CN202254755U - Flange-free hot air container of temperature difference air supplying cupola furnace - Google Patents

Abstract

The utility model belongs to the technical field of smelting equipment and relates to a technology for prolonging the service life and saving the material of a hot air container of a temperature difference air supplying cupola furnace. The flange-free hot air container of temperature difference air supplying cupola furnace consists of an upper inner barrel (1) and a lower inner barrel (2), wherein the two barrel bodies are connected through a cone (3); the upper part of an upper air bellows (7) is welded on the upper inner barrel (1) and the cone (3); a lower air bellows (8) is welded on the cone (3) and the lower inner barrel (2); a cavity A, a cavity B and a cavity C are provided; connecting plates (10) are welded on the upper part of the upper inner barrel (1) and on the lower part of the lower inner barrel (2); and the cone (3) is provided with a passage (11). Cold air enter from an inlet D, hot air with relatively high temperature is exhausted through a port E, and hot air is exhausted by a port F so as to realize temperature difference air supplying, so that the cupola furnace saves energy and can produce high temperature for melting cast iron; and compared with the two temperature difference air supplying cupola furnaces, the cupola furnace has the advantages of long in service life and material conservation.

Description

Can't blue temperature difference air feed one furnace cupola hot blast courage

One, technical field

The present invention belongs to the smelting equipment economizer heat exchanger to improve service life and material-saving technical field.

Two, background technology

Temperature difference air supply cupola furnace for energy-saving high-temperature used two hot blast courages as shown in Figure 3 go up hot blast courages (7) and following hot blast courage (8) in practice the energy-saving high-temperature effect favored by the user.But the life-span instability of hot blast courage is perplexing the user always.As shown in Figure 3 through practice and theory analysis, old-fashioned hot blast courage generally all is that thick flange (1) and (3) directly are welded on inner core (9) and (10), and bellows (2) and (4) directly are welded on flange (1) and (3); When the blow-on melting; Inner barrel (9) and (10) receive the influence of high-temperature gas, produce very big outer tension, and the thick flange (1) of external cooling and (3) produce very big restraining force; Weld cracking gets in the stove wind of bellows in the middle of causing flange and cylindrical shell, and the hot blast courage is scrapped.

Three, utility model content

Having invented for life-span of improving the hot blast courage and economical with materials can't blue temperature difference air feed one furnace cupola hot blast courage.

Can't blue hot blast courage one furnace cupola hot blast courage shown in Fig. 1 front view, it is to be welded with fin (6) by last inner core (1) outside, imports the waste heat in the stove into the air feed air; A part is supplied with the furnace cupola uptake through E; The outer fin (4) that is welded with of following inner core (2), in be welded with fin (5), import the high-temperature furnace gas heat into the air feed air through heat exchange; Produce high temperature air, through the F confession to air port under the furnace cupola.Two inner cores (1) are to be connected by cone (3) with (2).Connect with centrum (3), when inner core (1) and inner core (2) expanded by heating, two cylindrical shells expand simultaneously, and cone also expands, and the restraining force between cone and the cylindrical shell is very little, and inner core is not easy to crack.Last bellows (7) top is welded in cylindrical shell (1) top, and the bottom is welded on the cone (3), and following bellows (8) top is welded on the cone (3), and the bottom is welded on the inner core (2).Bellows are welded in and can effectively prevent on the cylindrical shell to leak in the cylindrical shell cracking up and down, also find easily during the inner core cracking to remedy.Following bellows are provided with A, B, three cavitys of C, and (109 are welded in inner core (1) top and following inner core (2) bottom to fishplate bar.Adopting fishplate bar (10) to cancel original whole flange connects; Former thick whole flange connects, when cylindrical shell (1) and (2) expanded by heating, owing to do not expand outside expanding in the flange; Having retrained the outer of cylindrical shell (1) and (2) expands; Caused inner core to produce distortion and cracking, cancelled the former connection of 4 big flanges, not only saved material but also reduced the radial constraint power of integral (type) flange with cone (3) and fishplate bar (10) replacement.Shown in figure (2) vertical view, have oblong aperture (12) on the fishplate bar (10), thermal expansion shrinkage radial clearance is arranged for the connection screw, also cancelled fishplate bar (10) to inner core (1) and (2) radial constraint power.For this reason, inner core (1) and (2) are free to expand with heat and contract with cold and can not produce distortion and cracking.Prolonged the life-span of hot blast courage effectively.Thin flange (9) is welded in inner core (1) top and following inner core (2) bottom, and thin flange is that the last lower furnace body of sealing prevents that furnace gas from leaking outside, and has avoided the restraining force to inner core through self-deformation.Being in the wind on the cone (3) has passage (11) and makes the part hot blast get into lower air conduit (8) between case (7) and following bellows (8), make hot blast continue heating.Produce high-temperature gas and send into exhaust outlet at the bottom of the furnace cupola from the F mouth

Four, description of drawings

Fig. 3 is a former pair of wind courage temperature difference air feed hot blast courage.It is made up of last hot blast courage (7) and following hot blast courage (8); Connected two hot blast courages by pipeline (11), furnace gas is discharged by lower inlet (5) and upper outlet (6), respectively has inner core (9) and inner core (10) to form; Flange (1) and flange (3) all are welded on cylindrical shell (9) and (10); Bellows (2) and bellows (4) all are welded on flange (1) and the flange (3), owing to expand with heat and contract with cold, at cylindrical shell (9) and flange (10); Cylindrical shell (10) and flange (3) junction are easy to cracking, and the wind that splits back bellows (2) and bellows (4) gets into the interior furnace cupola of stove and can not use.Fig. 1 front view is can't blue temperature difference air feed one furnace cupola hot blast courage, has cancelled 4 big flanges of former wind courage, and the coupling part connects with fishplate bar (10); Hermetic unit realizes that with thin flange (9) bellows (7) directly are welded on inner core (1) and the inner core (2) with bellows (8), and Fig. 2 vertical view (12) is for opening the oblong aperture on fishplate bar (10); (6), (4), (5) are fin, (14) are the furnace gas lower inlet, (13) are upper inlet; (3) be the cone flange, (11) are the opening on the flange, and D is a blower inlet; F and E are hot-blast outlet, and A, B, C are 3 cavitys of following bellows.

Five, the specific embodiment

As shown in Figure 1, there is the cold wind of pressure to heat through fin (6) passage from the D import, a part is discharged from the E mouth and is got into the furnace cupola uptake.Another part hot blast gets into down from mouth (11), and hot bellows obtains high-temperature gas is sent into furnace cupola by the discharge of F mouth following exhaust outlet through A, B, a C3 bellows through the heat transfer of blade (4) and blade (5); Formed the effect of temperature difference air feed, identical with former pair of wind courage temperature difference air feed.

Claims (1)

1. planting can't blue temperature difference air feed one furnace cupola hot blast courage, and it is characterized in that: it is to be welded with fin (6) by last inner core (1) outside, the outer fin (4) that is welded with of following inner core (2); Interior weldering fin (5); Two cylindrical shells are to be connected by cone (3), and last bellows (7) top is welded in inner core (1) top, and the bottom is welded on the cone (3); Following bellows (8) top is welded on the cone (3); The bottom is welded in down on the inner core (2), and bellows are provided with A, B, three cavitys of C, and fishplate bar (10) is welded in inner core (1) top and following inner core (2) bottom; Have oblong aperture (12) on the fishplate bar (10); Thin flange (9) is welded in inner core (1) top and following inner core (2) bottom, and being in the wind on the cone (3) has passage (11) between case (7) and following bellows (8), and the cold air with pressure obtains the higher thermal air from D pipeline entering bellows (7) through the heat exchange of radiator shutter (6) and discharges from the E mouth; Exhaust outlet on the supply furnace cupola, another burst higher thermal air gets into bellows (8) from passage (11) and discharges exhaust outlet realization temperature difference air feed under the hot blast entering furnace cupola through A, B, C three cavitys from the F mouth through the heat transfer of fin (4), (5).

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