Induction heating uniform-temperature cable winding method
A technology of induction heating and heating power supply, applied in induction heating, coil devices, etc., can solve the problems of lack of theoretical support, low efficiency, and no engineering design of induction cables
Pending Publication Date: 2022-07-15
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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Problems solved by technology
However, at present, these parameters only rely on engineering experience, lack of theoretical support, and often require advance experiments and manual adjustments for actual heating, and the efficiency is low; therefore, the present invention intends to combine theoretical formulas to propose an induction coil winding method
[0005] CN111534680A discloses a heating uniform temperature method for local induction heat treatment after welding of thick-walled pressure-bearing equipment, using temperature measuring thermocouples to monitor the temperature of the inner wall and outer wall of the thick-walled cylinder, through the maximum temperature difference T of the inner wall and outer wall of the cylinder and the circumference of the outer wall The directional maximum temperature difference P controls the temperature uniformity of the heating zone, but does not involve the engineering design of the induction cable
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[0048] The present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments:
[0049] The following is an example of a steel container cylinder:
[0050] The inner diameter of the cylinder is 4500mm and the thickness is 268mm. Its process requirements: below 300℃, it is not required to control the heating and cooling rate, and the heating and cooling rate is less than or equal to 55℃ / h; the holding temperature is 705±14℃, and the holding time is 5 hours.
[0051] 1. Heating belt width W p calculate
[0052] Wp=6*0.268*1.35=2.17m;
[0053] 2. Heating power supply power calculation
[0054] Steel specific heat c: 0.46*10 3 J / (kg·℃); density ρ: 7.85g / cm 3 ; Thickness δ=268mm; Inner diameter Inner diameter r 1 =2750mm; outer diameter Outer diameter r 2 = 2884mm;
[0055] The weight of the part to be heated in the cylinder is M:
[0056]
[0057] Substitute the corresponding parameters to get M=99794kg, t...
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Abstract
The invention discloses an induction heating uniform-temperature cable winding method, and belongs to the technical field of local heat treatment. The method specifically comprises the following steps: calculating the width Wp of a heating band; calculating heating power supply power; determining the number N of turns of the cable; determining the width B of the cable; determining a cable turn spacing D; and according to the width Wp of the heating band, the number N of turns of the cable, the width B of the cable and the interval D of the turns of the cable, the cable is wound on the workpiece to form an induction coil. According to known heat treatment requirements, material parameters, process parameters and the like, the parameters, including the number of turns, the coil width and the turn center distance, of the induction coil can be calculated, so that the induction coil can be conveniently used in engineering.
Description
technical field [0001] The invention belongs to the technical field of local heat treatment, and in particular relates to an induction heating cable winding method with uniform temperature. Background technique [0002] With the progress of society and economic development, people's demand for energy has increased sharply, and energy equipment has gradually developed into large-scale and giant-scale. In nuclear power, petrochemical, marine engineering and other fields, thick-walled and large-diameter cylinders are more and more widely used. Such workpieces are often manufactured through the welding process in the production process. During the welding process, due to the large-scale equipment, the degree of restraint is large, and residual stress is easily generated in the welding part, which can seriously lead to deformation or even cracking. Post-weld heat treatment of welded structures is an effective way to reduce residual stress. At present, due to the development of l...
Claims
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Login to View More IPC IPC(8): H05B6/40
CPCH05B6/40
Inventor 蒋文春董丕键谷文斌万娱李滨王金光李志杰杨靖潘晓栋张凯涂善东
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)