A slab secondary cooling stepless adjustment device

Abstract

The invention relates to a slab secondary cooling stepless regulation device. The slab secondary cooling stepless regulation device comprises motors, speed reducers, electric cylinders, hinge shafts, spraying pipes, nozzles, guiding devices, protection plates, fixed protection covers, telescopic protection covers and the like. The motors serve as transmission drive units to output the rotation movement, the speed reducers transmit the rotation movement and amplify the torque, the electric cylinders receive the rotation movement and convert the rotation movement into the linear movement, and the electric cylinders are connected with the spraying pipes through the hinge shafts. The multiple nozzles are arranged on the spraying pipes. The spraying pipes and the nozzles are driven by the motors, the speed reducers and the electric cylinders to move in the output linear movement direction of the electric cylinders, the guiding devices are arranged on the two sides of the spraying pipes, and the guiding direction of the guiding devices is consistent with the output linear movement direction of the electric cylinders. The device has the beneficial effects of being simple in device structure, superior in sealing protection performance, good in stability, high in reliability and practicability, superior in operability and the like. The problem of local over cooling or over heating due to the width change of slabs is systematically solved, and wide market application prospects are achieved.

Description

technical field [0001] The invention belongs to the technical field of metallurgical continuous casting, and relates to a slab secondary cooling stepless adjustment device. Background technique [0002] In the field of metallurgy, the slab continuous casting machine performs secondary spray cooling on the solid-liquid two-phase casting slab forming the slab shell in the sector area, so that the liquid steel inside the casting slab continues to shrink and solidify to form a solid slab, and the secondary spraying Poor cooling effect will increase the probability of occurrence of various slab quality problems such as shrinkage cavities, shrinkage porosity, and cracks, which will cause existing cracks to spread further in the secondary cooling zone. The structural characteristics and arrangement of the secondary spray cooling are slab An important factor affecting quality performance. [0003] At present, most of the slab continuous casting machines in China adopt static second...

AI Technical Summary

Problems solved by technology

[0004] Japan JSP's secondary cooling spray width adjustment device such as figure 1 As shown, the nozzle, spray pipe, screw and guide device are all arranged in the middle of the sector, and the spray pipe slides on the guide device to adapt to the production of slabs of different widths. Although this device can realize the secondary cold spray in principle However, there are many problems in the specific implementation: 1. The whole device is arranged in the middle position, which is seriously affected by the iron oxide scale and spray water, which seriously affects the life and stability of the equipment; 2. The whole device is not equipped with any protective measures, all Exposure to extremely harsh working conditions; 3. The mechanism design uses multiple screws to transmit torque, with complex structure and many moving pairs, which is very unfavorable for working in harsh environments such as high temperature, water vapor, and iron oxide scale

However, the device still has the following problems: 1. Using hydraulic cylinders or air cylinders as the power source, if the existing continuous casting machine is modified, it is necessary to increase the valve table, the piping on the fan section, the intermediate piping, etc., and the transformation of the hydraulic pipeline After flushing, and even the expansion of the hydraulic station, etc., the reconstruction workload is heavy, the cycle is long, the investment is high, and the economy is poor; 2. The technology only considers the problem of device protection from the center of the casting machine in terms of layout, and is not comprehensive and systematic. Consider comprehensive solutions

For the new continuous casting machine, the application of this technology is not obvious, but for the transformation of the continuous casting machine, there are big problems. At present, the key application object of the secondary cooling of the slab is the vast continuous casting machine transformation market

[0006] To sum up, the existing secondary cooling width adjustment device technology for slab continuous casting machines is still not mature enough, there are many problems in application, equipment stability and reliability are poor, especially in the continuous casting machine transformation market, there are transformation Many problems such as heavy workload, long cycle, high investment and poor economy are not conducive to the promotion and application of technology

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