Quantitative reagent injection device

Abstract

The invention discloses a quantitative reagent injection device, which comprises a first tube body, a second tube body arranged in the first tube body, a dose adjustment tube for changing the reagent dose, and a dose adjustment tube for inserting into the dose adjustment tube. Hole and pushing device; Described pushing device comprises the first piston that is located in the first pipe body, the second piston that is located in the second pipe body, the first push rod, the second push rod and total push plate; The first push rod One end of the second push rod is fixedly connected with the first piston, one end of the second push rod is fixedly connected with the second piston, and the other end of the first push rod and the other end of the second push rod are fixedly connected with the total push plate. The present invention has the following beneficial effects: the present invention can mix the two evenly by injecting the reagent into the sample, preventing too much toxic reagent from causing harm to the human body or too little reagent is not conducive to sample preservation; inserting the second tube by changing the dosage adjustment tube The depth of the body can adjust the amount of reagents, which can realize the quantitative addition of reagents; the overall operation is convenient.

Description

technical field [0001] The invention relates to the technical field of reagent injection design, in particular to a quantitative reagent injection device capable of uniform mixing of reagents and samples, convenient operation, quantitative addition of toxic reagents, and reduced harm to human bodies. Background technique [0002] When collecting zooplankton at sea, the seawater is filtered through a zooplankton net, packed into a 1L sample bottle, and then added with formaldehyde for fixed preservation. But at present, the staff pour formaldehyde directly into the sample bottle, which leads to too much or too little formaldehyde in the sample bottle. Too little formaldehyde concentration will lead to incomplete preservation of the sample and easy to rot; too much formaldehyde concentration will lead to too high formaldehyde concentration in the sample, and the smell will be pungent during indoor identification. Long-term exposure to this environment will be harmful to the hu...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem of uneven mixing of reagents and samples in the prior art, too little formaldehyde concentration will lead to imperfect preservation of the sample and easy to rot; too much formaldehyde concentration in the sample will lead to too high concentration of formaldehyde, which is harmful to the human body, and provides A quantitative reagent injection device that can mix reagents and samples evenly, is easy to operate, can quantitatively add toxic reagents, and reduce harm to the human body

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