US846506A

US846506A - Continuous heating-furnace.

Info

Publication number: US846506A
Application number: US21794104A
Authority: US
Inventors: Harry Parrock
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-07-25
Filing date: 1904-07-25
Publication date: 1907-03-12
Anticipated expiration: 1924-03-12

Description

PATENTED MAR. 12, 1907. H. PARROGK & W. MoKEE.

CONTINUOUS HEATING FURNACE. APP'LIOATION FILED JULY 25, 1904.

a sums-41131251 WITNESSES INVENTORS N9. 846,506. PATENTED MAR. 12, 1907.

\ H. PARROGK & w. MoKBE.

CONTINUOUS HEATING FURNACE APPLICATION FILED JULY 25, 1904. s SHEETS-$HEET 2.

INVENTORS PATENTED-MAR. 12, 1907, H. PARROOK & W. MQKEE.

CONTINUOUS HEATING FURNACE APPLICATION FILED JULY 25, 1904.

-3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

HARRY PARROOK, or YOUNGSTOWN, AND WILLIS MoKEE, or ELYRIA, a OHIO; SAID PARROCK ASSIGNOR TO SAID MoKEE,

CONTINUOUS HEATING-FURNACE.

Specification of Letters Patent.

Patented March 12,1907.

Application filed July 25. 1904. Serial No. 217,941

Figure 1 is a longitudinal vertical section Showing one form of our improved furnace.

Fig. 2 is a horizontal section of the same, partly broken away. Fig. 3 1s a cross-section on the line Ill III of Fig. 1 looklng toward the left; and Fig. 4 1s a view similar to F 1g. 1, showing a modified form.

Our invention relates to, the class of con tinuous heating-furnaces where a row of metal billets or blooms is pushed through a long furnace of tunnel form.

The object of'the invention is to provide a simple and efficient construction in which theflame and gases may be conveniently distributed and the exit'-ports therefore not closed at any time by the entering billets or metal pieces.

It is further designed to provide for a simple and efficient feed-out arrangement, to thoroughly mix the air and gas, to reduce the number of valves, and provide for heating the air where desired.

In the drawing, referring to the form of Figs. 1, 2, and 3, 2 represents the hearth portion, and 3 the longitudinal piers, of a continuous heating-furnace 4. The longitudinal piers extend from the transverse outlet-flue 5 to the hearth and are preferably out through transversely at several points to allow the flame and gases to circulate more easily .and thoroughly in theiheating-chamher. The piers 3, between the cross-arch 6 and the port 5, are preferably out through to or nearly to the line of the furnace-floor, while the piers 3", which extend continuously to the hearth, areonly partially cut through, therecesses extending only a fraction of their depth.

The roof of the, furnace has at an intermediate point a vertical cross-arch 6, the portion of the roof between said arch and the coinbustion-chamber being higher than the portion between the arch and the billetreceiving end of the furnace. The cross-arch part of this specification,

films a cleaning door or doors extending through t at a downward Inclination and closed by a cover 14. The cross-arch is important because it provides a high space at the combustion-chamber, is strong and durable, and by suddenly reducing the space for passage of the gases it affords a more e'llicient heating action for the billets.

As scale is liable to drop from the billets or pieces before reaching the hearth, we preferably form the furnace-bottom between the piers with opposite inclines 7 and 8, as shown in Fig. 1, these inclines extending longitudinally of the furnace-chamber. Between the inner lower portions of these inclines the floor is preferably provided with holes 9, which lead downward completely through the furnace-bottom and into'the open space 10 below the bottom. The furnace-bottom may be supported upon the transverse I- beams 10, as shown, 11 being the tie-rods connecting the buckstaves 12 on opposite sides of the furnace. The space below the furnace-bottom is open at the sides throughout the distance from the flue 5 to the port 13, through which the billets drop. The holes 9 may be normally closed by suitable, 'doors. By removing the covers 14 and inserting a suitable pusher or rake through the holes in the arch 6 the scale may be moved along the opposite inclines and caused to drop through the holes 9 upon the floor below the furnacebottom. 7

The Water-cooled pipes 15 extend along the longitudinal ,piers, the billets or metal pieces sliding over these bars. At their inner ends the bars are extendeddownwardly through the hearth, as Shown at 16, their parts below the furnace-bottom being led out laterally for suitable water connections.

The hearth may be formed of any desirable material, and between itand tlie fuel-ports is the port or slot 13, through which the billets drop. This port is preferably arranged as shown with an angular portion which shifts the direction of the drop of the billets, the lower inclined part 17 being preferably lined with metal plates 17 and provided with a loose hanging door- 18, which may close the opening as it hangs in vertical position and is pushed back by the dropping piece. This inclined portion is above a transverse rest or support 19, which is merelya platform extending below the feed-out opening. On

IOU

opening 22 this platform lies a forked pusher 20, which is connected to'a hydraulic cylinder 21, the billet or piece dropping between the legs of the fork. After the billet has thus dropped the forked pusher is moved endwise and the billet pushed out upon a suitable conveyer at one side of the furnace. 7

As the billets are pushed in through the they are liable to shut off or choke the entrance to the outlet-port 5 for the gases. In order to overcome this trouble, we arrange this port 5 across the furnace, preferably widen it at the top, and extend it endwise to form the offset portions at opposite ends. These portions 23 extend into the side walls and form extensions of the port which leads down into the double-surface regenerator- 24. I As the ends of the ofl'takeport extend beyond the length of the billet, the gases are always given free exit beyond the billet ends, thus preventing choking of the gases and improper working of the fur nace. The regenerator 24 may be of the or .dinary double-surface type, the products flowing to the left in Fig. 1 and passing out through flue 25, while the air which enters through pipe26 and flows in sheets between the bricks 27 passes through the lines 28 and around to the flue 29. The gas enters through the flue 30 and passes through valved openings 31 into the lines 32, whence it rises through the divided checker-work chamber 33 and unites with the hot airin the chamber 34, the products. thence flowing throu h the length of the furnace to the offtakeue.

v The furnace is operated intthe usual manner, the line of billets lying on the water cooled ,bars and being pushed in, through port 22. At the inner end of the hearth the billets drop from the feed-out opening onto the support below the furnace-bottom and are pushed endwi se by the forked pusher and drop on a suitable eonveyer,

In Fig. 4 we showa form similar to'that'of the first figures, similar parts being designated by similar numerals,- except that no regenerator is employed and the heat Is supplied from a coal-fired furnace 35. The con struction is otherwise similar to the first form. i

The advantages of our invention resultfrom the offset portions of the oiftal're-flue pro ect1ng beyond the ends of the billets or metal pieces, also from the arrangement of the longitudinal scale-cavities between the longitudinal piers and the roof-holes for pushing the scale through the bottom holes between the longitudinal piers, also from the arrangement of the forked pusher and feedout opening, the whole giving a simple, strong, and efficient construction.

Variations may be made in the form and arrangement of the parts without departing from our invention.

We claim- 1. A continuous heating-furnace having a hearth at one end and an intake at the other end, spaced piers extending longitudinally between the intake and heartlnthe floor of the furnace between the piers being provided with scale-pockets having discharge-openings leading downwardly through the bottoms of the pockets, the roof of the furnace having openings disposed to. give access therethrough to the respective pockets for forcing scale through the discharge-openings substantially as described.

2. A continuous furnace having a combustion-chamber at one end and an intake at the other end, the roof portion adjacent the combustion-chamber being elevated above the front roof portion, a cross-arch closing the space between the two roof portions, the

floor of the furnace having a scale-pocket beneath the elevated roof portion and provided with a discharge-opening, the cross-arch having an opening disposed to give access therethrough to the scale-pocket for forcing scale through the-discharge-opening substantially as described. i

3. A continuous heating-furnace having a hearth at one end and an intake at the other end, the roof portion of the furnace over the hearth being elevated above the front roof portion, across-arch closing the space between the two roof portions, longitudinal piers supported upon the floor of the furnace and leading to the hearth, scalepockets in "the furnace-floor between'the piers and beneath the elevated roof portion, said pockets having discharge openings leading downwardly through their 'bottoms, the cross-arch having-openings disposed to give access therethrougli. to the respective pockets for forcing scale through the discharge-openings substantially as described.

4. A continuous heating-furnace having a feed-out opening through its floor, a billetsupport belowthe opening, and a reciprocating pusher workingacross said support; substantially as described.

5. A continuous heating-furnace having a feed-out opening through itsfloor and inclinedto the vertical, said opening leading downwardly'toward the intake of the furnace, and a vertically-disposedswinging.

door mounted within andnormally closing said opening substantially as described.

6. A continuous heating-furnace having a feed-out, opening leading downwardly through its floor, a stationary billet-support located below the opening in position to receivethe billets when they pass through said opening, and means working across the top of the support to move the billet along said support substantially as described.

7. A continuous heating-furnace having a feedout opening leading downwardly through its floor, a billet-support below the -mounted within and closing the feed-out opening, a billet-support located below the opening in position to receive billets discharging therethrough, and means worklng across the t'ogljf the support to move billets thereacross su stantially as described.

9. A continuous heating-furnace having an intake extending the full width of the furnace, an upright outletflue at the intake end of the furnace intersecting the intake-passage and extending at opposite sides thereof for a vertical distance above the bottom of the passage exceeding the thickness of a billet substantially as described.

10. A continuous heating-furnace having an intake extending the full width of the furnace, an outlet-flue at the intake end of the furnace intersecting the bottom of the intakepassage and extending at opposite sides thereof throughout the height of the intakepassage substantially as described.

In testimony whereof we have hereunto set our hands. v r

HARRY PARROCK. WILLIS MOKEE.

, Witnesses as to Parrock:

Tnos. H. JENKINS, JOHN W. WRIGHT.

Witnesses as to McKee;

E. STEWART, B. T. NE'SBETT.