WO2005073413A1 - Systeme de fermeture de four pit - Google Patents

Systeme de fermeture de four pit Download PDF

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Publication number
WO2005073413A1
WO2005073413A1 PCT/BR2005/000007 BR2005000007W WO2005073413A1 WO 2005073413 A1 WO2005073413 A1 WO 2005073413A1 BR 2005000007 W BR2005000007 W BR 2005000007W WO 2005073413 A1 WO2005073413 A1 WO 2005073413A1
Authority
WO
WIPO (PCT)
Prior art keywords
furnace
parts
beams
supporting
closing system
Prior art date
Application number
PCT/BR2005/000007
Other languages
English (en)
Inventor
Rodolfo Napoli
Massaco Simoyama Napoli
Original Assignee
Rodolfo Napoli
Massaco Simoyama Napoli
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=32854963&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2005073413(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Rodolfo Napoli, Massaco Simoyama Napoli filed Critical Rodolfo Napoli
Priority to US10/587,851 priority Critical patent/US7731892B2/en
Publication of WO2005073413A1 publication Critical patent/WO2005073413A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/70—Furnaces for ingots, i.e. soaking pits
    • 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
    • F27B17/00—Furnaces of a kind not covered by any preceding group
    • 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, removable covers
    • F27D1/1808—Removable covers
    • 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
    • F27D5/00—Supports, screens, or the like for the charge within the furnace
    • F27D5/0056—Hangers
    • 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
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/04—Circulating atmospheres by mechanical means
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C21D9/0025—Supports; Baskets; Containers; Covers

Definitions

  • the present Invention Patent of Pit Furnace Closing System with innovative conception and having important technological and functional improvements, in accordance with the most modern concepts of engineering and in conformity with the required rules and specifications, and which mainly differs from the other lid systems used in the conventional furnaces, so as to provide series of technical advantages, both practical and economical, having its features the novelty fundamental requirements .
  • the pit furnace consists of, in general, a tubular structure in the internal part of which the parts to be submitted to the high temperature are placed, in suspension and through convenient supports, for the purposes of tempera.
  • FIG. 1 illustrates, in a schematic manner, a pit furnace of the conventional type, which is formed by a structure (6) , which is closed by a lid
  • Figure 1 illustrates a schematic view of a pit furnace of the conventional type
  • Figure 2 illustrates an also schematic view, however, referring to the proposed pit furnace and its closing system
  • Figures from 3 through 18 illustrate views of variants for the device that conditions the part to be worked on inside the pit furnace in reference
  • Figures 19, 20, 21, 21A, 22A, 23 and 23A represent variations of complementary lids for closing the pit furnace yet within the scope of this patent.
  • the conventional pit furnace with lid system the structure of which is indicated by the reference 6 has a lid 7 that consists of a part similar to a cork, in the due proportions, that is, a lid made of A1020" steel plate with coating of bricks, and the lower plate must be A310" stainless steel, having linked an engine 8 to said lid for driving the helix 9, which is destined to promote the recirculation of the hot air inside the closed furnace.
  • the conventional pit furnace as may be verified in figure 1, presents a more complex construction, as well as a more expensive one, further counting on a star-like support 10, which is mounted on a basis of said support indicated by the numerical reference 11.
  • the parts are always supported or hung in a basket-like device, similar to a tree, with a central axis having several beams, being said parts hung in these beams.
  • This basket or tree may be supported on the floor of the furnace.
  • a lid itself does not close the pit furnace 1, as in the conventional systems.
  • two beams 2 are used, as well as A304* stainless steel square iron bars 4 having a diameter of 2 inches, laid across the border of the furnace structure 1 and supported over the beams 2. Its construction is simple and its cost is very reduced in relation to the conventional furnaces, and its walls have a very reduced, thickness in relation to the conventional pit furnace.
  • the closing means proposed by the present Invention Patent comprise the following: a) pieces of cloth wrap for high temperature are used for closing the furnace 3, cut in a manual way ox with the use of a sharp blade; b) a species of box in a stainless steel screen was further developed, folded and having a ring, which is filled in with remains of wraps; c) another form used is a biparted lid in a thin plate with wraps fixed to it and a cut for the upper part of the supporting device of the parts to pass.
  • This system is restricted so as to contain a single load, on the contrary of the other means, which allow for conditioning several parts in a same furnace .
  • the supports for the parts to be submitted to the high temperature are "cage" -like devices 5, which are suspended inside the furnace and supported in the two beams 2, not resting on the floor of the furnace, and several are the conditioning systems: a) the very light weighed parts may be fastened with a 3.2 mm wire approximately; b) the medium weighed and heavy parts will follow a table with the drawings of the more evident forms of conditioning; and c) other parts may be hung through welded rings in the parts themselves .
  • the pit furnace referred to herein has thermopairs, which may be in contact with the part entering into the mouth of the furnace, or may be loosen ones, and their heating ends are located in the central direction of each heating zone (thermopairs bar) .
  • this one allows protection gas to be used, and the surface is protected and the service may be performed on totally milled parts.
  • gas is not used; therefore, it is indicated to treat raw or previously milled parts; however, the advantages are numberless, mainly since it does not use refractory stainless steel baskets and, therefore, the operating cost is very reduced, generating the single means for making very large parts and very heavy ones, since they are hung in beams 2 external to the furnace 1 and for being not submitted to the heat, they are always cold and always resistant to support weight.
  • a pit furnace is forecast having oil heating and having a rectangular format, which is coated with refractory bricks fixed with stainless steel pins.
  • An end of the pin is welded in the plate of the furnace and the other part is welded in a square plate, which may contain a possible movimentation of the vertical walls of the furnace.
  • the burners may be fed with diesel oil or with viscous fuel oil.
  • the conditioning of the parts and their being put inside the furnace are similar to the one already described with regards to the tubular pit furnace, as it is further similar to the closing system with cloth wraps for high temperature or with boxes having rings in stainless steel screen, folded, and wraps.
  • Figure 19, 20, 21, 21A, 22, 22A, 23 and 23A represent variations of complementary lids for closing the pit furnace 1, as proposed.
  • FIG 21 depicts the fact that the lids are biparted 15 and touch each other when there is no load, and, when there is load, they touch the supporting device of the parts 14, leaving the device's internal space to be covered with wrap .
  • Figure 21A depicts a variation of the lid of figure 21.
  • the biparted lids, indicated in this case by reference 15, have a cut 16, which contributes for that there is a perfect mate with the bars of the device for supporting the parts 14.
  • the lids system of figure 21 is used for occasions in which only one device for supporting the parts will be put into the furnace, while the lid system of figure 21A serves for when the device for supporting the parts 14 have always the same dimensions.
  • Figures 22 and 22A depict lids systems that are used in the situations in which thin and hung parts are put into the furnace without the device for supporting the parts, that is, when the parts are fastened to the ring by means of weld. After the part is removed, it is closed with lids with the same measures of the holes 17.
  • Figure 23 depicts the fact that the beams 2 may be laid close to the internal diameter of the mouth 18 of the furnace. There will be, in this case, biparted doors 19 with rollers so as to aid with the displacements outwards or inwards.
  • Figure 23A depicts the condition of the putting into the furnace being with two devices for supporting the parts, in which a plate 20 that is adapted between the two devices for supporting the parts 14 is foreseen.
  • a plate 20 that is adapted between the two devices for supporting the parts 14 is foreseen.
  • the parts that are laid on the devices for supporting the parts 14 are indicated by reference P.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

L'invention concerne un système de fermeture de four pit qui repose sur l'utilisation de deux poutres (2), et de plusieurs barres de fer carrées (4) posées sur le rebord du four (3) et soutenues par les poutres (2). On utilise aussi des pièces d'emballage en tissu haute température pour fermer le four, ou une sorte de boîte dans un écran d'acier inoxydable, de type plié et comportant un anneau, que l'on remplit de restes de tissu, ou même encore un couvercle à deux parties (19) réalisé dans une plaque mince, des pièces de tissus étant fixées sur ce couvercle, une fente permettant le passage de la partie supérieure du support des éléments, ressemblant à une cage , que l'on suspend dans le four (3), qui repose sur les deux poutres (2), mais qui ne repose pas sur le fond du four (3), lequel (3) comporte des thermopaires pouvant être en contact avec la partie rentrant dans la bouche (18) du four (3).
PCT/BR2005/000007 2004-01-30 2005-01-21 Systeme de fermeture de four pit WO2005073413A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/587,851 US7731892B2 (en) 2004-01-30 2005-01-21 Pit furnace closing system

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BRPI0400619 BRPI0400619B1 (pt) 2004-01-30 2004-01-30 sistema de fechamento de forno poço.
BRPI0400619-4 2004-01-30
BRC10400619-4 2004-04-26

Publications (1)

Publication Number Publication Date
WO2005073413A1 true WO2005073413A1 (fr) 2005-08-11

Family

ID=32854963

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2005/000007 WO2005073413A1 (fr) 2004-01-30 2005-01-21 Systeme de fermeture de four pit

Country Status (2)

Country Link
BR (1) BRPI0400619B1 (fr)
WO (1) WO2005073413A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010009701A3 (fr) * 2008-07-24 2011-03-24 Ipsen International Gmbh Four à cornue utilisé pour traiter thermiquement des pièces à usiner métalliques
WO2012038420A1 (fr) * 2010-09-23 2012-03-29 Messier-Bugatti-Dowty Support pour pièce symétrique présentant deux branches latérales
US8246901B2 (en) 2008-07-14 2012-08-21 Ipsen, Inc. Retort furnace for heat treating metal workpieces
WO2013079951A1 (fr) * 2011-12-01 2013-06-06 Messier-Dowty Limited Méthode et appareil de traitement thermique
CN106319170A (zh) * 2016-10-20 2017-01-11 南京中船绿洲机器有限公司 一种热处理井式炉淬火工装及其装配方法
CN113699354A (zh) * 2021-09-27 2021-11-26 南京中船绿洲机器有限公司 一种热处理井式炉单一零件内装式淬火工装及装配方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB518012A (en) * 1938-05-03 1940-02-14 William Alfred Morton Improvements in and relating to furnace covers
US2792795A (en) * 1953-04-30 1957-05-21 Amsler Morton Corp Partible soaking pit cover
SU1067335A1 (ru) * 1982-06-23 1984-01-15 Днепропетровский Ордена Трудового Красного Знамени Металлургический Институт Крышка нагревательного колодца

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB518012A (en) * 1938-05-03 1940-02-14 William Alfred Morton Improvements in and relating to furnace covers
US2792795A (en) * 1953-04-30 1957-05-21 Amsler Morton Corp Partible soaking pit cover
SU1067335A1 (ru) * 1982-06-23 1984-01-15 Днепропетровский Ордена Трудового Красного Знамени Металлургический Институт Крышка нагревательного колодца

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8246901B2 (en) 2008-07-14 2012-08-21 Ipsen, Inc. Retort furnace for heat treating metal workpieces
WO2010009701A3 (fr) * 2008-07-24 2011-03-24 Ipsen International Gmbh Four à cornue utilisé pour traiter thermiquement des pièces à usiner métalliques
WO2012038420A1 (fr) * 2010-09-23 2012-03-29 Messier-Bugatti-Dowty Support pour pièce symétrique présentant deux branches latérales
FR2965339A1 (fr) * 2010-09-23 2012-03-30 Messier Dowty Sa Support pour piece symetrique presentant deux branches laterales
WO2013079951A1 (fr) * 2011-12-01 2013-06-06 Messier-Dowty Limited Méthode et appareil de traitement thermique
CN106319170A (zh) * 2016-10-20 2017-01-11 南京中船绿洲机器有限公司 一种热处理井式炉淬火工装及其装配方法
CN113699354A (zh) * 2021-09-27 2021-11-26 南京中船绿洲机器有限公司 一种热处理井式炉单一零件内装式淬火工装及装配方法

Also Published As

Publication number Publication date
BRPI0400619B1 (pt) 2009-05-05
BRPI0400619C1 (pt) 2004-12-21
BRPI0400619A (pt) 2004-08-17

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