A Coordinated Control System and Method for Multiple Hot Air Circulating Furnaces
A technology of coordinated control system and hot air circulation, applied in furnace control devices, furnaces, furnace components, etc., can solve the problems of inability to achieve both temperature cycle control and target temperature control, and large fluctuations in processing effects, reducing product quality fluctuations. Small, reduce the effect of effect fluctuations
Active Publication Date: 2019-03-22
TSINGHUA UNIV
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Problems solved by technology
[0003] In view of the above problems, the purpose of the present invention is to provide a coordinated control system and method for multiple hot air circulating furnaces, which is used to solve the contradiction between the temperature cycle control and the target temperature control of the traditional hot air circulating furnace temperature control method, and to solve the problem of multiple hot air circulating furnaces. The problem of large fluctuations in cumulative processing effect when hot air circulation furnace is processed in series
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[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0026] Such as figure 1 As shown, the present invention provides a coordinated control system for multiple hot blast circulating furnaces, which includes industrial controllers, thermal sensors, analog transmitters and digital transmitters; There are thermal sensors, analog transmitters and digital transmitters, and the thermal sensors, analog transmitters and digital transmitters installed on each controlled hot air circulation furnace constitute a coordinated control branch, and each coordinated control branch passes through The industrial bus is connected to the industrial controller in parallel; all controlled hot air circulation furnaces are connected in series.
[0027] The thermal sensor is installed at the air outlet of the burner of each controlled hot air circulation furnace that needs coordinated control, and is used to measure the tempera...
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The invention relates to a coordinated control system and method for multiple hot air circulation furnaces. The system comprises heat sensors, each heat sensor is mounted at an air outlet of a combustor of the corresponding controlled hot air circulation furnace, and measured circulating gas temperature signals, obtained after heating of the combustors, are transmitted to analog quantity transmitters. The analog quantity transmitters convert the signals output by the heat sensors into industrial bus signals. The output end of each analog quantity transmitter is connected with the input end of a corresponding digital quantity transmitter and the output end of the analog quantity transmitter through an industrial bus in parallel and then connected to an industrial controller, and the industrial bus signals are transmitted to the industrial controller. The input end of each digital quantity transmitter is connected with the output end of the industrial controller through an industrial bus, and the digital quantity transmitters convert received industrial bus control signals into switching quantity digital signals capable of being recognized by the combustors used for the controlled hot air circulation furnaces. The output end of each digital quantity transmitter is connected with the corresponding combustor. According to the coordinated control system and method, the effect of reducing machining effect fluctuation of the hot air circulation furnaces in series connection can be achieved, and quality fluctuation of machined products of the hot air circulation furnaces in series connection is reduced.
Description
technical field [0001] The invention relates to a control system and method in the field of processing and manufacturing, in particular to a coordinated control system and method for multiple hot air circulation furnaces. Background technique [0002] In the processing and manufacturing industry, hot air circulating furnaces in series are often used to process products that require continuous aging treatment at different temperatures. For example, in the production process of non-combustible metal composite panels, multiple hot air circulating furnaces are often used for continuous processing bake. In the existing control method, the temperature in each hot air circulating furnace is individually controlled using methods such as PID, which makes it impossible to guarantee the same temperature cycle in each hot air circulating furnace, which in turn causes some products to experience multiple furnaces during processing. The high temperature time period of the hot air circula...
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IPC IPC(8): F27D19/00
CPCF27D19/00F27D2019/0003
Inventor 都东戢仁和王力常保华
Owner TSINGHUA UNIV