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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[0017] The cryogenic box that the large-diameter cold-rolled work roll cryogenic treatment method of the present embodiment adopts sees figure 1 , which includes a box body 1 with an insulating layer, an insulated 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 nozzles of the upper two nozzles are inclined downwards, and the nozzles of the lower two nozzles are inclined upwards, and the nozzles of each liquid nitrogen nozzle 3 are provided with a net cover 31 .
[0018] Compared with the original cryogenic box, the internal structure, size and other components of the cryogenic box are basically the same. For example, there is an exhaust hole on the box body 1, a temperature sensor, a liquid nitrogen nozzle 3 It is connected to the liquid nitrogen storage tank through pipelines, and the pipelines are equipped with ultra-low temperature solenoid valves ( figure 1 None of them are sho...
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