Underdriving progressive withdrawal and straightening machine with heat insulation device

Abstract

The invention provides a progressive underdriving five-roller straightening and withdrawal machine with a heat insulation device. The withdrawal and straightening machine comprises a pair of withdrawal rollers and a pair of straightening rollers which are arranged inside a heat insulation cover, and a lower roller. Three underdriving rollers are arranged on a withdrawal and straightening machine base with a refractory castable material and transmitted by a chain wheel and are connected with a speed reducer with a variable frequency speed-regulating motor outside a production line through a coupler and a universal-joint spindle; and two upper driven rollers are arranged on a lifting guide cover pulled by a hydraulic cylinder and provided with a refractory fiber. A cantilever vertical roller is arranged on the withdrawal and straightening machine base; the diameter of the roller can be changed along with the width of casting blank; all the rollers are communicated with water to be cooled; and a plurality of withdrawal and straightening machines are arranged on an overhead base shared by the withdrawal and straightening machines through a tapered wedge. The progressive underdriving five-roller withdrawal and straightening machine has the advantages of preventing billet steel from heat dissipation and oxidation to the greatest degree, improving operating conditions of electromechanical equipment, moving the electromechanical equipment outside the production line so as to facilitate maintenance and management, preventing air leakage on a joint surface by adopting sand seal, and effectively realizing the sealing and cooling of an axial end by adopting an air knife structure.

Description

technical field [0001] The invention relates to a lower-drive progressive tension-leveler with a heat preservation device, which is used in continuous steel casting and hot billet hot-feeding and hot-charging devices in iron and steel plants. Background technique [0002] Iron and steel enterprises are large energy consumers with great energy saving potential, and they are also large pollutant dischargers, so there is a long way to go to reduce emissions. High quality, energy saving, consumption reduction, and benefit are the goals that enterprises always pursue. Energy saving and emission reduction are twin brothers with two sides. Energy saving is a benefit economic issue, while emission reduction and low carbon will be a political issue at present. Severe natural disasters have been promoted to a major event related to human survival. Hot delivery and hot charging of steel billets in iron and steel plants are very common, and have achieved good energy-saving effects. Ho...

AI Technical Summary

Problems solved by technology

Hot delivery and hot charging of steel billets in iron and steel plants are very common, and have achieved good energy-saving effects. However, at present, hot billets are generally transported and produced in an open manner. The speed of billets in the casting process of continuous casting machines is low, and the hot billets are exposed through this section. For a long time, the billet has just finished solidification in this section, the billet temperature is the highest, the heat dissipation speed is fast, and the heat loss is large, which has a relatively large adverse effect on the surrounding equipment and the environment, accompanied by a large amount of metal oxidation loss, and the furnace temperature is not high enough. If you want to add heat preservation cover to the tension leveling area, due to technical difficulties (the most important one is the tension leveling area, it is difficult to take insulation measures due to the limitation of the flow distance of the continuous casting machine), so it has not been fully realized. deliver

[0003] Billet tensioning and leveling machine is one of the important equipment in continuous steel casting. It depends on whether it can produce normally at high speed and stably. It is in the highest temperature state just after the billet is completely solidified. Since the continuous casting machine is produced by multiple streams, it is affected by multiple streams. High-temperature billet baking affects the life of electromechanical equipment and is also one of the areas where accidents occur frequently. In addition, water cooling is required for the normal operation of electromechanical equipment, which consumes a lot of cooling water and reduces the billet temperature a lot.

[0004] The continuous casting machine was chain-type upper transmission in the early days, but because the billet had just solidified and the temperature of the billet was very high, the chain had been baked at high temperature for a long time, causing many failures and affecting production. The electromechanical equipment is bulky, and it is not easy to arrange it on the production line with small flow spacing. The high temperature baking also affects the normal operation of the electromechanical equipment. The chain drive structure is simple and easy to maintain. Especially in the section of the tension leveler, there are two different distances. Large and small transmissions with the same speed, the speed is very low, and they are operated at constant speed and constant torque. It is just to change the two sets of transmissions into one set of chain transmission. Due to these characteristics, it should be the advantages of chain transmission with simple structure and low investment. where the

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