Mechanical lifting start-stop control system for liquidometer water pump

Abstract

The invention relates to a mechanical lifting start-stop control system for a liquidometer water pump. The system comprises a high-level limit switch, a low-level limit switch, a lifting rod, a lifting guide column, an angle guide column, a guide pipe, an acid circulation pit, a pit pump, a water suction pipe, a drainage pipe, a buoy guide barrel, a lifting rod platform, a buoy and a contact. According to the device, the contact triggers high and low limit to give out a pump start-stop signal, and the device is used for achieving the aims of drainage for the acid pickling pit pump and controlover start and stop of the pump and has the advantages of being reliable, stable, simple in structure, convenient to operate and suitable for being applied and installed in a cold rolling acid pickling production line.

Description

technical field [0001] This patent application belongs to the technical field of cold-rolled pickling equipment, and more specifically relates to a start-stop control system for a mechanical lifting liquid level gauge water pump. Background technique [0002] Pickling pits are used to collect spent acid and waste water in any case of spillage. According to the wastewater treatment requirements: the pit has a 2-layer plastic lining, a float type liquid level measuring device, two acid-proof sewage pumps with water tanks. The sewage pump is responsible for discharging the acidic wastewater in the pit to the neutralization station. Due to the low error tolerance rate of the float type liquid level measuring device for controlling the liquid level, false alarms are often made, which affects the output of the sewage pump signal and the drainage effect. And because the pit pump is made of silicon carbide except for the mechanical seal, most of the rest are made of polypropylene ...

AI Technical Summary

Problems solved by technology

(Polypropylene plastic is resistant to acid and corrosion, but its melting point is 164 degrees.) Once the signal to stop the pump is not sent out in time, the pump core of the pit pump will melt due to the high temperature generated by the friction of the silicon carbide mechanical seal, resulting in a production accident.

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