US2113681A - Heating furnace - Google Patents

Heating furnace Download PDF

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Publication number
US2113681A
US2113681A US132818A US13281837A US2113681A US 2113681 A US2113681 A US 2113681A US 132818 A US132818 A US 132818A US 13281837 A US13281837 A US 13281837A US 2113681 A US2113681 A US 2113681A
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United States
Prior art keywords
billets
bars
heating furnace
furnace
hearth
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Expired - Lifetime
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US132818A
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Dennis William Warren
Robinson Allen
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Individual
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/147—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving on an inclined floor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/22—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace on rails, e.g. under the action of scrapers or pushers

Definitions

  • This invention ⁇ particularly relates to heating furnaces provided with' apparatus for preventing small billets or the like from buckling when being pushed therethrough.
  • An object of this invention is to provide means for facilitating the passage of billets through heating furnaces.
  • Figure 1 is a plan of one embodiment of our invention.
  • Figure ,2 is an elevation of Figure 1.
  • the numeral 2 indicates a heating furnace which has a charging end 4 and a discharging end 6.
  • a hearth B supports billets 9, or the like, that are placed inthe heating furnace 2. Any billets, or the like, that are placed in the heating furnace 2 are moved therethrough by suitable means (not shown), which are adapted to exert pressure upon the last billets placed in the heating furnace 2 and force all of the billets 9 toward the discharging end 6. This pressure upon the billets 9 causes a tendency to buckle, particularly if they have convex surfaces.
  • a plurality of heavy metal bars I0 are secured in the billet heating furnace 2 at the charging end 4; in some cases only one metal bar may be required.
  • the ilat bottom surfaces i2 are preferably relieved or terminate in upwardly directed curves adjacent the charging end 4 and those ends of the bars i0 arepivotally anchored in the heating furnace 2 by any suitable devices, such as eye-bolts and hangers I4.
  • the ends of the bars I0 are supported by eye bolts I6 that engage with means on the bars i0 to prevent the bars i0 from bearing upon the hearth 8.
  • the bars I0 are preferably secured substantially parallel to the direction of vmovement of the billets 9 through the heating furnace 2, but they must be mounted -to permit their surfaces I2 to ⁇ be parallel to the surface of the hearth 8.
  • the surfaces i2 ordinarily should be spaced from the hearth 8 a distance' that is 5 slightly less than the thickness of the .billets 9 placed thereon.
  • the bars l0 ordinarily need extend but a fraction of the length of the heating 25 furnace.
  • a heating furnace for billets or the like having a charging and a discharging end and a .35 hearthover which said billets are moved, said heating furnace being provided with means for pushing said billets therethrough, in combination with at least one heavy bar, means pivotally securing one end of said bar on the inside of said 40 furnace adjacent its charging end, said bar being positioned substantially parallel to said hearth at a distance therefrom slightly less than the thickness of the billets to be placed thereon, and yieldable means securedto the opposite end of 45 said bar to prevent said bar from dropping upon said hearth wherebysaid bar will float upon the upper surfaces of the billets when they are placed upon said hearth.
  • a heating furnace for billets or the like having a charging and a discharging end and a hearth over which said billets are moved, said heating furnace being provided with means for pushing said billets therethrough, in combinatiom with a plurality of heavy metal bars provided with ilat bottom surfaces that terminate in an upwardly directed curve at one end of each oi' said bars, means pivotally securing the curved ends of said bars on the inside of said furnace adiacent its charging end, said bars being normally positioned to permit their flat surfaces to be parallel to said hearth at a distance therefrom slightly less than the thickness of the billets to be placedl thereon, and adjustable yieldable means secured to the ends of said bars to pre- ⁇ vent said bars from dropping upon said hearth whereby said bars will float upon the upper surfaces of the billets when they are placed upon said hearth.
  • a continuous furnace for heating billets including a charging end, a discharging'end, a hearth over which the billets are adapted to move and means for pushing the its opposite end which is yieldably attached to the top of the furnace, said billets adapted to cam said bars upwardly'upon progressively entering thereunder and into said furnace so that the bot- Ltom surface or said bars rests upon said bmets,
  • the weight of the same being adapted to keep said billets from buckling as they pass through the furnace.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Description

Patented Apr. 12, 1938 UNITED STATES William\ HEA'IV'ING FURNACE Warren Dennis, Donora, and Allen Robinson, Monongahela, Pa.
Application March 24, 1937, serial Nn. 132,818
3 Claims.
This invention `particularly relates to heating furnaces provided with' apparatus for preventing small billets or the like from buckling when being pushed therethrough.
As the sides of the grooves in rolls wear away from use, they become concave and billets having slightly convex surfaces are produced. When these billets are charged side by side in reheating furnaces, and an attempt to push them therethrough is made, they have a tendency to rock on the convex surfaces and buckle out of line, forming a jumbled mass. If the billets buckle they should immediately be removed from the heating furnace to preventr them becoming misshapened and bent due to their own weight; but even then, in many cases, they must be straightened before they can be recharged in the furnace.
An object of this invention is to provide means for facilitating the passage of billets through heating furnaces.
'Ihe above and further objects will be made apparent by. referring to the following description and the accompanying drawing, in which:
Figure 1 is a plan of one embodiment of our invention; and,
Figure ,2 is an elevation of Figure 1.
Referring more particularlyto the drawing, the numeral 2 indicates a heating furnace which has a charging end 4 and a discharging end 6. A hearth B supports billets 9, or the like, that are placed inthe heating furnace 2. Any billets, or the like, that are placed in the heating furnace 2 are moved therethrough by suitable means (not shown), which are adapted to exert pressure upon the last billets placed in the heating furnace 2 and force all of the billets 9 toward the discharging end 6. This pressure upon the billets 9 causes a tendency to buckle, particularly if they have convex surfaces. f
In order to prevent the billets 9 from buckling when force is exerted on them, a plurality of heavy metal bars I0, provided with flat bottom surfaces I2, are secured in the billet heating furnace 2 at the charging end 4; in some cases only one metal bar may be required. The ilat bottom surfaces i2 are preferably relieved or terminate in upwardly directed curves adjacent the charging end 4 and those ends of the bars i0 arepivotally anchored in the heating furnace 2 by any suitable devices, such as eye-bolts and hangers I4. The ends of the bars I0 are supported by eye bolts I6 that engage with means on the bars i0 to prevent the bars i0 from bearing upon the hearth 8. The bars I0 are preferably secured substantially parallel to the direction of vmovement of the billets 9 through the heating furnace 2, but they must be mounted -to permit their surfaces I2 to`be parallel to the surface of the hearth 8. The surfaces i2 ordinarily should be spaced from the hearth 8 a distance' that is 5 slightly less than the thickness of the .billets 9 placed thereon. By mounting the bars I0 in this manner, they iioat upon. or are supported by, the upper surfaces of the billets 9.' If the heating furnace is to heat varying sized billets, the means l0 that mount the bars i0 must be adjustable so that the bars I0 can be placed in the lsame position relative to any billets placed in the heating furnace.
lin some cases, it may be desirable to mount 15 the bars i0 so that they do not ordinarily contact the billets 9 placed in the heating furnace. 'I'he bars I0 should then be positively supported parallel to but slightly above the'billets 9 so that the billets 9 would still be prevented from buckling by 20 immediately striking the fixed bars I0.
As the tendency ofthe billets 9 to buckle is most pronounced when they are adjacent the charging end 4, the bars l0 ordinarily need extend but a fraction of the length of the heating 25 furnace.
While we have shown and described a specific embodiment of the invention, it will be understood that we do not wish to be limited exactly thereto, since various modifications of the inven- 80 tion may be made Without departing from the scope thereof, as denedby the following claims.
We claim:
1. A heating furnace for billets or the like having a charging and a discharging end and a .35 hearthover which said billets are moved, said heating furnace being provided with means for pushing said billets therethrough, in combination with at least one heavy bar, means pivotally securing one end of said bar on the inside of said 40 furnace adjacent its charging end, said bar being positioned substantially parallel to said hearth at a distance therefrom slightly less than the thickness of the billets to be placed thereon, and yieldable means securedto the opposite end of 45 said bar to prevent said bar from dropping upon said hearth wherebysaid bar will float upon the upper surfaces of the billets when they are placed upon said hearth.
2. A heating furnace for billets or the like having a charging and a discharging end and a hearth over which said billets are moved, said heating furnace being provided with means for pushing said billets therethrough, in combinatiom with a plurality of heavy metal bars provided with ilat bottom surfaces that terminate in an upwardly directed curve at one end of each oi' said bars, means pivotally securing the curved ends of said bars on the inside of said furnace adiacent its charging end, said bars being normally positioned to permit their flat surfaces to be parallel to said hearth at a distance therefrom slightly less than the thickness of the billets to be placedl thereon, and adjustable yieldable means secured to the ends of said bars to pre- \vent said bars from dropping upon said hearth whereby said bars will float upon the upper surfaces of the billets when they are placed upon said hearth.
3. In a continuous furnace for heating billets, 'said furnace including a charging end, a discharging'end, a hearth over which the billets are adapted to move and means for pushing the its opposite end which is yieldably attached to the top of the furnace, said billets adapted to cam said bars upwardly'upon progressively entering thereunder and into said furnace so that the bot- Ltom surface or said bars rests upon said bmets,
the weight of the same being adapted to keep said billets from buckling as they pass through the furnace.
- WARREN DENNIS.
ALLEN ROBINSON.
US132818A 1937-03-24 1937-03-24 Heating furnace Expired - Lifetime US2113681A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2616679A (en) * 1949-03-31 1952-11-04 Morgan Construction Co Furnace for heating metal bars
US3491989A (en) * 1968-07-03 1970-01-27 Weyerhaeuser Co Apparatus for heating moving sheet materials

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2616679A (en) * 1949-03-31 1952-11-04 Morgan Construction Co Furnace for heating metal bars
US3491989A (en) * 1968-07-03 1970-01-27 Weyerhaeuser Co Apparatus for heating moving sheet materials

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