Liquid chromatograph needle protection assembly for food detection

Abstract

The utility model discloses a liquid chromatograph needle protection assembly for food detection, which comprises a needle cylinder, a sleeve is fixed at the front end of the needle cylinder, and one end of the sleeve is connected with a needle; the protective shell I and the protective shell II are movably connected to the upper side and the lower side of the sleeve respectively; the second hinge pieces are installed on the inner sides of the first protective shell and the second protective shell correspondingly. The lantern ring is sleeved on the surface of the needle head; the hinging pieces I are symmetrically mounted on the surface of the lantern ring; adjusting holes are formed in the upper side and the lower side of the sleeve and the tail ends of the first protective shell and the second protective shell. The surface of the first protective shell and the surface of the second protective shell are both connected with adjusting pieces matched with the adjusting holes. According to the utility model, the adjusting piece, the protective shell I and the protective shell II are adopted, so that when the needle head is in an idle state, a worker can loosen the adjusting piece and unfold the protective shell I and the protective shell II to proper positions to form a square, and the needle head is protected, thereby reducing the entering of external dust or other impurities.

Description

Technical Field

[0001] The utility model relates to the technical field of food detection, in particular to a liquid chromatograph needle protection component for food detection. Background Art

[0002] Liquid chromatography is often used in food testing to detect pesticide residues, microbial counts, total colony counts, E. coli counts, nutritional components and physical and chemical indicators. Since the injection needles of liquid chromatographs are relatively long, a protective component is required to protect the needles.

[0003] In combination with the existing literature, a sample injection device for a liquid chromatograph (CN209673738U) includes a bottom plate, the bottom outer wall of the bottom plate is provided with fixed teeth distributed at equal distances, a fixed sleeve is provided on one side of the top outer wall of the bottom plate, and a positioning hole is opened on the outer wall of one side of the fixed sleeve near the top, and a positioning pin is inserted into the inner wall of the positioning hole. The utility model can prevent the sample injector from falling off the clamping plate due to insufficient friction and falling to the ground, and can prevent the sampling of the sample injector from being affected due to the different heights of the container containing the mixture;

[0004] The existing technology has the following problems:

[0005] 1. The needle of the injector is usually exposed, which makes it easy to adhere to dust or impurities floating in the air when it is idle, resulting in the accuracy of sample detection being affected by dust and other impurities during the next injection process.

[0006] 2. During the injection process, the needle part needs to be connected to the liquid chromatograph to inject the sample. However, since the needle part is usually long, the needle may bend or break during the injection process, increasing the cost of replacement.

[0007] Therefore, we proposed a liquid chromatograph needle protection component for food testing to solve the above-mentioned drawbacks. Utility Model Content

[0008] The utility model aims to solve the shortcomings in the prior art and proposes a needle protection component for a liquid chromatograph used for food detection.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:.

[0010] A liquid chromatograph needle protection assembly for food testing comprises a syringe, a sleeve is fixed to the front end of the syringe, and a needle is connected to one end of the sleeve;

[0011] A protective shell 1 and a protective shell 2, which are movably connected to the upper side and the lower side of the sleeve respectively;

[0012] A second hinged member, which is mounted on the inner side of the protective shell 1 and the protective shell 2 respectively;

[0013] A collar, which is sleeved on the surface of the needle;

[0014] A hinged part 1 is symmetrically mounted on the surface of the collar.

[0015] Preferably, adjustment holes are provided on the upper and lower sides of the sleeve and the ends of the protective shell 1 and the protective shell 2.

[0016] Preferably, the surfaces of the protective shell 1 and the protective shell 2 are both connected with adjustment pieces that match the adjustment holes.

[0017] Preferably, one end of the hinged component 1 is hinged with a connecting rod, and the other end of the connecting rod is hinged with the hinged component 2.

[0018] Preferably, the needle passes through one side of the sleeve and is connected with the syringe.

[0019] Preferably, the lengths of the protective shell 1 and the protective shell 2 are both longer than the length of the exposed portion of the needle.

[0020] Preferably, the protective shell 1 and the protective shell 2 can form a cube after contact, and the inner diameter of the ring is consistent with the outer diameter of the needle.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] (1) The utility model adopts an adjusting member, a protective shell 1 and a protective shell 2. When the needle is in an idle state, the staff can loosen the adjusting member and unfold the protective shell 1 and the protective shell 2 to a suitable position to form a square to protect the needle, thereby reducing the entry of external dust or other impurities, so as to facilitate subsequent detection operations.

[0023] (2) The utility model adopts a connecting rod, a hinge part 1, a collar and a hinge part 2. When the protective shell 1 and the protective shell 2 are unfolded, the collar slides on the surface of the needle with the cooperation of the hinge part 1, the collar and the hinge part 2, and the locking adjustment part is adjusted to a suitable position to provide auxiliary support for the needle, thereby reducing the bending or breaking of the needle due to its excessive length during the injection process, thereby reducing the replacement cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings required to be used in the embodiments are briefly introduced below.

[0025] Figure 1This is a schematic diagram of the overall structure of a liquid chromatograph needle protection assembly for food testing proposed by the utility model;

[0026] Figure 2 This is a schematic diagram of the closed structure of the first and second protective shells of a needle protection assembly of a liquid chromatograph for food testing proposed by the utility model;

[0027] Figure 3 This is a schematic diagram of the unfolded structure of the first and second protective shells of a needle protection assembly of a liquid chromatograph for food testing proposed by the utility model;

[0028] Figure 4 This is a schematic diagram of the front section structure of the first and second protective shells of a needle protection assembly of a liquid chromatograph for food testing proposed by the utility model;

[0029] Figure 5 The utility model is a schematic diagram of a connecting rod structure of a needle protection assembly of a liquid chromatograph for food testing.

[0030] Legend:

[0031] 1. Syringe; 2. Sleeve; 3. Needle; 4. Protective shell 1; 5. Protective shell 2; 6. Adjustment piece; 7. Adjustment hole; 8. Ring; 9. Connecting rod; 10. Hinge 1; 11. Hinge 2. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0033] Example: Figure 1-Figure 5 As shown, a liquid chromatograph needle protection assembly for food testing includes a syringe 1, a sleeve 2 for connecting various structures to facilitate the coordinated use of various structures, and the initial state of the whole is Figure 2As shown in the figure, the protective shell 1 4 and the protective shell 2 5 are in a closed state. Since the lengths of the protective shell 1 4 and the protective shell 2 5 are both greater than the length of the needle 3, the needle 3 inside is protected. When it is needed, the staff can loosen the adjusting members 6 on the surfaces of the protective shell 1 4 and the protective shell 2 5 in turn. After the adjusting members 6 rotate to a certain extent in the adjusting holes 7, the fixing state of the protective shell 1 4 and the protective shell 2 5 is released, and then the protective shell 1 4 and the protective shell 2 5 are simultaneously unfolded outwards. Since the hinge 10 is fixed to the protective shell 1 4 and the protective shell 2 On the inner side of the shell 2 5, the two ends of the connecting rod 9 are respectively hinged with a hinge 10 and a hinge 2 11, and the ring 8 is sleeved on the surface of the needle 3, so that during the unfolding process of the protective shell 1 4 and the protective shell 2 5, the connecting rod 9 drives the ring 8 to slide on the surface of the needle 3 under the cooperation of the hinge 10 and the hinge 2 11. When the protective shell 1 4 and the protective shell 2 5 are unfolded to a suitable angle, the ring 8 is located around the middle position of the needle 3, and then the adjusting parts 6 on the surface of the protective shell 1 4 and the protective shell 2 5 are locked in turn, thereby playing a certain supporting role on the needle 3 to facilitate subsequent sampling work.

[0034] Working principle: When in use, the staff can loosen the adjusting parts 6 on the surface of the protective shell 1 4 and the protective shell 2 5 in turn, and then simultaneously unfold the protective shell 1 4 and the protective shell 2 5 outward, so that during the unfolding process of the protective shell 1 4 and the protective shell 2 5, the connecting rod 9 drives the ring 8 to slide on the surface of the needle 3 under the cooperation of the hinge 10 and the hinge 2 11. When the protective shell 1 4 and the protective shell 2 5 are unfolded to the appropriate position, the adjusting parts 6 on the surface of the protective shell 1 4 and the protective shell 2 5 are locked in turn, thereby playing a certain supporting role for the needle 3 to facilitate the subsequent sampling work, and when the needle 3 is in an idle state, the staff can loosen the adjusting parts 6, unfold the protective shell 1 4 and the protective shell 2 5 to the appropriate position to form a square, protect the needle 3, and thus reduce the entry of external dust or other impurities.

[0035] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A liquid chromatograph needle protection assembly for food testing, characterized in that: include: A syringe (1), wherein a sleeve (2) is fixed to the front end of the syringe (1), and a needle (3) is connected to one end of the sleeve (2); A protective shell 1 (4) and a protective shell 2 (5), which are movably connected to the upper side and the lower side of the sleeve (2) respectively; A second hinge part (11), which is respectively mounted on the inner side of the protective shell one (4) and the protective shell two (5); A collar (8) sleeved on the surface of the needle (3); A hinged part (10) is symmetrically mounted on the surface of the collar (8).

2. The needle protection assembly for liquid chromatography for food testing according to claim 1, characterized in that: Adjustment holes (7) are provided on the upper and lower sides of the sleeve (2) and at the ends of the first protective shell (4) and the second protective shell (5).

3. The needle protection assembly for liquid chromatograph for food testing according to claim 1, characterized in that: The surfaces of the protective shell 1 (4) and the protective shell 2 (5) are both connected with adjustment pieces (6) that match the adjustment holes (7).

4. The needle protection assembly for liquid chromatography for food testing according to claim 1, characterized in that: One end of the hinged component 1 (10) is hingedly connected to a connecting rod (9), and the other end of the connecting rod (9) is hingedly connected to the hinged component 2 (11).

5. The needle protection assembly for liquid chromatograph for food testing according to claim 1, characterized in that: The needle (3) passes through one side of the sleeve (2) and is connected to the syringe (1).

6. The needle protection assembly for liquid chromatography for food testing according to claim 1, characterized in that: The lengths of the protective shell 1 (4) and the protective shell 2 (5) are both longer than the length of the exposed portion of the needle (3).

7. The needle protection assembly for liquid chromatography for food testing according to claim 1, characterized in that: The protective shell 1 (4) and the protective shell 2 (5) can form a cube when in contact, and the inner diameter of the collar (8) matches the outer diameter of the needle (3).

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