DE2117871B2 - Impact armor for a shaft furnace - Google Patents

Description

50

The invention relates to an impact armor for a closed by a bell and with A shaft furnace provided with a gas collecting line with a plurality of deflectors, which are circular in the furnace are arranged and each consist of a deflector plate attached to one end of a lever arm, the furnace shell having a plurality of outwardly protruding housing-like beneath the furnace Has projections through which seals each have a pivot shaft with outside of the Oven lying ends and the other ends of the lever arms attached to the pivot shafts are, the pivot shafts by a drive system arranged outside the furnace are rotatable to move the deflectors.

In an impact armor of this type according to German patent specification 864 8SO, the pivot shafts for the deflector approximately at the level of the upper end of the bell in the wall of an upwardly conical housed tapered part of the furnace shell. The deflectors are oriented essentially vertically and can be swiveled outwards against the furnace wall so that they catch the falling load get into the edge area of the shaft furnace. Since the deflectors are essentially in Direction of the path of the load aligned <=: nd, is the one possible by pivoting Change in repellant effect comparatively small. The arrangement of the pivot shafts with a conical Part of the jacket results in tight spaces for repair work. This is especially true for an exchange of the deflector plates while the shaft furnace is in operation.

The Belgian patent 710 061 describes a ring-shaped impact armor, which with the help of Angle levers can be raised and lowered. Here is a pivoting of the deflector plates completely waived. Finally, British patent specification 1,177,333 describes one of ring segments existing impact armor, where with the help of angle levers the ring diameter is enlarged or can be reduced in size. The ring segments essentially always remain in a vertical orientation.

The Belgian patent specification 672 912 describes an impact armor whose deflector plates are articulated are suspended and operated with the help of push rods. Here, too, is insufficient Dimensions, a change in the repellent effect is possible. In addition, these deflector plates must be expanded only possible with great difficulty because each deflector plate inside the shaft furnace is attached to two Places is hinged.

The object of the invention is such a design of impact armor of the type mentioned that the deflector plates can be adjusted over a wide range of the path of the falling load can and are still easily accessible from the outside.

This object is achieved according to the invention in that the pivot shafts are at the same height as the lower end of the bell in its lowered position under the gas manifold through the projections lead, and the deflection plates by changing their angle of inclination against the shaft furnace axis movable along the path formed by the load falling from the bell are.

In that the pivot shafts are provided approximately at the same height as the lower end of the bell, the deflector plates can be moved about on the path of the falling load, so that the greatest change in the repellent effect is achieved in relation to the adjustment path. At the bottom the bell and thus at the same time below the gas collecting line, the furnace jacket is essentially cylindrical, so that the bearing of the pivot shafts is easily accessible. As a result, you can get the Replace the swivel shafts with the deflector plates from the outside without blowing out the shaft furnace must become. This is important because the deflector plates are during the life of a shaft furnace have to be replaced several times.

In order to simplify the maintenance work and the exchange, the projections are according to the invention provided with removable box-shaped lids.

The arrangement of the pivot shafts in projections

on the furnace shell reduces corrosion through Exhaust gases and the thermal stress on the swivel shafts. .

The invention is explained in preferred exemplary embodiments with reference to the drawings that show 13
well -

of the

bell 3
^

^ ₁ a section through the upper part of a shaft furnace which is provided with a hmrichtuns according to the invention,.

T ₂ -section along the urn IV-IV m "

111 3 in enlarged section a deflector, F i 1 4 a partially broken away side view ^^ furnace 1

^ Height arranged, which the ab «^ kter position 4 with its lower ^ gese. ^ _Erfindu f _lg sgemäße Vorrichf ^ 31 together with the

very- l ^

111

tL front view another example of an operating system,

6 a schematic representation of ring

segments and _au . .

F i g. 7 shows a section through an anoere deflector device according to the invention. .

In the case of a device according to FIGS. 1 to 3, a top end of the shaft furnace 1 is fitted with a topping bowl 2, the lower opening of which can be closed by a bell 3 which hangs on a rod 5. The bell3 is moved vertically by a drive mechanism (not shown) on the furnace. The load M is held between the top bowl 2 and the bell 3. When the bell 3 is lowered into the position 4 shown in dashed lines, does the good M fall on a path? The annular gap 6 between the top plate 2 and the bell "The falling material M hits the deflector plates 32, thereby changing its direction of fall and piles up in the furnace. By changing the angle of each deflector plate 32, the material can be distributed in the furnace be from the surface S of the charging material ascending stack gases ibgefühf through the gas manifold 8 ,, the slats on the upper part of the Ofenmanteh Toggle ^SCl Dre ^ß From _W ice _P 32 are each attached via brackets to a lever arm 33rd the Abweisplatten 32 are by The deflector plates 32 can also consist of one piece with the lever arm 33 or be welded or detachably attached to it in order to facilitate their replacement Deflector 31 designated.,

Approximately below the gas collecting line 8, the furnace jacket 7 is provided on the outside with short projections 12, each enclosing an opening 13. Box-like cover 14 with a rectangular, triangular or otherwise shaped cross-section are detachably attached to the projections 12 with the help of clamping bolts 15, so that they f Close openings 13. The side walls 16 of the cover 14 are equipped with bearings 18, which in turn have shaft seals 17 with packs of asbestos or the like. A pivot shaft 35 receives the free end of the lever arm 33 of each Abweis * 31. The Schwcnkwellen 35 are rotatable m the bearings 18 and extend horizontally through the Se.tenwat.de 16 The pivot shafts 35 can instead of the cover 14 on the projections 12 be rotatably held. It is important to accommodate the pivot shafts 35 deep in the covers 14 or in the protrusions, the Abweisülatten 32 in we- ^ Weges / move a _U f dernjas

and the AbweisplaUen 32 ^ relatively small and

are define a ^s ^ n _überIappe no gap, _besd g _ckun gs _g ut M

"Drunger" lead: sem _execution s-

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th 32, ^^ ^s

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himself so that

through which the '^^

down through ^^ ^on ^ ^e _{uibt the} furnace 1 and

* ^ J Z the deflectors 31 of _nkelabstand

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^ be brought. The ^ hydraulic cylinders

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* 5 wear that

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120 ° on the stage, 19

rem foot '1 ^^
Tenon connection

Ends of the basket

Less than 42 are J ^ ^e "s ^m " J "υ
44 connected ^^ de r ^ en «« «Ι ^ Ρ Lifting cylinder 42 actuated

Ring 44 vertical. Top of the ring

Lag ^e rbocke "smdaut α ₃ 1 _{of Abwciser} be ^^^^ gl 47 is _bock by an _L ^e 45 schwenkg ^ _{d £} _ _{r Verbin}

44 ^

f, j _S igt. YY
Bolts 46 each

JJ ^ _{so that they are} not widened by the BoI-zen ^ -rdenjcörmei. A lifting

«™« ^^ X swivel shaft 35 of the from ¹⁶ . ^ieicl ™ "^ _The other end of the lever arm ^^ l ^ efestuät. Ds ana ^^ ^^

49 is. Through a ^ t ι _{en connection-}

with the upper bmie

the,
55 and [
By
good M
so

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the river Oder
the. D «

rod «jrtato _{drive system} 41 working

The deflectors 31 and _{42 pounds wcr} .

/ If * e ^ y ^ _{above the} "" th.

, ^^ _BeweeunK causes the HeVwI- This vertical movement, _{n the He} _

arms 33 _by d * Vert "J ^^ _{gcdurned who}

_{change the} position of the deflector _plates .

_ki f _nn ^fc _the loading _g ^ ^ required _

_{will be} .

_{41 can the} hydraulic

_by pneumatic lifting cylinder ou, _{erset7t we} , _

Bel ^ g fe ^ ^^ ^ _drd the H _y ^^ ^^ ^ ₀

^ ^ _direct to all lever arms 49

Antnehsorgane J ₄₉ " _{via cogwheels closed}

"5 quick, oacr aie new

_Schw enkweJlen 35, as in

? ™ JTII J ^ Sn by Elektromoto-F ι g. 5 shown, also unmmciodr

Ren 51 or reduction gear 52 are driven. Furthermore, instead of the above-mentioned single ring 44 surrounding the furnace, any number of ring segments can be used to actuate the same number of deflector groups. Fig. 6 shows three ring segments 44 a, 44 b and 44 c surrounding the furnace, which are moved vertically by lifting cylinders 42 a, 42 b and 42 c, respectively.

This design has the advantage that the deflectors can be divided into groups and different ones as required Angles set, but also all can be tilted at the same angle.

Furthermore, according to FIG. 7 each deflector plate 32 is suspended in a connection 53 of the lever arm 33 so that it is rotatable relative to the lever arm 33 and regardless of the angle of inclination of the lever arm 33 can be held vertically. The angle of each deflector plate 32 so attached can also be achieved by inserting a wedge f> 4 between Plate 32 and lever arm 33 can be adjusted. It is also possible to have an elastic body between ίο the deflector plate 32 and the lever arm 33 to be arranged to the impact of the charge material mitigate.

1 sheet of drawings

- ^: | VjI

Claims (4)

Patent claims: 1. Impact armor for a shaft furnace closed by a bell and provided with a gas collecting line with a plurality of Abweisem, which are arranged in a circle in the furnace and each consist of a deflector plate attached to one end of a lever arm, the furnace jacket below the top floor a plurality of after has externally protruding housing-like projections through which a pivot shaft with ends located outside the furnace leads via seals and the other ends of the lever arms are fastened to the pivot shafts, the pivot shafts being rotatable by a drive system arranged outside the furnace for moving the deflectors, characterized in that the pivot shafts (35) lead at the same height as the lower end of the bell (3) in its lowered position (4) under the gas manifold (8) through the projections (12), and the deflector plates (32) under change their angle of inclination against the shaft furnace axis along the through from the bell (3) falling charge material formed path (I) are movable. 2. impact armor according to claim 1, characterized in that the projections (12) with removable box-shaped lids (14) are provided. 3. impact armor according to claim 1 and 2, characterized in that for driving the Swivel shafts lifting cylinders (42) are provided. 4. Impact armor according to one of claims 1 to 3, characterized in that the deflectors (31) are divided into a number of groups and the ring (44) accordingly in ring segments (44 λ, 44 b, 44 c), the deflectors (31) are coupled to the Rirgsegmentcn in such a way that the angle of inclination of the deflectors (31) of one group can be set independently of that of the other groups.