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Патент USA US2115690

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Patenred Apr.^26,_193s
2,115,690v
PATENT OFFICE
I .UNITED s'rATEs
24154590
Borneo Fort nAILs
Christer Peter Sandberg, Oscar Fridolf Alex
ander Sandberg, and Nils Percy Patrick Sand
berg, London, England, assignors to the ?rm
of Messrs. Sandberg, London, England
Application October 10, 1931, Serial No. 568,140
In Great Britain June 26, 1931
(Cl. 80-42)
. 9 Claims.
In order to permit of travel of the rails in _
This invention relates to a novel apparatus for
controlling the Cooling of rails or the like as they
leave the rolls of a rolling mill.
A rolling mill for rolling rails is ordinarily asso
5
succession through the Chamber without unduly
disturbing the temperature conditions therein,
the entrance and exit spaces may be normally
closed by suitable means such as hinged flaps ca- 5
ciated with a lhot bank on which the rails are
pable of being de?ected by the articles as they
enter and leave the Chamber.
placed when they have left the rolls, either di
reCtly or after some preliminary Cooling opera
tion, and on which they remain until they have
cooled more or _less completely.
In the art of rolling railway or tramway rails
10
precautions should be taken to control the cool
ing of the rail when it has left the mill. In particul'ar, as has been explained in the speci?cation.
of our application Ser. No. 543,4'78, ?led Junev 10,
Referring to the drawings:Figure 1 is aplan view of a hot bank, a series of
live rollers for delivery of rails from a rolling mill 10
i
' 1931, care should be taken that when the tem
perature of the rail, which has left the mill at a
temperature above the well-known Critical range,
has fallen to a point not consequentiallylower than
500° C., the further cooling should occur under
20 such conditions that the interior and exterior por
tions of the mass of the rail, especially the big
mass of the rail head, should have substantially
' uniform temperature and that this unlformity
should be maintain'ed as far as possible while the
25 Cooling proceeds to about 350° C., whereafter it
is of nolparticular importance under -what con
ditions the further Cooling to atmospheric tem
perature takes place.
*
V
One of the objects of the present invention is
30 to provide an apparatus in the form of a Chamber
Figure 2 is a sectional side elevation and Figure
3 is a sectional end elevationa of the plant shown
in plan in Figure l.
_
15
'
Figure 4 is an enlarged sectional end elevation
of a slightly modified form of Athe oven or cham
ber.
i
*
'
Figure '5 is a fragmentary cross section of a
further modi?ed form of Chamber.
_
and are th'en'passed manually or mechanically 25
to and along the hot bank, and eventually enter
the oven. 3. ' It is to be observed that the rails
' travel- along the hot bank side by side so that
when they enter the oven each rail undergoes sub
.stantially the same thermal treatment at all 30
points along it.
rails emerging from a rolling mill and control
The oven 3 has two portions or compartments
04 and 5 (see Fig. 3) , each of Which comprises a roof v
Which extends across the hot bank in a single
or-ranges of temperature. More particularly this
object is attained by a Chamber having two func
tions one of which is to equalize as far as possible
the temperature throughout the hot rolled prod
ucts as they approach a predetermined temper
ature whilst the other is to then control the cool
40 ing of the same through a predetermined'range
'so that the Cooling is uniform, that is to say, is
such that no substantial temperature di?erentials
20
Referring first more particularly to Figures l,
2, and 3, it is seen that the rails delivered still hot
from the rolling mill travel endwise along the live
rollers i until they arrive next to the hot bank 2
or oven adapted to retard the rate of Cooling of
the nature of such Cooling within. a certain range
span by being suitablysuspended by girder work 35
6. The roof 'i of the first compartment 4 is
arched and composed of or lined with refractory
material that is a, poor conductor of heat such as
?reclay, silica bricks orl asbestos, Whilst the roof
t of the second Compartment 5 may be of metal 40
without any lining, or if lineci may have a lining
less massive than that used for the ?rst com
ature referred to, whilst one or more remaining
partment. As shown the roof 8 is a “lean-to”
in relation to the roof 1, this being a simple and
45
convenient construction.
Means, such as burners Q extending downwards
through the roof 'I from a gas supply main Hi are
provided to enable the necessary temperature to
be attained and maintained within the compart
Compartments produce a retarded cooling such
ment t.
in the body of each rail develop while it is cool
ing through such range.
A further object of the invention is to provide
a Chamber or oven as' aforesaid comprising two
or more portions or Compartments the first of
Which brings about the equalization of temper
50
to the bank, and an oven or Chamber extending
over a portion of the hot bank.
that the rails undergo a uniform bodily Cooling.
The oven or Chamber according to the present
invention is also preferably transportable so that
it can be shifte'd to take up any desiredposition
along .the hot bank or alongside the same.
-
till
It will beobvious that the temperature of com
partment t is higher than that of compartment
5. The two compartments are so- constructed, as
just pointed out, that the loss of heat from' com- l
partment 4 will be at a considerably slower rate 55
2
than the loss of heat from compartment 5. More
over, compartment 4 is provided with means for
adding heat, namely the burners, while" compart
partment 5 where they remain either at rest
or in slow motion for a lapse of time su?icient
to ensure that their temperature has fallen
ment 5 does not have such means.
slowly to about 350° C.
It is desirable that the ÅChamber or oven should ,
It is to be understood that the invention is in
effectively enclose or cover a section of the hot dependent of any heat treatment which the rails
bank, (or the ?oor of the site selected if the Cham
or other rolled products may have received prior
ber is not placed on the hot bank) in such a to their entry into the chamber or oven and that
manner that the sides as well as the ends of the it is also independent of any further Cooling
10 structure are brought down to or near to the level treatment to which they may afterwards be sub 10
of the hot bank or ?oor. For example, su?icient lected.
'
clearance may be made for the entrance and exit
Although the invention has been described with
of the rails beneath the sides of the chamber, or
reference to certain structural embodiments it
as shown in the drawings the clearances may be
is to be understood that it is not to be regarded
as limited thereto and that various Constructional 15
15 provided with depending ?aps ll and I 2 which
are deflected by each rail as it enters and leaves
the Chamber, but effectively close the Chamber
when the rails are inside.
If desired, there may be a partition between
20
the compartments, which partition may depend
from the roof with the necessary clearance be
neath it, or may be constituted by a flap of the
aforesaid kind as shown at l3.
It is preferable that the floor space beneath
the roof, or at all events the floor space of the
?rst compartment, should be paved with a suit
able material, such as refractory brick I4, so as
to prevent loss of heat and the introduction of
draughts.
30
'
It is evident that the oven 3 provides a rela
tively dead air space for the rails. The regular
hot bed or hot bank without the oven or cover
facilitates a circulation of the air about the cool
ing rails, the hot air rising and the cold air com
CD Cl ing up from beneath the rails. The oven 3
greatly Checks this air circulation, the space en
closed by the oven thus being a relatively dead
air space. The oven or cover performs this func
tion especially well when the ?oor space is paved,
_
40 as indicated at I 4.
The oven or Chamber shown in Figure 4 is
substantially the same as that shown in Figur-es
l, 2, and 3, but the heating means are duplicated
as shown.
The chamber or oven described above may be
stationary or adapted to travel so as to be placed
over any part of the hot bank, or over any part
of its site which may be adjacent to the hot
bank.
50
_
If adapted to travel the Chamber or oven is
mounted upon ?anged wheels |5 placed at its
extreme ends, and running upon rails IB beneath.
The oven may be moved either manually or by
power.
The rails, or other rolled products, are con
veyed into and through the Chamber or oven
by means of apparatus such as is generally used
for Conveying rails alongr a hot bank. The tem
perature at which the rails enter and leave the
60 Chamber or oven is determined b-y pyrometers,
or other suitable means, and the length of time
the material remains in the Chamber is governed
thereby.
When the rails are moved from the live rollers
l along the hot bank 2, they pass beneath the
flap Ii and enter the compartment 4, their tem
perature at the time of entry preferably being not
lower than about 500° C. at their external sur
face. Here they remain, either at rest or in slow
70 motion, until su?icient time has elapsed for the
temperature of the interior and exterior of the
mass of the rail, particularly that of the rail head,
to become approximately uniform and during
which time any Cooling is very much retarded.
75 The rails are then moved into the second com
modi?cations may be resorted to within the scope
of the appended claims. For example, the oven
or Chamber may extend over a floor space ad
jacent the hot bank instead of over an actual
portion of the hot bank so that the rails will 20
temporaríly leave the hot bank for treatment
in the oven' or Chamber and then return to it.
Having thus described our invention what we
claim as new and desire to secure by Letters
Patent is:25
1. In a rail treatment apparatus, a hot bed
and a rail protective cover extending across the
hot bed and adapted to cover but a portion there
of disposed in proximity to the top of the hot
bed to provide a relatively dead air space for the' 30
rails covered thereby.
2. In a rail treatment apparatus, a hot bed
and an oven of hood like formation adapted to
extend across the hot bed and to cover but a
portion thereof, and a heat retaining ?oor for 35
that portion of the hot bed beneath said oven.
3. In a rail treatment apparatus, a hot bed, an
oven of hood like formation adapted to extend
across the hot bed of width suñicient to cover a
plurality of rails on but a portion of the hot bed,
and means for varying the temperature in the
Ll Û
oven.
4. In a rail treatment apparatus, a hot bed, an
oven of hood like formation adapted to span the
hot bed of width su?icient to cover a plurality of
rails on but a portion of the hot bed, and means 45
for effecting relative transverse movement of
the rails and oven.
5. In a rail treatment apparatus, a hot bed,
an oven of hood like formation adapted to span
the hot bed of width suf?cient to cover a plural
ity of rails on but a portion of the hot bed, and
means for effecting movement of the oven trans
versely of the rails on the hot bed.
6. In a rail treatment apparatus, a hot bed, an ,
oven of hood like formation adapted to extend
across the hot bed substantially parallel with the
rails thereon and being of a width to cover a
plurality of rails on but a portion of the hot bed,
said oven having a plurality of Compartments (ll)
adapted to successively cover the rails upon rela
tive transverse movement of the rails and oven.
'7. In a rail treatment apparatus, a hot bed, an
oven of hood like formation adapted to extend
across the hot bed substantially parallel with
the rails thereon and being of a width to Cover. a
plurality of rails on but a portion of the hot
bed, said oven having a plurality of compart
ments adapted to successively cover the rails upon
relative transverse movement of the rails and
oven, and means for obtaining different tem
perature conditions in the different compart
ments.
8. In a rail treatment apparatus, a hot bed, a '
multi-compartment Chamber having different'V
3
2,1 15,690
capacities for retaining heat, means for suspend
tending over said ?oor, side walls extending from
ing the roofs of said compartments in a single
span across the hot bed to cover but a portion
said roof to Within a distance from said ?oor >to
thereof, and means for reguiating the thermal
beneath them, ?aps de?ectable by said products
conditions within one of said compartments.
as they pass under said side walls into and out
of said chamber, and heating means for applying
controlled heat to said Chamber.
_
9. In a rail treatment apparatus, a hot bed,
a Chamber for retarding the rate and controlling
the cooling of the hot rails' covering but a portion
of the hot bed, said portion of the hot bed being
10 paved to constitute av heat-retaining floor for
said chamber; .end walls, a single span roof ex
permit hot rolled products from the mill to pass
CHRISTER PETER SANDBERG.
^
OSCAR FRIDOLF ALEXANDER SANDBERG.
NILS PERCY PATRICK SANDBERG.
10
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