A mechanical arm type solid phase extraction instrument with an injection needle
A technology of injection needles and robotic arms, applied in the field of injection needles, can solve the problems of liquid leakage, insufficient strength, difficulty in balancing strength and toughness, etc.
Active Publication Date: 2018-12-14
JINAN HANON INSTR
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Problems solved by technology
[0002] In the prior art, the injection needle used on the mechanical arm type solid phase extraction instrument includes: a needle plug, a needle stem and a needle point, and the needle stem is made of a thin steel pipe with uniform up and down, and the injection needle is inserted into the solid phase When the through hole of the extraction column (SPE) is used, it is easy to splash liquid from the through hole, resulting in leakage
In addition, the needle shaft is made of steel of the same material. When the strength is high, the toughness is insufficient; when the toughness is high, the strength is insufficient, and it is difficult to balance strength and toughness.
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[0014] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0015] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "vertical", "horizontal", "inner" and "outer" are based on The orientation or positional relationship shown in the drawings is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and opera...
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The invention relates to an injection needle used on a mechanical arm type solid-phase extraction instrument. The injection needle comprises a first steel pipe with the first outer diameter and the first inner diameter and a second steel pipe with the second outer diameter and the second inner diameter, the first steel pipe and the second steel pipe are axially connected in sequence, and the first outer diameter is larger than the second outer diameter to form a step at the connecting position. The injection needle is not prone to liquid leakage and high in strength when used for injecting liquid to a solid-phase extraction column.
Description
technical field [0001] The invention relates to an injection needle used in a mechanical arm type solid phase extraction instrument. Background technique [0002] In the prior art, the injection needle used on the mechanical arm type solid phase extraction instrument includes: a needle plug, a needle stem and a needle point, and the needle stem is made of a thin steel pipe with uniform up and down, and the injection needle is inserted into the solid phase When cleaning the through hole of the extraction column (SPE), it is easy to splash liquid from the through hole, resulting in leakage. In addition, the needle shaft is made of steel of the same material. When the strength is high, the toughness is insufficient; when the toughness is high, the strength is insufficient, and it is difficult to balance strength and toughness. Contents of the invention [0003] The object of the present invention is to provide a mechanical arm type solid phase extraction instrument with an i...
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IPC IPC(8): B01D15/14
CPCB01D15/14
Inventor 王志刚张振方刘一峰虞发海杨水云李婷季金丹
Owner JINAN HANON INSTR