Steel pipe layer-by-layer cooling device and method
A cooling device and steel pipe technology, applied in furnaces, heat treatment equipment, heat treatment furnaces, etc., can solve problems such as large regional temperature gradients, inability to obtain high-quality pipes, and unsatisfactory effects, and achieve large temperature gradients, improve uneven cooling, The effect of saving consumption
Active Publication Date: 2021-01-29
西安文丰钢铁实业有限公司
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Problems solved by technology
Using the current common cooling method for straight seam welded pipes, the temperature gradient in the heat-affected zone of the weld seam after cooling is too large, and the effect is not ideal, so that high-quality pipes cannot be obtained in the future
Method used
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Embodiment Construction
[0041] Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0042] Such as figure 1 As shown, the present invention provides a steel pipe layer-by-layer cooling device, which includes an air pump 10, a cooling box 8, a computer 12, a welded pipe 4 and a cylinder conveyor 2; the computer 12 is arranged on the console 11; the cylinder conveyor 2 is used for the welded pipe 4 transportation; the welding seam 3 of the welded pipe 4 is located directly above it, and the two sides of the welding seam are located in a pair of extrusion rollers 6, and the upper and lower ends of the vertical roller shaft 5 of the extrusion roller 6 are respectively installed in the cooling box 8 ; There are n rows of air inlets 9 above the cooling box 8 ;
[0043] Such as Figure 2 ~ Figure 3 As shown, in the temperature measuring and cooling device 7, the gas collecting box 19 is used to store the cooling gas; every row of air inlets 9 of the cooling...
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The invention relates to a steel pipe layer-by-layer cooling device and method. The steel pipe layer-by-layer cooling device comprises an air pump, a cooling box, a computer, a welded pipe and a cylinder conveyor; at the inner side of the cooling box, a temperature measuring and cooling device is arranged right above a welding seam; an infrared thermometer is arranged at the left end of the device, a gas collection box at the upper end is used for storing cooling gas, and a gas distribution cavity is formed below the gas collection box; a stepping motor corresponding to the gas distribution cavity is arranged at one side of the gas distribution cavity; the computer pushes an air cavity baffle to slide by controlling rotation of the stepping motor and a lead screw, so that air injection holes are shielded; and the other side of the air cavity baffle is fixedly connected with a spring, and a pressure sensor is arranged on a supporting plate connected with the spring. Through linkage of the computer and the temperature measuring and cooling device, a layered and regional cooling method is adopted, the cooling uniformity of a weld joint heat affected zone is improved, and the cooling effect is improved.
Description
technical field [0001] The invention relates to the field of steel pipe production, in particular to a layer-by-layer cooling device and cooling method for the heat-affected zone of a weld seam of a straight seam welded pipe. Background technique [0002] As an economical section steel, steel pipe is widely used in the manufacture of mechanical parts and engineering structures. Steel pipes are divided into two categories: seamless steel pipes and welded steel pipes (seamed pipes). Longitudinal welded pipe is a steel pipe welded by hot-rolled or cold-rolled steel strip or steel plate after crimping and forming. The welded part of the steel pipe is in a straight line. The temperature distribution in the cross-section of the weld heat-affected zone of the newly welded longitudinal seam welded pipe is uneven, and the temperature field is in the shape of an "hourglass" symmetrical on both sides. The maximum temperature in the heat-affected zone of the weld seam can reach above ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C21D9/08C21D9/50C21D11/00
CPCC21D9/085C21D9/505C21D11/00
Inventor 刘丰杨帅
Owner 西安文丰钢铁实业有限公司