Corrosion-resistant ultra-trace metal impurity program-controlled injection pump system
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A metal impurity, ultra-trace technology, applied in the field of syringe pump systems, can solve the problems of metal impurity pollution, easy to be corroded, difficult to meet strong chemical corrosion resistance, etc.
Active Publication Date: 2019-01-18
SICHUAN UNIV
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Some special fluid application fields (semiconductor, geochemistry, life science, etc.) require fluid equipment to have the ability to resist strong chemical corrosion (nitric acid, hydrochloric acid, sulfuric acid, hydrofluoric acid, etc.), and at the same time have ultra-trace metal impurities. Syringe pumps are difficult to meet the above requirements
Mainly because it is difficult for glass, quartz, ceramics, and metals to meet strong chemical corrosion resistance. For example, hydrofluoric acid will corrode glass, ceramics, and
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[0026] In order to better understand the content described in the present invention, the system structure and working principle of the present invention are described in detail below.
[0027] The syringe barrel 1 of the system is made of polymer materials (fluorine-containing plastics, polypropylene, etc.) that are resistant to strong chemical corrosion, and the outer side of the syringe barrel is covered with a syringe barrel fixing sleeve 2 to prevent the syringe barrel from moving up and down and the polymer material syringe barrel. deformation to ensure the accuracy of fluid injection; the syringe barrel fixing sleeve 2 is made of polymer material with high mechanical strength, and its thickness is thick to ensure its mechanical strength; the syringe barrel fixing sleeve 2 is an external thread 15 (such as Figure 2A and Figure 2B As shown), so that it can be screwed into the sealing shell 11 of the system, and when it is screwed, the outer edge of the lower end of the s...
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Abstract
The invention relates to the field of fluid, in particular to a corrosion-resistant program-controlled injection pump system. The injection pump system consists of a syringe and a driving stepping motor thereof. Components in the system contacting with the fluid are all made of a high molecular material resistant to chemical corrosion (containing fluoroplastic, polypropylene, polyphenylene sulfide, polyetheretherketone or polyethylene and the like). The system is composed of at least a syringe with a channel, a driving stepping motor and a set of mechanical transmission components. The drivingstepping motor is programmed to achieve automated operation. Metal components in the system are enclosed in a box body made of a corrosion-resistant polymer material and are relatively isolated fromthe external environment so that the metal components are prevented from being corroded.
Description
technical field [0001] The invention relates to the field of fluids, in particular to a syringe pump system with chemical corrosion resistance, ultra-trace metal impurities and program control. Background technique [0002] Syringe pump systems are widely used in analytical chemistry, environmental science, chemical industry, environmental protection, food, clinical medicine and life sciences and other fields. The materials of the syringe barrels of the existing syringe pumps include glass, quartz, ceramics, metals, plastics, etc., and the materials of the pistons include glass, ceramics, rubber, and the like. Some special fluid application fields (semiconductor, geochemistry, life science, etc.) require fluid equipment to be resistant to strong chemical corrosion (nitric acid, hydrochloric acid, sulfuric acid, hydrofluoric acid, etc.), and have ultra-trace metal impurities. Syringe pumps are difficult to meet the above requirements. Mainly because glass, quartz, ceramics,...
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Application Information
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