Device for automatically checking and controlling acid-base concentration online in etching pipeline

Abstract

The invention discloses a device for automatically checking and controlling acid-base concentration online in an etching pipeline. The device comprises a nitric acid tank, a hydrochloric acid tank, analkali liquid tank, independent self-circulating pumps, corresponding metering pumps, a PLC control system, and an automatic circulation check and control acid-base concentration analysis device. Theautomatic circulation control acid-base concentration analysis device comprises a distilled water pump, a pH buffer solution pump, a NaOH standard solution pump, a concentrated alkali solution pump,a drain pump, a reaction cup, a quantitative loop and a quantitative tube. When detection information is lower than a set value, a concentrated alkali solution extracted by the concentrated alkali solution pump is adjusted to a set value and is transmitted to the PLC control system. The PLC control system sets the working mode of the online automatic check and control acid-base concentration analysis device and automatically controls a corresponding metering pump to add a concentrated acid solution or concentrated alkali solution. When a selected detection object is the nitric acid tank, the hydrochloric acid tank or the alkali liquid tank, the quantitative loop, the reaction cup and a corresponding pipeline are cleaned by the distilled water pump, and a residual liquid in the reaction cupis drained through the drain pump after the cleaning or detection of each time when the alkali liquid tank is selected.

Description

technical field [0001] The invention relates to an on-line automatic detection and control device for acid-base concentration in an erosion assembly line, belongs to the field of physical and chemical detection and quality verification of large wind power gearboxes, and is suitable for corrosion inspection of surface tempering after gear grinding. technical background [0002] If there are grinding burns on the gear parts in the wind power gearbox, because the microstructure of the grinding burns is different, and there must be a large residual stress, the surface quality of the workpiece will be greatly reduced. Therefore, the grinding after the final heat treatment must be Inspection of machined surfaces. Etching inspection (pickling) is an effective method for inspecting grinding burns, the international general standard ISO14104 (corresponding to the national standard GB / T 17879). Among them, the acid-base concentration has a certain range and time requirements. For th...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an online automatic inspection device for acid and alkali concentration in corrosion inspection (pickling) in view of the problem that the manual detection of acid and alkali concentration in pickling is not accurate or has hysteresis

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