring is fixedly connected to the workbench, the fixing frame is fixedly connected to the main body of the equipment, a fixing bracket is fixedly provided on the outside of the second fixing ring, a limiting rod is provided through the top of the fixing frame, an operating plate is fixedly provided on the bottom of the limiting rod, and a second spring is provided between the operating plate and the inner bottom surface of the fixing frame.

[0014] As a preferred embodiment of the present invention, the top of the fixing frame is provided with a plurality of insertion holes, and the limiting rod and the insertion holes of the fixing frame are adaptively matched.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up a sample detection structure, the spectrometer can be used in different states depending on whether it is a solid or liquid material. When detecting liquid materials, the liquid can be placed inside the storage box, and when detecting solid materials, the solid material can be placed on the sample support stage. The sample support stage can prevent the liquid material from being shaken out of the storage box and spilled into the inside of the device body during the rotation of the storage box, thus improving stability. 2. By setting up elastic clamps and fixing rods in conjunction with the sample detection structure, it is beneficial to further strengthen the tightness between the liquid storage box and the sample carrier stage, ensuring that the sample carrier stage completely seals the liquid storage box. At the same time, it can prevent the sample carrier stage from rotating during the removal of the liquid storage box, which would cause the liquid material inside the liquid storage box to spill out. 3. By setting up a clamping mechanism in conjunction with the sample detection structure, it is beneficial to clamp irregular solid materials and hold them in the middle of the top of the sample support stage. This ensures that the solid materials remain stationary during rotation and prevents them from being thrown out of the sample support stage during rotation. 4. By setting up a fastening structure in conjunction with the sample detection structure, the position of the base can be restricted, which facilitates the installation and disassembly of the base and makes it easier to remove the liquid storage box later so that the liquid material inside the liquid storage box can be processed. At the same time, the worktable, base, and clamping plate, together with the liquid storage box, can restrict the position of the liquid storage box, which is beneficial for the alignment work after rotation. 5. By setting a limiting structure in conjunction with the sample detection structure, it is beneficial to restrict the position of the worktable. The limiting rod, together with the insertion hole of the fixing frame, can ensure that the liquid storage box and sample carrier stage after rotating at a predetermined angle are located directly below the detection scanning port, which is beneficial to subsequent detection and analysis work. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a Fourier transform infrared spectrometer after the flip cover is opened according to the present invention. Figure 2 This is a side view of the cross-sectional structure of the storage box of a Fourier transform infrared spectrometer according to the present invention. Figure 3 This is a three-dimensional structural diagram showing the disassembled base and worktable of a Fourier transform infrared spectrometer according to the present invention. Figure 4 This is a three-dimensional structural diagram of the liquid storage box and sample support stage of a Fourier transform infrared spectrometer according to the present invention. Figure 5This is a three-dimensional structural schematic diagram of a portion of a Fourier transform infrared spectrometer according to the present invention; Figure 6 This is a three-dimensional structural diagram of the limiting tube and slide bar of a Fourier transform infrared spectrometer according to the present invention. Figure 7 This is a schematic diagram of the disassembled three-dimensional structure of the moving ring and the sliding ring of a Fourier transform infrared spectrometer according to the present invention; Figure 8 This is a three-dimensional structural diagram of the fixed ring two of a Fourier transform infrared spectrometer according to the present invention. Figure 9 This is a three-dimensional structural diagram of the limiting rod and fixing frame of a Fourier transform infrared spectrometer according to the present invention. Figure 10 This is a schematic diagram of the overall front view of the Fourier transform infrared spectrometer after the flip cover is opened according to the present invention. Figure 11 This is a schematic diagram of the overall three-dimensional structure of a Fourier transform infrared spectrometer after the flip cover is closed, according to the present invention.

[0017] In the diagram: 1. Main body of the equipment; 2. Flip-top; 3. Worktable; 4. Sample detection structure; 5. Fastening structure; 6. Limiting structure; 7. Mounting bracket; 8. Fixing ring 1; 9. Motor; 10. Liquid storage box; 11. Electric push rod 1; 12. Storage box; 13. Light source inlet; 14. Detection scanning port; 15. Beam splitter; 16. Fixed mirror; 17. Multi-stage electric telescopic rod; 18. Moving mirror; 19. Gear ring; 20. Base; 21. Sample support stage; 22. Gear 23. Disc; 24. Elastic pipe clamp; 25. Fixing rod; 26. Mounting plate; 27. Electric push rod II; 28. Shelf; 29. ​​Base plate; 30. Slide rod; 31. Limiting tube; 32. Spring I; 33. Slide ring; 34. Screw; 35. Fixing plate I; 36. Movable ring; 37. Connecting plate; 38. Clamping plate; 39. Fixing ring II; 40. Fixing frame; 41. Fixing frame; 42. Limiting rod; 43. Operating plate; 44. Spring II. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0019] like Figures 1-11 As shown, a Fourier transform infrared spectrometer includes a main body 1, a flip cover 2 rotatably disposed on the inner side of the main body 1, a worktable 3 rotatably disposed on the inner bottom surface of the main body 1, and a sample detection structure 4 disposed inside the main body 1. The sample detection structure 4 includes a mounting frame 7, a fixing ring 8, a motor 9, and several liquid storage boxes 10. The mounting frame 7 is fixedly connected to the main body of the equipment 1. The fixing ring 8 and the motor 9 are both located on the top of the workbench 3. An electric push rod 11 is located on the top of the mounting frame 7, and one end of the electric push rod 11 passes through the mounting frame 7 and is fixedly connected to a storage box 12. The outside of the storage box 12 has a light source inlet 13 and a detection scanning port 14. A beam splitter 15 and a fixed mirror 16 are fixedly installed on the inside of the storage box 12, and a multi-stage electric telescopic rod 17 is installed on the inside of the storage box 12. One end of the multi-stage electric telescopic rod 17 is fixedly connected to a moving mirror 18. The output shaft of the motor 9 is fixedly connected to a gear ring 19. The liquid storage box 10 is rotatably connected to a sample support stage 21. The sample support stage 21 is fixedly connected to a gear disk 22, and the gear disk 22 and the gear ring 19 are meshed together.

[0020] The sample detection structure 4 allows the spectrometer to operate in different states depending on whether it is a solid or liquid material. When detecting liquid materials, the liquid can be placed inside the storage box 10, and when detecting solid materials, the solid material can be placed on the sample support stage 21. The sample support stage 21 can prevent the liquid material from being shaken out of the storage box 10 and spilled into the device body 1 during the rotation process, thus improving stability.

[0021] In this embodiment, the top of the workbench 3 is provided with several square holes, the bottom of the liquid storage box 10 is fixedly provided with a base 20, and the outside of the base 20 is provided with a limiting hole. The base 20 and the square holes of the workbench 3 are compatiblely matched.

[0022] The base 20 is inserted into the square hole of the workbench 3 to restrict the position of the liquid storage box 10.

[0023] In this embodiment, the liquid storage box 10 is externally fixed with an elastic tube clamp 23, and the sample carrier stage 21 is externally fixed with a fixing rod 24. The fixing rod 24 and the elastic tube clamp 23 are adaptively matched.

[0024] The elastic tube clamp 23 and the fixing rod 24, together with the sample detection structure 4, can further strengthen the tightness between the liquid storage box 10 and the sample support stage 21, ensuring that the sample support stage 21 completely seals the liquid storage box 10. At the same time, it can prevent the sample support stage 21 from rotating during the removal of the liquid storage box 10, which would cause the liquid material inside the liquid storage box 10 to spill out.

[0025] In this embodiment, a clamping mechanism is provided on the top of the sample support stage 21. The clamping mechanism includes three mounting plates 25. The mounting plates 25 are fixedly connected to the sample support stage 21. An electric push rod 26 is provided on one side of the mounting plate 25. One end of the electric push rod 26 passes through the mounting plate 25 and is fixedly connected to a placement plate 27. A base plate 28 is fixedly provided on one side of the placement plate 27. A slide rod 29 is fixedly provided on one side of the base plate 28. A limit tube 30 is slidably provided on the outside of the slide rod 29. A spring 31 is provided between the limit tube 30 and the base plate 28.

[0026] The clamping mechanism, in conjunction with the sample detection structure 4, can clamp irregular solid materials and hold them at the top center of the sample support stage 21. This ensures that the solid materials remain stationary during rotation and prevents them from being thrown out of the sample support stage 21 during rotation.

[0027] In this embodiment, the liquid storage box 10 is penetrated by the gear disk 22, and the bottom surface of the gear ring 19 is flush with the top surface of the fixing ring 8.

[0028] The fixed ring 8 provides auxiliary support to the gear ring 19.

[0029] In this embodiment, a fastening structure 5 is provided at the bottom of the workbench 3. The fastening structure 5 includes a sliding ring 32 and screws 33. The sliding ring 32 is fixedly connected to the workbench 3. Two fixing plates 34 are fixedly provided on the outside of the sliding ring 32. A movable ring 35 is rotatably provided on the inside of the sliding ring 32. Several connecting plates 36 are fixedly provided on the outside of the movable ring 35, and a clamping plate 37 is fixedly connected to the connecting plate 36. A second fixing plate 38 is fixedly provided on the outside of the movable ring 35.

[0030] The fastening structure 5, together with the sample detection structure 4, can restrict the position of the base 20, making it easy to install and remove the base 20. This facilitates the removal of the liquid storage box 10 later, allowing the liquid material inside the liquid storage box 10 to be processed. At the same time, the worktable 3, the base 20, and the clamping plate 37, together with the liquid storage box 10, can restrict the position of the liquid storage box 10, which is beneficial for the alignment work after rotation.

[0031] In this embodiment, threaded holes are provided on the outside of both the first fixing plate 34 and the second fixing plate 38, and the threads of the screw 33 are compatible with the threads of the threaded holes of the first fixing plate 34 and the second fixing plate 38.

[0032] Fixing plate 1 34 and fixing plate 2 38 are fixed by screw 33.

[0033] In this embodiment, the card plate 37 is arc-shaped, and the limiting holes of the card plate 37 and the base 20 are compatiblely matched.

[0034] The card plate 37 is inserted into the limiting hole of the base 20 to limit and fix the base 20.

[0035] In this embodiment, a limiting structure 6 is provided on the top of the workbench 3. The limiting structure 6 includes a second fixing ring 39 and a fixing frame 41. The second fixing ring 39 is fixedly connected to the workbench 3, and the fixing frame 41 is fixedly connected to the main body of the equipment 1. A fixing bracket 40 is fixedly provided on the outside of the second fixing ring 39. A limiting rod 42 is provided through the top of the fixing frame 41. An operating plate 43 is fixedly provided on the bottom of the limiting rod 42, and a second spring 44 is provided between the operating plate 43 and the inner bottom surface of the fixing frame 41.

[0036] The limiting structure 6, together with the sample detection structure 4, can restrict the position of the worktable 3. The limiting rod 42, together with the insertion hole of the fixing frame 40, can make the liquid storage box 10 and the sample carrier stage 21, after being rotated at a predetermined angle, located directly below the detection scanning port 14, which is beneficial to subsequent detection and analysis work.

[0037] In this embodiment, the top of the fixing frame 40 is provided with several insertion holes, and the limiting rod 42 and the insertion holes of the fixing frame 40 are compatiblely matched.

[0038] Under the action of spring 44, the limiting rod 42 is inserted into the insertion hole of the fixing frame 40 to fix the position of the worktable 3.

[0039] It should be noted that this invention is a Fourier transform infrared spectrometer. Before use, it is placed in the required location, and the light source is shone into the light source inlet 13 of the storage box 12. The multi-stage electric telescopic rod 17 is activated to move the moving mirror 18 back and forth inside the storage box 12, so that the light source, with the cooperation of the beam splitter 15, the fixed mirror 16, and the moving mirror 18, emits light from the detection scanning port 14 to detect the material below. The base 20 is inserted into the corresponding square hole of the worktable 3, so that the gear disk 22 and the gear ring 19 are meshed and connected. The movable ring 35 is rotated so that the clamping plate 37 is inserted into the corresponding limiting hole of the base 20. Then, the fixing plate 1 34 and the fixing plate 2 38 are fixed by the screw 33. At this time, the base 20 is completely fixed, and the limiting rod 42 is inserted into the corresponding insertion hole of the fixing frame 40, so that it can meet the working conditions. When solid materials need to be analyzed, open the flip cover 2, place the solid material on the corresponding sample support stage 21, and activate the electric push rod 26 to move the placement plate 27 towards the solid material to the predetermined position and then stop. When the limiting tube 30 contacts the solid material, according to the irregular shape of the solid material, the limiting tubes 30 clamp the solid material with the cooperation of the spring 31. At this time, the limiting tubes 30 adapt to the irregular surface of the solid material to contact and clamp it, so that the solid material is clamped in the top middle position of the sample support stage 21. At this time, one of the sample support stages 21 is located directly below the detection scanning port 14. Activate the electric push rod 26. Push rod 11 moves the storage box 12 down to the predetermined position and stops. At this time, the solid material clamped on the top of the sample carrier stage 21 can be analyzed and tested. After the test is completed, push rod 11 moves the storage box 12 back to the initial position. Press the operation plate 43 to move the limit rod 42 down and pull it out from the socket of the fixing frame 40. Rotate the worktable 3 to move the next sample carrier stage 21 to the bottom of the detection scanning port 14 and stop. Release the operation plate 43 and the limit rod 42 is inserted into the socket of the fixing frame 40 under the action of spring 44 for limitation. At this time, start push rod 11 to move the storage box 12 down and the solid material can be tested. When liquid testing is required, in situations such as Figure 1 Based on this, the motor 9 is started, causing the gear ring 19 to engage with the gear disk 22 until the sample support stage 21 rotates open and stops. At this point, the interior of the liquid storage box 10 is fully exposed, and the fixing rod 24 moves out from the inside of the elastic tube clamp 23, allowing the liquid to be tested to be introduced into the inside of the liquid storage box 10. Then, the starting electric push rod 11 is activated, causing the storage box 12 to move down to the predetermined position and stop. At this point, the liquid material inside the liquid storage box 10 can be analyzed and tested. After the test is completed, the motor 9 rotates the sample support stage 21 back to the initial position. Then, the operation plate 43 is pressed to lower the limit rod 42. Pull the sample carrier 21 out from the socket of the fixed frame 40, rotate the worktable 3 so that the next sample carrier 21 moves to the bottom of the detection scanning port 14 and stops. Since the sample carrier 21 covers and seals the liquid storage box 10 during the rotation, the sample liquid inside the liquid storage box 10 will not shake out of the liquid storage box 10 due to the rotation. Then, release the operation plate 43 and the limit rod 42 is inserted into the socket of the fixed frame 40 under the action of the second spring 44. The sample carrier 21 is rotated and opened by the motor 9. Then the storage box 12 is moved down by the electric push rod 11 and the liquid material can be detected. When the liquid material needs to be processed after the liquid material is tested and analyzed, the sample support stage 21 is rotated back to its initial position by the motor 9. At this time, the sample support stage 21 covers and seals the liquid storage box 10. At the same time, the fixing rod 24 is inserted into the inner side of the elastic tube clamp 23. The screw 33 is removed. At this time, the movable ring 35 is no longer restricted. Rotating the movable ring 35 causes the clamping plate 37 to move out of the limiting hole of the base 20. After removing the base 20, it is rotated to open. The liquid inside the liquid storage box 10 can be poured into the external storage device. Then the inside of the liquid storage box 10 is cleaned. After completion, the base 20 is reinstalled in the corresponding square hole of the workbench 3. The movable ring 35 is rotated to insert the clamping plate 37 into the limiting hole of the base 20 to fix it. Finally, the screw 33 is installed.

Claims

1. A Fourier transform infrared spectrometer, comprising a main body (1), wherein a flip cover (2) is rotatably disposed on the inner side of the main body (1), and a worktable (3) is rotatably disposed on the inner bottom surface of the main body (1), characterized in that: The main body of the device (1) is equipped with a sample detection structure (4). The sample detection structure (4) includes a mounting frame (7), a fixing ring (8), a motor (9), and several liquid storage boxes (10). The mounting frame (7) is fixedly connected to the main body of the equipment (1). The fixing ring (8) and the motor (9) are both located on the top of the workbench (3). An electric push rod (11) is located on the top of the mounting frame (7), and one end of the electric push rod (11) passes through the mounting frame (7) and is fixedly connected to a storage box (12). The storage box (12) has a light source inlet (13) and a detection scanning port (10) on its exterior. 14) A beam splitter (15) and a fixed mirror (16) are fixedly installed on the inner side of the storage box (12), and a multi-stage electric telescopic rod (17) is installed on the inner side of the storage box (12). A moving mirror (18) is fixedly connected to one end of the multi-stage electric telescopic rod (17). A gear ring (19) is fixedly connected to the output shaft of the motor (9). A sample support stage (21) is rotatably connected to the liquid storage box (10). A gear disk (22) is fixedly connected to the sample support stage (21), and the gear disk (22) and the gear ring (19) are meshed together.

2. The Fourier transform infrared spectrometer according to claim 1, characterized in that: The top of the workbench (3) has several square holes, and the bottom of the liquid storage box (10) is fixedly provided with a base (20), and the base (20) has a limit hole on its outside. The square holes of the base (20) and the workbench (3) are compatible.

3. A Fourier transform infrared spectrometer according to claim 1, characterized in that: The liquid storage box (10) is externally fixed with an elastic tube clamp (23), and the sample carrier stage (21) is externally fixed with a fixing rod (24). The fixing rod (24) and the elastic tube clamp (23) are compatiblely matched.

4. A Fourier transform infrared spectrometer according to claim 1, characterized in that: The sample support platform (21) is provided with a clamping mechanism at its top. The clamping mechanism includes three mounting plates (25). The mounting plates (25) are fixedly connected to the sample support platform (21). One side of the mounting plate (25) is provided with an electric push rod (26), and one end of the electric push rod (26) passes through the mounting plate (25) and is fixedly connected to a shelf (27). One side of the shelf (27) is fixedly provided with a base plate (28), and one side of the base plate (28) is fixedly provided with a slide rod (29). A limit tube (30) is slidably provided on the outside of the slide rod (29), and a spring (31) is provided between the limit tube (30) and the base plate (28).

5. A Fourier transform infrared spectrometer according to claim 1, characterized in that: The liquid storage box (10) is penetrated by the gear disk (22), and the bottom surface of the gear ring (19) is flush with the top surface of the fixing ring (8).

6. A Fourier transform infrared spectrometer according to claim 2, characterized in that: The bottom of the workbench (3) is provided with a fastening structure (5), which includes a sliding ring (32) and screws (33). The sliding ring (32) is fixedly connected to the workbench (3). Two fixing plates (34) are fixedly provided on the outside of the sliding ring (32). A movable ring (35) is rotatably provided on the inside of the sliding ring (32). Several connecting plates (36) are fixedly provided on the outside of the movable ring (35), and a clamping plate (37) is fixedly connected to the connecting plate (36). A second fixing plate (38) is fixedly provided on the outside of the movable ring (35).

7. A Fourier transform infrared spectrometer according to claim 6, characterized in that: Both the first fixing plate (34) and the second fixing plate (38) have threaded holes on their exteriors, and the threads of the screw (33) are compatible with the threads of the threaded holes of the first fixing plate (34) and the second fixing plate (38).

8. A Fourier transform infrared spectrometer according to claim 6, characterized in that: The card plate (37) is arc-shaped, and the limiting holes of the card plate (37) and the base (20) are compatible.

9. A Fourier transform infrared spectrometer according to claim 1, characterized in that: The top of the workbench (3) is provided with a limiting structure (6), which includes a second fixing ring (39) and a fixing frame (41). The second fixing ring (39) is fixedly connected to the workbench (3), and the fixing frame (41) is fixedly connected to the main body of the equipment (1). A fixing bracket (40) is fixedly installed on the outside of the second fixing ring (39). A limiting rod (42) is provided through the top of the fixing frame (41). An operating plate (43) is fixedly installed at the bottom of the limiting rod (42), and a second spring (44) is provided between the operating plate (43) and the inner bottom surface of the fixing frame (41).

10. A Fourier transform infrared spectrometer according to claim 9, characterized in that: The top of the fixing frame (40) is provided with several insertion holes, and the insertion holes of the limiting rod (42) and the fixing frame (40) are compatiblely matched.

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