Sample injection needle for manual sample injector

Abstract

The utility model provides a sample injection needle for a manual sample injector, which belongs to the technical field of sample injection needles and comprises a stainless steel body. The gas buffer bin sealing cover is in threaded connection with one side of the stainless steel body through bolts; the long and thin sample injection needle and the short and thick sample injection needle are both positioned in the stainless steel body; according to the design of the sample injection needle for the manual sample injector, the double-needle configuration of the long and thin sample injection needle and the short and thick sample injection needle is adopted, and a precise manual screw fine adjustment mechanism is combined, so that the accurate control on the sample volume can be realized, and the accuracy of experimental data is greatly improved; the fixed connection design of the sample injection needle holder ensures the stability and the positioning accuracy of the sample injection needle in the use process, errors caused by misoperation or mechanical instability are reduced, and compared with the installation space, the sample injection needle holder is small in installation space and suitable for different sampling work.

Description

Technical Field

[0001] The utility model belongs to the technical field of sampling needles, and particularly relates to a sampling needle for a manual injector. Background Art

[0002] An electronic nose is an instrument that mimics the human olfactory system. It uses a series of gas sensors to detect and identify different odors. These sensors usually respond to specific volatile organic compounds (VOCs) and can convert odor signals into electrical signals, which are then analyzed by pattern recognition algorithms to identify or classify the odor sources.

[0003] The patent document with the publication number "CN215115343U" records "An adjustable nucleic acid solution positioning injector, which relates to the technical field of nucleic acid solutions. The adjustable nucleic acid solution positioning injector includes a syringe housing. A needle is provided at the bottom of the syringe housing, and a piston and a limit disk are provided inside the syringe housing. The outer walls of the piston and the limit disk are both in contact with the inner wall of the syringe housing. This adjustable nucleic acid solution positioning injector can adjust the liquid phase volume value of the injector, so as to achieve the effect of quantitative and positioning when injecting nucleic acid solution. Compared with the traditional injector, on the one hand, there is no need to deliberately control the amount of nucleic acid solution injection, thus effectively improving the injection efficiency. On the other hand, it avoids the problem that it is easy to be inaccurate when manually controlling the amount of injection, relatively improving the accuracy of the injection value and the practicability of the injector. Moreover, the injector has a clever structure design, low cost, and simple operation, which is convenient for popularization and use."

[0004] The injection of the electronic nose manual injector is restricted by the sample bottle specifications, the injection needle spacing is limited, and restricted by the electronic nose intake pipe system, the injection needle outlet requires a relatively large installation space, and the use effect is not good. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a sampling needle for a manual injector, aiming to solve the problems in the prior art that the injection of the electronic nose manual injector is restricted by the sample bottle specifications, the injection needle spacing is limited, restricted by the electronic nose intake pipe system, the injection needle outlet requires a relatively large installation space, and the use effect is not good.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A sampling needle for a manual injector, comprising:

[0008] A stainless steel body;

[0009] A gas buffer chamber sealing cover, which is threadedly connected to one side of the stainless steel body by bolts;

[0010] A slender sampling needle and a short and thick sampling needle, both the slender sampling needle and the short and thick sampling needle are located inside the stainless steel body;

[0011] Two screws, both of the two screws are threadedly connected to the gas buffer chamber sealing cover and the stainless steel body;

[0012] A sampling needle holder, the sampling needle holder is fixedly connected to the lower end of the stainless steel body;

[0013] A sample receiving gas pipeline and a zero connection gas pipeline, both the sample receiving gas pipeline and the zero connection gas pipeline are located on the other side of the stainless steel body;

[0014] Two sampling holes, the two sampling holes are respectively opened on the circumferential surfaces of the slender sampling needle and the short and thick sampling needle.

[0015] As a preferred solution of the present utility model, the gas buffer chamber sealing cover and the stainless steel body have the same volume and are in close fit.

[0016] As a preferred solution of the present utility model, the slender sampling needle and the short and thick sampling needle penetrate through the sampling needle holder and are butted with the stainless steel body.

[0017] As a preferred solution of the present utility model, the corners of the stainless steel body and the gas buffer chamber sealing cover are designed with rounded corners.

[0018] As a preferred solution of the present utility model, the distance between the sample receiving gas pipeline and the zero connection gas pipeline is 2 cm.

[0019] Compared with the prior art, the beneficial effects of the present utility model are:

[0020] 1. In this solution, the design of the sampling needle of this manual sampler, by adopting the double-needle configuration of a slender sampling needle and a short and thick sampling needle, combined with a precise hand-tightening screw fine-tuning mechanism, can achieve precise control of the sample volume, greatly improving the accuracy of experimental data. In addition, the fixed connection design of the sampling needle holder ensures the stability and positioning accuracy of the sampling needle during use, reducing errors caused by improper operation or mechanical instability. Compared with a smaller installation space, it is suitable for different sampling operations.

[0021] 2. In this solution, the close fit between the gas buffer chamber sealing cover and the stainless steel body, as well as the rounding treatment of the corners, improves the sealing performance and corrosion resistance of the components, and also greatly reduces the safety hazards of operators during use. Description of the Drawings

[0022] The accompanying drawings are used to provide a further understanding of the present utility model and form a part of the description. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0023] Figure 1 is the front perspective view of the present utility model;

[0024] Figure 2 of the present utility model Figure 1 is the partial enlarged view at position A.

[0025] In the figure: 1, stainless steel body; 2, gas buffer chamber sealing cover; 3, screw; 4, sample connection gas pipeline; 5, zero connection gas pipeline; 6, sample injection needle holder; 7, slender sample injection needle; 8, short and thick sample injection needle; 9, sampling hole. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] Embodiment 1

[0028] Please refer to Figure 1 - Figure 2 , the present utility model provides the following technical solutions:

[0029] A sample injection needle for a manual injector, comprising:

[0030] A stainless steel body 1;

[0031] A gas buffer chamber sealing cover 2, which is threadedly connected to one side of the stainless steel body 1 through bolts;

[0032] A slender sample injection needle 7 and a short and thick sample injection needle 8, both of which are located inside the stainless steel body 1;

[0033] Two screws 3, both of which are threadedly connected inside the gas buffer chamber sealing cover 2 and the stainless steel body 1;

[0034] A sample injection needle holder 6, which is fixedly connected to the lower end of the stainless steel body 1;

[0035] A sample connection gas pipeline 4 and a zero connection gas pipeline 5, both of which are located on the other side of the stainless steel body 1;

[0036] Two sampling holes 9 are respectively opened on the circumferential surfaces of the slender sampling needle 7 and the short and thick sampling needle 8.

[0037] In a specific embodiment of the present utility model, the stainless steel body 1 serves as the basic structure, and its material is selected as stainless steel material with corrosion resistance and high strength, ensuring the durability and stability of the component. The gas buffer chamber sealing cover 2 is installed on one side of the stainless steel body 1 through four bolts to form a closed gas buffer chamber, effectively isolating external environmental interference and ensuring the purity of the sampling process. The slender sampling needle 7 and the short and thick sampling needle 8 are embedded inside the stainless steel body 1. Two screws 3 are used to finely adjust the positions of the slender sampling needle 7 and the short and thick sampling needle 8 to achieve precise control of the sample volume. The sampling needle holder 6 ensures the stability and positioning accuracy of the sampling needle during use, avoiding sampling errors caused by external forces. The sample gas pipeline 4 and the zero gas pipeline 5 are respectively used for introducing sample gas and supplementing zero gas, ensuring the air flow balance and measurement accuracy during the sampling process. The sampling holes 9 ensure the accuracy and consistency of sample collection. This device can finely adjust the positions of the slender sampling needle 7 and the short and thick sampling needle 8, which is convenient for manual adjustment. Compared with a smaller installation space, it is applicable to different sampling operations.

[0038] For details, please refer to Figure 1 - Figure 2 , the gas buffer chamber sealing cover 2 has the same volume as the stainless steel body 1 and fits closely.

[0039] In this embodiment: The gas buffer chamber sealing cover 2 has the same volume as the stainless steel body 1. When they fit closely, a seamless connection is formed. Through precision machining, the flatness and sealing performance of the contact surface between the two are ensured, thereby effectively isolating the external environment and protecting the internal gas from pollution.

[0040] For details, please refer to Figure 1 - Figure 2 , the slender sampling needle 7 and the short and thick sampling needle 8 penetrate through the sampling needle holder 6 and are docked with the stainless steel body 1.

[0041] In this embodiment: The sampling needle holder 6 is designed with precise guiding holes, which facilitate the slender sampling needle 7 and the short and thick sampling needle 8 to pass through it, and at the same time ensure their precise docking with the stainless steel body 1, greatly improving the stability of the sampling needle during operation and reducing errors caused by external forces or vibrations.

[0042] For details, please refer to Figure 1 - Figure 2 , the corners of the stainless steel body 1 and the gas buffer chamber sealing cover 2 are designed as rounded corners.

[0043] In this embodiment: After the rounding treatment, the edges are no longer sharp, reducing the risk of accidental injury to the operator during use, and also making cleaning and maintenance easier.

[0044] For details, please refer to Figure 1 - Figure 2, the distance between the sample connection gas pipeline 4 and the zero connection gas pipeline 5 is 2 cm.

[0045] In this embodiment: The operation convenience of the sampling needle assembly for the manual sampler and the rationality of the space layout are improved, and the safety and reliability of its experimental operation are also enhanced, creating a more efficient, safe and easy-to-manage working environment for laboratory staff.

[0046] The working principle and usage process of the present utility model: The gas buffer chamber sealing cover 2 is installed on one side of the stainless steel body 1 through four bolts to form a closed gas buffer chamber. The slender sampling needle 7 and the short and thick sampling needle 8 are embedded inside the stainless steel body 1. Two screws 3 are used to finely adjust the positions of the slender sampling needle 7 and the short and thick sampling needle 8 to achieve precise control of the sample volume. The sampling needle holder 6 ensures the stability and positioning accuracy of the sampling needle during use. The sample connection gas pipeline 4 and the zero connection gas pipeline 5 are respectively used for the introduction of sample gas and the supplement of zero gas to ensure the air flow balance and measurement accuracy during the sampling process. The device can finely adjust the positions of the slender sampling needle 7 and the short and thick sampling needle 8, which is convenient for manual adjustment and has a relatively small installation space.

[0047] Finally, it should be noted that: The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A manual sample injector needle, characterized in that: include: Stainless steel body (1); A gas buffer chamber sealing cover (2), wherein the gas buffer chamber sealing cover (2) is threadedly connected to one side of the stainless steel body (1) via bolts; A slender injection needle (7) and a short and thick injection needle (8), wherein the slender injection needle (7) and the short and thick injection needle (8) are both located in the stainless steel body (1); Two screws (3), both of which are threadedly connected to the gas buffer chamber sealing cover (2) and the stainless steel body (1); An injection needle holder (6), the injection needle holder (6) being fixedly connected to the lower end of the stainless steel body (1); A sample gas pipeline (4) and a zero gas pipeline (5), wherein the sample gas pipeline (4) and the zero gas pipeline (5) are both located on the other side of the stainless steel body (1); Two sampling holes (9), the two sampling holes (9) are respectively opened on the circumferential surface of the slender sampling needle (7) and the short and thick sampling needle (8).

2. The manual sample injector needle according to claim 1, characterized in that: The gas buffer chamber sealing cover (2) is consistent in volume with the stainless steel body (1) and fits closely to the stainless steel body (1).

3. The manual sample injector needle according to claim 2, characterized in that: The slender injection needle (7) and the short thick injection needle (8) penetrate the injection needle holder (6) and are connected to the stainless steel body (1).

4. The manual sample injector needle according to claim 3, characterized in that: The corners of the stainless steel body (1) and the gas buffer chamber sealing cover (2) are rounded.

5. The manual sample injector needle according to claim 4, characterized in that: The distance between the sample gas pipeline (4) and the zero gas pipeline (5) is 2 cm.

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