Food processing liquid chromatograph automatic sample injector with protection effect

Abstract

The utility model relates to the field of liquid chromatographs, in particular to an automatic sample injector of a liquid chromatograph for food processing, which has a protection effect. The food processing liquid chromatograph automatic sample injector with the protection effect comprises a sample injection needle head, one end of the sample injection needle head is connected with one end of a sample injection pipe, the outer wall of the sample injection pipe is movably connected with a mounting plate, the bottom of the mounting plate is provided with a mounting groove, the mounting groove is movably connected with a protection cylinder, and the protection cylinder is movably connected with the sample injection pipe. A first baffle and a second baffle are rotationally connected to the opposite inner surfaces of the protection barrel correspondingly, the outer wall of the first rotating shaft is sleeved with a first spring, and the outer wall of the second rotating shaft is sleeved with a second spring; the automatic liquid chromatograph sampler with the protection effect for food processing has the advantages that foreign matters are prevented from entering from the lower end of the protection cylinder, the needle head is prevented from being polluted, and the follow-up detection precision is prevented from being influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of liquid chromatograph, especially to a liquid chromatograph automatic sample injector with protection effect for food processing. BACKGROUND

[0002] Liquid chromatograph is divided into liquid-liquid chromatography (LLC) and liquid-solid chromatography (LSC) according to whether the stationary phase is liquid or solid, and the modern liquid chromatograph is composed of high-pressure liquid pump, sample injection system, temperature control system, chromatographic column, detector and signal recording system, compared with the classical liquid column chromatography device, it has the characteristics of high efficiency, rapidness and sensitivity, and plays an extremely important role in food processing, the high liquid chromatograph can detect food additives, pollutants in food, toxins generated in the process of processing and storage, drug residues in food and illegal added ingredients in food, and improve the safety of food processing.

[0003] In the prior art, the liquid chromatograph automatic sample injection device is placed, the sample injection needle is exposed outside, dust is easy to adhere, the needle must be cleaned before using the sample injection device in the later period, which is too cumbersome and brings certain adverse effects to the use process of people.

[0004] Therefore, it is necessary to provide a new liquid chromatograph automatic sample injector with protection effect for food processing to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a liquid chromatograph automatic sample injector with protection effect for food processing.

[0006] The utility model provides a liquid chromatograph automatic sample injector with protection effect for food processing, including: sample injection needle, one end of the sample injection needle is connected with one end of sample injection tube, the other end of the sample injection tube is connected with sample injection pump, the side surface of the sample injection tube is connected with the material moving mechanism who can drive the sample injection tube to move in many directions, the outer wall of the sample injection tube is movably connected with the mounting plate, the bottom of the mounting plate is equipped with the installation groove, the installation groove is movably connected with the protection cylinder, the opposite inner surfaces of the protection cylinder are equipped with first connecting groove and second connecting groove respectively, the first connecting groove is rotatably connected with first baffle through first pivot, the second connecting groove is rotatably connected with second baffle through second pivot, the outer wall of the first pivot is sleeved with first spring, and the both ends of the first spring are connected with the inner wall of the first pivot and first connecting groove respectively, the outer wall of the second pivot is sleeved with second spring, and the both ends of the second spring are connected with the inner wall of the second pivot and second connecting groove respectively.

[0007] Preferably, the outer surface of the protective cylinder is provided with external threads, and the inner wall of the mounting groove is provided with internal threads matched with the external threads.

[0008] Preferably, the top of the mounting plate is provided with a moving hole which is slidingly connected to the outer wall of the sample inlet tube, the outer wall of the sample inlet tube is provided with sample inlet external threads, and the two ends of the sample inlet external threads are respectively threadedly connected to an upper limiting cylinder and a lower limiting cylinder which are respectively located above and below the mounting plate.

[0009] Preferably, the lower end of the interior of the protective cylinder is provided with a limiting internal thread which is threadedly connected to the outer surface of a limiting ring, and the top of the limiting ring is in contact with the bottom of the first baffle.

[0010] Preferably, the bottom of the limiting ring is respectively provided with a first rotating groove and a second rotating groove at the two ends thereof, and the first rotating groove and the second rotating groove are respectively movably connected to the two ends of a rotating piece.

[0011] Preferably, the top of one end of the first baffle is provided with a connecting groove, and the top of one end of the second baffle is provided with a connecting block matched with the connecting groove.

[0012] Preferably, the side surface of the protective cylinder is provided with a plurality of observation holes, and the observation holes are internally provided with observation windows made of transparent material.

[0013] Compared with the related art, the automatic sample injector for the liquid chromatograph for food processing with the protective effect has the following beneficial effects:

[0014] The automatic sample injector for the liquid chromatograph for food processing with the protective effect provided by the utility model drives the sample inlet tube to move through the material moving mechanism, moves the sample inlet tube above the corresponding sample bottle, moves the liquid inlet tube up and down through the material moving mechanism, and then drives the sample inlet needle to move up and down, when the sample inlet needle moves downward, the first baffle and the second baffle can be lifted upward by the outer surface of the sample bottle, then the sample inlet needle is inserted into the sample bottle, then the sample inlet pump is started to carry out the sample injection operation, after the sample injection is completed, the sample inlet needle is moved upward by the material moving mechanism, after the sample inlet needle is separated from the sample bottle, the first baffle and the second baffle are restored to the original position through the recovery of the first spring and the second spring, the lower end of the protective cylinder is closed, and then foreign matters are prevented from entering from the lower end of the protective cylinder to pollute the needle and affect the precision of subsequent detection. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The structure schematic view of a preferred embodiment of the automatic sample injector for the liquid chromatograph for food processing with the protective effect provided by the utility model is shown in the figure.

[0016] Figure 2 The structure schematic view of a preferred embodiment of the automatic sample injector for the liquid chromatograph for food processing with the protective effect provided by the utility model is shown in the figure.Figure 1 A schematic structural diagram of a liquid chromatograph automatic sample injector for food processing with a protective effect from a bottom perspective is shown;

[0017] Figure 3 for Figure 1 The schematic diagram of the structure of the injection needle and the injection tube shown;

[0018] Figure 4 for Figure 1 A schematic structural diagram of the first connecting groove and the second connecting groove shown;

[0019] Figure 5 for Figure 1 A schematic structural diagram of the first baffle and the second baffle shown;

[0020] Figure 6 for Figure 1 The structural diagram of the limiting ring shown;

[0021] Numbers in the figure: 1. Protective cylinder; 2. Injection tube; 3. Injection external thread; 4. Upper limit cylinder; 5. Mounting plate; 6. Observation hole; 7. Observation window; 8. First baffle; 9. Second baffle; 10. Limiting ring; 11. Internal thread; 12. Injection needle; 13. Lower limit cylinder; 14. Mounting groove; 15. Limiting internal thread; 16. External thread; 17. First connecting groove; 18. Second connecting groove; 19. First rotating shaft; 20. First spring; 21. Connecting groove; 22. Second rotating shaft; 23. Second spring; 24. Connecting block; 25. First rotating groove; 26. Second rotating groove. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0024] See also Figures 1 to 6The utility model discloses an automatic sample injector of liquid chromatograph for food processing with protection effect, an automatic sample injector of liquid chromatograph for food processing with protection effect includes: sample injection needle head 12, one end of sample injection needle head 12 is connected with one end of sample injection tube 2, the other end of sample injection tube 2 is connected with sample injection pump, the side of sample injection tube 2 is connected with the material removal mechanism that can drive sample injection tube 2 and carry out multidirectional movement, the outer wall of sample injection tube 2 is swingly connected with mounting plate 5, the bottom of mounting plate 5 is equipped with installation groove 14, installation groove 14 swingly connects protection cylinder 1, the opposite inner surface of protection cylinder 1 is equipped with first connecting groove 17 and second connecting groove 18 respectively, first connecting groove 17 is rotatably connected with first baffle 8 through first pivot 19, second connecting groove 18 is rotatably connected with second baffle 9 through second pivot 22, the outer wall of first pivot 19 is sleeved with first spring 20, and the both ends of first spring 20 are connected with the inner wall of first pivot 19 and first connecting groove 17 respectively, the outer wall of second pivot 22 is sleeved with second spring 23, and the both ends of second spring 23 are connected with the inner wall of second pivot 22 and second connecting groove 18 respectively.

[0025] Need to explain, by setting up protection cylinder 1 and being equipped with first baffle 8 and second baffle 9 at the lower end of protection cylinder 1, when not using, through first baffle 8 and second baffle 9, the lower end of fireproof cylinder can be protected, prevent foreign matter from entering the lower end of protection cylinder 1, pollute needle head, influence the precision of subsequent detection, and when using, can drive sample injection tube 2 to move by material removal mechanism, move it to the upper side of corresponding sample bottle, and through material removal mechanism, the liquid inlet pipe is moved up and down, and then sample injection needle head 12 is moved up and down, when sample injection needle head 12 is moved down, by the outer surface of sample bottle, first baffle 8 and second baffle 9 can be lifted up, then sample injection needle head 12 is inserted into sample bottle, then start sample injection pump and carry out sample injection work, after completing sample injection, drive sample injection needle head 12 to move up by material removal mechanism, after separating from sample bottle, by the recovery of first spring 20 and second spring 23, first baffle 8 and second baffle 9 are recovered to the original position, realize the closure of the lower end of protection cylinder 1, and then prevent foreign matter from entering the lower end of protection cylinder 1, pollute needle head, influence the precision of subsequent detection.

[0026] In the embodiment of the utility model, please refer to Figure 3 And Figure 4 The outer surface of protection cylinder 1 is equipped with external thread 16, and the inner wall of installation groove 14 is equipped with internal thread 11 matched with external thread 16.

[0027] Need to explain, by setting up external thread 16 and internal thread 11, protection cylinder 1 and installation groove 14 can be connected, and by thread connection, the stability of connection can be improved.

[0028] In the embodiment of the utility model, please refer to Figure 1 And Figure 3 The top of mounting plate 5 is equipped with moving hole, moving hole is connected with the outer wall of sample tube 2, the outer wall of sample tube 2 is equipped with sample outer thread 3, the both ends of sample outer thread 3 are respectively connected with upper limit cylinder 4 and lower limit cylinder 13 by thread, and upper limit cylinder 4 and lower limit cylinder 13 are respectively located above and below mounting plate 5.

[0029] It should be noted that, by setting the moving hole, the mounting plate 5 is moved up and down on the sample tube 2, thereby changing the vertical position of the protective cylinder 1, and by setting the upper limit cylinder 4 and the lower limit cylinder 13, the mounting plate 5 moved to the appropriate position is fixed, preventing it from moving due to external force and affecting subsequent use.

[0030] In the embodiment of the utility model, please refer to Figure 1 And Figure 4 The lower end of the protective cylinder 1 is equipped with a limit inner thread 15, the limit inner thread 15 is connected with the outer surface of the limit ring 10 by thread, and the top of the limit ring 10 is in contact with the bottom of the first baffle 8.

[0031] In the embodiment of the utility model, please refer to Figure 2 The bottom of the limit ring 10 is equipped with a first rotating groove 25 and a second rotating groove 26 at both ends, and the first rotating groove 25 and the second rotating groove 26 are respectively connected with both ends of the rotating piece.

[0032] It should be noted that, by setting the limit ring 10, the first baffle 8 and the second baffle 9 can be limited, preventing the first baffle 8 and the second baffle 9 from being flipped down under the recovery operation of the spring, affecting the subsequent use, and by setting the first rotating groove 25 and the second rotating groove 26, the limit ring 10 can be rotated, improving the convenience of disassembly and replacement of the limit ring 10.

[0033] In the embodiment of the utility model, please refer to Figure 5 The top of one end of the first baffle 8 is equipped with a connecting groove 21, and the top of one end of the second baffle 9 is equipped with a connecting block 24 matched with the connecting groove 21.

[0034] It should be noted that, by setting the connecting groove 21 and the connecting block 24, the sealing property of the connection between the first baffle 8 and the second baffle 9 can be improved when the first baffle 8 and the second baffle 9 return to the original position.

[0035] In the embodiment of the utility model, please refer to Figure 1 The side of the protective cylinder 1 is equipped with a plurality of observation holes 6, and the observation window 7 made of transparent material is installed in the inside of the observation hole 6.

[0036] Need to explain, by setting observation window 7, facilitate the user to see the needle operation, when the abnormal, can first time processing, prevent the damage of needle, affect the subsequent use

[0037] The working principle of the food processing liquid chromatograph automatic sample injector with protection effect provided by the utility model is as follows: when in use, the sample injection tube 2 can be moved by the material moving mechanism, and the sample injection tube 2 is moved above the corresponding sample bottle; the liquid inlet pipe is moved up and down by the material moving mechanism, and the sample injection needle 12 is moved up and down; when the sample injection needle 12 is moved downward, the outer surface of the sample bottle is utilized to lift the first baffle 8 and the second baffle 9 upward, then the sample injection needle 12 is inserted into the sample bottle, then the sample injection pump is started to perform the sample injection operation; after the sample injection is completed, the sample injection needle 12 is moved upward by the material moving mechanism, and after the sample injection needle 12 is separated from the sample bottle, the first baffle 8 and the second baffle 9 are returned to the original position by the return of the first spring 20 and the second spring 23, the lower end of the protection cylinder 1 is closed, and then foreign matters are prevented from entering from the lower end of the protection cylinder 1 to pollute the needle and affect the precision of subsequent detection.

[0038] The circuit and the control involved in the utility model are prior art, and too much repetition is not performed here.

[0039] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and equivalent structures or equivalent process transformations made by using the contents of the utility model specification and drawings, or direct or indirect application in other related technical fields are also included in the patent protection range of the utility model.

Claims

1. A liquid chromatograph automatic sample injector for food processing with protective effect, characterized in that: include: An injection needle (12), one end of the injection needle (12) is connected to one end of an injection tube (2), the other end of the injection tube (2) is connected to an injection pump, the side of the injection tube (2) is connected to a material moving mechanism that can drive the injection tube (2) to move in multiple directions, the outer wall of the injection tube (2) is movably connected to a mounting plate (5), the bottom of the mounting plate (5) is provided with a mounting groove (14), the mounting groove (14) is movably connected to a protective tube (1), and the opposite inner surfaces of the protective tube (1) are respectively provided with a first connecting groove (17) and a second connecting groove (18), The first connecting groove (17) is rotatably connected to the first baffle (8) via a first rotating shaft (19), and the second connecting groove (18) is rotatably connected to the second baffle (9) via a second rotating shaft (22). A first spring (20) is sleeved on the outer wall of the first rotating shaft (19), and two ends of the first spring (20) are respectively connected to the first rotating shaft (19) and the inner wall of the first connecting groove (17). A second spring (23) is sleeved on the outer wall of the second rotating shaft (22), and two ends of the second spring (23) are respectively connected to the second rotating shaft (22) and the inner wall of the second connecting groove (18).

2. The liquid chromatograph automatic sample injector for food processing with protective effect according to claim 1, characterized in that: The outer surface of the protective tube (1) is provided with an external thread (16), and the inner wall of the installation groove (14) is provided with an internal thread (11) that matches the external thread (16).

3. The liquid chromatograph automatic sample injector for food processing with protective effect according to claim 1, characterized in that: A movable hole is provided on the top of the mounting plate (5), and the movable hole is slidably connected to the outer wall of the sample injection tube (2). The outer wall of the sample injection tube (2) is provided with an injection external thread (3), and the two ends of the injection external thread (3) are respectively threadedly connected to the upper limit cylinder (4) and the lower limit cylinder (13). The upper limit cylinder (4) and the lower limit cylinder (13) are respectively located above and below the mounting plate (5).

4. The liquid chromatograph automatic sample injector for food processing with protective effect according to claim 1, characterized in that: The lower end of the interior of the protective tube (1) is provided with a limiting internal thread (15), and the limiting internal thread (15) is connected to the outer surface of the limiting ring (10) through a thread, and the top of the limiting ring (10) contacts the bottom of the first baffle (8).

5. The liquid chromatograph automatic sample injector for food processing with protective effect according to claim 4, characterized in that: A first rotation groove (25) and a second rotation groove (26) are respectively provided at both ends of the bottom of the limiting ring (10), and the first rotation groove (25) and the second rotation groove (26) are respectively movably connected to the two ends of the rotating member.

6. The liquid chromatograph automatic sample injector for food processing with protective effect according to claim 4, characterized in that: A connecting groove (21) is provided at the top of one end of the first baffle (8), and a connecting block (24) that matches the connecting groove (21) is provided at the top of one end of the second baffle (9).

7. The liquid chromatograph automatic sample injector for food processing with protective effect according to claim 1, characterized in that: The side of the protective tube (1) is provided with a plurality of observation holes (6), and the inside of the observation holes (6) is provided with an observation window (7) made of a transparent material.

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