RU2054148C1 - Device for transportation of articles in walking-beam furnaces with heat recuperation - Google Patents

Abstract

FIELD: transportation devices. SUBSTANCE: device has fixed hearth 1, walking beams 2 with bearing uprights 3 and load-bearing part 4. Walking beams are connected with vertical and horizontal motion mechanism 5. Articles 6 are hearth are longitudinal channels 8 for motion of pushing uprights 9 secured on walking beams. Distance between load-bearing uprights is equal to longitudinal motion pitch H and that between load-bearing uprights and pushing uprights is equal to (H + 0.5B), where B is width of load-bearing part of load-bearing upright. Device makes it possible to simplify construction of furnace through single-sided charging and discharging of articles, to enhance sealing of working space due to blind laying of second end face of furnace, to cut by half lines of transportation of articles from and to furnace and to reduce number of attending personnel. Besides that, invention makes it possible to exclude additional discharge of combustion products from furnace, to enhance efficiency of recovery of heat of combustion products having left one zone of direct recuperation of heat and to enhance degree of direct recuperation. EFFECT: enhanced economical efficiency. 2 dwg

Description

 The invention relates to devices for transporting products, blanks, containers, pallets in furnaces with direct heat recovery, including the stages of heating, aging and cooling, and can be used in furnaces for roasting, drying and heat treatment of refractory, ceramic, building, carbon and other materials and metals in refractory, metallurgical and engineering industries.

 The aim of the invention is to increase the economic performance of the furnace.

 In FIG. 1 and 2 are longitudinal and transverse sections of the furnace with a device for transporting products.

 The device comprises a fixed hearth 1, walking beams 2 with support legs 3 and a supporting part 4. Walking beams are connected to the mechanism 5 of their vertical and horizontal movement. Products 6 are placed on the bottom. In the masonry of the furnace body 7 and the bottom, longitudinal channels 8 are made for moving the pushing posts 9, mounted on walking beams. The arrows indicate the direction of movement of the products.

 The distance between the support posts 3 is equal to the longitudinal pitch N. The distance between the last support posts and the pushing posts 9 is (N + 0.5 V), where B is the width of the supporting part of the support.

 The invention is as follows.

 In the initial position, the bearing parts of the walking beams are below the upper level of the hearth and are located under the blanks, which must be moved in the direction of "in the furnace" (figure 1 to the right). Using the vertical movement mechanism, these products are lifted by walking beams to a predetermined height, then, using the horizontal movement mechanism, the products are transferred to the right by the distance of the longitudinal pitch H and lowered to a stationary one under the furnace. Bearing parts of the racks fall below the upper level of the hearth. In this case, the last product of this row (on the right) occupies an extreme position. Then the beams with uprights are moved half a step H to the left in the horizontal direction, bringing their load-bearing parts under the product, which must be moved in the direction "from the furnace". After that, the beams are moved vertically upward, lifting the product, and then moved horizontally a full step to the left. During this period, when the beams pass half a step, the pushing racks abut against the outermost product and, with a further horizontal course, push it half a step to the left, thus translating into the number of products moved from the furnace. After this, the beams are lowered and moved half a step to the right, returning them again to their original position. The extreme right position on a motionless hearth is free of products. Then the cycle of movements after a certain time interval is repeated.

 In FIG. 1 arrows and dashed lines show a cycle of movements.

 The furnace is loaded by feeding products in a row from one end of the furnace and moving them according to the previously described method. When loading, at first the furnace is filled only with heated products, since there are no cooled ones yet, therefore the products are on the hearth with large gaps. When the products supplied to the furnace reach the extreme position, gaps (gaps) will begin to fill up with products coming from the furnace. When the return zone fills the entire zone of the final preheating, the supply is stopped and the products are heated in it to a predetermined temperature. At this time, the direct recovery zone does not function, since it is filled only with heated products. When the products in the preheating zone have reached the set temperature, they turn on the mechanism for moving the beams and begin to fill the recovery zone with cooled products. When the first products begin to exit the furnace, the entire direct recovery zone will begin to operate and the furnace will enter continuous operation.

 The furnace stops with the complete unloading of the products by stopping the supply of products to the furnace with the working transportation mechanism. When the last loaded product reaches the middle of the preheating zone, the zone is stopped being heated and the products are continued to be discharged from the furnace until they are completely unloaded.

 A temporary stop without unloading products is made by stopping the movement mechanism and reducing the heat load in the heating zone.

 The device allows to simplify the design of the furnace by making one-sided loading and unloading of products, to improve the sealing of the working space due to the blind laying of the second end of the furnace, to halve the product transportation lines to and from the furnace, and to reduce the number of staff. In addition, one-sided loading and unloading of products allows fuel heating to abandon the second exhaust of combustion products from the furnace and, leaving one zone of direct recovery, improve the efficiency of use of heat of combustion products and increase the degree of direct recovery.

Claims (1)

 DEVICE FOR TRANSPORTING PRODUCTS IN FURNACES WITH STEPPING BEAMS AND WITH HEAT RECOVERY, containing a fixed hearth, placed along the side walls and interconnected walking beams with support racks with a width in the bearing part of the beam and the longitudinal distance between the racks, equal to the pitch of the longitudinal distance between the racks, equal to characterized in that, in order to increase the economic performance of the furnace, it is equipped with pushing posts fixed to walking beams, installed relative to the last support posts at a distance Equal to H + 0.5V, and a furnace hearth channels for their displacement.

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