SU830104A1

SU830104A1 - Furnace roller

Info

Publication number: SU830104A1
Application number: SU792777852A
Authority: SU
Inventors: Владимир Яковлевич Вязовик; Анатолий Степанович Горбик; Вячеслав Леонидович Дзюба; Александр Николаевич Несмачный; Юрий Викентьевич Мних; Борис Григорьевич Шленский
Original assignee: Коммунарский Горно-Металлургическийинститут
Priority date: 1979-03-21
Filing date: 1979-03-21
Publication date: 1981-05-15

Description

(53) ПЕЧНОЙ РОЛИК(53) HOSE ROLLER

1one

Изобретение относитс к черной металлургии , конкретнее к оперным устройствам дл перемещени нагреваемого металла впечах с роликовым подом.The invention relates to ferrous metallurgy, and more specifically to operatic devices for moving a heated metal in furnaces with a roller hearth.

Известен печной охладительный ролик, содержащий полый корпус и концентрично относительно корпуса внутреннюю трубу с отверсти ми, через которые в зазор между трубой и корпусом поступает охлаждающа среда 1.A furnace cooling roller is known, comprising a hollow body and an inner tube concentrically with respect to the body with openings through which cooling medium 1 enters the gap between the pipe and the body.

Недостатками известного ролика вл ютс низка стойкость, высокие удельные расходы топлива на нагрев и некачественный нагрев металла. Низка стойкость обуславливаетс значительными перепадами температуры в стенке бочки. Холодные поверхности роликов вызывают более медленный нагрев нижней поверхности металла, вследствие чего создаетс температурный перепад в сечении металла. Тепло, уносимое с охлаждающей средой, как правило, не используетс , что увеличивает расход топлива на нагрев металла.The disadvantages of the known roller are low durability, high specific fuel consumption for heating and low-quality heating of the metal. Low durability is caused by significant temperature variations in the barrel wall. The cold surfaces of the rollers cause slower heating of the bottom surface of the metal, resulting in a temperature difference in the cross section of the metal. Heat carried away with the cooling medium is generally not used, which increases the fuel consumption for heating the metal.

Наиболее близким по технической сущности и достигаемым результатам вл етс печной ролик, содержащий корпус с шейками , заполненный частично жидким теплоносителем , холодильник, установленный на одной из шеек, привод 2.The closest in technical essence and achievable results is a furnace roller, comprising a housing with necks, partially filled with heat-transfer fluid, a cooler mounted on one of the necks, and an actuator 2.

Известный печной ролик из-за недостаточной теплопередающей способности не обеспечивает равномерного отвода тепла при резком увеличении тепловой нагрузки на ролик, что приводит к локальному распределению температур по длине и сечению ролика. Холодильные участки ролика вызывают более медленный нагрев нижней поверхности нагреваемой заготовки, врем нагрева металла увеличиваетс , снижа при этом производительность печи.Known kiln roller due to insufficient heat transfer capacity does not provide uniform heat removal with a sharp increase in heat load on the roller, which leads to a local temperature distribution along the length and cross section of the roller. The cooling sections of the roller cause the heating of the bottom surface of the heated billet to be heated more slowly, and the heating time of the metal increases, thus decreasing the productivity of the furnace.

Цель изобретени - повышение стойкости ролика и КПД печи.The purpose of the invention is to increase the durability of the roller and the efficiency of the furnace.

Поставленна цель достигаетс тем, что ролик снабжен желобами, закрепленными одной стенкой равномерно по образующей к внутренней поверхности корпуса, и мембраной с отверсти ми в щейке корпуса.This goal is achieved by the fact that the roller is provided with grooves fixed by one wall evenly along the forming surface of the inner surface of the body and with a membrane with holes in the body opening.

На фиг. 1 изображен печной ролик, продольный разрез; на фиг. 2 - разрез А-А на фиг. 1; на фиг. 3 - разрез Б-Б на фиг. 1.FIG. 1 shows a furnace roller, longitudinal section; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one.

Claims

The oven roller includes a housing 1 with necks 2 and 3, partially filled with heat-transfer fluid 4, a cooler 5 mounted on one neck 2, an actuator 6 connected to the neck 3, and thrust bearings 7 on necks 2 and 3. On the inner surface of the housing 1 along the generatrix uniformly fixed by one side of the chute 8, forming with the inner surface of the housing w, spruce channels 9 along its entire length. In the neck 3 there is a 1-0 membrane with holes 11, made along the contour. At the end of the housing 1, there is a safety valve 12. In order to ensure the reversible operation of the roller, the slotted channels 9 of the grooves 8 are arranged in accordance with the direction of rotation of the roller. When the roller is rotated, the coolant 4 is entrained by the walls of the housing 1 and captured by the grooves 8, as a result of which a continuous film of liquid forms on the inner surface of the housing. The heat flow from the space of the furnace enters the body 1, causing the liquid wetting the internal surface of the body to evaporate. The resulting condensate returns to the lower part of the internal cavity of the housing. The air present in the cavity of the housing is displaced by forming vapors into the cavity of the neck 3 through the openings 11 of the membrane 10. The membrane 10 restricts the return of air to the cavity of the housing 1, while ensuring an improvement in heat transfer at the heat sink site. Condensate formed in the cavity of the neck 3 freely returns through the opening AND of the membrane 10 into the cavity of the housing 1. The safety valve 12 ensures the removal of steam from the housing 1 when the pressure in it rises above the operating value. During the operation of the roller, the liquid is taken in half of the channels 8 according to the direction of movement. The second half of the gutters at the same time holds the liquid, contributing to the improvement of heat removal from the inner surface of the roller. When rotated in the opposite direction, the liquid is taken in by the second half of the grooves 8, and the first half retains the liquid, helping to improve the heat sink. The design of the kiln roller makes it possible to significantly increase its durability, to increase the temperature of the outer surface of the housing, which is a consequence of an increase in the heat resistance of the housing wall and a higher pressure in the inner volume of the roller. All this will provide a higher furnace performance and, accordingly, will improve the quality of the heated metal. Formula of the invention A furnace roller comprising a body with necks partially filled with a coolant, a cooler mounted on one of the necks, characterized in that in order to increase the durability of the roller and increase efficiency, it is provided with grooves evenly fixed along the one side forming the inner surface of the body and a membrane with holes in the neck of the body. Sources of information taken into account in the examination 1.Patent of Germany No. 1403274, cl. 18s, 9/00, 1970.

2. USSR author's certificate number 654845, cl. F 27 D 3/02, 1977.