US3306268A - Hollow sheet metal structure - Google Patents

Hollow sheet metal structure Download PDF

Info

Publication number
US3306268A
US3306268A US492643A US49264365A US3306268A US 3306268 A US3306268 A US 3306268A US 492643 A US492643 A US 492643A US 49264365 A US49264365 A US 49264365A US 3306268 A US3306268 A US 3306268A
Authority
US
United States
Prior art keywords
fluid
face plate
maximum heat
door
heat zone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US492643A
Other languages
English (en)
Inventor
Steven J Humanic
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
United States Steel Corp
Original Assignee
United States Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by United States Steel Corp filed Critical United States Steel Corp
Priority to US492643A priority Critical patent/US3306268A/en
Priority to GB41043/66A priority patent/GB1150963A/en
Priority to ES0331795A priority patent/ES331795A1/es
Priority to NL6613939A priority patent/NL6613939A/xx
Priority to DE19661508277 priority patent/DE1508277A1/de
Application granted granted Critical
Publication of US3306268A publication Critical patent/US3306268A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/18—Door frames; Doors, lids or removable covers
    • F27D1/1858—Doors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M7/00—Doors
    • 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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces

Definitions

  • Conventional hollow sheet metal structures such as open hearth furnace doors, are provided with an open faced recess or pocket in the high temperature face, which recess has a depth of about one-half of the thickness of the furnace door.
  • This recess is provided with a refractory lining, either a plastic basic refractory lining, such as chrome ore (rammed on steel studs set in bottom wall of the recess) or a fire clay brick lining.
  • Such refractory lining is subject to the intense heat in the melting chamber of the open hearth furnace and after about twelve heats, the portion of the refractory lining in the maximum heat zone, usually the top central portion of the furnace door, begins to burn off, thus materially reducing the weight of the stud type, water cooled or rammed furnace door. As a result of this weight loss malfunctioning of the counterweighted hoist system which raises and lowers such furnace door occurs. Further the bottom wall of the recess is exposed to the intense heat thus causing buckling or rupturing of such bottom wall, particularly adjacent the tie studs, utilized to hold the bottom Wall and the low temperature face plate together.
  • Such buckling and rupturing is caused by'the expansion and contraction of the bottom wall when exposed to temperatures ranging from ambient temperature (about 4080 F.) to about 3200 F. and occurs in conventional open hearth doors after about eighty heats .in the first campaign for the furnace door and progressively after fewer heats in successive campaigns. Labor and material costs to repair the rammed-type furnace door are high.
  • (1) has an operational life more than about five times greater than the operational life of a conventional water cooled refractory lined furnace door
  • an improved hollow furnace door for a high temperature furnace having a wall provided with a door aperture and having a door frame in the door aperture.
  • the hollow furnace door is movable on the door frame from an open position to a closed position.
  • the furnace door has a high temperature inner face plate disposed adjacent the door frame and a maximum heat zone.
  • a low temperature outer face plate is opposite the high temperature inner face plate.
  • Closure means are adjacent the high temperature inner face plate and the low temperature outer face plate and define with the high temperature inner face plate and the low temperature outer face plate a fluid chamber.
  • a partition member is disposed in the maximum heat zone between the high temperature inner face plate and the low temperature outer face plate and divides the fluid chamber into a first fluid compartment and a second fluid compartment. This partition member provides two-way stretch in the furnace door adjacent the maximum heat zone and removes heat from the maximum heat zone to the closure means.
  • Each of the first fluid compartment and the second fluid compartment has a first conduit means connected thereto and is adapted to introduce a fluid into one corner thereof.
  • a second conduit means is connected thereto and is adapted to remove fluid from an opposite corner thereof, thereby swirling the fluid through the maximum heat zone in a generally circular path between the closure means and the partition member and simultaneously removing a portion of the fluid therefrom and substantially reswirling the remainder of the fluid through the maximum heat zone in such generally circular path.
  • FIGURE 1 is a fragmentary perspective view of a portion of a high temperature furnace wall showing the door frame and the improved furnace door of this invention
  • FIGURE 2 is -a front elevational view of the furnace door showing the maximum heat zone and the swirling action of the fluid with the inner plate partially broken away;
  • FIGURE 3 is a in FIGURE 2;
  • FIGURE 4 is a side elevational view of the furnace door taken from the right side of FIGURE 2;
  • FIGURE 5 is a fragmentary view similar to FIGURE 2 of an alternative embodiment and showing the inner plate
  • FIGURES 6 and 7 are views similar to FIGURE of further alternative embodiments.
  • the hollow sheet metal structure of the present invention is particularly adapted for use as a hollow door on an open hearth furnace and hence it has been so illustrated and will be so described.
  • FIGURE 1 a front wall of an open hearth furnace is indicated generally by the reference numeral 10.
  • This wall 10 has a door aperture 12 (FIGURE 1) and a water-cooled door frame 14 (of the type shown in the above mentioned US. Patent No. 1,168,647) disposed in the door aperture 12.
  • a hollow furnace door 16 (FIGURES 1, 2) of this invention is movable on the door frame 14 from an open position (not shown) to a closed position (FIGURE 1) by an elevating mechanism.
  • This elevating mechanism has a hoisting chain 18 (FIG- URE 1) disposed behind a superstructure 19 and extending from a counterweighted elevating means, such as a hoist (not shown) to a door hanger 20 (FIGURE 1), which door hanger 20 is connected by a linkage 22 (FIG- URE 1) to clevises 24 (FIGURES 1-4) upstanding from the furnace door 16.
  • a safety chain 26 (FIGURE 1) connects an eye 27 (FIGURES 1-4) to a bolt 28 on the superstructure 19 of the wall 10.
  • This furnace door 16 has a high temperature inner face plate 30 (FIGURES 3, 4), which face plate 30 is disposable adjacent the door frame 14 and is provided (when subjected to the heat of the melting chamber of the furnace) with a maximum heat zone Z (FIGURES 1 and 2).
  • This maximum heat zone Z is determined by temperature measurements or approximated by the deterioration pattern of a conventional rammed-type furnace door (not shown).
  • the shape of the door frame 14 and the height of the insulating means, suitably dolomite 31 (FIGURE 1) determine the generally elliptical shape of the maximum heat zone Z shown in FIG- URES 7 and 2.
  • a low temperature outer face plate 32 (FIGURES 1-4) is disposed opposite the inner face plate 30.
  • C10- sure means such as the side plates 34 (FIGURES l-4) and end plates 36 (FIGURES 2-4) are sealingly secured to the inner face plate 30 and outer face plate 32 and define with such inner face plate 30 and outer face plate 32 a fluid chamber 37 (FIGURES 2, 3).
  • the closure means can be one integral member, as shown in FIGURE 4, and bottom end plate 36 is rounded at 36:: to prevent contact between such bottom end plate 36 and the door frame 14, thus extending the life of such bottom end plate 36.
  • a partition member 38 (FIGURE 2) is disposed in the maximum heat zone Z between the inner face plate 30 and outer face plate 32 and in engagement with a wicket 39 (FIGURES 1, 2, 4) for sealingly dividing the fluid chamber 37 into a first fiuid compartment 40 and a second fluid compartment 42 (FIGURES 2-4).
  • This partition member 38 provides two-way stretch to the furnace door 16 adjacent the maximum heat zone Z and removes heat from the maximum heat zone Z to the closure means and face plates 30, 32 by means of radiation, convection and conduction.
  • the maximum heat zone Z contains a minimum number of tie studs 44 (between the face plates 30, 32).
  • tie studs 44 between the face plates 30, 32.
  • 6 only two such tie studs 44 are shown, one tie stud 44 on each side of of the partition member 38, thereby facilitating the two-way stretch properties of the furnace door 16.
  • Each of the compartments 40, 42 have a first conduit means, suitably an inlet line 46 (FIGURE 1) from a water supply, such as the plant service water system, an inlet 48 (FIGURES 1-4) in furnace door 16 and a guide member 50 (FIGURES 2, 3) within the furnace door 16 for introducing a fluid, such as river water, into one corner 52 (FIGURE 2) of the compartments 4%, 42.
  • a second conduit means suitably an outlet 54 in the furnace door 16 and an outlet line 56 (extending to a sewer,- such as a flume discharge and sewer) removes the c'i'rculated river water from an opposite corner 58 (FIGURE 2) of the compartments 40, 42.
  • the river water in the compartments 40, 42 swirls through the rriaximurri heat zone Z in a generally circular path between the closure means and the partition members 38 (along the line of the arrows marked with a subscript 1) splitting off through outlet 54 and in the generally circular path in-' dicated by the arrows marked with a subscript 2.
  • the outlet 54 removes a portion of the river water during the first pass and reswirls substantially the remainder of the river water through the maximum heat zone Z in the generally circular path indicated by the arrows with subscript 2 until such remainder rejoins the initial pass flow' and is removed from the compartments 40, 42 by the outlet 54.
  • random vortex zones V (FIGURE 2) are created by the violent movement of the river water therein and such vortex zones V enhance the cooling efiect of the river water on the maximum heat zone Z.
  • FIGURE 5 the fluid flow may be reversed, entering through inlet 48 at corner 52 and exiting at corner 58 through guide member 50 and an outlet 54 I I
  • an outlet 54 is disposed within a bafiie chamber 60 defined by a bafi le 62, the top end plate 36 and the face plates 30, 32.
  • guide member 50 is shortened and guides 64a, 64b, are employed.
  • the doors 16 etc. eliminate the need for the refractory lining and in the case of the stud-type furnace door the need for the lining studs and have repair costs about one fifth the repair costs of the conventional refractory lined door.
  • the partition member 38 (FIG- URES 1-4) provides a two-way stretch adjacent the maximum heat zone Z of the furnace doors 16 etc., thereby substantially eliminating buckling and splitting or rupturing of the high temperature face plate 30. Such partition member 38 also provides controlled heating in the maximum heat zone Z of the furnace doors 16, etc.
  • the simple, rugged structure of the partition member 38 adjacent the maximum heat zone Z of the furnace doors 16, etc. is resistant to buckling and splitting or rupturing of the high temperature face plate 30, particularly adjacent tie stud welds 44.
  • the inlet means (inlet line 46, inlet 48 and guide member 59, FIGURE 1, etc.) and outlet means (outlet 54, FIGURE 1, etc.) provide complete, uniform and rapid fluid blanketing and hence maximum cooling of the maximum heat zone Z of the furnace doors 16,
  • a hollow furnace door movable on said door frame from an open position to a closed position, said furnace door having:
  • closure means adjacent said high temperature inner face plate and said low temperature outer face plate and defining with said high temperature inner face plate and said low temperature outer face plate a fluid chamber
  • each of said first fluid compartment and said second fluid compartment having:
  • furnace door recited in claim 1 and having guide means adjacent said partition member, said first conduit means and said second conduit means for streamlining fluid flow through said fluid compartments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US492643A 1965-10-04 1965-10-04 Hollow sheet metal structure Expired - Lifetime US3306268A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US492643A US3306268A (en) 1965-10-04 1965-10-04 Hollow sheet metal structure
GB41043/66A GB1150963A (en) 1965-10-04 1966-09-14 Furnace Door for High Temperature Furnace
ES0331795A ES331795A1 (es) 1965-10-04 1966-09-30 Perfeccionamientos en dispositivos de cierre para hornos.
NL6613939A NL6613939A (enrdf_load_html_response) 1965-10-04 1966-10-03
DE19661508277 DE1508277A1 (de) 1965-10-04 1966-10-03 Ofentuere

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US492643A US3306268A (en) 1965-10-04 1965-10-04 Hollow sheet metal structure

Publications (1)

Publication Number Publication Date
US3306268A true US3306268A (en) 1967-02-28

Family

ID=23957040

Family Applications (1)

Application Number Title Priority Date Filing Date
US492643A Expired - Lifetime US3306268A (en) 1965-10-04 1965-10-04 Hollow sheet metal structure

Country Status (5)

Country Link
US (1) US3306268A (enrdf_load_html_response)
DE (1) DE1508277A1 (enrdf_load_html_response)
ES (1) ES331795A1 (enrdf_load_html_response)
GB (1) GB1150963A (enrdf_load_html_response)
NL (1) NL6613939A (enrdf_load_html_response)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4418649A (en) * 1982-11-02 1983-12-06 Purvis James E Boiler structure
FR2669104A1 (fr) * 1990-11-12 1992-05-15 Siderurgie Fse Inst Rech Dispositif de manóoeuvre d'une porte de four electrique a arc pour installations metallurgiques.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1191518A (en) * 1915-12-01 1916-07-18 Knox Pressed & Welded Steel Company Hollow sheet-metal furnace-door structure.
US1391196A (en) * 1920-05-06 1921-09-20 Law George Open-hearth-furnace door and frame
US3106911A (en) * 1961-03-29 1963-10-15 Republic Steel Corp Furnace door frame
US3198178A (en) * 1962-07-17 1965-08-03 June H Reighart Open hearth furnace door

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1191518A (en) * 1915-12-01 1916-07-18 Knox Pressed & Welded Steel Company Hollow sheet-metal furnace-door structure.
US1391196A (en) * 1920-05-06 1921-09-20 Law George Open-hearth-furnace door and frame
US3106911A (en) * 1961-03-29 1963-10-15 Republic Steel Corp Furnace door frame
US3198178A (en) * 1962-07-17 1965-08-03 June H Reighart Open hearth furnace door

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4418649A (en) * 1982-11-02 1983-12-06 Purvis James E Boiler structure
FR2669104A1 (fr) * 1990-11-12 1992-05-15 Siderurgie Fse Inst Rech Dispositif de manóoeuvre d'une porte de four electrique a arc pour installations metallurgiques.

Also Published As

Publication number Publication date
DE1508277A1 (de) 1969-10-16
NL6613939A (enrdf_load_html_response) 1967-04-05
GB1150963A (en) 1969-05-07
ES331795A1 (es) 1967-07-01

Similar Documents

Publication Publication Date Title
US3306268A (en) Hollow sheet metal structure
CN203629296U (zh) 带均热功能的铝扁锭坑式加热炉
US2529272A (en) Flared jamb furnace door frame
US3779183A (en) Tire incinerator
US2355142A (en) Furnace door
US3211546A (en) Method of loading a melting furnace
SU744205A1 (ru) Печь дл термической обработки крупногабаритных изделий
GB997531A (en) Aluminium annealing furnace
US2426568A (en) Furnace door
US2991060A (en) Reverberatory furnace
US1407708A (en) Furnace-door frame
US1551945A (en) Continuous-heating furnace
CN206019340U (zh) 一种铜冶炼炉水冷炉门框
US2017480A (en) Metallurgical furnace
US2550729A (en) Furnace door
US3282580A (en) Refractory bottom for open hearth furnace
US2679389A (en) Furnace structure
US2415761A (en) Open-hearth furnace
US1517172A (en) Muffle furnace for heat treatment of steel
US2400300A (en) Regenerative furnace
US2637286A (en) Self-contained replaceable panels for open hearth furnaces
US2490382A (en) Melting furnace
US2882844A (en) Cover for industrial furnace
US2155418A (en) Furnace construction
US2369419A (en) Heating furnace