SU1235945A1 - Stand for bell-type furnace - Google Patents

Description

 one

The invention relates to ferrous and non-ferrous metallurgy, in particular to the heat treatment of densely wound rolls of cold rolled sheet and strip of steel of different grades, non-ferrous metals and alloys, for example rolls of tin.

The aim of the invention is to increase the productivity and quality of annealing by increasing the intensity and uniformity of heat flow circulation.

On the scheme of the stand of the bell-type furnace for annealing the rolls of sheet metal; FIG. 2 shows a convector ring with radially supported supports, installed under the rolls foot, a cross section; figure 3 is the same, view in plan.

The device of the stand of the bell-type furnace for the annealing of the foot of thin-sheet metal rolls contains a convector ring 1 with radially arranged supports 2 and interfitting bridges 3 installed below, the bottom roll of metal stopgl 4 on the lid of the guide apparatus 5 of the circulatory fan 6, and the outboard protective refrigerators gas 7,

The convector ring 1 consists of two round washer-shaped plates 8, coaxially interconnected parabolically bent by partitions 9, forming a spiral; 11 spiral paths 10 tapering to the center for passage of the circulating heat carrier gas. To the bottom plate of the convector ring are attached radially arranged supports 2, made in the form of a strip of hollow sectors II open along the steam-side and closed along the inner diameter. The arrangement of the supports is consistent with the placement of the nozzles 12 in the guide apparatus for the passage of protective gas from the removed refrigerators 13, i.e. supports should be installed in the sectors between the specified nozzles

The cavities between the supports are hermetically sealed by interfacing bridges 3 around the circumference 14, which covers the central part of the guide vane.

Protective heat-transfer fluid constantly circulating under muffle 15 through 359452

cut the channels of the convector ring 1 in the direction shown by the dark arrows.

In the period of heating the coils, the protective gas is circulated through the refrigerators and shut off by a shut-off valve 16. The circular gas, through the channels of the convector ring, transfers the protective gas by convection from the muffle to the end

 O roll. Additionally, heat radiates from the muffle into the bearing cavities and inter-cavity cavities and is then transmitted by radiation and convection. to the end of the lower roll of the foot. With

At the same time, an additional heating of the protective gas circulating through the ring occurs at the same time, which compensates for its temperature in the process of convective heat transfer to

20 the end of the roll and aligns the heat flux on the surface of the end.

During the cooling period of the annealing metal, the shut-off valve is opened and part of the protective gas begins to circulate in direction, shown by light arrows through the coolers. Coolant; kdennyi {in refrigerators gas - passes through the pipes in the cavity between the supports and then through the entrained cavity of the coil into the annapciT guide, where it mixes with the main part of the gas circulating through the convector rings, lowers its temperature and thereby accelerates the constant cooling both lower, and all other rolls., annealed in a bell furnace. The resistance to gas circulation through refrigerators in the stand is unimportant and therefore its

40, the intensity and, accordingly, the effectiveness of the soup soup coolers carried out, gradually increase.

The additional swelling of the speed 45 and the uniformity of the oxidation of the bottom of the roll is provided by heat transfer to the muffle from the support cavities and inter-core cavities.

In the case of annealing of small cages 50 rolls, it is also possible to constructively simplify the proposed gasket by making the supports in the form of solid ribs, and the interfacing one in the form of a solid cylindrical ring.

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FIG. one

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Editor P.Kossey

Compiled by O. Aiterman:

Tehred V. Kadar: Projector B. Sinitska

Order 3063/25 Circulation 552Subscription

VNIIPI USSR State Committee

for inventions and discoveries P3035, Moscow. Zh-35, Raut ska nab. 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (2)

1. STAND OF A CAPPER FURNACE for annealing a stack of sheets of sheet metal, comprising a built-in circulation fan with a guiding apparatus, external refrigerators with shielding gas supply pipes, a cover of the guiding apparatus with holes for shielding gas passage and a convector ring mounted on it made in the form of washer-shaped plates , coaxially interconnected by parabolic 'curved partitions, forming spiral channels narrowing towards the center, characterized in that, in order to increase the productivity In addition to increasing the quality and annealing quality by increasing the intensity and uniformity of the heat flow circulation, it is equipped with radial bearings fixed on the bottom plate of the convector ring, <S made in the form of hollow sectors open along the outer and inner diameters of the ring, and inter-jumper , hermetically overlapping the cavity between the radial bearings in a circle covering the shielding gas supply pipes. 2. Stand pop. 1, characterized in that the radial bearings are made in the form of ribs, and the inter-bearing jumpers - in the form of solid plates. ns