Sample injection needle auxiliary operation device

Abstract

The utility model discloses a kind of sample introduction needle auxiliary operation devices, including needle cylinder and needle box, the needle cylinder is fixed in needle box by U-shaped hoop, the needle box top and front end are open, the needle cylinder front end is towards needle box front end, the rear end plate of the needle box is equipped with the push rod of threaded connection, the push rod and the piston rod coaxial line of needle cylinder, the push rod and piston rod fixed connection.The U-shaped hoop has two, the U-shaped hoop is fixedly connected by screw and needle box.The push rod front end has round plate, rear end has screw head, the round plate is fixedly connected with piston rod.The utility model is compared with prior art's advantage lies in: the standardization control of sample introduction volume is realized, effectively improve the reproducibility and accuracy of gas chromatography analysis, solve the volume deviation problem caused by inconsistency of propelling force and stroke in manual sampling, it can also be reproduced, simple and convenient operation, low cost, easy in this field popularization and application.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary operation devices for injection needles, specifically to an auxiliary operation device for injection needles. Background Technology

[0002] Gas chromatography (GC) has become an indispensable tool in the field of chemical separation and analysis due to its high separation efficiency, high sensitivity, accurate quantification, and wide range of applications. GC utilizes the differences in the partition coefficients of different components in a sample between the mobile and stationary phases, achieving separation of the components through multiple partitioning processes. The analytical process of GC involves: injection, separation, detection, and data processing. Injection is the first and crucial step in GC. Autosamplers, due to their extremely high precision and accuracy, high safety, and minimal operational variability, have become a core component of modern chromatographs. However, their high initial cost, maintenance complexity, and potential failure points limit their wider application. Therefore, this paper proposes a standardized operating device that can fix the physical injection volume of the injection needle to address these issues. Utility Model Content

[0003] The purpose of this invention is to provide an auxiliary operating device for injection needles to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] This utility model discloses an auxiliary operating device for injection needles, comprising a syringe and a needle box. The syringe is fixed in the needle box by a U-shaped clamp. The top and front end of the needle box are open, and the front end of the syringe faces the front end of the needle box. The rear end plate of the needle box is provided with a threaded push rod. The push rod is coaxial with the piston rod of the syringe and the push rod is fixedly connected to the piston rod.

[0006] As an improvement, there are two U-shaped hoops, which are fixedly connected to the needle box by screws.

[0007] As an improvement, the push rod has a circular plate at the front end and a rotating head at the rear end, and the circular plate is fixedly connected to the piston rod.

[0008] Compared with the prior art, the advantages of this utility model are: it realizes standardized control of injection volume, effectively improves the reproducibility and accuracy of gas chromatography analysis, solves the problem of volume deviation caused by inconsistent propulsion force and stroke in manual injection, and is reproducible, simple and convenient to operate, low cost, and easy to popularize and apply in this field. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings listed below are only some structural schematic diagrams of this utility model, and not all of them.

[0010] Figure 1 This is a schematic diagram of the structure of an auxiliary operating device for a sample injection needle according to this utility model.

[0011] Figure 2 This is a top view of an auxiliary operating device for a sample injection needle according to this utility model.

[0012] Figure 3 This is a cross-sectional view of an auxiliary operating device for a sample injection needle according to this utility model.

[0013] Figure label:

[0014] Syringe 1; Needle box 2; U-shaped clamp 3; Rear end plate 4; Push rod 5; Piston rod 6; Rotary head 7; Threaded tube 8. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of the embodiments of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] Furthermore, the terms "first," "second," and "third" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance. The use of terms such as "horizontal," "vertical," and "suspended" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be perfectly horizontal, but can be slightly tilted.

[0018] In the description of the embodiments of this utility model, the terms "multiple" or "several" refer to at least two.

[0019] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] This embodiment is combined with the appendix Figures 1 to 3 This paper provides a detailed description of an auxiliary operating device for a sample injection needle.

[0021] This embodiment provides an auxiliary operating device for a sample injection needle, including a syringe 1 and a needle box 2. The syringe 1 is fixed in the needle box 2 by a U-shaped clamp 3. The top and front end of the needle box 2 are open, and the front end of the syringe 1 faces the front end of the needle box 2. The rear end plate 4 of the needle box 2 is provided with a threaded push rod 5. The rear end plate 4 has a threaded tube 8. The push rod 5 is inserted into the threaded tube 8 and rotates. The push rod 5 is coaxial with the piston rod 6 of the syringe 1, and the push rod 5 is fixedly connected to the piston rod 6.

[0022] There are two U-shaped hoops 3, and the U-shaped hoops 3 are fixedly connected to the needle box 2 by screws.

[0023] The push rod 5 has a circular plate at the front end and a rotating head 7 at the rear end, and the circular plate is fixedly connected to the piston rod 6.

[0024] In practice, the syringe 1 is connected to the injection tube at its front end, which is connected to the sample liquid. Then, rotating the rotating head 7 pulls the piston rod 6 at a uniform speed, drawing out the sample liquid evenly. The syringe box 2 acts as a fixing seat, stabilizing the pulling action. The stroke and length of the piston rod 6 and the push rod 5 are fixed, thus achieving the same physical injection volume each time. This transforms the uncertain feel of manually pulling the piston rod into a definite and repeatable mechanical stroke, greatly improving reproducibility.

[0025] The present invention and its embodiments have been described above. This description is not restrictive, and the actual scope of protection is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this invention should be included within the scope of protection of this invention. Therefore, the scope of protection of this invention should be determined by the scope of the claims.

Claims

1. A sample injection needle auxiliary operation device, characterized in that, The device includes a syringe (1) and a needle box (2). The syringe (1) is fixed in the needle box (2) by a U-shaped clamp (3). The top and front end of the needle box (2) are open. The front end of the syringe (1) faces the front end of the needle box (2). The rear end plate (4) of the needle box (2) is provided with a threaded push rod (5). The push rod (5) is coaxial with the piston rod (6) of the syringe (1). The push rod (5) and the piston rod (6) are fixedly connected.

2. The auxiliary operating device for a sample injection needle according to claim 1, characterized in that, There are two U-shaped hoops (3), and the U-shaped hoops (3) are fixedly connected to the needle box (2) by screws.

3. The auxiliary operating device for a sample injection needle according to claim 1, characterized in that, The push rod (5) has a circular plate at the front end and a rotating head (7) at the rear end, and the circular plate is fixedly connected to the piston rod (6).

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