WO2021054857A1 - Ensemble d'éléments chauffants électriques tubulaires (eecet) - Google Patents

Ensemble d'éléments chauffants électriques tubulaires (eecet) Download PDF

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Publication number
WO2021054857A1
WO2021054857A1 PCT/RU2019/001039 RU2019001039W WO2021054857A1 WO 2021054857 A1 WO2021054857 A1 WO 2021054857A1 RU 2019001039 W RU2019001039 W RU 2019001039W WO 2021054857 A1 WO2021054857 A1 WO 2021054857A1
Authority
WO
WIPO (PCT)
Prior art keywords
heating element
tubular electric
cover
electric heating
protective casing
Prior art date
Application number
PCT/RU2019/001039
Other languages
English (en)
Russian (ru)
Inventor
Виктор Алексеевич ГАВРИЛИН
Максим Викторович ГОРЕЛКИН
Original Assignee
Акционерное Общество "Ордена Трудового Красного Знамени И Ордена Труда Чсср Опытное Kohcтруктоpckoe Бюро "Гидропресс" (Ао Окб Чсср "Гидропресс")
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 Акционерное Общество "Ордена Трудового Красного Знамени И Ордена Труда Чсср Опытное Kohcтруктоpckoe Бюро "Гидропресс" (Ао Окб Чсср "Гидропресс") filed Critical Акционерное Общество "Ордена Трудового Красного Знамени И Ордена Труда Чсср Опытное Kohcтруктоpckoe Бюро "Гидропресс" (Ао Окб Чсср "Гидропресс")
Publication of WO2021054857A1 publication Critical patent/WO2021054857A1/fr

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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
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material

Definitions

  • the invention relates to electric heaters, in particular to electric heaters in safety systems for nuclear reactors of nuclear power plants (nuclear power plants).
  • BTEN block of tubular electric heaters
  • BTEN block of tubular electric heaters
  • TEN tubular electric heaters
  • cover with threaded holes cover with threaded holes
  • a protective casing on the side of the heating element terminals which is made of a pipe rigidly connected to a plate with holes for the heating element terminals, which in turn is fixed to the flange using fasteners screwed into the threaded holes of the above-named cover.
  • the closest in technical essence is the device “Block of tubular electric heaters”, which includes a cover into which transition sleeves are welded, tubular electric heaters, which are made on the basis of a wire spiral made of chromium-nickel wire, placed in a protective casing using hygroscopic material as electrical insulation of the wire spiral, moreover, the heating elements are hermetically fixed in the cover by means of a welded and soldered connection with adapter sleeves (TU 16-531.745-83, entered into force on 13.10.1983).
  • the disadvantages of this device are low reliability and short service life associated with the design features of the heating element, namely: one metal barrier between the heated medium and the conductive core of the heater; the use of hygroscopic material as the electrical insulation of the wire spiral, leading to a frequent decrease in the electrical insulation resistance during the operation of the BTEN; the complexity of centering the wire spiral in the heating element sheath; a conductor located in a high temperature zone; the need for an adapter sleeve and three welded (soldered) joints when sealing the heating element in the BTEN cover.
  • the objective of the invention is to improve the reliability of the BTEN.
  • the technical result of the present invention is the creation of a BTEN device with a double metal barrier between the heated medium and the conductive core of the heater of the heater, guaranteed by the alignment of the wire conductive spiral in the protective casing of the heater, a low temperature of the conductors and one sealed welded joint of the heater and the BTEN cover.
  • the tubular electric heaters including the lid and tubular electric heaters, which are hermetically fixed in the lid by means of a welded and soldered joint, and the tubular electric heaters consist of a heating element made in the form of a wire spiral, a protective shell in the form of a tube, an insulator and conductors
  • the wire spiral of the heating element from a heating cable in a heat-resistant metal sheath, which is placed in an outer protective casing made of heat-resistant steel, and the outer protective casing and the cover should be connected with a hermetically welded joint
  • the heating element should be equipped with current conductors with low ohmic resistance, which are made in a protective heat-resistant metal sheath of the heating cable.
  • the heating element of the tubular electric heaters is made in the form of a bifilar winding of the heating cable.
  • close the cover of the tubular electric heaters block from the side of the current conductors with thermal insulation.
  • the number of tubular electric heaters installed in the cover is selected in multiples of 3.
  • Figure 1 shows a general view of BTEN (prototype).
  • Figure 2 shows the device of the existing heating element (prototype).
  • Fig. 3 shows a heating element based on a heating cable.
  • Figure 4 shows a section of a U-shaped heating element with a heating cable.
  • Figure 5 shows a straight heating element with bifilar winding of the heating cable.
  • Figure 6 shows a general view of an electric heating element with straight heating elements with bifilar winding of the heating cable and thermal insulation of the cover.
  • the block of tubular electric heaters 1 includes a cover 2 with a sleeve 3 and several heating elements 4 with current leads 5.
  • the heating elements are made on the basis of a wire spiral 6 made of chromium-nickel wire, placed in a protective shell 7 in the form of a tube; hygroscopic material 8 is used as electrical insulation periclase MgO.
  • Bushings 3 are welded into cover 2. TEN 4 and bushings 3 are rigidly connected at the ends of bushings 3 by a hermetically sealed welded and soldered joint.
  • a heating cable in a heat-resistant metal sheath is a thin-walled metal tube 9 made of corrosion-resistant heat-resistant steel, in the center of which there is a wire 10 with high ohmic resistance, for example, from alloy X20N80 (Cr20Ni80).
  • a wire 10 with high ohmic resistance for example, from alloy X20N80 (Cr20Ni80).
  • alloy X20N80 alloy X20N80 (Cr20Ni80).
  • MgO periclase is used.
  • wire sections with low ohmic resistance 12 are embedded in the sheath of the heating cable, and the length of these sections can be of any desired length.
  • Heating element 9 is wound in the form of a spiral onto a centering rod 13 and placed in a protective cover 14 made of corrosion-resistant heat-resistant steel, for example 12X18H10T (up to 0.12% carbon, 17-19% chromium, 9-11% nickel, up to 1% titanium ).
  • the heating element is made in the form of a straight rod 15, in which the bifilar winding of the heating element 9 is performed.
  • This option allows to halve the number of holes in the cover 2 of the BTEN 1, and also halve the number of welded joints of the heating element 4 with the cover 2.
  • the inner cavity of the outer protective casing (cover) 14 is filled with a heat-conducting material 16, for example, powdered copper.
  • the cover 2 of the block of tubular electric heaters 1 from the side of the conductors 5 is closed with thermal insulation 17.
  • the current leads 5 of the unit of tubular electric heaters 1 are equipped with heat-resistant sealed connectors 18.
  • the proposed BTEN device provides a double metal barrier between the heated medium and the conductive core 10 of the heating element 4, guaranteed alignment of the wire conductive spiral 9 in the protective casing (case) 14 TEN 4, lowering the temperature of the conductors 12 by increasing their length, thermal insulation of the cover and transfer of the connectors 18 with the supply cable to the "cold" air zone, as well as sealing the TEN 4 in the cover 2 with one welded joint of the protective casing (cover) 14 TEN 4 and cover 2 BTEN 1.

Landscapes

  • Resistance Heating (AREA)

Abstract

L'invention se rapporte au domaine de l'énergie nucléaire et a pour but d'assurer le chauffage d'un caloporteur et de maintenir la pression dans un compensateur de pression d'un réacteur au cours de l'exploitation. L'invention permet de créer un dispositif EECET possédant une double barrière métallique entre le milieu à chauffer et le conducteur de courant de l'élément chauffant du ECET, un centrage garanti de la spirale de fibres conductrices de courant dans le capot de protection du ECET, une diminution de la température des conducteurs de courant et une connexion par soudure hermétique unique du ECET et du couvercle de l'EECET; l'ensemble d'éléments chauffants électriques tubulaires comprend un couvercle et des éléments chauffants électrique tubulaires qui sont connectés hermétiquement dans le couvercle par une connexion soudée ou brasée; les éléments chauffants électriques tubulaires se composent d'un élément chauffant se présentant sous forme d'une spirale de fibres, d'une enveloppe de protection en forme de tube, d'un isolateur et de conducteurs de courant; il est préférable que l'élément chauffant se composant d'un câble chauffant dans une enveloppe métallique à l'épreuve de la chaleur et disposé dans un capot de protection externe fait d'un acier résistant à la chaleur; le capot de protection externe et le couvercle sont connectés par une connexion soudée hermétique, et l'élément chauffant consiste en des conducteurs de courant ayant une faible résistance ohmique et faits d'une enveloppe métallique de protection à l'épreuve de la chaleur du câble chauffant.
PCT/RU2019/001039 2019-09-19 2019-12-27 Ensemble d'éléments chauffants électriques tubulaires (eecet) WO2021054857A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2019129475A RU2713510C1 (ru) 2019-09-19 2019-09-19 Блок трубчатых электронагревателей
RU2019129475 2019-09-19

Publications (1)

Publication Number Publication Date
WO2021054857A1 true WO2021054857A1 (fr) 2021-03-25

Family

ID=69624873

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2019/001039 WO2021054857A1 (fr) 2019-09-19 2019-12-27 Ensemble d'éléments chauffants électriques tubulaires (eecet)

Country Status (2)

Country Link
RU (1) RU2713510C1 (fr)
WO (1) WO2021054857A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210112634A1 (en) * 2019-10-15 2021-04-15 Türk & Hillinger GmbH Electric tubular heating element and related method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2962683A (en) * 1957-10-18 1960-11-29 Gen Electric Electric heating units and methods of making the same
RU50639U1 (ru) * 2005-02-25 2006-01-20 Фгуп Окб "Гидропресс" Блок трубчатых электронагревателей
RU2568671C1 (ru) * 2014-07-22 2015-11-20 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом"-Госкорпорация "Росатом" Электрический нагреватель
RU2637490C1 (ru) * 2016-10-28 2017-12-05 Акционерное общество "Ордена Трудового Красного Знамени и ордена труда ЧССР опытное конструкторское бюро "ГИДРОПРЕСС" Устройство электрообогрева ванны для дезактивации

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5247158A (en) * 1992-07-17 1993-09-21 Watlow Electric Manufacturing Company Electrical heater
DE102007041983A1 (de) * 2007-09-05 2009-03-12 Ziemek Cable Technology Gmbh Verfahren zum Betreiben einer elektrischen Heizanordnung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2962683A (en) * 1957-10-18 1960-11-29 Gen Electric Electric heating units and methods of making the same
RU50639U1 (ru) * 2005-02-25 2006-01-20 Фгуп Окб "Гидропресс" Блок трубчатых электронагревателей
RU2568671C1 (ru) * 2014-07-22 2015-11-20 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом"-Госкорпорация "Росатом" Электрический нагреватель
RU2637490C1 (ru) * 2016-10-28 2017-12-05 Акционерное общество "Ордена Трудового Красного Знамени и ордена труда ЧССР опытное конструкторское бюро "ГИДРОПРЕСС" Устройство электрообогрева ванны для дезактивации

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210112634A1 (en) * 2019-10-15 2021-04-15 Türk & Hillinger GmbH Electric tubular heating element and related method
US11895744B2 (en) * 2019-10-15 2024-02-06 Türk & Hillinger GmbH Electric tubular heating element and related method

Also Published As

Publication number Publication date
RU2713510C1 (ru) 2020-02-05

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