Subzero treatment method for large-diameter cold rolling work roller and copious cooling box thereof
A technology for cold-rolled work rolls and cryogenic treatment, which is applied in the field of cryogenic treatment of large-diameter cold-rolled work rolls and cryogenic boxes, and can solve problems such as low work efficiency, slow cooling speed, and low heat exchange efficiency, so as to improve work efficiency, Lower temperature and high thermal conductivity
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[0016] (Example 1)
[0017] The cryogenic box used in the cryogenic treatment method of the large-diameter cold rolling work roll of this embodiment is shown in figure 1 , Which includes a box body 1 with a thermal insulation layer, a thermal insulation box cover 2 and a liquid nitrogen nozzle 3 arranged in the box body 1. There are two liquid nitrogen nozzles 3 up and down respectively, the upper 2 nozzles are inclined downward, the lower 2 nozzles are inclined upward, and the nozzle of each liquid nitrogen nozzle 3 is provided with a mesh cover 31.
[0018] Compared with the original cryogenic box, the internal structure, size and other parts of the cryogenic box are basically the same. For example, the box 1 is also equipped with an exhaust hole, and the box 1 is also equipped with a temperature sensor and a liquid nitrogen nozzle. 3 It is connected to the liquid nitrogen storage tank through a pipeline, and the pipeline is equipped with an ultra-low temperature solenoid valve ...
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