Fluorescence spectrophotometer

Abstract

The utility model relates to the technical field of photometers, in particular to a fluorescence spectrophotometer. The device comprises a main body, a sample frame and a jacking assembly, a controller and a display screen are arranged on the front side of the device, a connecting plate and a fixing plate are arranged on the side face of the device, a sampling pipe is arranged at the bottom of the connecting plate and connected with a liquid pump in the main body, and the sample frame is arranged on the fixing plate. A jacking assembly aligned with the sampling tube is further arranged on the fixing plate, and the jacking assembly is provided with a jacking mechanism used for jacking and sampling a sample. According to the utility model, the rotatable sample frame is arranged, the sample changing mechanism is used for driving the sample frame to intermittently rotate at a fixed angle, so that samples can be aligned with the sampling tubes one by one without manually changing positions, meanwhile, the jacking assembly is arranged, and test tubes aligned with the sampling tubes in the sample frame can be driven by the jacking assembly to ascend; and the sampling tube is inserted into the test tube, so that sampling is realized, the whole operation is simple, and the sampling efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of photometers, in particular to a fluorescence spectrophotometer. Background Art

[0002] A fluorescence spectrophotometer is an analytical instrument used to measure the fluorescence intensity of fluorescent substances in a sample. It excites the fluorescent substance in the sample to enter an excited state, and then measures the fluorescence intensity emitted by the transition from the ground state to the excited state. The fluorescence spectrophotometer uses laser or ultraviolet light as an excitation light source to excite the fluorescent substance in the sample. Once the fluorescent substance is excited, it emits fluorescence, which can be measured by a fluorescence spectrophotometer.

[0003] A Chinese patent with authorization announcement number CN219201354U discloses an atomic fluorescence photometer that is easy to replace samples. The sample replacement mechanism is set up, and the threaded tube drives the fixed seat to move downward, so that the test tube inside the fixed seat is separated from the sampling tube, and the test tube is taken out for sample replacement. The test tube that needs to be replaced is placed in the fixed seat, and the stepper motor is controlled to reverse, so that the threaded tube drives the fixed seat to move upward. After the fixed seat moves to the top, the sampling tube is inserted into the test tube, and the liquid pump inside the main body of the atomic fluorescence photometer extracts the sample to be tested through the sampling tube, which can facilitate the rapid replacement of samples.

[0004] However, in actual use, the fluorescence photometer mentioned above needs to take out the test tubes from the sample changing mechanism one by one, and then put them into the fixed seat to move them. The sampling method is more troublesome, and after one sampling is completed, it needs to be taken out of the fixed seat and put into the next one, so the sampling efficiency is low. Utility Model Content

[0005] In view of the problems existing in the background technology, a fluorescence spectrophotometer is proposed. A rotatable sample rack is provided, and a sample changing mechanism is used to drive the sample rack to rotate intermittently at a fixed angle, so that the samples can be aligned with the sampling tubes one by one without manual position change. At the same time, a lifting component is provided, and the lifting component can be used to drive the test tube aligned with the sampling tube in the sample rack to rise, so that the sampling tube is inserted into the test tube, so that sampling can be performed. The overall operation is simple and the sampling efficiency is high.

[0006] The utility model provides a fluorescence spectrophotometer, comprising

[0007] A main body having a controller and a display screen, with a sampling tube and a fixing plate arranged on its side;

[0008] A sample rack rotatably mounted on a fixed plate and having a sample changing mechanism for changing the position of samples in the sample rack; and

[0009] A lifting assembly is arranged on a fixed plate and has a lifting mechanism for lifting and sampling samples.

[0010] Preferably, the sample rack comprises a rotating shaft, a connecting rod and a tube sleeve, the rotating shaft rotates and penetrates the fixed plate, a connecting rod is obliquely arranged on the outer side thereof, and a tube sleeve is arranged at one end of the connecting rod;

[0011] The connecting rods and the pipe sleeves are arranged in multiple groups at equal intervals in a circle, and a through opening is opened at the bottom of the pipe sleeve.

[0012] Preferably, the sample changing mechanism comprises

[0013] The toothed disc is mounted at the bottom end of the rotating shaft, and a plurality of groups of tooth blocks are arranged at equal intervals on the outer side of the toothed disc. The outer sides of the plurality of groups of tooth blocks are all provided with locking arcs, and an insertion gap is formed between two adjacent groups of tooth blocks.

[0014] A conversion motor is mounted on a fixed plate, an output end of which passes through the fixed plate and is connected to a disk, and an outer circumference of the disk is matched with a locking arc; and

[0015] The inserting teeth are arranged on the outside of the disc and matched with the insertion gap.

[0016] Preferably, the lifting assembly includes a guide column, a slide plate and a push rod, the guide column is arranged at the bottom of the fixed plate, the slide plate is slidably arranged on the guide column, the push rod is arranged on the top of the slide plate, and the push rod passes through the fixed plate and is symmetrically arranged with the corresponding opening.

[0017] Preferably, two groups of guide posts are provided, and the bottom ends of the guide posts are connected with anti-slip plates to prevent the slide plate from slipping off the guide posts.

[0018] Preferably, the lifting mechanism includes a lifting motor, a connecting shaft and a cam, and mounting plates are symmetrically arranged on the side of the main body. The connecting shaft is rotatably arranged between two groups of mounting plates. A cam is arranged on the connecting shaft, and the outer circumference of the cam abuts against the bottom of the slide. A lifting motor connected to the connecting shaft is arranged on the outer side of the corresponding mounting plate.

[0019] Through the above technical scheme, the fluorescence spectrophotometer disclosed by the utility model is provided with a rotatable sample rack, and a sample changing mechanism is used to drive the sample rack to rotate intermittently at a fixed angle, so that the test tubes on the sample rack can be aligned with the sampling tubes one by one without manual position change. At the same time, a lifting component is provided, and the lifting component can be used to drive the test tubes in the sample rack aligned with the sampling tubes to rise, so that the sampling tubes are inserted into the test tubes, thereby sampling. After the sampling is completed, the test tubes are automatically reset into the test tubes under the action of gravity. The overall operation is simple and the sampling efficiency is high.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a fluorescence spectrophotometer of the utility model;

[0022] Figure 2 for Figure 1 Schematic diagram of the rear structure;

[0023] Figure 3 for Figure 1 Schematic diagram of the sample-changing structure from an upward perspective.

[0024] Figure numerals: 1. main body; 2. controller; 3. display screen; 4. sampling tube; 5. fixing plate; 6. rotating shaft; 7. connecting rod; 8. pipe sleeve; 9. through port; 10. toothed disc; 11. tooth block; 12. locking arc; 13. conversion motor; 14. disc; 15. gear insert; 16. guide column; 17. slide plate; 18. push rod; 19. anti-slip plate; 20. lifting motor; 21. connecting shaft; 22. cam; 23. mounting plate. DETAILED DESCRIPTION

[0025] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0026] Embodiment 1

[0027] like Figure 1-Figure 3 As shown, a fluorescence spectrophotometer proposed by the utility model includes a main body 1, a sample rack and a lifting component, a controller 2 and a display screen 3 are arranged on the front, a connecting plate and a fixing plate 5 are arranged on the side, a sampling tube 4 is arranged at the bottom of the connecting plate, the sampling tube 4 is connected to the liquid pump in the main body 1, a sample rack is arranged on the fixing plate 5, and the sample rack has a sample changing mechanism for changing the sample position in the sample rack, and a lifting component aligned with the sampling tube 4 is also arranged on the fixing plate 5, and the lifting mechanism is used to lift the sample for sampling.

[0028] like Figure 1 As shown, the sample rack includes a rotating shaft 6, a connecting rod 7 and a tube sleeve 8. The rotating shaft 6 rotates and penetrates the fixed plate 5, and a connecting rod 7 is obliquely arranged on the outer side thereof. A tube sleeve 8 is arranged at one end of the connecting rod 7. Multiple groups of connecting rods 7 and tube sleeves 8 are equidistantly arranged in a circle, and a through opening 9 is opened at the bottom of the tube sleeve 8.

[0029] The test tubes are placed on the tube sleeve 8, and the sample changing mechanism drives the tube sleeve 8 to rotate, so that the test tubes are aligned with the sampling tubes 4 one by one.

[0030] like Figure 3 As shown, the sample changing mechanism includes

[0031] The toothed disc 10 is mounted at the bottom end of the rotating shaft 6, and a plurality of groups of tooth blocks 11 are arranged equidistantly on the outer side of the toothed disc 10. The outer sides of the plurality of groups of tooth blocks 11 are all provided with locking arcs 12, and an insertion gap is formed between two adjacent groups of tooth blocks 11;

[0032] A conversion motor 13 is mounted on the fixed plate 5, and an output end thereof passes through the fixed plate 5 and is connected to a disk 14, and an outer circumference of the disk 14 is matched with the locking arc 12; and

[0033] The inserting teeth 15 are arranged outside the disc 14 and are matched with the insertion gap.

[0034] Among them, during the rotation of the disc 14, the outer tooth 15 is inserted into the insertion gap as it rotates, and then drives the toothed disc 10 to rotate a certain angle, and the toothed disc 15 is disengaged from the insertion gap. At this time, the toothed disc 10 is in a relatively limited state due to the cooperation between the outer locking arc 12 and the circumference of the disc 14.

[0035] Embodiment 2

[0036] like Figure 1-Figure 3 As shown, the utility model proposes a fluorescence spectrophotometer. Based on the above embodiments, this embodiment further discloses in detail the specific structure of the lifting assembly and the lifting mechanism, as well as the connection method between the two.

[0037] like Figure 1 and Figure 3 As shown, the lifting assembly includes a guide column 16, a slide plate 17 and a push rod 18. The guide column 16 is arranged at the bottom of the fixed plate 5, and the slide plate 17 is slidably arranged on the guide column 16. The push rod 18 is arranged on the top of the slide plate 17. The push rod 18 passes through the fixed plate 5 and is symmetrically arranged with the corresponding through hole 9. A flexible rubber head is arranged on the top of the push rod 18.

[0038] like Figure 3 As shown, two groups of guide posts 16 are provided, and the bottom ends of the guide posts are connected with anti-slip plates 19 for preventing the slide plate 17 from slipping off the guide posts 16 .

[0039] like Figure 3 As shown, the lifting mechanism includes a lifting motor 20, a connecting shaft 21 and a cam 22. The side of the main body 1 is symmetrically provided with mounting plates 23. The connecting shaft 21 is rotatably provided between two groups of mounting plates 23. The connecting shaft 21 is provided with a cam 22. The outer circumference of the cam 22 abuts against the bottom of the slide plate 17. The outer side of the corresponding mounting plate 23 is provided with a lifting motor 20 connected to the connecting shaft 21.

[0040] In summary, when the utility model is in use, the samples to be tested are placed one by one into the tube sleeve 8 through the test tubes, and the conversion motor 13 and the lifting motor 20 are started. The conversion motor 13 drives the disc 14 to rotate. During the rotation of the disc 14, the inserting teeth 15 on the outside thereof are inserted into the insertion gap as the disc 14 rotates, thereby driving the toothed disc 10 to rotate a certain angle. The toothed disc 10 drives the rotating shaft 6 to rotate intermittently at a fixed angle, so that the tube sleeve 8 drives the test tubes thereon to change their positions one by one and align with the sampling tube 4. At the same time, the lifting motor 20 drives the cam 22 to rotate through the connecting shaft 21, and the cam 22 lifts the slide plate 17 upward under the limit of the guide column 16, so that the push rod 18 passes through the opening 9 of the tube sleeve 8, and the test tube is pushed out of the tube sleeve 8, and then the sampling tube 4 goes deep into the test tube, so that the liquid in the test tube can be extracted and sampled.

[0041] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A fluorescence spectrophotometer, characterized in that: include A main body (1) having a controller (2) and a display screen (3), with a sampling tube (4) and a fixing plate (5) arranged on its side; A sample rack rotatably arranged on a fixed plate (5) has a sample changing mechanism for changing the position of samples in the sample rack; and A lifting component is provided on a fixed plate (5), which has a lifting mechanism and is used for lifting and sampling samples.

2. A fluorescence spectrophotometer according to claim 1, characterized in that: The sample rack comprises a rotating shaft (6), a connecting rod (7) and a tube sleeve (8); the rotating shaft (6) rotatably penetrates the fixed plate (5), a connecting rod (7) is obliquely arranged on the outer side thereof, and a tube sleeve (8) is arranged at one end of the connecting rod (7); The connecting rods (7) and the pipe sleeves (8) are arranged in a plurality of groups at equal intervals on the circumference, and a through opening (9) is provided at the bottom of the pipe sleeve (8).

3. A fluorescence spectrophotometer according to claim 2, characterized in that: Sample replacement agencies include A toothed disc (10) is mounted on the bottom end of the rotating shaft (6), and a plurality of groups of tooth blocks (11) are arranged equidistantly on the outer side of the toothed disc (10). The outer sides of the plurality of groups of tooth blocks (11) are all provided with locking arcs (12), and an insertion gap is formed between two adjacent groups of tooth blocks (11); A conversion motor (13) is mounted on the fixing plate (5), and an output end thereof passes through the fixing plate (5) and is connected to a disk (14), wherein the outer circumference of the disk (14) is matched with the locking arc (12); and The inserting teeth (15) are arranged outside the disc (14) and are matched with the insertion gap.

4. A fluorescence spectrophotometer according to claim 2, characterized in that: The lifting assembly comprises a guide column (16), a slide plate (17) and a push rod (18); the guide column (16) is arranged at the bottom of a fixed plate (5), a slide plate (17) is slidably arranged on the guide column (16), a push rod (18) is arranged on the top of the slide plate (17), and the push rod (18) passes through the fixed plate (5) and is symmetrically arranged with the corresponding through opening (9).

5. A fluorescence spectrophotometer according to claim 4, characterized in that: The guide posts (16) are provided with two groups, and the bottom ends of the guide posts are both connected with anti-slip plates (19) for preventing the slide plate (17) from slipping off the guide posts (16).

6. A fluorescence spectrophotometer according to claim 4, characterized in that: The lifting mechanism comprises a lifting motor (20), a connecting shaft (21) and a cam (22); a mounting plate (23) is symmetrically arranged on the side of the main body (1); the connecting shaft (21) is rotatably arranged between two groups of mounting plates (23); a cam (22) is arranged on the connecting shaft (21); the outer circumference of the cam (22) abuts against the bottom of the slide plate (17); and a lifting motor (20) connected to the connecting shaft (21) is arranged on the outer side of the corresponding mounting plate (23).

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