Sampling needle and sample analyzer

Abstract

The utility model provides a sampling needle and a sample analyzer, and belongs to the technical field of sample analysis equipment. The sampling needle comprises a tubular needle body, an end hole communicated with the hollow inside of the needle body is formed in the head end of the needle body, and a side hole communicated with the hollow inside of the needle body is formed in the side wall of the needle body. According to the sampling needle, the end hole communicated with the hollow inside of the needle body is formed in the head end of the needle body, and the side hole communicated with the hollow inside of the needle body is formed in the side wall of the needle body, so that when the head end of the needle body extends into a sample container and the sampling needle sucks and spits a sample, the suction and spitting resistance of the sample can be reduced by the side hole, and the suction and spitting of the sample can be smoothly carried out; the uniform suction and spitting mixing effect is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of sample analysis equipment, in particular to a sampling needle and a sample analyzer. Background Art

[0002] A sampling needle is usually provided in a sample analyzer for sampling samples for testing. Before sampling, the sample usually needs to be mixed to avoid sedimentation of the sample due to standing for too long, which causes the test results of the sample to be inconsistent with the state of the actual sample. When mixing the sample, the sampling needle is usually used to directly mix the sample. The mixing methods of the sampling needle usually include bubbling mixing and suction mixing. Bubbling mixing is to insert the sampling needle into the sample and fill the sample with gas. After the gas enters the sample, bubbles are formed. The bubbles disturb the sample during the rising and bursting process, thereby mixing the sample. Suction mixing is to suck the sample into the sampling needle and then spit the sample out again. The sample is mixed during the suction process. During the mixing process, since some substances in the sample, such as solids, are deposited at the bottom of the sample container, the sampling needle usually needs to be inserted deeper into the sample container to approach the bottom of the sample container, thereby improving the mixing effect of the sample. However, the opening of the existing sampling needle is usually set at the head end of the needle body. When the head end of the needle body extends further into the sample container and is closer to the bottom of the sample container, the gap between the opening and the bottom of the sample is small, resulting in large ventilation resistance or suction resistance, affecting the mixing effect. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a sampling needle and a sample analyzer to solve the problems of large ventilation resistance or suction resistance and poor mixing effect when the sampling needle is extended far into the sample container in the prior art.

[0004] To achieve the above-mentioned purpose and other related purposes, the present invention provides a sampling needle for bubble mixing and suction and exhalation mixing, comprising a tubular needle body, a head end of the needle body being provided with an end hole connected to the hollow interior of the needle body, and a side hole connected to the hollow interior of the needle body being provided on the side wall of the needle body.

[0005] Optionally, the boundary of the side hole is connected to the boundary of the end hole.

[0006] Optionally, the side hole and the end hole are integrated into an end hole, and the boundary of the end hole is smooth and continuous.

[0007] Optionally, there are two or more side holes.

[0008] Optionally, the side holes are evenly distributed around the length direction of the needle body.

[0009] Optionally, the distance between the side hole and the needle head in the length direction of the needle body is ≤1 mm.

[0010] Optionally, the distance between the side hole and the needle head in the length direction of the needle body is 0.5 mm.

[0011] Optionally, the side hole area is smaller than or equal to the end hole area.

[0012] The utility model also provides a sample analyzer, comprising a sampling needle, a syringe for aspirating, mixing and / or sampling, and a mixing unit for providing positive pressure gas, wherein the syringe and the mixing unit are respectively connected to the sampling needle.

[0013] Optionally, the sampling needle is the sampling needle described above.

[0014] As described above, the sampling needle and sample analyzer of the present invention have the following beneficial effects: an end hole connected to the hollow interior of the needle body is provided on the head end of the needle body, and a side hole connected to the hollow interior of the needle body is provided on the side wall of the needle body. When the head end of the needle body extends further into the sample container, the sampling needle aspirates and exhales the sample or introduces gas into the sample container, the side hole can reduce the aspiration resistance of the sample or the resistance to gas introduction, so that the sample mixing can proceed smoothly and the mixing effect is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the sampling needle end in an embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the side hole in the embodiment of the present utility model;

[0017] Figure 3 This is the second structural diagram of the side hole in the embodiment of the present utility model.

[0018] Description of the accompanying drawings: needle body 1, end hole 10, side hole 11. DETAILED DESCRIPTION

[0019] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0020] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology, and are not used to limit the conditions for implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose of the present invention. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be considered as the scope of implementation of the present invention without substantially changing the technical content.

[0021] See also Figures 1 to 3 This embodiment provides a sampling needle for bubble mixing and suction mixing. The sampling needle includes a tubular needle body 1. The tip of the needle body 1 is provided with an end hole 10 that communicates with the hollow interior of the needle body 1. The side wall of the needle body 1 is provided with a side hole 11 that communicates with the hollow interior of the needle body 1.

[0022] In this embodiment, the boundary of the side hole 11 is connected to the boundary of the end hole 10. After the boundary of the side hole 11 is connected to the boundary of the end hole 10, the side hole 11 and the end hole 10 are connected as a whole. Without reducing the opening size of the side hole 11, the distance between the side hole 11 and the end surface of the head end is reduced, which helps the side hole 11 to be as close to the bottom of the sample as possible during aspiration and mixing, thereby ensuring a uniform mixing effect.

[0023] Specifically, in this embodiment, the side hole 11 and the end hole 10 are integrated to form an end hole, and the boundary of the end hole is smooth and continuous. The smooth and continuous boundary of the end hole is convenient for processing the end hole and also helps to reduce the resistance of the sampling needle when aspirating and mixing.

[0024] The side hole 11 can be in various shapes such as rectangular, semi-elliptical, etc. Figure 2 As shown, the side hole 11 can also be semi-circular to reduce stress concentration at the edge of the side hole 11. Figure 3 As shown, in this embodiment, the side hole 11 is semicircular, which reduces stress concentration at the edge of the side hole 11. At the same time, the semicircular hole can be directly formed by drilling, and the process is simple.

[0025] There are two or more side holes 11. Increasing the number of side holes 11 is beneficial to increasing the flow area between the tip of the needle body 1 and the sample being sucked and exhaled, which is beneficial to further reducing the resistance of the sampling needle when sucking and exhaling the sample, and maximizing the flow capacity of the hollow space inside the needle body 1.

[0026] In this embodiment, the side holes 11 are evenly distributed along the length of the needle body 1 , so that the sample can evenly enter and exit the sampling needle through the side holes 11 , which is beneficial for mixing the sample during the aspiration process.

[0027] If there are too many side holes 11 , the difficulty and complexity of processing the side holes 11 will increase accordingly. Therefore, in this embodiment, there are two side holes 11 , and the two side holes 11 are relatively arranged on the side wall of the head end of the needle body 1 .

[0028] If the side hole 11 is too far from the tip end, when the sampling needle is inserted into the sample container, the maximum distance between the edge of the side hole 11 and the tip end of the needle body 1 along the length of the needle body 1 increases. This increases the distance between the bubble discharge point and the bottom of the sample container during foaming and mixing, and the mixing effect of the sampling needle during foaming and mixing will be correspondingly reduced. In this embodiment, to ensure that the side hole 11 is as close as possible to the bottom of the sample container, the maximum distance between the edge of the side hole 11 and the tip end of the needle body 1 along the length of the needle body 1 is h, and h ≤ 1 mm to ensure a good mixing effect.

[0029] Specifically, in this embodiment, the maximum spacing h between the boundary of the side hole 11 and the tip of the needle body 1 along the length of the needle body 1 is 0.5 mm. In actual situations, the maximum spacing h between the boundary of the side hole 11 and the tip of the needle body 1 along the length of the needle body 1 should not be too small to avoid the area of ​​the side hole 11 being too small and thus affecting gas inflow or sample aspiration.

[0030] If the area ratio between the side hole 11 and the end hole 10 is too large, the needle body 1 tip end strength is insufficient and difficult to process. In this embodiment, the area of ​​the side hole 11 needs to be less than or equal to the area of ​​the end hole 10 to ensure the strength of the needle body 1 tip end.

[0031] This embodiment also provides a sample analyzer, comprising a sampling needle and a syringe for aspirating or drawing a sample, the syringe being connected to the sampling needle. The syringe can be used to extract the sample to complete sampling, and the syringe can also be used to aspirate and draw the sample to complete sample mixing.

[0032] In summary, the sampling needle and sample analyzer of this embodiment have an end hole 10 on the tip of the needle body 1 that is connected to the hollow interior of the needle body 1, and a side hole 11 on the side wall of the needle body 1 that is connected to the hollow interior of the needle body 1. The side hole 11 can reduce the resistance to sample aspiration and gas introduction. When the tip of the needle body 1 extends further into the sample container, or even when the tip of the needle body 1 contacts the bottom of the sample container, the sampling needle can still aspirate and introduce gas into the sample, allowing the sample to be mixed smoothly and ensuring a mixing effect. At the same time, the side hole 11 also reduces the need for precision control of the depth of the sampling needle's insertion into the sample container, which helps reduce the overall cost of the analyzer needle.

[0033] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A sampling needle, characterized in that: The invention is used for bubble mixing and suction and exhalation mixing, and comprises a tubular needle body, wherein the head end of the needle body is provided with an end hole connected to the hollow interior of the needle body, and the side wall of the needle body is provided with a side hole connected to the hollow interior of the needle body.

2. The sampling needle according to claim 1, characterized in that: The boundary of the side hole is in communication with the boundary of the end hole.

3. The sampling needle according to claim 2, characterized in that: The side hole and the end hole are integrated into an end hole, and the boundary of the end hole is smooth and continuous.

4. The sampling needle according to any one of claims 1 to 3, characterized in that: There are two or more side holes.

5. The sampling needle according to claim 4, characterized in that: The side holes are evenly distributed along the length of the needle body.

6. The sampling needle according to claim 1, characterized in that: The maximum distance between the side hole boundary and the needle head in the length direction of the needle body is ≤1 mm.

7. The sampling needle according to claim 6, characterized in that: The maximum distance between the side hole boundary and the needle head end in the length direction of the needle body is 0.5 mm.

8. The sampling needle according to claim 1, characterized in that: The side hole area is smaller than or equal to the end hole area.

9. A sample analyzer, characterized in that: It comprises a sampling needle, a syringe for aspirating, mixing and / or sampling, and a mixing unit for providing positive pressure gas. The syringe and the mixing unit are respectively connected to the sampling needle.

10. The sample analyzer according to claim 9, wherein: The sampling needle is the sampling needle according to any one of claims 1 to 8.

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