Intelligent adjusting method for air convection in induction furnace during online-moving heating of steel plate
An intelligent adjustment, induction furnace technology, applied in the direction of heat treatment furnace, furnace, furnace type, etc., can solve the real-time adjustment technology of air convection in the induction furnace, without considering the influence of air convection on the heating of the steel plate, the steel plate and the sensor or Sealing device collision and other problems, to achieve the effect of stable heating and temperature uniformity adjustment, improve product heat treatment quality, and good induction heating effect
Active Publication Date: 2016-06-08
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology
[0003] When the steel plate moving continuously on the line is heated in the induction furnace, it may drive the air flow and form air convection in the furnace, especially when the steel plate moves fast, it will promote the heat dissipation on the surface of the steel plate, resulting in a large amount of heat loss
In addition, due to the difference in the moving speed of steel plates of different specifications, the air convection intensity will also change, and the degree of cooling at different positions on the surface of the steel plate will be uneven, resulting in uneven temperature distribution of the steel plate, which will lead to unstable performance of the steel plate, serious Sometimes there will be deformation of the steel plate, which will affect the product quality and increase the follow-up processing procedures, resulting in an increase in production costs.
At present, the method of suppressing air convection in the furnace mainly adopts sealing measures to reduce the inflow and outflow of air in the furnace as much as possible. This measure is suitable for the heating of stationary steel plates, or long continuous steel plates or steel strips. First, the steel plate frequently enters and leaves the induction furnace, and the steel plate has a certain degree of warpage, so the sealing measures at the inlet and outlet of the inductor are difficult to meet the process requirements, and it may also cause the collision between the steel plate and the sensor or sealing device at the entrance and exit. Conducive to the smooth flow of the process
[0004] According to literature and patent searches, the TMCP induction heating furnace adopted in Japanese patents JP2004074277A, JP2002226912A and JP2003082412A did not consider the influence of air convection on steel plate heating
In the existing TMCP induction heating device, there is no report on the real-time adjustment technology of air convection in the induction furnace
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[0027] The present invention will be further described below in conjunction with the drawings and specific embodiments.
[0028] figure 1 Shown is the structure diagram of the heating system of the steel plate on-line mobile heating induction furnace. The system includes: the front roller table 1, the steel plate 2, the induction heating furnace 3, the furnace roller table 5 and the furnace roller table 6. The induction heating furnace includes: an upper sensor 7 and a lower sensor 8. The position of the upper sensor 7 can be adjusted by the upper sensor position adjustment system 4, and the lower sensor 8 is installed on the sensor bracket 9, see figure 2 . There are multiple sets of airflow detection and adjustment systems 10 installed on the inner surface of the upper sensor 7, see image 3 , The airflow detection and adjustment system 10 mainly includes an airflow detection device 12 and an air blowing device 11, and also includes an intelligent processing unit and a PLC cont...
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The invention discloses an intelligent adjusting method for air convection in an induction furnace during online-moving heating of a steel plate. Firstly, the steel plate enters the heating induction furnace through a furnace front roller bed and is heated in the induction furnace, and an air flow detecting device of an air flow detecting and adjusting system mounted on the inner surface of an upper inductor is used for detecting air flowing in the induction furnace in real time and sending detection data to an intelligent processing unit; secondly, the intelligent processing unit is used for working out the air flowing direction and strength in the induction furnace according to the detection data and working out the air flow rate and the acting direction needed for counteracting air flowing, and worked-out results are sent to a PLC control system; thirdly, the PLC control system gives out adjusting commands to an air blowing device of the air flow detecting and adjusting system, and the adjusting commands include the air flow rate command and the air flow direction command; and fourthly, the air blowing device carries out real-time air-blowing adjustment, so that air convection in the furnace is lowered to an allowed range.
Description
Technical field [0001] The invention relates to a control method for an on-line mobile heating induction furnace for steel plates, in particular to a method for regulating air convection in the induction furnace, and is suitable for thermomechanical control technology of medium and thick steel plates. Background technique [0002] With the advancement of science and technology, the scope of material applications continues to expand, and people’s requirements for material properties are becoming more and more stringent. Thermomechanical Control Process (TMCP) has an important influence on the properties of materials. It can realize the production of steel plates with special properties, such as those with excellent welding properties. High-strength steel, steel for high-rise buildings and steel for large ships, etc., can greatly improve the quality of thick plates, and have a significant impact on the performance of thick plates. At present, the latest thick plate TMCP technology ...
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IPC IPC(8): C21D11/00C21D9/00C21D1/42
CPCY02P10/25
Inventor 周月明金小礼吴存有张春伟朱健桦张婷婷
Owner BAOSHAN IRON & STEEL CO LTD
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