Multi-point sensing and intelligent control method for temperature of gas heating stove

Abstract

The invention discloses a method for multi-point sensing and intelligent controlling of the temperature of a gas heating furnace. The method comprises the following steps: firstly, temperature sensors evenly distributed in a natural gas heating furnace detects the temperature of each point in the heating furnace in a synchronous, real-time and continuous manner; then, an input interface and a data acquisition card transmit the detected temperature signals to an industrial control computer; the industrial control computer calculates, analyzes, and stores the temperature difference between each point and the change rate of the temperature differences through a system control software on a real-time basis, and calculates the integrated temperature in the heating furnace on a real-time basis; finally, whether the temperature of the furnace reaches the set value is judged, and treatment is carried out according to three conditions including reaching the set value, falling short of the set value, and approaching the set value, respectively. The invention can synchronously sense multi-point temperatures in a natural gas heating furnace, display furnace temperature change curves and temperature differences among areas on a real-time basis, and store the temperature change curves of each area in a database on a continuous and real-time basis. The invention adopts a fuzzy-neural network method to adjust each area temperature intelligently, thereby improving the quality of heavy forgings.

Description

technical field [0001] The invention belongs to the technical field of thermal processing of large forgings, in particular to a gas heating furnace for large forgings and a furnace temperature control method. Background technique [0002] Large-scale forging furnaces generally use resistance heating, coal gas and other gases for heating, and the latest ones use natural gas heating, temperature detection and control, and maintaining temperature uniformity is the most important embodiment of the heating quality of heating furnaces and forgings. The heating furnace control system generally only detects the temperature at 1 point (one position) or 2 points (two positions) in the furnace, and displays the detected data, and judges whether the set heating temperature has been reached based on the detected data. For the resistance heating furnace, if the set temperature has been reached, the control system will stop the power supply to the resistance heating furnace. If the set tem...

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Problems solved by technology

[0003] In short, the defects of the existing technology are: (1), the difference and uniformity of the temperature in the furnace cannot be effectively detected, (2), the temperature of different parts cannot be adjusted in real time through the detection data, so as to ensure the temperature uniformity of the heating furnace

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