Electrically-controlled dropwise adding system for inductive gravity metering

Abstract

The invention relates to an electrically-controlled dropwise adding system for inductive gravity metering. The electrically-controlled dropwise adding system comprises a liquid storage flask (1), a liquid discharge tube (2), an electromagnetic valve (4), a titrating head (6), a wireless transmission module, a titrating cup (9), a balance (10) and a controller (12); the liquid storage flask (1) is connected with the titrating head (6) through the liquid discharge tube (2) and the electromagnetic valve (4), the titrating head (6) is arranged on the titrating cup (9), the wireless transmission module is fixed to a lid of the titrating cup (9), the titrating cup (9) is arranged on the balance, and the controller (12) is connected with the electromagnetic valve (4), the balance (10) and the wireless transmission module separately. Compared with the prior art, the electrically-controlled dropwise adding system has the advantages of being simple in structure, low in failure rate, higher in precision, small in dead volume, capable of saving a standard titrating solution for washing and replacing and the like.

Description

technical field [0001] The invention relates to a titration device, in particular to an electronically controlled dropping system for gravity induction metering. Background technique [0002] A common automatic titrator uses a piston-type liquid filling tube as a titration part. In this device, the signal collected by the indicating electrode is input to the controller, and the controller outputs an electrical signal to the stepping motor, which drives the piston to move forward and backward quantitatively for suction or drop operation, and the consumption volume of the titration solution is determined by the stroke of the piston . Its disadvantage is that the mechanical part is more complicated, prone to failure, and it is not easy to clean when changing the titration solution, and it needs to consume a large amount of standard titration solution. [0003] Chinese patent application 201410113812.7 discloses a hanging mass titration device, which includes an electronic bal...

AI Technical Summary

Problems solved by technology

However, this device also calculates the weight of the titration solution consumed in the titrant bottle with large errors, rather than directly calculating the weight of the solution entering the titration cup; the stress changes of the balance, wires and liquid conduits will be transmitted to the balance, resulting in inaccurate measurement. Accurate and uncontrollable error

The titration head is also an ordinary titration head, the volume of a single drop of solution is 0.05mL, and the accuracy is not high

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