Turbulent eddy tubulature type double-water-supply efficient water-cooling nozzle

Abstract

The invention provides a turbulent eddy tubulature type double-water-supply efficient water-cooling nozzle, and relates to the field of metallurgic steel rolling. The turbulent eddy tubulature type double-water-supply efficient water-cooling nozzle comprises a first body and a second body, the left end of the second body is connected with the first body into a whole, the right end of the second body is connected with a pressure discharging half-tube, a swirl nozzle is installed at the left end of the first body, a turbulent half-tube A and a turbulent half-tube B are sequentially installed on the inner side of the right end of the first body, and a first water inlet is formed in the lower side of the first body and leads to the swirl nozzle; a pressure discharging swirl nozzle is installed at the left end of the second body, a turbulent half-tube A and a turbulent half-tube B are sequentially installed on the inner side of the right end of the second body, and a second water inlet is formed in the lower side of the second body and leads to the pressure discharging swirl nozzle. According to the turbulent eddy tubulature type double-water-supply efficient water-cooling nozzle, nozzles with spiral channels and turbulent tubes are adopted to make cooling water form an eddy state to break through a hot-gas membrane, the phenomenon of uneven cooling or temperature departure is overcome, the heat exchange capacity in unit time is improved, and the external quality and the internal mechanical property of products are improved.

Description

technical field [0001] The invention relates to the field of metallurgy and steel rolling, in particular to a vortex turbulent flow tube-row double-supply high-efficiency water-cooling nozzle. Background technique [0002] The water-through cooling process is an important process equipment for high-speed wire rolling on-line heat treatment to ensure product surface quality and internal physical properties. The nozzle is an indispensable and important element in this important process equipment. At present, the nozzles in the water-piercing cooling equipment used on high-speed wire rolling production lines at home and abroad still stay on the traditional structure. Such as figure 1 , figure 2 Shown: (former American Morgan technology), in the figure: 1: body, 2: screw plug, 3: end cover, 4: bolt. [0003] Working principle: The rolled piece enters the nozzle from the bell mouth of the end cover 3 and moves linearly along the inner cavity of the pass (65-95M per second), ...

AI Technical Summary

Problems solved by technology

[0005] 1. During the cooling process, a hot gas diaphragm is formed between the rolled piece and the cooling water due to the action of hot steam. The generation of the gas film makes the cooling water unable to fully cool the rolled piece, resulting in poor cooling effect on the rolled piece per unit time , which reduces the proper heat exchange capacity, such as image 3 as shown, image 3 Middle: A: Rolled piece, B: Hot steam zone, C: Cooling zone

[0006] 2. Since the movement of the rolled piece after entering the nozzle is along the bottom of the guide hole (the weight of the rolled piece itself), objectively, the cooling water cannot effectively cool the rolled piece evenly, such as Figure 4 as shown, Figure 4 Middle: A: rolled piece, B: cooling zone

[0007] Figure 4 As shown, the volume of the cooling medium in the upper part of the rolled piece gradually decreases towards the lower part of the rolled piece. Under the condition of constant unified pressure, the volume and flow rate of the upper and lower cooling water are inconsistent in unit time, resulting in inconsistent degrees of heat exchange between the upper and lower parts, and the rolled piece cannot Uniform cooling (temperature deviation) is obtained, which leads to uneven particle size of the product material, and the mechanical properties of the product after phase change are not uniform, which affects the internal quality of the product

Due to the inconsistent degree of heat exchange between the upper and lower parts of the product (temperature deviation), it will inevitably lead to different surface colors of the product and produce yin and yang surfaces, which will affect the surface quality of the product

[0008] 3. Due to the hot steam generated during the heat exchange, the pressure in the guide hole increases, thereby increasing the movement resistance of the rolled piece and the resistance to the entry of cooling water, which is likely to cause steel stacking accidents and less cooling water flow. Reduced heat exchange capacity

[0009] 4. The nozzle of the traditional structure is an integral structure (such as figure 1 As shown), when the guide hole is worn out and cannot be reused, it will be scrapped as a whole, with short service life and high production cost

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