EP0161994A1 - Tauchsieder und Benutzung in einer Druckkammer - Google Patents

Tauchsieder und Benutzung in einer Druckkammer Download PDF

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Publication number
EP0161994A1
EP0161994A1 EP85400984A EP85400984A EP0161994A1 EP 0161994 A1 EP0161994 A1 EP 0161994A1 EP 85400984 A EP85400984 A EP 85400984A EP 85400984 A EP85400984 A EP 85400984A EP 0161994 A1 EP0161994 A1 EP 0161994A1
Authority
EP
European Patent Office
Prior art keywords
immersion heater
threaded portion
key
intended
flange
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.)
Withdrawn
Application number
EP85400984A
Other languages
English (en)
French (fr)
Inventor
Jean-Pierre Vincent
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.)
Metanic SA
Original Assignee
Metanic SA
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 Metanic SA filed Critical Metanic SA
Publication of EP0161994A1 publication Critical patent/EP0161994A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/78—Heating arrangements specially adapted for immersion heating
    • H05B3/82—Fixedly-mounted immersion heaters

Definitions

  • the present invention relates to fluid heating devices called immersion heaters and relates more particularly to such devices used in sealed pressure vessels.
  • Known immersion heaters are either screw fixing devices or flange fixing devices. There are many kinds of flanges whose objective is to allow to fix a heater tightly and in order to withstand the pressure.
  • the pressure resistance requires the interposition between the seat of the immersion heater and its collar, of seals having a large bearing surface and having to be subjected to a high bearing pressure.
  • the invention aims to remedy the drawbacks stated above of conventional devices by creating an immersion heater which, while having a reduced size is easy to assemble and disassemble, and requires reduced clamping pressure.
  • an immersion heater comprising a body in which elements are mounted heating elements with resistances projecting with respect to one face of said body and connection terminals for said resistors extending from the non-heating part of the elements projecting with respect to the opposite face of said body, the latter comprising on the side of the heating elements a first threaded portion for fixing in a housing intended to receive the immersion heater, and a flange for supporting the body against the end wall of said housing, characterized in that the body also comprises a second threaded portion with a pitch opposite to that of the fixing portion, said second threaded portion being arranged opposite said first portion relative to the flange and being intended to receive a release key for the immersion heater.
  • the invention also relates to a pressure vessel comprising a cylindrical envelope, characterized in that said envelope comprises at least one flat bottom provided with orifices in which are mounted immersion heaters of the type defined above.
  • the immersion heater shown in Fig.1 has a body 1 in which are mounted heating elements 2 shown partially.
  • the heating elements 2 are engaged inside a chamber 3 formed in a wall 4 of an enclosure containing a fluid to be heated using the immersion heater.
  • the non-heating parts 2 ′ of the elements extended by the connection terminals 5 of the heating elements 2 of the immersion heater protrude from the face of the body 1 opposite the heating elements.
  • the body 1 has a first threaded portion 6, the thread of which has, for example, a right pitch. As seen in Fig.1, the threaded portion 6 is engaged by screwing in a complementary tapped portion of the housing 3.
  • the body 1 of the immersion heater further comprises a flange 7 provided opposite the bearing surface 8 of the wall of the enclosure of a groove 9 in which a sealing gasket 10 is engaged.
  • the body 1 also comprises a second threaded portion 11 of pitch opposite to the pitch of the first threaded portion.
  • the thread pitch of the portion 11 is a left-hand pitch.
  • the mounting of the immersion heater which has just been described is particularly simple to carry out. It suffices to engage in the threaded part of the housing 3, the threaded portion 6 of the body 1 and of screwing it into the housing 3 until the flange 7 comes to bear against the wall 8 of the enclosure.
  • the immersion heater can be screwed into its housing using the key 12 shown in Fig.3.
  • This tubular key has a first solid end 13 in which are formed orifices 14 intended to receive the terminals 5 and the non-heating parts 2 ′ of the elements of the immersion heater.
  • the threaded portion 6 of the body 1 of the immersion heater is screwed into the housing 3. Since the blocking force to be exerted on the immersion heater is not significant, the torque exerted by the holes 14 on the parts 2 'is more than enough.
  • the key 12 has at its end opposite to the orifices 13 a tapped portion 15 of left-hand pitch like the second threaded portion 12 of the immersion heater.
  • This threaded portion 15 has an external thread 16 preferably not opposite to the thread 15 on which is mounted a nut 17 with hexagon for example.
  • the nut 17 has a portion 18 slightly projecting from the end of the threaded portion 15 of the key 12.
  • the key 12 has diametrically opposite orifices 19 intended for the introduction of a drive spindle in rotation not shown. To ensure the unscrewing of an immersion heater, the threaded part 15 is screwed onto the threaded portion 11 of the body 1.
  • the immersion heater When the immersion heater is removed from its housing, to remove it from the key 12, it suffices to act on the nut 17 in order to cause the recoil of the part 18 thereof which is in abutment against the flange 7 Then, the threaded portion 11 can be easily unscrewed from the tamped portion 15 of the key.
  • the threaded portion 6 of the body of the immersion heater may include, as shown in FIG. 2, flats 21 able to receive, for example, a flat key.
  • the operating key of the immersion heater can be produced as a variant as shown in Fig. 4.
  • the key shown in this latter figure comprises a tubular body 22 comprising at its end intended to come into engagement with the threaded portion 12 of the immersion heater of the slots 23 and a threaded portion 24 intended to cooperate with said portion 11 of pitch to the left of the immersion heater.
  • the end of the tubular portion 22 has a flared rim 25 with which is intended to cooperate a clamping ring 26 of which a threaded part 27 is engaged on a corresponding threaded part 28 of the tubular body 22.
  • the ring 25 is provided with an annular ramp 29 intended to cooperate with the flared rim 25.
  • the clamping ring 26 When the key of FIG. 4 is engaged on the threaded portion 11 of the immersion heater, the clamping ring 26 is engaged by its end ramp 29 on the flared rim 25 of the slotted end of the tubular body 22 of so that the threaded portion 24 can be screwed in normally. After removing the immersion heater, it suffices to disengage the latter from the key 22 to unscrew the clamping ring 26, thereby causing the jaws formed by the portions of the tubular body 22 defined by the slots 23 to be released.
  • the immersion heater which has just been described has the following advantages over conventional immersion heaters. Its support flange no longer having a hexagon shape, its size is made minimum, which allows to have a maximum of power in a given space.
  • a seal with low contact pressure and of reduced size for example an elastomer O-ring, a quadring seal, an MS ring or the like, makes it possible to reduce the constraints of fixing the immersion heaters in their support plate.
  • the immersion heaters according to the invention can undergo maintenance when they are changed after a large number of operating hours during which the oxidation of the threads or the incrustation of scale deposits makes the disassembly torque very high.
  • Fig. 5 shows a pressure vessel provided with immersion heaters of the type described with reference in Fig.1 and 2.
  • This enclosure has a cylindrical casing 30, the convex bottom 31 of which is provided with an inlet 32 for a fluid and with a connection piece 33 with accessories.
  • An outlet 34 is provided at the upper part of the lateral surface of the envelope while a drain pipe 35 is provided at its lower part.
  • the casing 30 is closed by a flat bottom 36 provided with a large number of tapped holes 37 into which are immersed immersion heaters 38 of the type described with reference to Fig.1 and 2.
  • the bottom 36 is fixed to the envelope by sampling.
  • the immersion heaters 37 occupy very close relative positions, which, as already indicated above, makes it possible to obtain increased power in a given size.
  • the enclosure described with reference to Figs. 5 and 6 is intended to constitute an electric boiler for the production of superheated steam or water or for the reheating of any fluid in circulation.
  • such an enclosure may have two flat bottoms.

Landscapes

  • Resistance Heating (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
EP85400984A 1984-05-18 1985-05-20 Tauchsieder und Benutzung in einer Druckkammer Withdrawn EP0161994A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8407807A FR2564680B1 (fr) 1984-05-18 1984-05-18 Thermoplongeur perfectionne et enceinte sous pression en comportant application
FR8407807 1984-05-18

Publications (1)

Publication Number Publication Date
EP0161994A1 true EP0161994A1 (de) 1985-11-21

Family

ID=9304168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85400984A Withdrawn EP0161994A1 (de) 1984-05-18 1985-05-20 Tauchsieder und Benutzung in einer Druckkammer

Country Status (2)

Country Link
EP (1) EP0161994A1 (de)
FR (1) FR2564680B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4106985C1 (en) * 1991-03-05 1992-05-07 Friedrich 7180 Crailsheim De Mueller Electric heating element for hot water tank - has base supporting heating rods with increasing relative spacing in direction of free ends

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1580325A (de) * 1968-05-20 1969-09-05
FR2230143A1 (en) * 1973-05-17 1974-12-13 Raquin Pierre Immersion heaters mounting assembly has tubular heating element - held in threaded tube by locking cap to facilitate replacement
US4253009A (en) * 1979-04-02 1981-02-24 Jordan Chalmer C Heating element for water heater
EP0041014A1 (de) * 1980-05-27 1981-12-02 COMMISSARIAT A L'ENERGIE ATOMIQUE Etablissement de Caractère Scientifique Technique et Industriel Befestigungsanordnung für ein Führungsrohr eines Brennelementenbündels auf die Endplatten dieses Bündels

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1580325A (de) * 1968-05-20 1969-09-05
FR2230143A1 (en) * 1973-05-17 1974-12-13 Raquin Pierre Immersion heaters mounting assembly has tubular heating element - held in threaded tube by locking cap to facilitate replacement
US4253009A (en) * 1979-04-02 1981-02-24 Jordan Chalmer C Heating element for water heater
EP0041014A1 (de) * 1980-05-27 1981-12-02 COMMISSARIAT A L'ENERGIE ATOMIQUE Etablissement de Caractère Scientifique Technique et Industriel Befestigungsanordnung für ein Führungsrohr eines Brennelementenbündels auf die Endplatten dieses Bündels

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4106985C1 (en) * 1991-03-05 1992-05-07 Friedrich 7180 Crailsheim De Mueller Electric heating element for hot water tank - has base supporting heating rods with increasing relative spacing in direction of free ends

Also Published As

Publication number Publication date
FR2564680A1 (fr) 1985-11-22
FR2564680B1 (fr) 1986-10-17

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE CH DE GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19860217

17Q First examination report despatched

Effective date: 19871013

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19880416

RIN1 Information on inventor provided before grant (corrected)

Inventor name: VINCENT, JEAN-PIERRE