Needle head protection structure of food gas chromatograph

Abstract

The utility model discloses a needle head protection structure of a food gas chromatograph, which comprises a chromatograph main body, an opening and closing door is arranged at the front section of the chromatograph main body, an injection needle head is arranged in the opening and closing door, an inner shell is arranged on the outer side of the injection needle head, and an outer shell is further arranged on the outer side of the inner shell; a blocking block is arranged in the shell. According to the needle head protection structure, when the needle head protection structure is used, the cleaning sponge is arranged at the position of the movement track of the needle head when the needle head is used or recycled every time, the needle head can be cleaned, for example, when the needle head protection structure is used, the close sponge can be lengthened through the electric push rod firstly, and meanwhile the threaded sliding block is further arranged at the lower end of the movable block; and the extended cleaning sponge is matched to wrap the whole injection needle head and clean and wipe the needle head, and the needle head is relatively recycled, so that the needle head is ensured to be clean, and the detection accuracy and efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas chromatographs, in particular to a needle protection structure of a food gas chromatograph. Background Art

[0002] Gas chromatograph is a commonly used analytical instrument that can perform qualitative and quantitative detection of organic matter in food, thereby ensuring food safety, quality and nutrition.

[0003] When testing food, especially using a gas chromatograph, a needle is often inserted into the food, and the organic solution extracted from the food is injected into a heated tube for testing. During this process, the needle needs to be constantly drawn when in use, and the drawn food is different. For example, there may be residues of sprayed pesticides on the grown food, which will be cleaned up during the drawing, resulting in inaccurate test data. The needle needs to be replaced frequently, which delays its use.

[0004] Therefore, we propose a needle protection structure for food gas chromatograph to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a needle protection structure for a food gas chromatograph. When the needle protection structure is used, a cleaning sponge is first arranged at the trajectory of movement each time the needle is used or recovered, and the needle is cleaned. When in use, the cleaning sponge is first extended by an electric push rod, and a threaded sliding block is also arranged at the lower end of the moving block, which cooperates with the extended cleaning sponge to wrap the entire injection needle and clean and wipe the needle. The same is true when it is recovered to ensure that the needle is clean, thereby improving the accuracy and efficiency of detection, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A needle protection structure for a food gas chromatograph comprises a chromatograph body, wherein an opening and closing door is arranged at the front section of the chromatograph body, and an injection needle is arranged inside the opening and closing door, an inner shell is arranged outside the injection needle, and an outer shell is also arranged outside the inner shell; a blocking block is arranged inside the outer shell, a threaded sliding block is arranged inside the blocking block, and a moving block is arranged at the upper end of the threaded sliding block, an electric push rod is arranged inside the moving block, and a cleaning sponge is arranged at the front end of the electric push rod.

[0008] In a further embodiment, an adjustment plate is provided at the lower end of the inner shell, an electric threaded rod is threadedly mounted on the inner wall of the adjustment plate, and the other end of the electric threaded rod is mounted on the bottom end of the barrier block.

[0009] In a further embodiment, a threaded block is disposed at the bottom end of the housing, and the threaded block is slidably mounted on the inner wall of the chromatograph body.

[0010] In a further embodiment, an opening is provided at the middle end of the outer shell, a delivery tube is installed at the opening, one end of the delivery tube passes through the inner shell and is connected to the injection needle, and the other end is provided with a connector.

[0011] In a further embodiment, the connector is fixedly mounted on the inner wall of the chromatograph body and connected to the detection system in the chromatograph body.

[0012] In a further embodiment, the cleaning sponges are arranged in two symmetrical groups, and an electric screw is installed in the inner wall of the threaded sliding block arranged at the lower end.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model, when using the needle protection structure, firstly, each time the needle is used or recovered, a cleaning sponge is arranged at the moving track to clean the needle. When in use, the sponge is first extended by the electric push rod, and at the same time, a threaded sliding block is arranged at the lower end of the moving block, which cooperates with the extended cleaning sponge to wrap the entire injection needle and clean and wipe the needle. The same is true when recovering, to ensure that the needle is clean, thereby improving the accuracy and efficiency of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of a needle protection structure of a food gas chromatograph;

[0016] Figure 2 This is a schematic diagram of the internal structure of the chromatograph body of a needle protection structure of a food gas chromatograph;

[0017] Figure 3 It is a schematic diagram of the front view of a needle protection structure of a food gas chromatograph;

[0018] Figure 4 It is a schematic diagram of the internal structure of the outer shell of a needle protection structure of a food gas chromatograph;

[0019] Figure 5 The present invention is a schematic diagram of the structure of a barrier block of a needle protection structure of a food gas chromatograph.

[0020] In the figure: 1. Chromatograph body; 2. Opening and closing door; 3. Connector; 4. Injection needle; 5. Delivery tube; 6. Inner shell; 7. Adjustment plate; 8. Electric threaded rod; 9. Outer shell; 10. Threaded block; 11. Blocking block; 12. Threaded sliding block; 13. Moving block; 14. Electric push rod; 15. Cleaning sponge. DETAILED DESCRIPTION

[0021] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-5A needle protection structure of a food gas chromatograph comprises a chromatograph body 1. When the chromatograph body 1 is used, the opening and closing door 2 needs to be opened first, and the food is put in. After the food is put in, the threaded block 10 is set to move left and right after the internal electric screw is started, so as to drive the outer shell 9 to adjust the position, so that the built-in injection needle 4 reaches the position for extraction. When the extracted object is extracted, it will enter the connector 3 through the conveying tube 5 for detection, and the injection needle 4 will be recovered at the same time;

[0025] When the injection needle 4 is used or recovered, it is pushed by the adjustment plate 7 arranged on the inner shell 6. Specifically, by starting the electric threaded rod 8, the adjustment plate 7 is driven forward by the characteristics of the threaded connection, thereby pushing the inner shell 6, that is, pushing the injection needle 4 forward, and inserting it into the food for extraction. In this process, the barrier block 11 provided will limit the maximum distance of the adjustment plate 7 to limit and protect the embedding distance of the injection needle 4 and prevent the injection needle 4 from being inserted too deeply. At the same time, a threaded sliding block 12 is provided in the inner wall of the barrier block 11. When the injection needle 4 moves, it will push the moving block 13 close to the injection needle 4. At the same time, the electric push rod 14 provided inside the moving block 13 will push the cleaning sponge 15 to wrap the injection needle 4 to clean the surface when it moves forward or backward, so as to ensure the cleanliness of the injection needle 4, extend the service life of the injection needle 4, and improve work efficiency.

[0026] The working principle of the utility model is as follows: as shown in the figure, it comprises a chromatograph body 1. When the chromatograph body 1 is used, it is necessary to first open the opening and closing door 2 and put the food in. After putting the food in, the threaded block 10 is set and the electric screw inside is started to move left and right, driving the outer shell 9 to adjust the position, so that the built-in injection needle 4 reaches the position for extraction. When extracting, the extracted object will enter the connector 3 through the conveying tube 5 for detection, and the injection needle 4 will be recovered at the same time; and when the injection needle 4 is used or recovered, it is pushed by the adjustment plate 7 set on the inner shell 6, specifically, by starting the electric threaded rod 8, the adjustment plate 7 is driven forward by the characteristics of the threaded connection , thereby pushing the inner shell 6, that is, pushing the injection needle 4 forward, inserting it into the food for extraction, and the barrier block 11 set in this process will limit the farthest distance of the adjustment plate 7, to limit and protect the embedding distance of the injection needle 4, to prevent the injection needle 4 from being inserted too deeply, and at the same time, a threaded sliding block 12 is provided in the inner wall of the barrier block 11. When the injection needle 4 moves, it will push the moving block 13 close to the injection needle 4. At the same time, the electric push rod 14 set inside the moving block 13 will push the cleaning sponge 15 to wrap the injection needle 4 to clean the surface when it moves forward or backward, to ensure the cleanliness of the injection needle 4, so that the service life of the injection needle 4 is longer, to improve work efficiency.

[0027] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A needle protection structure for a food gas chromatograph, characterized in that: The chromatograph comprises a main body (1), wherein the front section of the main body (1) is provided with an opening and closing door (2), and an injection needle (4) is arranged inside the opening and closing door (2), an inner shell (6) is arranged outside the injection needle (4), and an outer shell (9) is also arranged outside the inner shell (6); The housing (9) is provided with a blocking block (11) inside, a threaded sliding block (12) inside the blocking block (11), a moving block (13) at the upper end of the threaded sliding block (12), an electric push rod (14) inside the moving block (13), and a cleaning sponge (15) at the front end of the electric push rod (14).

2. The needle protection structure of a food gas chromatograph according to claim 1, characterized in that: An adjustment plate (7) is arranged at the lower end of the inner shell (6), an electric threaded rod (8) is threadedly mounted on the inner wall of the adjustment plate (7), and the other end of the electric threaded rod (8) is arranged and mounted on the bottom end of the blocking block (11).

3. The needle protection structure of a food gas chromatograph according to claim 1, characterized in that: A threaded block (10) is provided at the bottom end of the housing (9), and the threaded block (10) is slidably mounted on the inner wall of the chromatograph body (1).

4. The needle protection structure of a food gas chromatograph according to claim 1, characterized in that: An opening is provided at the middle end of the outer shell (9), a delivery tube (5) is installed at the opening, one end of the delivery tube (5) passes through the inner shell (6) and is connected to the injection needle (4), and the other end is provided with a connector (3).

5. The needle protection structure of a food gas chromatograph according to claim 4, characterized in that: The connector (3) is fixedly mounted on the inner wall of the chromatograph body (1) and is connected to the detection system in the chromatograph body (1).

6. The needle protection structure of a food gas chromatograph according to claim 3, characterized in that: The cleaning sponges (15) are arranged in two symmetrical pieces, and an electric screw is installed in the inner wall of the threaded sliding block (12) arranged at the lower end.

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