Strip Cooling Spray Header and Its Installation Structure Between Rolling Mill Stands

Abstract

The invention discloses a cooling and spraying header for steel strips between rolling mill frames and a mounting structure thereof. The cooling and spraying header comprises a collecting pipe and multiple nozzle pipes; the collecting pipe is a section of axial symmetry curve represented by the central axis thereof and cut from a conical curve; the ratio of the length of the collecting pipe alongthe symmetric axis to the opening width is 0.05-0.25; and the multiple nozzle pipes are arranged along the projected side of the collecting pipe, and are inclined to one side of the plane of the central axis of the collecting pipe, so that an included angle alpha between the central axis in outlets of the nozzle pipes and the plane of the central axis of the collecting pipe is 15-60 degrees. During mounting, two sets of cooling and spraying headers are adopted, and are mounted at the upper parts and the lower parts of the steel strips; and the symmetric axes of the cooling and spraying headersand the middle lines of steel plates are on the same vertical surface. The problems of nonuniform distribution of the transverse temperature of the steel strips and quicker edge temperature drop canbe solved.

Description

Technical field [0001] The invention relates to a steel belt cooling device, in particular to a steel belt cooling spray header between rolling mill stands and an installation structure thereof. Background technique [0002] The final rolling temperature control accuracy of hot strip is a key indicator of the performance of the strip. In order to ensure the final rolling temperature, higher requirements are placed on the cooling water system between the stands. The cooling water system between the hot strip mill stands not only improves the surface quality of the steel strip, but also prevents secondary scale formation. However, during the cooling process of the steel strip, due to the faster edge cooling, the transverse temperature of the steel strip will be inconsistent, resulting in edge waves after the steel strip is cooled. This phenomenon is especially obvious when rolling thin steel strips. For this reason, it is necessary to reduce the temperature drop at the edge of th...

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Problems solved by technology

[0003] Chinese patent ZL201310311026.3 uses cooling water headers and baffle plates to control the cooling speed of the steel belt, but it is only for the control of the belt head and tail, and the temperature control effect on the belt body is not obvious

Chinese patent ZL201521074176.8 uses an adjustable nozzle to adjust the spray angle, thereby controlling the cooling speed of the steel strip in the transverse direction. Its shortcoming is that this patent uses a straight spray header, and the distance between the nozzle and the spray point cannot be adjusted. , the injection pressure cannot be adjusted, and at the moment of injection start and stop, the adjustment mechanism receives a huge impact force, and the equipment failure rate increases significantly

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