US3743132A - Vertical tube furnace for high operating pressure - Google Patents

Vertical tube furnace for high operating pressure Download PDF

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Publication number
US3743132A
US3743132A US00228015A US3743132DA US3743132A US 3743132 A US3743132 A US 3743132A US 00228015 A US00228015 A US 00228015A US 3743132D A US3743132D A US 3743132DA US 3743132 A US3743132 A US 3743132A
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US
United States
Prior art keywords
seal
cylinder
chamber
pressure cylinder
heat
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
US00228015A
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English (en)
Inventor
H Larker
M Lindberg
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Application granted granted Critical
Publication of US3743132A publication Critical patent/US3743132A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/001—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a flexible element, e.g. diaphragm, urged by fluid pressure; Isostatic presses
    • B30B11/002—Isostatic press chambers; Press stands therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • B22F3/15—Hot isostatic pressing
    • 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; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/12—Working chambers or casings; Supports therefor

Definitions

  • the present invention relates to a vertical furnace, preferably for isostatic hot-pressing of powder bodies, consisting of a cylindrical pressure chamber comprising a high-pressure cylinder and end closures projecting into this cylinder.
  • the pressure chamber in question is internally heatinsulated by means of a cylindrical insulating wall and end insulating members which are attached to the end closures of the chamber and projecting into the cylindrical wall.
  • the pressure chamber is, in other words, of the type shown in U.S. Pat. No. 3,628,779, in which the seal between the end closures and the high pressure cylinder is effected by sealing rings of hard rubber, for example, or plastic having a high melting point and heat-resistance.
  • the drawing shows a section through a high pressure chamber with end closures l3 and 23 projecting into the tube 10 of the high-pressure cylinder.
  • the insulating mantle 20 is built up in known manner of a number of metal tubes 29, 30 and 31 with intermediate layers 32 and 33 of insulating material and a connection ring 34.
  • the ring 34 is connected to the annular part 21 so that the mantle 20 is suspended in the upper end closure.
  • Between the ring 34 and the part 21 is a seal 36 which is permanent and can be efficiently cooled.
  • the lid 25 consists of a metal dome 37 filled with insulating material, which is connected to the lid 23. Since it must be possible to lift the lid 23 with the insulation 25, there must be a small space between the dome 37 and the tube 31 in the cylindrical insulation and also between the lid 23 and the ring 21. In order to prevent gas flows which penetrate up into this space from being able to heat the lid 23 and thus the seal 24, according to the invention an extra seal 40 is inserted below the seal 24 as shown. This extra seal efficiently stops the gas flows.
  • the seal 40 can be applied in different ways to that shown in the drawing. For example it can be placed on the inside of the ring 34. The main thing is that an efficient barrier obstructs the gas flows in the gap between 37 and 31.
  • Vertical furnace comprising a cylindrical pressure chamber comprising a high-pressure cylinder and end closures projecting into said cylinder, and insulation arranged in the chamber and comprising a cylindrical insulating wall and end insulation members which are attached to the end closures of the chamber and project into the cylindrical insulating wall, and a first seal between the upper end closure and the high-pressure cylinder, the invention which comprises a heatresistant seal below the first seal in the space between the pressure cylinder and the upper end closure projecting into said cylinder to protect the first seal against heat from the inside of the chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Manufacturing & Machinery (AREA)
  • Furnace Details (AREA)
US00228015A 1971-03-12 1972-02-22 Vertical tube furnace for high operating pressure Expired - Lifetime US3743132A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE03170/71A SE361085B (US08088816-20120103-C00036.png) 1971-03-12 1971-03-12

Publications (1)

Publication Number Publication Date
US3743132A true US3743132A (en) 1973-07-03

Family

ID=20261535

Family Applications (1)

Application Number Title Priority Date Filing Date
US00228015A Expired - Lifetime US3743132A (en) 1971-03-12 1972-02-22 Vertical tube furnace for high operating pressure

Country Status (4)

Country Link
US (1) US3743132A (US08088816-20120103-C00036.png)
DE (1) DE2207651A1 (US08088816-20120103-C00036.png)
FR (1) FR2128814B1 (US08088816-20120103-C00036.png)
SE (1) SE361085B (US08088816-20120103-C00036.png)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3790339A (en) * 1972-06-13 1974-02-05 Asea Ab Cylindrical elongated furnace for treating material at high temperature in a gaseous atmosphere under high pressure
US3790340A (en) * 1972-06-13 1974-02-05 Asea Ab Cylindrical elongated furnace for treating material at high temperature in a gaseous atmosphere under high pressure
US4084330A (en) * 1976-07-02 1978-04-18 Fts Systems, Inc. Flask for freeze drying with adjustable seal
US4530441A (en) * 1984-10-02 1985-07-23 Eltech Systems Corporation Readily repairable and lightweight insulating cover for a heated metal container
US4606473A (en) * 1984-10-02 1986-08-19 Eltech Systems Corporation Readily repairable and lightweight insulating cover for a heated metal container
US5176876A (en) * 1990-10-10 1993-01-05 Simko & Sons Industrial Refractories Inc. Insulating ceramic fiber batting module, anchoring system, ladle cover assembly and method of assembly
US5234660A (en) * 1990-10-10 1993-08-10 Simko & Sons Industrial Refractories, Inc. Insulating ceramic fiber batting module, anchoring system, ladle cover assembly and method of assembly
US20180126608A1 (en) * 2016-11-09 2018-05-10 National Formosa University High-temperature hot-pressing molding machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT391104B (de) * 1985-04-01 1990-08-27 Sgp Va Energie Umwelt Dichtsystem fuer ein hochdruckgefaess

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3144035A (en) * 1963-02-01 1964-08-11 Nat Res Corp High vacuum system
US3342469A (en) * 1965-02-08 1967-09-19 Hayes Inc C I Sealing device for high vacuum furnace
US3606286A (en) * 1968-09-18 1971-09-20 Asea Ab Furnace for heat treating objects under high pressure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3144035A (en) * 1963-02-01 1964-08-11 Nat Res Corp High vacuum system
US3342469A (en) * 1965-02-08 1967-09-19 Hayes Inc C I Sealing device for high vacuum furnace
US3606286A (en) * 1968-09-18 1971-09-20 Asea Ab Furnace for heat treating objects under high pressure

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3790339A (en) * 1972-06-13 1974-02-05 Asea Ab Cylindrical elongated furnace for treating material at high temperature in a gaseous atmosphere under high pressure
US3790340A (en) * 1972-06-13 1974-02-05 Asea Ab Cylindrical elongated furnace for treating material at high temperature in a gaseous atmosphere under high pressure
US4084330A (en) * 1976-07-02 1978-04-18 Fts Systems, Inc. Flask for freeze drying with adjustable seal
US4530441A (en) * 1984-10-02 1985-07-23 Eltech Systems Corporation Readily repairable and lightweight insulating cover for a heated metal container
US4606473A (en) * 1984-10-02 1986-08-19 Eltech Systems Corporation Readily repairable and lightweight insulating cover for a heated metal container
US5176876A (en) * 1990-10-10 1993-01-05 Simko & Sons Industrial Refractories Inc. Insulating ceramic fiber batting module, anchoring system, ladle cover assembly and method of assembly
US5234660A (en) * 1990-10-10 1993-08-10 Simko & Sons Industrial Refractories, Inc. Insulating ceramic fiber batting module, anchoring system, ladle cover assembly and method of assembly
US20180126608A1 (en) * 2016-11-09 2018-05-10 National Formosa University High-temperature hot-pressing molding machine
US10625446B2 (en) * 2016-11-09 2020-04-21 National Formosa University High-temperature hot-pressing molding machine

Also Published As

Publication number Publication date
SE361085B (US08088816-20120103-C00036.png) 1973-10-15
FR2128814A1 (US08088816-20120103-C00036.png) 1972-10-20
DE2207651A1 (de) 1972-09-14
FR2128814B1 (US08088816-20120103-C00036.png) 1976-10-29

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