US2408016A

US2408016A - Open-hearth furnace repair unit

Info

Publication number: US2408016A
Application number: US575289A
Authority: US
Inventors: Jr John J Cain
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-01-30
Filing date: 1945-01-30
Publication date: 1946-09-24
Anticipated expiration: 1963-09-24

Description

Sept. 24; 1946. J. .1. CAIN, JR

OPEN HEARTH FURNACE REPAIR UNIT Filed Jan. 30, 1945 INVENTOR ATTOR Y Patented Sept. 24, 1946.

UNITED STATES PATENT OFFICE OPEN-HEARTH FURNACE REPAIR UNIT John J. Cain, JL, Youngstown, Ohio Application January 30, 1945, Serial No. 575,289

4 Claims. 1

This invention relates to an open hearth furnace repair unit and more particularly to a repair unit and a method of utilizing the same.

The principal object of the invention is the provision of a repair unit and method for placing the same in effective position in an open hearth furnace.

A further object of the invention is the provision of apparatus attachable to ordinary furnace loading means for handling a repair unit.

A still further object of the invention is the provision of a method of repairin the front Wal. of an open hearth furnace.

A still further object of the invention is the provision of a repair unit for an open hearth furnace incorporating means facilitating its place ment in position therein.

A still further object of the invention is the provision of means for charging a repair unit into an open hearth furnace and providing for a double pivoting action in bringing the repair unit into alignment with the area to be repaired.

The repair unit and method of installation shown and described herein has been designed to facilitate the repair and maintenance of the front wall portions of open hearth furnaces. t is well known that open hearth furnace walls frequently burn out and must of necessity be repaired or replaced with the resultant delay in the processing of the metal in the open hearth furnace. The present invention contemplates the provision of apparatus for attachment to the conventional furnace charging machines, which apparatus, by utilizing the mechanism of the furnace charging means, quickly and conveniently charges a preformed repair unit into the open hearth furnace and moves it into position in the area to be repaired. The repair is, therefore, made through one of the conventional front doors of the furnace and depends on the utilization of the conventional furnace charging equipment.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

The invention is illustrated in the accompanyin drawing, wherein:

Figure 1 is a front elevation of a portion of an open hearth furnace illustrating one of the charging doors thereof and showing the repair unit and placing means in position therein.

Figure 2 is .a side elevation of a portion of an open hearth furnace and illustrates the repair unit and the apparatus for placing the same therein in operative position.

Figure 3 is a side elevation of a portion of an open hearth furnace and illustrates the repair unit and apparatus for placing the same after having been turned degrees, the repair unit being pivoted into upright position as a result thereof.

Figure 4 is a side elevation of a portion of an open hearth furnace and illustrates the repair unit in position in the area being repaired,

By referring to the drawing and Figures 1 and 2 in particular it will be observed that an open hearth furnace has been partially illustrated and that a front wall thereof is generally indicated by.

the numeral IS and that one of the charge openings or doors thereof is indicated by the numeral H. A pair of buck stays i2 are illustrated which comprise vertically positioned supports which cooperate with the furnace struoture in holding the roof thereof in position. Figure 1 a dotted section it of the front wall It indicates an area to be repaired and by re-- ferring to the opening or charging door H, as shown therein, it will be observed that a charging arm M is shown extended therethrough into the interior of the open hearth furnace. An attach ment bracket i5 is formed to provide means of attachment between the charging arm. 14 and that portion of a conventional open hearth furnace charging machine which normally supports the charging box. In utilizing the present invention the charging arm [4 is attached to the conventional charging machine in place of a conventional charging box, thus enabling the charging machine equipment to be utilized in effecting a rapid and satisfactory repair operation.

Still referring to Figures 1 and 2 of the drawing it will be noted that the opposite end of the charging arm [4 is provided with a pivoted bracket I6 which is pivoted to the charging arm 14 by means of a pivot IT. The pivoted bracket I8 is provided with a pair of vertically positioned arms l8 and each of these vertically positioned arms I8 is provided with a pair of slots l9. The pivoted bracket It serves as a mounting means for a repair unit which is carried thereby and hence by the charging arm l4 and the conventional open hearth charging machine (not shown).

Still referring to Figures 1 and 2 of the draw- 3 ing it will be observed that the pivoted bracket it of the charging arm M has a repair unit 20 positioned thereon and that the repair unit 20 is held thereon by means of a plurality of headed studs 2| which engage the slots l9 in the arms I8 of the pivoted bracket Hi. In addition thereto the repair unit 28, which consists of a steel box 2i filled with suitable refractory materials, is provided with a drilled opening in which a rod 22 is positioned in a, manner so that it passes through both the repair unit 20 and an op in one of the arms 3. This rod 22 insures against the'displacement of the headed studs 2| from their positions in the slots [9 in the arms [8.

As is well known in th art, conventional open hearth charging machines are designed to charge a charging box into an open hearth furnace and turn the same more than 90 degrees from the position charged in order to drop the contents into the furnace. In utilizing the present invention the charging arm I4 is carried by the con- Ventional charging machine (not shown) and is, therefore, capable of being turned thereby.

By referring to Figure 3 of the drawing it will be observed that the charging arm M has been turned 90 degrees from the position illustrated in Figure 2 and that as a result of such turning the pivoted bracket l8 and the repair unit 26 thereon has swung, as indicated by the arrow, into vertical position immediately beside the charging arm I d and spaced therefrom a distance equal to the thickness of the pivoted bracket l6. In such position the repair unit may then be moved into the indicated location which, in Figures 1, 2 and 3, is indicated by the numeral l3.

Still referring to Figure 3 it will be observed that the upper portion of the front wall ID of the furnace has been burned away on an irregular angle and means has, therefore, been provided in connection with the repair unit 20 to fill in this space. Such means comprises an extension 23 formed on one end of the repair unit, the side sections 24 of which are formed of very light material so that they will crumble as the repair unit is drawn into place as illustrated in Figur 4. The space defined by the

metal forms

23 and 24 is filled with appropriate material such as dolomite.

Byreferring now to'Figure 4 of the drawing it will be observed that the charging arm M has been moved outwardly with respect to the open hearth furnace thereby bringing the repair unit 20 into position against the buck stays l2. In such position threaded bolts 25, which were previously positioned 'in the repair unit 20, engage cross pieces 26 placed across the buck stays l2 and are secured thereto. Still referring to Figure 4 it will be observed that when the repair unit 29 has been moved into appropriate position against the buck stays 12 of the open hearth furnace It) the rod 22 is driven from its location in the repair unit and arm l8. This permits the charging machine utilized in handling the chargarm I4 and hence the repair unit to be lowd ered slightly to disengage the slots IS in the arms I 8 from the headed studs H of the repair unit which action permits the charging mechanism including the pivoted bracket 16 to be moved away from the repair unit and Withdrawn through the furnace opening.

It will thus be seen that a practical and relatively simple method of repairing front walls of open hearth furnaces hasbeen disclosed in addition to apparatus for effecting such repair.

Having thus described my invention, what I claim is:

-1. Mechanism for repairing an open hearth furnace wall and including a charging arm having a bracket pivoted to one end thereof, the said charging arm adapted for mounting on a conventional charging machine, means formed on said bracket for carrying a repair piece, said bracket so formed as to pivot the repair piece into upright position upon the charging arms being turned degrees as by the charging machine.

2. In a mechanism for repairing an open hearth wall and including a charging arm adapted to be attached to a charging mechanism and extended into an open hearth furnace, a bracket pivotally affixed to said charging arm for holding a repair piece in a, horizontal and in a vertical position, the said pivoted bracket adapted to turn the said repair piece from horizontal to vertical position upon the said charging arms being rotated 90 degrees so as to bring the repair piece into appropriate position for movement into an area to be repaired.

3. A device for attachment to an open hearth furnace charging mechanism, said devic provided for the placement of a repair piece in the front wall of the said furnace and consisting of a charging arm having a bracket pivoted to an outermost end thereof, the said bracket having means formed thereon for holding a repair piece, the said pivot being located off-center with respect to the said bracket and repair piece, and the bracket and repair piece thereby adapted to turn from horizontal charging position into vertical patching position upon the partial rotatio of the charging arm by the said furnace charging mechanism. a

4. A device for attachment to an open hearth furnace charging mechanism, said device provided for the placement of a repair piece in the front wall of the said furnace and consisting of a [charging arm having a bracket pivoted to an outermost end thereof, the said bracket having means formed thereon for holding a repair piece,

the said pivot being located off-center with respect to the said bracket and repair piece and the bracket and repair piece thereby adapted to turn from horizontal charging position into vertical patching position upon the partial rotation of the charging arm by the said furnace charging mechanism. a 7

JOHN J. CAIN, JR.