SU1070410A1 - Furnace bottom - Google Patents

Abstract

UNDER OVENS, containing stationary and movable beams, sectional casing, including slips rigidly mounted on movable beams, and side hydraulic locks, characterized in that, in order to expand the technological possibilities of the hearth and improve the quality of heating, the middle section of the casing is rigidly fixed on movable beams and They are made with windows for accommodating stationary beams, and the stationary beams have washers overlapping the windows of the middle section of the casing. 1 (L O 4

Description

The invention relates to ferrous metal, in particular, to the design of furnaces d, 1 for heating metal. Known nodes of kilns with walking beams are known, whose shells are sheet fencing, more complex devices with sliders, glands, etc., and hydraulic gates 1. The disadvantage of these structures is that during the movement of walking beams with with blanks, the under-floor space bounded by the casing and the plane of laying the blanks changes its volume. And since the movement of the beams causes a change in the sub-floor volume, it acts as a pump, causing unwanted gas flows vertically due to the occurrence of vacuum and pressure areas. The closest to the proposed technical essence and the achieved result is under the furnace with movable beams, the sectional casing of which contains lateral hydraulic locks, knives, chutes for descaling and rigidly fixed on movable beams. A disadvantage of the known construction is that each beam of the rolling furnace hearth has on both sides longitudinal boxes filled with water, which have a cooling effect on the heated metal, impairing its further rolling. In addition, in this case, the structural elements of the mobile hearth are operated in an atmosphere of water vapor, evaporating from the open surfaces of hydraulic locks, which is associated with additional costs for taking special measures against corrosion. The purpose of the invention is to expand the technological capabilities of the hearth and to increase the heating quality. The goal is achieved by the fact that at the hearth of the furnace, containing stationary and movable beams, a sectional casing, including sliding plates rigidly fixed on movable beams, and side hydraulic locks, the middle section of the casing is rigidly fixed on movable beams and made with windows for accommodating stationary beams, and stationary beams have washers overlapping the windows of the middle section of the casing. FIG. 1 is a general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows the node I in FIG. one; in fig. 4 — node II in FIG. one; in fig. 5 shows the node III in FIG. 1. Under the furnace with movable beams consists of stationary 1 and 2 beams securing. Each beam 1 and 2 constructively contains a trough 3 of heat-resistant steel lined with refractory mass or brick 4. The trough 3 is supported on the welded bale 5, through the bars 6 and 7 the welded beam 5 of the walking beam 2 rests on the frame 8, and the fixed beam 1 - to a stationary support 9. An inclined sheet 10 is provided for removing scale on the securing beams 2, the upper part 11 of which is made water-cooled in order to avoid sticking of scale. Bins 12 with gates 13 and receiving hoppers 14 are used for taking scale. In addition, chapters 15 are provided. To seal the furnace along the outer perimeter of the beams 2, a water slide 16 with knives 17 is provided. The furnace is sealed in the middle part with sheet 18 with an oval hole 19, welded to the welded beams 5, and special washers 20. The device operates as follows. The dross, which wakes up in the gaps between the stationary 1 and walking 2 beams, falls on the inclined sheet 10 mounted on the securing beams 2, in order to avoid scale sticking to the inclined sheet 10, the upper part 11 of it, which directly receives the dross from the furnace, is made water-cooled. A large (more than 45 °) angle of inclination of this sheet 10 and shaking while raising and lowering the beam facilitate the rapid movement of the scale into the bunker 12, from which periodically the scale is removed To the receiving funnels 14 (after opening the gates 13). For possible observation of the accumulation of scale on the inclined sheets 10, chapters 15 are provided. The considerable size of chases 15 (up to 100 mm in diameter) makes it possible, if necessary, to use them for cleaning the scale. The sealing of the middle part of the furnace (in the area of the central stationary beam 1) is carried out using a special washer 20 mounted on a round (pipe) column 7 of the stationary beam 1, and a sheet 18 rigidly attached to the walking beams 2 with an oval hole 19 in it. The main advantage of the invention is the expansion of the furnace capacity with movable beams on the assortment of heated products due to the fact that it is possible to reduce the width of the beams and the distance between the beams, in addition, the number of hydraulic locks is reduced, the scale is collected, and the working conditions are improved. In addition, the proposed hearth design differs from the known ones in that the casing is an integral part of the walking beams and moves up and down along with the beams, which eliminates the effect of underpressure. The expected economic effect from the use of the invention will be on average 1 ruble / ton of products due to the improved quality of heating and a decrease in steel waste from oxidation during heating.

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Claims (1)

UNDER THE FURNACE, containing stationary and movable beams, a sectional casing, including slides rigidly fixed on the movable beams, and side water locks, characterized in that, in order to expand the technological capabilities of the hearth and improve the quality of heating, the middle section of the casing is rigidly mounted on the movable beams and made with windows for placement of stationary beams in them, and stationary beams have washers that overlap the windows of the middle section of the casing.