Testing device based on food nutritional ingredient analysis

Abstract

The invention discloses a testing device based on food nutritional ingredient analysis, the testing device comprises a machine body, a test tube, a rubber sleeve and a sample injector, the outer side of a stand column is rotatably sleeved with a rotary sleeve, and the outer end of the rotary sleeve is fixedly provided with a frame disc; a clamping arm is slidably connected to the top of the frame disc, a driving part is arranged at the top of the machine body, a guide structure is arranged on the stand column, and a transmission part is arranged on the outer side of the rotary sleeve; a linkage piece is arranged on the guide block, and a pressing piece is arranged on the outer side of the stand column. According to the invention, firstly, through cooperative arrangement of the guide structure and the linkage part, automatic clamping of the test tubes is realized, and the test tubes can be kept in a stable rack state relative to the rack disc when a subsequent sampling needle enters and exits a rubber sleeve, secondly, the guide block is controlled by the compression part to slide back and forth along the rack disc to drive the two test tubes which are not detected to swing back and forth, so that the test tubes are not detected. The components in the standing sample solution are uniformly distributed along with the shaking of the test tube, so that the accuracy of a detection result is improved.

Description

Technical Field

[0001] The invention relates to the technical field of food nutrition testing, and in particular to a testing device based on food nutrition component analysis. Background Art

[0002] Food nutritional analysis is the process of evaluating the types and amounts of nutrients contained in food, which is very important for food production, quality control, nutrition labeling, and consumers' understanding of the nutritional value of food.

[0003] Liquid chromatography plays an important role in the analysis of food nutritional components. Its working principle is based on the differences in interactions between the mobile phase and the stationary phase of each component in the sample to achieve separation and detection. It can not only provide accurate analysis results, but also detect various components with different properties through different detectors and chromatographic columns.

[0004] In the prior art, a sampler is usually arranged on the top of the instrument, and a turntable is provided for carrying multiple groups of food samples. Users usually put the sample tubes directly into the slots of the turntable. During testing, the food samples at the bottom of the sampler are switched by controlling the rotation of the turntable to meet the requirements of the extraction and testing of grouped food samples.

[0005] In order to ensure that dust does not fall into the sample test tube while the extracted food sample solution is waiting for testing, a rubber sleeve that is easily pierced by the injection needle is usually used to seal the test tube mouth, and to ensure that the outer wall of the injection needle does not adhere to the solution when the injection needle is pulled out of the test tube, there is usually a certain friction resistance between the rubber sleeve and the injection needle. When the injection needle is pulled out of the test tube, the solution adhered to the outer wall of the injection needle is scraped off. It is precisely because of the existence of friction resistance and the weight of the sample in the test tube decreases after being extracted that when the injection needle is pulled out of the test tube, the test tube is prone to fall out of the slot as the injection needle moves vertically, and when the sample in the test tube is stationary waiting for testing, the internal components are unevenly distributed, which is not conducive to the accuracy of the test results.

[0006] Based on the problem of uneven distribution of internal components of the sample when it is at rest, in the prior art, according to patent application number: CN202322059341.3, a purine content detection device for low-purine food based on liquid chromatography provides a solution for placing a box by driving a push plate to reciprocate through a reciprocating screw rod, and then shaking the reagent bottles inside the placing box when the box swings back and forth.

[0007] However, in the solution provided by the comparative document, the placement box for the reagent bottles cannot be switched relative to the liquid chromatograph body, so the reagent bottles to be extracted and tested cannot be shaken in order according to the detection order of the reagent bottles. When facing the extraction and detection of multiple groups of food samples, the user needs to first control the drive machine to pause the reciprocating drive of the placement box, and then release the clamping state of the reagent bottle by stretching the movable rod, and then take the reagent bottle out of the placement box and send it to the extraction station of the sampler to realize the detection of the sample in the reagent bottle. This operation method has the problem of cumbersome operation and low efficiency when facing the detection of multiple groups of samples. In addition, the comparative document uses the elastic pressure force provided by the spring to realize the swinging rack of the reagent bottle with the placement box, which is not conducive to the safe shaking of the reagent bottle.

[0008] In view of the above-mentioned defects, a testing device based on food nutritional component analysis is provided. Summary of the invention

[0009] The purpose of the present invention is to solve the above-mentioned problem and to provide a testing device based on food nutritional component analysis.

[0010] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: a testing device based on food nutritional component analysis, comprising a body, a test tube, a rubber cover placed on the test tube and an injector installed on the body, a column is fixedly arranged on the top of the body, a rotating sleeve is arranged on the outer rotating sleeve of the column, a frame plate is fixedly arranged on the outer end of the rotating sleeve, and a plurality of opening grooves for fitting the test tube are arranged in the circumferential direction in the frame plate; The top of the frame is fixedly provided with a support block for matching the rubber sleeve, the top of the frame is slidably connected with a clamping arm for matching the test tube clamping, the top of the body is provided with a driving member for controlling the rotation of the rotary sleeve, a slider is slidably embedded in the rotary sleeve, a guide structure for driving the slider to move vertically relative to the rotary sleeve is provided on the column, a transmission member is provided on the outer side of the rotary sleeve, and the slider adjusts the clamping state of the clamping arm on the test tube through the transmission member when moving vertically; The top of the rack is slidably connected with a guide block corresponding to the clamp arm, and a linkage is provided on the guide block. A pressure piece is provided on the outer side of the column to drive the guide block to reciprocate radially along the rack. When the guide block reciprocates, the clamp arm is controlled by the linkage to swing the test tube back and forth.

[0011] Preferably, the driving member includes a shell cover fixed on the machine body, the rotary sleeve passes through the shell cover and is rotatably connected to the shell cover, a gear disk is rotatably connected in the shell cover, a driving motor for controlling the rotation of the gear disk is installed on the top of the shell cover, and teeth that engage with the gear disk are formed on the side wall of the rotary sleeve.

[0012] Preferably, the guide structure includes a slide groove formed in the rotary sleeve to cooperate with the vertical sliding of the slider, a guide rod is fixed to the inner end of the slider, and a slideway cooperating with the sliding of the guide rod is formed on the side wall of the column, and the slideway is composed of an annular groove and a corrugated groove.

[0013] Preferably, the transmission member comprises a sliding frame penetrating and sliding in the frame plate, and a component driving the sliding frame to slide. A sliding sleeve is fixedly disposed at one opposite end of the two clamping arms, and the sliding sleeve is rotatably connected to the sliding frame.

[0014] Preferably, the component that drives the sliding frame to slide includes a bracket fixed to the bottom of the frame plate, a swivel shaft rotatably connected to the inner side of the bracket, and a joint for controlling the rotation of the swivel shaft. The swivel shaft slides through the sliding frame, a protrusion is formed on the inner wall of the sliding frame, and a sliding rail that cooperates with the protrusion to slide is formed on the side wall of the swivel shaft.

[0015] Preferably, the components for controlling the rotation of the rotating shaft include a driven wheel fixed coaxially with the rotating shaft, a driving wheel rotatably connected to the bottom of the frame plate through a frame plate, and a telescopic structure for controlling the rotation of the driving wheel, and a chain is provided on the outer engaging sleeves of the driving wheel and the driven wheel.

[0016] Preferably, the telescopic structure comprises a swing arm rotatably connected to the outside of the slider, a sliding arm coaxially fixed to the outside of the driving wheel, and the sliding arm is slidably connected to the swing arm.

[0017] Preferably, the linkage comprises a transmission arm coaxially fixed on the shaft, the free end of the transmission arm is rotatably connected to the guide block, the shaft slides through the sliding frame, the sliding sleeve and the clamping arm, and the sliding sleeve and the shaft are slidably engaged via a spline.

[0018] Preferably, the pressure member includes a toothed disk rotatably connected to the outside of the column, a magnetic block for magnetically attracting the guide block is fixedly provided on the side end of the toothed disk, a shielding cover is fixedly provided on the top of the column through a frame rod, a slot is penetrated through the side of the shielding cover, a reciprocating driving mechanism for controlling the reciprocating rotation of the rotating ring is provided on the shielding cover, and an elastic component for driving the guide block to slide and reset is provided in the frame.

[0019] Preferably, the elastic component includes a strip groove formed on the top of the frame plate to cooperate with the sliding of the guide block, a cross bar sliding through the guide block is fixed in the strip groove, and a compression spring is sleeved on the outer side of the cross bar to radially press the guide block outward.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present application, the guide structure and the linkage are arranged in coordination, so that the clamping arm can automatically clamp the test tube when the rack is rotated away from the loading and unloading station, which is beneficial for the test tube to maintain a stable racking state relative to the rack when the subsequent sampling needle enters and exits the rubber sleeve. The operation of the automatic clamping structure does not rely on electric control, and multiple test tubes can be clamped and fixed during the rotation of the rack, thereby achieving the purpose of reducing equipment investment costs and simplifying equipment operation procedures.

[0021] 2. In the present application, the guide block is controlled to slide back and forth along the frame plate by the pressure piece. At this time, the clamping arm corresponding to the guide block will drive the two test tubes that have not been tested to swing back and forth under the action of the linkage piece, so that the sample solution that has been left to stand for a certain period of time will have its components evenly distributed as the test tubes swing, which is beneficial to improving the accuracy of the test results.

[0022] 3. In the present application, the rotation of the rotary sleeve is controlled by a driving member, so that the rack will switch the test tubes facing the bottom of the injector one by one, and the test tubes will be automatically clamped and shaken when they are close to the injector, which not only meets the continuous and efficient detection of batch samples, but also facilitates the safe and convenient test tube shaking operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the three-dimensional structure of a testing device provided in an embodiment of the present invention is shown; Figure 2 A schematic diagram of the top view of the testing device provided in an embodiment of the present invention is shown; Figure 3 A cross-sectional schematic diagram of a rack provided according to an embodiment of the present invention is shown; Figure 4 A schematic diagram of the matching structure of the clamp arm and the shaft rod, and the swivel shaft and the sliding frame provided according to an embodiment of the present invention is shown; Figure 5 An exploded schematic diagram of the internal structure of a rotary sleeve provided in an embodiment of the present invention is shown; Figure 6 A schematic exploded view of the internal structure of a driving wheel provided according to an embodiment of the present invention is shown.

[0024] Legend: 1. Machine body; 2. Sample injector; 3. Column; 301. Slideway; 4. Rotary sleeve; 401. Slideway; 5. Rack plate; 6. Opening slot; 7. Test tube; 8. Rubber sleeve; 9. Support block; 10. Bracket; 11. Rotary shaft; 12. Slide rail; 13. Sliding frame; 14. Protrusion; 15. Clamp arm; 16. Slide sleeve; 17. Shaft rod; 18. Transmission arm; 19. Guide block; 20. Cross bar; 21. Compression spring; 22. Driven wheel; 23. Driving wheel; 24. Chain; 25. Slide arm; 26. Sliding block; 27. Swing arm; 28. Guide rod; 29. ​​Toothed disc; 30. Driving motor; 31. Shell cover; 32. Rotary ring; 33. Magnetic block; 34. Shielding cover; 35. Notch; 36. Reciprocating drive mechanism. DETAILED DESCRIPTION

[0025] 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 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 creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-6 The present invention provides a technical solution: a testing device based on food nutritional component analysis, comprising a body 1, a test tube 7, a rubber sleeve 8 covering the test tube 7 and an injector 2 installed on the body 1, a column 3 is fixedly provided on the top of the body 1, a rotary sleeve 4 is rotatably sleeved on the outer side of the column 3, a frame plate 5 is fixedly provided at the outer end of the rotary sleeve 4, and a plurality of opening grooves 6 for fitting the test tube 7 are circumferentially arranged in the frame plate 5.

[0027] The test tube 7 is used to hold a solution sample for extracting food nutrients, the rubber sleeve 8 is used to seal the opening at the top of the test tube 7, the injector 2 is an existing device used in conjunction with the body 1, and the injection needle of the injector 2 extracts the sample solution in the test tube 7 after piercing the rubber sleeve 8, and then injects it into the body 1.

[0028] Body 1 is a liquid chromatograph in the prior art. After the sample solution is introduced into the mobile phase, the mobile phase (liquid) passes through the chromatographic column at a constant flow rate, carrying each component in the sample through the chromatographic column. The chromatographic column is filled with a stationary phase, which is a substance with different chemical properties from the mobile phase. Different components in the sample move at different speeds in the chromatographic column according to their different interaction strengths with the stationary phase, thereby achieving separation. The separated components flow out of the chromatographic column with the mobile phase, are detected and generate signals when passing through the detector, and the signals of the detector are recorded as a chromatogram. The peaks in the figure represent different components, and the size of the peaks is related to the amount of the components, thereby obtaining the content of each nutritional component in the food sample.

[0029] A support block 9 for cooperating with the rubber sleeve 8 is fixedly provided on the top of the rack 5, and a clamping arm 15 for clamping the test tube 7 is slidably connected to the top of the rack 5. A driving member for controlling the rotation of the rotary sleeve 4 is provided on the top of the body 1. A slider 26 is slidably embedded in the rotary sleeve 4. A guide structure for driving the slider 26 to move vertically relative to the rotary sleeve 4 is provided on the column 3. A transmission member is provided on the outer side of the rotary sleeve 4. When the slider 26 moves vertically, the clamping state of the clamping arm 15 on the test tube 7 is adjusted through the transmission member.

[0030] The rotary sleeve 4 is controlled to rotate by a driving member, so that the rack 5 fixed to the rotary sleeve 4 switches the test tube 7 facing the bottom of the sample injector 2, thereby meeting the continuous and efficient detection of batch samples.

[0031] The clamping arms 15 are distributed on both sides of the support block 9. When the clamping arms 15 move in opposite directions, the outer wall of the test tube 7 will be pressed by the inner wall thereof. A loading and unloading station for replacing the test tube 7 in the rack 5 is set on the machine body 1. The specific loading and unloading method can be an existing automatic manipulator or a manual operation method. When the slider 26 corresponding to the clamping arm 15 turns to the loading and unloading station with the rotary sleeve 4, the slider 26 will move downward along the rotary sleeve 4 under the action of the guide structure. At this time, the clamping arm 15 corresponding to the slider 26 will automatically open under the action of the linkage member to release the clamping state of the test tube 7 that has completed the sample inspection. At this time, the user can take the test tube 7 out of the open groove 6 and load a new group of test tubes 7 into the open groove 6 as needed. As the rack 5 rotates, the slider 26 will move upward along the rotary sleeve 4 under the action of the guide structure when it turns away from the loading and unloading station. At this time, the clamping arm 15 will clamp the test tube 7 in the opposite direction under the action of the linkage member. By coordinating the guide structure and the linkage, the clamping arm 15 can automatically clamp the test tube 7 when the rack 5 rotates away from the loading and unloading station. The operation of the automatic clamping structure does not rely on electric control, so it can clamp and fix multiple test tubes 7 during the rotation of the rack 5, thereby reducing the equipment investment cost and simplifying the equipment operation procedure.

[0032] By clamping the test tube 7 , it is beneficial for the subsequent clamping and swinging of the test tube 7 by the clamping arm 15 , and it is beneficial for the test tube 7 to be stably placed relative to the rack 5 when the injection needle enters and exits the rubber sleeve 8 .

[0033] The top of the rack 5 is slidably connected with a guide block 19 corresponding to the clamp arm 15, and a linkage is provided on the guide block 19. The outer side of the column 3 is provided with a pressure piece that drives the guide block 19 to reciprocate radially along the rack 5. When the guide block 19 reciprocates, the clamp arm 15 is controlled by the linkage to swing the test tube 7 back and forth.

[0034] The two guide blocks 19 near the sample injector 2 are controlled by the pressure piece to slide back and forth along the rack 5. At this time, the clamping arms 15 corresponding to the guide blocks 19 will drive the two test tubes 7 that have not been tested to swing back and forth under the action of the linkage piece, so that the sample solution that has been left to stand for a certain period of time will have its components evenly distributed as the test tubes 7 swing, which is beneficial to improving the accuracy of the test results.

[0035] Specifically, Figure 3 As shown, the driving member includes a shell cover 31 fixed on the body 1, the rotary sleeve 4 passes through the shell cover 31 and is rotatably connected to the shell cover 31, a toothed disc 29 is rotatably connected in the shell cover 31, a driving motor 30 for controlling the rotation of the toothed disc 29 is installed on the top of the shell cover 31, and a toothed disc 29 is formed on the side wall of the rotary sleeve 4. The driving motor 30 is started to control the gear disc 29 to rotate, so that the rotating sleeve 4 meshing with the gear disc 29 drives the frame disc 5 to rotate, thereby realizing the switching of the position of the test tube 7.

[0036] Specifically, Figure 3 and Figure 5 As shown, the guide structure includes a slide groove 401 formed in the rotary sleeve 4 for cooperating with the slider 26 for vertical sliding. A guide rod 28 is fixed to the inner end of the slider 26. A slideway 301 for cooperating with the guide rod 28 for sliding is formed on the side wall of the column 3. The slideway 301 is composed of an annular groove and a corrugated groove.

[0037] When the rotary sleeve 4 rotates along the column 3, the guide rod 28 fixed on the slider 26 will slide along the slide 301. When the guide rod 28 slides along the annular groove of the slide 301, the vertical position of the slider 26 relative to the rotary sleeve 4 will not change. When the test tube 7 turns to the loading and unloading station as the rack 5 rotates, the corresponding guide rod 28 will slide along the slide 301 to the crest of the corrugated groove. At this time, the slider 26 will slide upward along the slide groove 401, and the clamping arm 15 will release the test tube 7.

[0038] When the test tube 7 moves away from the loading and unloading station as the rack 5 rotates, the corresponding guide rod 28 will slide from the corrugated groove to the annular groove. During this process, the slider 26 fixed to the guide rod 28 will slide downward along the slide groove 401, and the clamp arm 15 will clamp the test tube 7.

[0039] Specifically, Figure 3 and Figure 4 As shown, the transmission member includes a sliding frame 13 that penetrates and slides in the frame plate 5, and a component that drives the sliding frame 13 to slide. A sliding sleeve 16 is fixedly disposed at the opposite end of the two clamping arms 15, and the sliding sleeve 16 is rotatably connected to the sliding frame 13.

[0040] When the sliding frame 13 slides, the sliding sleeve 16 rotatably connected thereto drives the clamping arms 15 to move relatively, thereby clamping or loosening the test tube 7 by the clamping arms 15 . An arc-shaped notch adapted to the side wall of the test tube 7 is formed at the opposite ends of the two clamping arms 15 .

[0041] The components that drive the sliding frame 13 to slide include a bracket 10 fixed to the bottom of the frame plate 5, a rotating shaft 11 rotatably connected to the inner side of the bracket 10, and a joint for controlling the rotation of the rotating shaft 11. The rotating shaft 11 slides through the sliding frame 13. A protrusion 14 is formed on the inner wall of the sliding frame 13, and a sliding rail 12 that cooperates with the protrusion 14 to slide is formed on the side wall of the rotating shaft 11.

[0042] When the rotating shaft 11 rotates, the protrusion 14 is pressed and driven by the spiral inner wall of the slide rail 12 , so that the sliding frame 13 fixed to the protrusion 14 is driven to slide along the rotating shaft 11 .

[0043] The components for controlling the rotation of the rotating shaft 11 include a driven wheel 22 fixed coaxially with the rotating shaft 11, a driving wheel 23 rotatably connected to the bottom of the frame plate 5 through a frame plate, and a telescopic structure for controlling the rotation of the driving wheel 23, and a chain 24 is provided on the outer meshing sleeves of the driving wheel 23 and the driven wheel 22; the telescopic structure includes a swing arm 27 rotatably connected to the outer side of the slider 26, a sliding arm 25 coaxially fixed to the outer side of the driving wheel 23, and the sliding arm 25 is slidably connected to the swing arm 27.

[0044] When the slider 26 slides vertically along the rotary sleeve 4, the swing arm 27 connected to the slider 26 rotates to drive the driving wheel 23 coaxially fixed with the slider 25 to rotate. In this process, due to the change in the distance between the slider 26 and the driving wheel 23, the slider 25 will slide telescopically along the swing arm 27. When the driving wheel 23 rotates, the driven wheel 22 will rotate synchronously with the driving wheel 23 under the action of the chain 24, thereby driving the rotating shaft 11 coaxially fixed with the driven wheel 22 to rotate.

[0045] Specifically, Figure 1-4 As shown, the linkage includes a transmission arm 18 coaxially fixed on the shaft 17, the free end of the transmission arm 18 is rotatably connected to the guide block 19, the shaft 17 slides through the sliding frame 13, the sliding sleeve 16 and the clamping arm 15, and the sliding sleeve 16 and the shaft 17 are slidably matched by splines.

[0046] The transmission arm 18 is composed of two sections of arm rods connected in rotation. When the guide block 19 slides back and forth along the frame plate 5, the transmission arm 18 will slide along the guide block 19, stretch and fold back and forth, and then drive the shaft rod 17 coaxially fixed with the transmission arm 18 to rotate. When the shaft rod 17 rotates, the sliding sleeve 16 will drive the clamping arm 15 to rotate synchronously with the shaft rod 17 under the action of the spline, and at this time, the test tube 7 clamped by the clamping arm 15 is shaken to evenly mix the food sample.

[0047] Specifically, Figure 3 and Figure 6 As shown, the pressure member includes a toothed disc 29 rotatably connected to the outside of the column 3, a magnetic block 33 for magnetically attracting the guide block 19 is fixedly provided at the side end of the toothed disc 29, a shielding cover 34 is fixedly provided on the top of the column 3 through a frame rod, a slot 35 is penetrated through the side of the shielding cover 34, a reciprocating driving mechanism 36 for controlling the reciprocating rotation of the rotating ring 32 is provided on the shielding cover 34, and an elastic component for driving the guide block 19 to slide and reset is provided in the frame plate 5.

[0048] By setting the slot 35, the magnetic force of the magnetic block 33 passes through the slot 35 and acts on the guide block 19 located outside the slot 35, and the opening angle of the slot 35 is adapted to the concentric angle of the two guide blocks 19. When the magnetic block 33 reciprocates with the rotating ring 32, it can alternately act on the two guide blocks 19.

[0049] The guide block 19 is made of iron-containing material. When the rotating ring 32 drives the magnetic block 33 to swing back and forth under the action of the reciprocating driving mechanism 36, the two guide blocks 19 close to the sample injector 2 will be alternately acted. When the magnetic block 33 approaches one of the guide blocks 19 with the rotation of the rotating ring 32, the guide block 19 will overcome the compressive force of the elastic component under the magnetic force of the magnetic block 33 and slide toward the shielding cover 34. When the magnetic block 33 approaches another guide block 19 with the rotation of the rotating ring 32, the guide block 19 close to the shielding cover 34 will slide and reset under the compressive action of the elastic component. The reciprocating driving mechanism 36 controls the guide block 19 to swing back and forth, so that the two test tubes 7 close to the sample injector 2 can be driven to be clamped by the clamp arm 15 and swing back and forth, which is conducive to the uniform distribution of the components of the food test sample in the test tube 7.

[0050] The reciprocating drive mechanism 36 includes a motor installed on the shielding cover 34, a turntable rotatably connected to the top of the shielding cover 34, a turntable rotatably connected to the outside of the frame rod and coaxially distributed with the driven wheel 22, and a free end of the turntable is fixed to the rotating ring 32. A round block is fixed to the bottom of the turntable, and a long groove is formed in the turntable to cooperate with the sliding of the round block. When the turntable rotates under the action of the motor, the round block pushes the inner wall of the long groove, driving the rotating ring 32 fixed to the turntable to swing back and forth.

[0051] The elastic component includes a strip groove formed on the top of the frame plate 5 for cooperating with the guide block 19 to slide. A cross bar 20 is fixed in the strip groove and slides through the guide block 19. A compression spring 21 is sleeved on the outer side of the cross bar 20 to radially press the guide block 19 outward.

[0052] When the magnet 33 rotates and approaches the guide block 19, the guide block 19 will overcome the elastic force of the compression spring 21 and slide toward the shielding cover 34. When the magnet 33 rotates away from the guide block 19, the guide block 19 will slide and reset relative to the frame plate 5 under the action of the compression spring 21.

[0053] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A testing device based on food nutritional component analysis, comprising a body (1), a test tube (7), a rubber sleeve (8) placed on the test tube (7), and a sample injector (2) mounted on the body (1), characterized in that: A column (3) is fixedly provided on the top of the machine body (1); a rotary sleeve (4) is rotatably sleeved on the outer side of the column (3); a frame plate (5) is fixedly provided on the outer end of the rotary sleeve (4); and a plurality of opening grooves (6) for fitting test tubes (7) are circumferentially provided in the frame plate (5); A support block (9) for supporting the rubber sleeve (8) is fixedly provided on the top of the frame (5); a clamping arm (15) for clamping the test tube (7) is slidably connected to the top of the frame (5); a driving member for controlling the rotation of the rotary sleeve (4) is provided on the top of the body (1); a slider (26) is slidably embedded in the rotary sleeve (4); a guide structure for driving the slider (26) to move vertically relative to the rotary sleeve (4) is provided on the column (3); a transmission member is provided on the outer side of the rotary sleeve (4); and when the slider (26) moves vertically, the clamping state of the clamping arm (15) on the test tube (7) is adjusted through the transmission member; The top of the frame plate (5) is slidably connected to a guide block (19) corresponding to the clamp arm (15), and a linkage is provided on the guide block (19). The outer side of the column (3) is provided with a pressure piece for driving the guide block (19) to reciprocate along the radial direction of the frame plate (5). When the guide block (19) reciprocates, it controls the clamp arm (15) to swing the test tube (7) back and forth through the linkage.

2. A testing device based on food nutritional component analysis according to claim 1, characterized in that: The driving member comprises a shell cover (31) fixedly mounted on the machine body (1); the rotary sleeve (4) penetrates the shell cover (31) and is rotatably connected to the shell cover (31); a toothed disc (29) is rotatably connected to the shell cover (31); a driving motor (30) for controlling the rotation of the toothed disc (29) is mounted on the top of the shell cover (31); and teeth for engaging with the toothed disc (29) are formed on the side wall of the rotary sleeve (4).

3. A testing device based on food nutritional component analysis according to claim 1, characterized in that: The guide structure comprises a slide groove (401) formed in the rotary sleeve (4) and cooperating with the slider (26) for vertical sliding, a guide rod (28) is fixedly provided at the inner end of the slider (26), and a slideway (301) cooperating with the guide rod (28) for sliding is formed on the side wall of the column (3), and the slideway (301) is composed of an annular groove and a corrugated groove.

4. A testing device based on food nutritional component analysis according to claim 1, characterized in that: The transmission member comprises a sliding frame (13) penetrating and sliding in the frame plate (5), and a component driving the sliding frame (13) to slide. A sliding sleeve (16) is fixedly provided at opposite ends of the two clamping arms (15), and the sliding sleeve (16) is rotatably connected to the sliding frame (13).

5. A testing device based on food nutritional component analysis according to claim 4, characterized in that: The components driving the sliding frame (13) to slide include a bracket (10) fixedly mounted on the bottom of the frame plate (5), a swivel shaft (11) rotatably connected to the inner side of the bracket (10), and a fitting for controlling the rotation of the swivel shaft (11); the swivel shaft (11) slides through the sliding frame (13); a protrusion (14) is formed on the inner wall of the sliding frame (13); and a slide rail (12) is formed on the side wall of the swivel shaft (11) for sliding with the protrusion (14).

6. A testing device based on food nutritional component analysis according to claim 5, characterized in that: The components for controlling the rotation of the rotating shaft (11) include a driven wheel (22) fixed coaxially with the rotating shaft (11), a driving wheel (23) rotatably connected to the bottom of the frame plate (5) via a frame plate, and a telescopic structure for controlling the rotation of the driving wheel (23), and a chain (24) is provided on the outer meshing sleeves of the driving wheel (23) and the driven wheel (22).

7. A testing device based on food nutritional component analysis according to claim 6, characterized in that: The telescopic structure comprises a swing arm (27) rotatably connected to the outside of a sliding block (26), a sliding arm (25) coaxially fixed to the outside of the driving wheel (23), and the sliding arm (25) is slidably connected to the swing arm (27).

8. A testing device based on food nutritional component analysis according to claim 1, characterized in that: The linkage comprises a transmission arm (18) coaxially fixed on a shaft (17); a free end of the transmission arm (18) is rotatably connected to a guide block (19); the shaft (17) slides through the sliding frame (13), the sliding sleeve (16) and the clamping arm (15); the sliding sleeve (16) and the shaft (17) are slidably engaged via a spline.

9. A testing device based on food nutritional component analysis according to claim 1, characterized in that: The pressure member comprises a toothed disc (29) rotatably connected to the outside of the column (3); a magnetic block (33) for magnetically attracting the guide block (19) is fixedly provided at the side end of the toothed disc (29); a shielding cover (34) is fixedly provided at the top of the column (3) via a frame rod; a slot (35) is penetrated through the side of the shielding cover (34); a reciprocating driving mechanism (36) for controlling the reciprocating rotation of the rotating ring (32) is provided on the shielding cover (34); and an elastic component for driving the guide block (19) to slide and reset is provided in the frame disc (5).

10. A testing device based on food nutritional component analysis according to claim 9, characterized in that: The elastic component comprises a strip groove formed on the top of the frame plate (5) and cooperating with the guide block (19) for sliding. A cross bar (20) is fixed in the strip groove and slides through the guide block (19). A compression spring (21) is sleeved on the outer side of the cross bar (20) and presses the guide block (19) radially outward.

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