Steel pipe induction heating online temperature control method
A technology of induction heating and induction coil, applied in the direction of heat treatment process control, heat treatment furnace, heat treatment equipment, etc., can solve the problems of inaccurate temperature, insufficient heating or over-burning of steel pipes, affecting the processing quality of steel pipes, etc., and achieve the effect of improving product quality.
Inactive Publication Date: 2016-09-28
宁波奉化科创科技服务有限公司
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Problems solved by technology
[0003] In the prior art, the steel pipe temperature is mostly detected by using an infrared temperature sensor to measure the temperature after the steel pipe comes out of the coil. The infrared temperature sensor is generally a certain distance away from the induction coil when it is arranged, and there is often a layer of oxide scale on the surface of the steel pipe. The temperature is very inaccurate, and the method of detecting after leaving the circle cannot be used to control the heating time and temperature of the steel pipe in real time, so there are often insufficient heating or overheating of the steel pipe, which affects the processing quality of the steel pipe. Therefore, an online real-time control method is required. temperature steel pipe induction heating device
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Embodiment 1
[0022] Such as figure 1 As shown, an online temperature control method for steel pipe induction heating uses an induction coil 2 set outside the steel pipe 1 to heat the steel pipe 1 to be heated, including the following steps:
[0023] S1: Set a heated comparison piece 3 at a fixed position outside the induction coil 2, the heated comparison piece 3 is also heated when the induction coil 2 is turned on, and the temperature of the heated comparison piece 3 is monitored in real time by the temperature measuring instrument 4;
[0024] S2: Use a fixed voltage and frequency power supply to conduct a heating test on the induction coil 2; after recording the current room temperature, select a type of steel pipe 1 to be heated as a standard steel pipe, use the induction coil 2 to heat the steel pipe 1 to be heated, and stop after heating for a certain period of time Heating and immediately measuring the temperature of the standard steel pipe and the heated contrast piece 3 at this mo...
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The invention relates to the field of steel pipe heating, in particular to a steel pipe induction heating device. In a steel pipe induction heating online temperature control method, a heated comparing piece is arranged in a fixed position out of an induction coil; a power supply with fixed voltage and frequency is used for supplying electricity to the induction coil for a heating test; different heating times are randomly selected to repeat the step (S2) to obtain a series of corresponding temperatures between a standard steel pipe and the heated comparing piece; the temperatures of the standard steel pipe and the heated comparing piece are fitted to obtain a relation function of the two; and the temperature of a steel pipe to be heated is calculated by real-time monitored temperature of the heated comparing piece, so that the real-time temperature monitoring of the steel pipe to be heated is realized. The steel pipe induction heating online temperature control method measures the temperature of the heated comparing piece without being influenced by the induction coil, can accurately detect the temperature of the heated comparing piece, calculates the present temperature of the steel pipe to be heated by combining with the function relation obtained through the test, realizes online precise control of the temperature of the steel pipe to be heated, and improves the product quality.
Description
technical field [0001] The invention relates to the field of steel pipe heating, in particular to a steel pipe induction heating control method. Background technique [0002] In the field of steel pipe heating, induction heating has been widely used because of its advantages of fast, energy saving, and high efficiency; in the process of steel pipe heating, it is generally necessary to precisely control the heating temperature in order to ensure product quality, so how to accurately detect the heating temperature , and effectively controlling the heating time has become a problem that needs to be solved emphatically. [0003] In the prior art, the steel pipe temperature is mostly detected by using an infrared temperature sensor to measure the temperature after the steel pipe comes out of the coil. The infrared temperature sensor is generally a certain distance away from the induction coil when it is arranged, and there is often a layer of oxide scale on the surface of the ste...
Claims
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IPC IPC(8): C21D9/08C21D1/42C21D11/00
CPCC21D1/42C21D9/08C21D11/00Y02P10/25
Inventor 励彩玲
Owner 宁波奉化科创科技服务有限公司