Automatic sampling device for experimental analysis instrument

Abstract

The present invention relates to the technical field of experimental analysis instruments, and discloses an automatic sampling device for an experimental analysis instrument, which solves the problem that the existing automatic sampling device for transferring slices one by one is inconvenient to connect with the slice storage box, resulting in a cumbersome slice storage process and easy falling of slices. By controlling the movement of the adjustment handle, the scissors frame is further controlled to expand or contract, so that the spacing of the grabbing components is adjusted to adapt to slice bodies stored at different spacings. The multiple grabbing components are controlled by a control box, and can realize synchronous grabbing of the multiple slice bodies in the slice storage box, and the control box controls the multiple grabbing components to place the clamped slice bodies one by one on the conveyor belt. This not only avoids the need to manually transfer the slice bodies in the slice storage box one by one and the problem of the slice bodies falling, but also meets the work needs of the staff to detect the slice bodies one by one.

Description

Technical Field

[0001] The present invention relates to the technical field of experimental analysis instruments, in particular to an automatic sample injection device of an experimental analysis instrument. Background Art

[0002] An automatic sample introduction device is an automated device used in experimental analytical instruments. It can accurately introduce samples into the analysis system and is widely used in fields such as chromatography analysis and mass spectrometry analysis.

[0003] Existing publication number CN118330243B discloses an "automatic sample feeder for an experimental analysis instrument." The device uses the attraction between an electromagnet and a magnet block to adjust the limit plate to expand outward or reposition inward, thereby achieving a step-by-step descent of the slices. The lowest slice falls directly onto a conveyor belt and is transported to a support plate along the conveyor belt, allowing staff to directly pick it up and place it under a microscope for observation, reducing workload.

[0004] Since the slices are stored in a pathology slice storage box and are in multiple forms, when transferring slices using an existing automatic sample feeder, the multiple slices in the storage box need to be transferred one by one to the corresponding limit plates. In actual operation, there is still the problem of staff having to take out the slices one by one and the slices falling. Summary of the Invention

[0005] The purpose of the present invention is to provide an automatic sample feeding device for an experimental analysis instrument, which solves the problem that the existing automatic sample feeding device for transferring slices one by one is inconvenient to connect with the slice storage box, resulting in a cumbersome slice storage process and easy falling of slices.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: an automatic sample feeder for an experimental analysis instrument, comprising a workbench and a slice body placed in a slice storage box, a conveyor belt provided on the workbench, and a gripping mechanism provided on the workbench for simultaneously gripping multiple slice bodies in the slice storage box and releasing the slice bodies one by one on the conveyor belt;

[0007] The gripping mechanism includes an assembly cover, a plurality of gripping components for correspondingly gripping a plurality of slice bodies are provided on the lower side of the assembly cover, a control box for controlling the synchronous gripping and sequential release of the plurality of assembly covers is provided on one side of the assembly cover, and one end of the assembly cover is assembled on the workbench by rotating the turntable;

[0008] The control box controls multiple grabbing components on the lower side of the assembly cover to synchronously grab multiple slice bodies in the slice storage box, then rotates the turntable so that the grabbing components clamping multiple slice bodies are located above the conveyor belt, and then controls the multiple grabbing components through the control box to place the clamped slice bodies one by one on the conveyor belt.

[0009] As a further description of the above technical solution: a scissors frame is assembled on the lower side of the assembly cover, and the scissors frame includes a middle axis hinged in the middle and an edge axis hinged on the outside. A T-shaped slot is provided on the surface of the assembly cover, and the middle axis is restricted in movement in the middle slot of the T-shaped slot, and the two edge axes close to the turntable direction are restricted in movement in the vertical slot on one side of the T-shaped slot, and the vertical slot is perpendicular to the middle slot. An adjustment handle for adjusting the scissors frame to be retracted or extended is provided at the end of the middle axis away from the turntable direction.

[0010] As a further description of the above technical solution: a swivel is provided at one end of the edge shaft, and a slide rail is connected between the two corresponding edge shafts on both sides of the scissors frame through the corresponding swivel, and the grabbing assembly is slidably assembled on one side of the slide rail.

[0011] As a further description of the above technical solution: the grabbing assembly includes a shell slidably assembled on one side of the slide rail, a pair of clamping blocks for clamping the slice body are provided on one side of the shell, and an anti-slip pad is provided on the side of the clamping block used for clamping, and a Z-shaped plate for driving the clamping block is provided on the inner side of the shell, and a push spring is provided between the two Z-shaped plates to push them to close and separate.

[0012] As a further description of the above technical solution: the inner side of the shell is also equipped with a matching component that prompts the two Z-shaped plates to move toward each other.

[0013] As a further description of the above technical solution: the mating component includes a rotating drum rotatably assembled on the inner side of the shell, and the side of the rotating drum is provided with an arc-shaped lifting piece that pushes one end of the Z-shaped plate, and the Z-shaped plate contacts the surface of the arc-shaped lifting piece through the pushing part on one side, and the surface of the rotating drum is provided with a limit ring that limits its rotation range, and the surface of the rotating drum is fixed with a limit block A that cooperates with the limit ring, and the surface of the limit ring is also sleeved with a torsion spring that makes it have a rotation tendency, and a limit block B is fixed in the rotating drum cavity.

[0014] As a further description of the above technical solution: the control box includes a control rod movably inserted into the inner side of the rotating drum, the arc surface of the control rod is provided with a limit groove that cooperates with the limit block B, and the arc surface of the control rod is also provided with a plurality of meshing grooves.

[0015] As a further description of the above technical solution: the control box also includes a box cover, and the inner side of the box cover is provided with a rotation control component for rotating the control rod, and a movement control component for pulling and extending the control rod.

[0016] As a further description of the above technical solution, the rotation control assembly includes a gear ring that flexibly fits over the surface of the control rod. A stopper C is provided on the inner side of the gear ring, which engages with a stopper groove. A rack is provided on the underside of the gear ring to drive its rotation. A slideway is provided on the underside of the rack to guide its sliding direction. The rack is driven by an electric push rod fixedly connected to one side of the slideway. The electric push rod controls the reciprocating movement of the rack, which in turn controls the rotation of the gear ring to achieve rotational adjustment of the control rod.

[0017] As a further description of the above technical solution: the control and shift assembly includes a gear that is arranged on one side of the control rod and engages with the meshing groove; the bracket for assembling the gear is also provided with an auxiliary wheel that cooperates with the gear to clamp the control rod, and a worm wheel is coaxially fixedly connected below the gear, and a worm is provided on one side of the worm wheel to drive it, and a servo motor is provided at one end of the worm to control its rotation.

[0018] In summary, due to the adoption of the above-mentioned technical solution, the beneficial effects of the present invention are: by controlling the movement of the adjustment handle, the scissors frame is further controlled to expand or contract, so that the distance between two adjacent grabbing components can be adapted and adjusted to adapt to slice bodies stored at different distances, and multiple grabbing components are controlled by the control box, which can realize synchronous grabbing of multiple slice bodies in the slice storage box, and control the multiple grabbing components through the control box to place the clamped slice bodies one by one on the conveyor belt, which not only avoids the need to manually transfer the slice bodies in the slice storage box one by one and the problem of the slice bodies falling, but also meets the work needs of the staff to inspect the slice bodies one by one. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the grabbing mechanism and slice storage box of the present invention;

[0021] Figure 3 It is a schematic structural diagram of the grabbing mechanism of the present invention;

[0022] Figure 4 For the present invention Figure 3 A is an enlarged schematic diagram;

[0023] Figure 5 This is a schematic diagram of the internal structure of one side of the grabbing assembly of the present invention;

[0024] Figure 6 This is a schematic diagram of the internal structure of the other side of the grabbing assembly of the present invention;

[0025] Figure 7 This is a schematic diagram of the split structure of the grabbing component of the present invention;

[0026] Figure 8 It is a schematic structural diagram of the matching components of the present invention;

[0027] Figure 9 This is a schematic diagram of the control box structure of the present invention;

[0028] Figure 10 It is a schematic diagram of the internal structure of the box cover of the present invention.

[0029] In the figure: 10, workbench; 11, conveyor belt; 12, pick-up table; 20, grabbing mechanism; 21, assembly cover; 22, scissor frame; 221, middle shaft; 222, edge shaft; 223, adjustment handle; 224, swivel; 225, slide rail; 23, grab assembly; 231, housing; 232, clamping block; 2321, anti-slip pad; 233, Z-shaped plate; 2331, pushing part; 234, matching part; 2341, rotating drum; 2342, arc-shaped lifting piece; 2343, torsion spring; 2344, limit block A; 2 345. Limiting ring; 2346. Limiting block B; 235. Push spring; 24. Control box; 241. Control lever; 2411. Limiting groove; 2412. Engaging groove; 242. Box cover; 243. Rotation control assembly; 2431. Gear ring; 2432. Rack; 2433. Slide; 2434. Electric push rod; 244. Movement control assembly; 2441. Gear; 2442. Worm gear; 2443. Worm; 2444. Servo motor; 2445. Auxiliary wheel; 25. Turntable; 30. Slice body; 31. Slice storage box. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0031] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0032] Combine Figures 1-10 An automatic sample feeder for an experimental analysis instrument includes a workbench 10 and a slice body 30 placed in a slice storage box 31. A conveyor belt 11 is provided on the workbench 10 for conveying the slice body 30. The conveyor belt 11 conveys the slice body 30 to a pick-up table 12 at one end of the conveyor belt 11 for staff to pick up. The workbench 10 is provided with a grabbing mechanism 20 for simultaneously grabbing multiple slice bodies 30 in the slice storage box 31 and releasing the slice bodies 30 one by one on the conveyor belt 11.

[0033] The gripping mechanism 20 includes an assembly cover 21. A plurality of gripping assemblies 23 are provided on the lower side of the assembly cover 21 for gripping a plurality of slice bodies 30. A control box 24 is provided on one side of the assembly cover 21 for controlling the synchronous gripping and sequential release of the plurality of assembly covers 21. One end of the assembly cover 21 is rotatably mounted on the workbench 10 via a turntable 25.

[0034] The control box 24 controls the multiple grabbing components 23 on the lower side of the assembly cover 21 to synchronously grab the multiple slice bodies 30 in the slice storage box 31, and then rotates the turntable 25 so that the grabbing components 23 holding the multiple slice bodies 30 are located above the conveyor belt 11, and then controls the multiple grabbing components 23 to place the clamped slice bodies 30 one by one on the conveyor belt 11 through the control box 24. Compared with the prior art, this embodiment facilitates the simultaneous grabbing of multiple slice bodies 30 in the slice storage box 31, avoids the need to manually transfer the slice bodies 30 in the slice storage box 31 to the equipment one by one, improves the ease of operation of the device, and avoids the problem of the slice bodies 30 falling. The multiple grabbing components 23 that grab the slice bodies 30 release the slice bodies 30 one by one above the conveyor belt 11, meeting the work needs of the staff to test the slice bodies 30 one by one; the present invention is applied to experimental analysis instruments, and by reducing the transfer time of the slice bodies 30, the total time for testing a batch of slice bodies 30 is indirectly shortened. This improvement significantly reduces potential changes in the slice body 30 caused by prolonged exposure or manipulation during the detection process (such as deformation of tissue structure, reduction in antigen activity, or changes in chemical properties). The reduction of these changes helps maintain the original characteristics of the slice body, thereby significantly improving the accuracy and reliability of experimental detection.

[0035] Combine Figure 2-Figure 4 A scissors frame 22 is assembled on the lower side of the assembly cover 21. The scissors frame 22 includes a middle axis 221 hinged in the middle and an edge axis 222 hinged on the outside. A T-shaped slot is provided on the surface of the assembly cover 21. The middle axis 221 is restricted in movement in the middle slot of the T-shaped slot. The two edge axes 222 close to the turntable 25 are restricted in movement in the vertical slot on one side of the T-shaped slot. The vertical slot is perpendicular to the middle slot. An adjustment handle 223 for adjusting the scissors frame 22 to be retracted or extended is provided at one end of the middle axis 221 away from the turntable 25.

[0036] A swivel 224 is provided at one end of the edge shaft 222, and a slide rail 225 is connected between the two corresponding edge shafts 222 on both sides of the scissors frame 22 through the corresponding swivel 224. The grabbing component 23 is slidably assembled on one side of the slide rail 225, and the grabbing component 23 slides with resistance on one side of the slide rail 225.

[0037] Specifically, by controlling the movement of the adjustment handle 223, the scissors frame 22 can be further controlled to expand or contract, wherein the adjacent spacing of the multiple slide rails 225 provided on one side of the scissors frame 22 will increase or decrease accordingly, which can further change the spacing of the grabbing components 23 assembled on one side of the adjacent slide rails 225. In response to different models of slice storage boxes 31 resulting in a variety of different spacings of slice bodies 30 stored therein, by adapting and adjusting the spacing of the grabbing components 23, it can effectively adapt to slice bodies 30 stored at different spacings, which effectively improves the scope of application of the present invention.

[0038] Combine Figure 4-Figure 8 The grabbing assembly 23 includes a shell 231 slidably assembled on one side of the slide rail 225. A pair of clamping blocks 232 for clamping the slice body 30 are provided on one side of the shell 231. A non-slip pad 2321 is provided on the side of the clamping block 232 for clamping. A Z-shaped plate 233 driving the clamping block 232 is provided on the inner side of the shell 231. A push spring 235 is provided between the two Z-shaped plates 233 to push them to close and separate. Under normal circumstances, the clamping blocks 232 corresponding to one side of the two Z-shaped plates 233 are in a separated state due to the push of the push spring 235.

[0039] The housing 231 is further provided with a matching component 234 that causes the two Z-shaped plates 233 to move toward each other. Under normal circumstances, the matching component 234 does not act on the Z-shaped plates 233 , and the pair of clamping blocks 232 remain separated.

[0040] The mating component 234 includes a rotating drum 2341 rotatably mounted on the inner side of the housing 231. The side of the rotating drum 2341 is provided with an arc-shaped lifting piece 2342 that pushes one end of the Z-shaped plate 233. The Z-shaped plate 233 contacts the surface of the arc-shaped lifting piece 2342 through the pushing portion 2331 on one side. Figure 8As shown, there are two arc-shaped lifting pieces 2342 symmetrically provided, and the two ends of the arc-shaped lifting pieces 2342 are set at different heights. When controlling the rotation of the rotating cylinder 2341, when the upper end of the arc-shaped lifting piece 2342 moves to the upper surface of the pushing part 2331, the Z-shaped plate 233 is at the upper side, so that the corresponding pair of clamping blocks 232 are in an open state. When the lower end of the arc-shaped lifting piece 2342 moves to the upper surface of the pushing part 2331, the Z-shaped plate 233 is at the lower side, prompting the pair of clamping blocks 232 to be in a clamped state. A limiting ring 2345 is provided on the surface of the rotating cylinder 2341 to limit its rotation range, and a fixed member cooperating with the limiting ring 2345 is provided on the surface of the rotating cylinder 2341. The limit block A2344, through the limiting action of the limit ring 2345, makes the rotation range of the rotating drum 2341 correspond to the covering angle of the arc-shaped lifting piece 2342, so that the arc-shaped lifting piece 2342 and the pushing part 2331 always maintain effective contact. The surface of the limit ring 2345 is also provided with a torsion spring 2343 to give it a rotation tendency. The elastic potential energy of the torsion spring 2343 is greater than the elastic potential energy of the push spring 235 to push the Z-shaped plate 233, so that the rotating drum 2341 is not affected by external force, and the high point of the arc-shaped lifting piece 2342 on its surface contacts the pushing part 2331, so that the clamping block 232 is in an open state, and a limit block B2346 is fixed in the cavity of the rotating drum 2341.

[0041] The control box 24 includes a control rod 241 movably inserted into the inner side of the rotating drum 2341 . A limiting groove 2411 cooperating with the limiting block B2346 is provided on the arc surface of the control rod 241 . A plurality of meshing grooves 2412 are also arranged on the arc surface of the control rod 241 .

[0042] Specifically, the control rod 241 is inserted into the inner side of the rotating drum 2341 of the plurality of grabbing assemblies 23 to synchronously control the plurality of grabbing assemblies 23. The rotation of the control rod 241 drives the plurality of rotating drums 2341 to rotate, so that the arc-shaped lifting pieces 2342 on the surface of the rotating drums 2341 push the corresponding contacting Z-shaped plates 233 to merge. At this time, the synchronous clamping of the plurality of slice bodies 30 is completed. When it is necessary to gradually loosen the clamping of the plurality of grabbing assemblies 23 on one side, the control rod 241 is pulled away from the inner side of the rotating drum 2341. Under the limiting action of 2341, the rotating drum 2341 is elastically driven by the torsion spring 2343 to rotate and reset. As the arc-shaped lifting piece 2342 also rotates and resets, the push spring 235 will push the Z-shaped plate 233 to reset. At this time, the clamping block 232 releases the clamping of the slice body 30, and the slice body 30 can be smoothly placed on the conveyor belt 11; through the cooperation of the above implementation, it is possible to simultaneously grab multiple slice bodies 30 in the slice storage box 31, and to meet the process of multiple grabbing components 23 releasing the slice bodies 30 one by one above the conveyor belt 11.

[0043] Combine Figure 5 、 Figure 9-10The control box 24 also includes a box cover 242 , and a rotation control component 243 for rotating the control rod 241 and a movement control component 244 for pulling and extending the control rod 241 are provided on the inner side of the box cover 242 .

[0044] The rotation control assembly 243 includes a gear ring 2431 that slidably fits over the surface of the control rod 241. A stopper C (not shown in the figure, but the connection principle is the same as that of the rotating drum 2341) is provided on the inner side of the gear ring 2431 and cooperates with the limit groove 2411. A rack 2432 is provided on the underside of the gear ring 2431 to drive it in rotation. A slideway 2433 is provided on the underside of the rack 2432 to guide its sliding direction. The rack 2432 is driven by an electric push rod 2434 fixedly connected to one side of the slideway 2433. The electric push rod 2434 controls the reciprocating movement of the rack 2432, which in turn controls the rotation of the gear ring 2431 to achieve rotational adjustment of the control rod 241.

[0045] The control assembly 244 includes a gear 2441 disposed on one side of the control rod 241, meshing with a meshing groove 2412. When the control rod 241 rotates, the meshing groove 2412 and the gear 2441 remain in meshing relationship. A bracket for assembling the gear 2441 also includes an auxiliary wheel 2445 that cooperates with the gear 2441 to clamp the control rod 241, thereby tightening the meshing relationship between the gear 2441 and the control rod 241. A worm gear 2442 is coaxially fixedly connected below the gear 2441. A worm 2443 is provided on one side of the worm gear 2442 to drive it. A servo motor 2444 is provided at one end of the worm gear 2443 to control its rotation. The servo motor 2444 controls the rotation of the worm gear 2443, causing the rotating worm gear 2442 to drive the gear 2441, further controlling the forward and backward movement of the control rod 241 along its length. A clearance hole is provided on one side of the turntable 25 for the control rod 241 to pass through.

[0046] Working principle: Turn the assembly cover 21 to the upper side of the slice storage box 31, then adjust the position of the grabbing assembly 23, and further control the scissors frame 22 to expand or contract, so as to adjust the spacing of the grabbing assembly 23 to adapt to the spacing of the slice bodies 30 stored in the slice storage box 31, and then control the assembly cover 21 to descend or the slice storage box 31 to rise (the lower side of the assembly cover 21 is provided with an electric push rod (not shown in the figure) to push it up and down, or the lower side of the slice storage box 31 is provided with a lifting platform (not shown in the figure) to push it up and down), so that multiple slice bodies 30 enter the initial state inside the opened grabbing assembly 23, and then the control rod 241 is controlled to rotate a certain angle by the control rotation assembly 243 to control multiple grabbing assemblies 23 to be opened and closed. The components 23 clamp a plurality of slice bodies 30, and then the assembly cover 21 is rotated above the conveyor belt 11, so that the slice bodies 30 clamped by the grabbing components 23 are located on the upper side of the conveyor belt 11, and then the control rod 241 is controlled by the control shift component 244 to move toward the turntable 25, wherein the grabbing components 23 away from the turntable 25 will be separated from the control rod 241 in turn, and the clamping block 232 of the grabbing component 23 after being separated from the control rod 241 will automatically reset and release the clamping of the slice body 30, so that the slice body 30 automatically falls onto the surface of the conveyor belt 11, so that the conveyor belt 11 is transmitted to the picking table 12, so that the staff can inspect the slice bodies 30 one by one.

[0047] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An automatic sample feeding device for an experimental analysis instrument, comprising a workbench (10), and a slice body (30) placed in a slice storage box (31), a conveyor belt (11) being provided on the workbench (10), and characterized in that: The workbench (10) is provided with a grabbing mechanism (20) for simultaneously grabbing a plurality of slice bodies (30) in a slice storage box (31) and releasing the slice bodies (30) one by one on the conveyor belt (11); The gripping mechanism (20) includes an assembly cover (21), a plurality of gripping components (23) for correspondingly gripping a plurality of slice bodies (30) are provided on the lower side of the assembly cover (21), a control box (24) for controlling the synchronous gripping and sequential release of the plurality of assembly covers (21) is provided on one side of the assembly cover (21), and one end of the assembly cover (21) is rotatably assembled on the workbench (10) via a turntable (25); The control box (24) controls the multiple grabbing assemblies (23) on the lower side of the assembly cover (21) to synchronously grab the multiple slice bodies (30) in the slice storage box (31), and then rotates the turntable (25) so that the grabbing assemblies (23) holding the multiple slice bodies (30) are located above the conveyor belt (11), and then the control box (24) controls the multiple grabbing assemblies (23) to sequentially place the clamped slice bodies (30) one by one on the conveyor belt (11); A scissor frame (22) is assembled on the lower side of the assembly cover (21), and the scissor frame (22) includes a middle shaft (221) hinged in the middle and an edge shaft (222) hinged on the outside. A T-shaped slot is provided on the surface of the assembly cover (21), and the middle shaft (221) is restricted in the middle slot of the T-shaped slot. The two edge shafts (222) close to the turntable (25) are restricted in the vertical slot on one side of the T-shaped slot. The vertical slot is perpendicular to the middle slot. An adjustment handle (223) for adjusting the scissor frame (22) to be retracted or extended is provided at one end of the middle shaft (221) away from the turntable (25). A rotating ring (224) is provided at one end of the edge shaft (222), and a slide rail (225) is connected between two corresponding edge shafts (222) on both sides of the scissor frame (22) via corresponding rotating rings (224), and the grabbing assembly (23) is slidably assembled on one side of the slide rail (225); The grabbing assembly (23) comprises a housing (231) slidably mounted on one side of a slide rail (225); a pair of clamping blocks (232) for clamping the slice body (30) are provided on one side of the housing (231); a non-slip pad (2321) is provided on one side of the clamping blocks (232); a Z-shaped plate (233) for driving the clamping blocks (232) is provided on the inner side of the housing (231); and a push spring (235) is provided between the two Z-shaped plates (233) to push them into a closing or separating trend.

2. The automatic sample introduction device of an experimental analysis instrument according to claim 1, characterized in that: The inner side of the housing (231) is also equipped with a matching component (234) that causes the two Z-shaped plates (233) to move toward each other.

3. The automatic sample introduction device of an experimental analysis instrument according to claim 2, characterized in that: The matching component (234) includes a rotating cylinder (2341) rotatably assembled on the inner side of the shell (231); the side of the rotating cylinder (2341) is provided with an arc-shaped lifting piece (2342) for pushing one end of the Z-shaped plate (233); the Z-shaped plate (233) contacts the surface of the arc-shaped lifting piece (2342) through the pushing portion (2331) on one side; the surface of the rotating cylinder (2341) is provided with a limiting ring (2345) for limiting its rotation range; the surface of the rotating cylinder (2341) is fixedly provided with a limiting block A (2344) that cooperates with the limiting ring (2345); the surface of the limiting ring (2345) is also sleeved with a torsion spring (2343) that makes it have a rotation tendency; and the cavity of the rotating cylinder (2341) is fixedly provided with a limiting block B (2346).

4. The automatic sample introduction device of an experimental analysis instrument according to claim 3, characterized in that: The control box (24) includes a control rod (241) movably inserted into the inner side of the rotating drum (2341). The arc surface of the control rod (241) is provided with a limit groove (2411) that cooperates with the limit block B (2346). The arc surface of the control rod (241) is also provided with a plurality of meshing grooves (2412).

5. The automatic sample introduction device of an experimental analysis instrument according to claim 4, characterized in that: The control box (24) further comprises a box cover (242), the inner side of which is provided with a rotation control assembly (243) for rotating the control rod (241), and a movement control assembly (244) for pulling and extending the control rod (241).

6. The automatic sample introduction device of an experimental analysis instrument according to claim 5, characterized in that: The rotation control assembly (243) includes a gear ring (2431) movably sleeved on the surface of the control rod (241), a limit block C is provided on the inner side of the gear ring (2431) and cooperates with the limit groove (2411), a rack (2432) is provided on the lower side of the gear ring (2431) to drive it to rotate, and a slideway (2433) is provided on the lower side of the rack (2432) to guide its sliding direction, and the rack (2432) is driven by an electric push rod (2434) fixedly connected to one side of the slideway (2433), and the electric push rod (2434) controls the reciprocating movement of the rack (2432), and further controls the rotation of the gear ring (2431), so as to realize the rotation adjustment of the control rod (241).

7. The automatic sample introduction device of an experimental analysis instrument according to claim 6, characterized in that: The control and shift assembly (244) includes a gear (2441) disposed on one side of the control rod (241) and meshing with the meshing groove (2412); a bracket for assembling the gear (2441) is further provided with an auxiliary wheel (2445) cooperating with the gear (2441) to clamp the control rod (241); a worm wheel (2442) is coaxially fixedly connected below the gear (2441); a worm (2443) is disposed on one side of the worm wheel (2442) for driving the worm wheel; and a servo motor (2444) is disposed at one end of the worm wheel (2443) for controlling its rotation.

Images