Chemical injection components, designed for the oil exploration and processing industry, are used to quantitatively inject chemical reagents into oil wells, gas wells, and pipelines via air/gas propulsion. They are employed for unblocking and defrosting, restoring the normal operation of oil and gas wells, and can also be used to deliver reaction materials to high-pressure reactors in a quantitative manner. Typically made of 316L or F51 material, they effectively prevent corrosion issues caused by chemical reagents, significantly extending their service life.