A cooling spray box with continuous, uniform and high-density arrangement of nozzles

Abstract

The invention provides a cooling spray box with spray nozzles capable of being arranged continuously, uniformly and highly densely. The cooling spray box comprises a cooling spray box body, each water feeding end of the cooling spray box body is a water feeding pipe provided with a water feeding valve and a water feeding flange, the lower portions of the water feeding ends communicate with water storage transverse pipes, the water storage transverse pipes send water entering from the water feeding ends to water spray ends, and finally the water is sprayed out through drainage pipes and the spray nozzles of the water spray ends. The spray nozzles form 2-4 rows of spray nozzle sets, the spray nozzle sets are uniformly arranged on the lower end face of the cooling spray box body in an array manner in the radial direction of the cooling spray box body, an inclined middle partition plate is arranged between every two adjacent spray nozzle sets, the middle partition plates partition the interior of the cooling spray box body into a middle cavity and cavities on the two sides, and the two sides of each inclined middle partition plate are provided with the drainage pipes correspondingly. By means of the cooling spray box, the interference phenomenon of the middle partition plates is eliminated, the cooling capacity of the cooling spray box is improved, a film boiling area with poor heat transfer efficiency can be reduced, improvement of the cooling capacity is achieved, and product performance is improved as a whole.

Description

technical field [0001] The invention relates to the technical field of cooling hot metal plates in iron and steel production, in particular to a cooling spray box in which nozzles can be arranged in a continuous, uniform and high-density manner. Background technique [0002] At present, in the production process of various iron and steel manufacturers, there is a step of rapid cooling of hot metal plates, and this rapid cooling step requires the rapid cooling spray box to have a large cooling rate and high-density cooling capacity in terms of technology. details as follows: [0003] 1. It can realize the separate control of the cooling jets in the middle and both sides in the width direction of the plate, that is, it is required to separate the inside of the cooling spray box to form three relatively isolated and mutually sealed cavities in the middle cavity and the cavities on both sides. The cavities are filled with water respectively; [0004] 2. It can produce high-den...

AI Technical Summary

Problems solved by technology

Therefore, after the middle partition is set, there will inevitably be a certain interval width between the middle nozzle and the side nozzles, and it is impossible to realize the full continuous arrangement of the nozzles, which will cause the hot metal plate that needs to be cooled to be in this position during use. There is a high-temperature zone with a higher temperature than its two sides on the interval line formed by the middle partition (blocked by the middle partition and unable to spray), which greatly affects the performance of the cooled metal plate

[0010] In order to solve the above problems, although the rapid cooling spray box in the prior art has also adopted some measures, such as arranging nozzles with full continuous equal intervals or full continuous gradient intervals or making the middle partition as thin as possible, after field implementation, it was found that , these changes are palliative but not the root cause, and have brought new problems:

[0011] 1. If the nozzles are arranged with fully continuous equal intervals or fully continuous gradient intervals, it will inevitably cause the drainage pipes on both sides of the middle partition to interfere with the middle partition, and there is not enough operating space for the spray box of this design. Fix the middle partition and the drainage tubes on both sides;

[0012] 2. If the intermediate partition is too thin, it will directly affect the compressive strength, reduce the overall strength of the rapid cooling spray box, and also cause the sealing strip between the intermediate partition and the sealing surface of the box to be too narrow, which is easy to seal in the middle cavity Internal leakage between the body and the cavities on both sides

[0013] In addition, due to the interference of the intermediate partition, currently only two rows of nozzle spray boxes can be processed; if the nozzles are arranged in three, four or more rows, it will be impossible to set the intermediate partition at all, and it will not be possible Realize the separate control of the water flow in the middle chamber and the chambers on both sides

Greatly limits the cooling capacity of the cooling spray box

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