A cooling device capable of forming high-density oblique jet flow

Abstract

A cooling device capable of forming a high-density oblique jet flow, which includes a body with a rectangular box structure, including a box with upper and lower openings, an upper cover plate, and a lower bottom plate; the lower opening end of the box is a slope; the upper The cover plate is provided with a number of through holes along the length direction, and the lower base plate is provided with a number of installation through holes along the length direction; the water inlet pipe includes a straight pipe arranged horizontally, a number of vertical pipes arranged on the upper part of the straight pipe along the length direction of the straight pipe, and holes at the end of the vertical pipe. Connecting flange; both ends of the straight pipe are closed, and the lower part of the straight pipe is provided with water outlet holes along the length direction; the vertical pipe is inserted into the through hole of the upper cover; ; A number of arc-shaped drainage tubes are arranged in the box body, the lower ports are respectively connected to the nozzles, and the upper ports are located in the upper part of the box body. The invention has a reasonable structure and can quickly spray water and quickly cut off water in a very short time; its water storage structure can fully protect the device itself and its sealing parts from heat radiation, and prolong the service life.

Description

technical field [0001] The invention belongs to the field of cooling treatment of metal plates and strips, and in particular relates to a cooling device capable of forming high-density oblique jet flow, which is used to realize rapid cooling of hot-rolled materials. Background technique [0002] At present, there are mainly the following types of devices for cooling metal plates and strips: one is a laminar flow cooling device, which uses a cooling water flow with a certain pressure to vertically impact the surface of the steel plate through dense nozzles to achieve cooling; The other is a cooling device that can form a flat jet (slit jet). Due to the low cooling capacity of the laminar flow cooling device, it can no longer meet the higher and higher cooling process requirements; although the device that can form a flat jet flow has a large amount of water and a strong cooling capacity, it requires great processing of the gap surface and requires gap adjustment. higher. ...

AI Technical Summary

Problems solved by technology

[0006] ①Slow opening of the water flow—according to the running position of the rolled piece, when the PLC controls the start of the spray water flow, the cooling water needs to fill the entire cavity before it can start spraying water on the roller table. There is a certain hysteresis, and the system does not respond well when opening;

[0007] ②Slow shut-off water flow—according to the running position of the rolled piece, when the PLC controls to close the spray water flow, although the front valve can be closed immediately, the remaining cooling water in the entire cavity (upper cooling header) will continue to slowly flow from the narrow cavity due to its own weight. It drips from the crack until it completely empties, so it is impossible to achieve instant water cutoff, and the system responds very poorly to shut down

[0008] ③ Poor heat resistance - because the entire cooling device is very close to the surface of the roller table, when no water is sprayed according to the process requirements, since there is no water storage in the cavity, the entire device will suffer from heat radiation from the rolled piece (hot steel plate). The temperature rise will be relatively large, the seals in the device are easily damaged, and the device itself is also prone to deformation and accelerated deterioration due to long-term heating

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