A retrofitted liquid electrically controlled pneumatic type position controller for a marine shell and tube heater

Abstract

The utility model relates to a kind of for ship shell and tube heater's liquid electric control pneumatic type position controller of additional installation, including mechanical liquid level detection module, pneumatic control module and execution adjustment module, through standardization interface and the butt joint of existing shell and tube heater;Mechanical liquid level detection module includes float ball detection component, float ball detection component includes float ball and vertical guide sleeve, float ball is arranged in vertical guide sleeve;Two flow-through holes are set in the lateral wall of vertical guide sleeve;Pneumatic control module is installed in explosion-proof housing, and mechanical displacement signal is converted into the pneumatic signal of drivable actuating mechanism;Execution adjustment module is installed on the pipeline of condensate outlet of shell and tube heater by standardization flange, and condensate discharge is adjusted by ZJHP pneumatic single seat regulating valve to control liquid level.The utility model is driven only by compressed air, realizes condensate liquid level accurate control, improves heating efficiency and energy recovery, and is suitable for the safe energy-saving reconstruction of ship shell and tube heater.

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