WO2021054857A1 - Tubular electric heating element assembly - Google Patents
Tubular electric heating element assembly Download PDFInfo
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- 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
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- WIPO (PCT)
- Prior art keywords
- heating element
- tubular electric
- cover
- electric heating
- protective casing
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Classifications
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- 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.
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- Resistance Heating (AREA)
Abstract
The invention relates to nuclear engineering and is intended to provide for heating a coolant and maintaining the pressure in a pressurizer of a reactor when in operation. The invention makes it possible to create a tubular electric heating element assembly in which there is a double metallic barrier between the medium undergoing heating and the conductor of a heater in a tubular electric heating element; an electrically conducting wire spiral is reliably centered inside a protective casing of a tubular electric heating element; the temperature of electrical conductors is reduced; and the tubular electric heating elements are joined to a cover of the tubular electric heating element assembly by a single hermetic welded joint, wherein in a tubular electric heating element assembly comprising a cover and tubular electric heating elements that are hermetically fastened in the cover by means of a welded and soldered joint, the tubular electric heating elements consist of a heating element in the form of a wire spiral, a protective casing in the form of a tube, an insulator, and electrical conductors. It is further proposed to configure a heating element in the form of a heating cable inside a fireproof metallic jacket, which is placed in an outer protective casing made of heat-resistant steel, and to join the outer protective casing and the cover by means of a hermetic welded joint, and to provide the heating element with electrical conductors having a low ohmic resistance, which are configured in the protective fireproof metallic jacket of the heating cable.
Description
БЛОК ТРУБЧАТЫХ ЭЛЕКТРОНАГРЕВАТЕЛЕЙ UNIT OF ELECTRIC TUBE HEATERS
Изобретение относится к электронагревателям, в частности к электронагревателям в системах безопасности ядерных реакторов АЭС (атомных электростанций). The invention relates to electric heaters, in particular to electric heaters in safety systems for nuclear reactors of nuclear power plants (nuclear power plants).
Известен блок трубчатых электронагревателей (далее - БТЭН), «Блок трубчатых электронагревателей» (патент Российской Федерации RU N°50639 F24H, G21C, дата приоритета 25.02.2005, дата публикации 20.01.2006), включающий трубчатые электронагреватели (далее - ТЭН), крышку с резьбовыми отверстиями, защитный кожух со стороны выводов ТЭН, который выполнен из трубы, жестко соединенной с пластиной с отверстиями для выводов ТЭН, которая в свою очередь закреплена на фланце при помощи крепежных элементов, ввернутых в резьбовые отверстия вышеназванной крышки. Known block of tubular electric heaters (hereinafter referred to as BTEN), "Block of tubular electric heaters" (patent of the Russian Federation RU N ° 50639 F24H, G21C, priority date 25.02.2005, publication date 20.01.2006), including tubular electric heaters (hereinafter referred to as TEN), 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.
Основными недостатками такой конструкции БТЭН являются: наличие резьбового соединения контактов ТЭН; маленькая контактная поверхность ТЭН, необходимость приварки контактной пластины к выводу ТЭН; сложность доступа к контактам ТЭН при электромонтаже; возможность перегрева выводов ТЭН при эксплуатации. The main disadvantages of this design of BTEN are: the presence of a threaded connection of the contacts of the heating element; small contact surface of the heating element, the need to weld the contact plate to the output of the heating element; the complexity of access to the contacts of the heating element during electrical installation; the possibility of overheating the terminals of the heating element during operation.
Наиболее близким по технической сущности является устройство «Блок трубчатых электронагревателей», включающее крышку, в которую вварены переходные втулки, трубчатые электронагреватели, которые выполнены на основе проволочной спирали из хромоникелевой проволоки, помещенный в защитный кожух с использованием гигроскопичного материала в качестве электрической изоляции проволочной спирали, причем ТЭН герметично закреплены в крышке посредством сварного и паяного соединения с переходными втулками (ТУ 16-531.745-83, вступили в действие 13.10.1983).
Недостатками данного устройства, принятого за ближайший аналог, являются низкая надежность и маленький срок службы, связанные с конструктивными особенностями ТЭН, а именно: один металлический барьер между обогреваемой средой и токопроводящей жилой нагревателя; применение гигроскопичного материала в качестве электрической изоляции проволочной спирали, приводящее к частому снижению сопротивления электрической изоляции при эксплуатации БТЭН; сложность центровки проволочной спирали в оболочке ТЭН; токопровод, расположенный в зоне высоких температур; необходимость в переходной втулке и трех сварных (паяных) соединений при герметизации ТЭН в крышке БТЭН. 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, taken as the closest analogue, 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.
Указанные недостатки устраняются заявляемым устройством. These disadvantages are eliminated by the claimed device.
Задачей изобретения является повышение надежности БТЭН. The objective of the invention is to improve the reliability of the BTEN.
Техническим результатом настоящего изобретения является создание устройства БТЭН с двойным металлическим барьером между обогреваемой средой и токопроводящей жилой нагревателя ТЭН, гарантированной центровкой проволочной токопроводящей спирали в защитном кожухе ТЭН, низкой температурой токопроводов и одним герметичным сварным соединением ТЭН и крышки БТЭН. 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.
Технический результат достигается тем, что в блоке трубчатых электронагревателей, включающем крышку и трубчатые электронагреватели, которые герметично закреплены в крышке посредством сварного и паяного соединения, причем трубчатые электронагреватели состоят из нагревательного элемента, выполненого в виде проволочной спирали, защитной оболочки в виде трубки, изолятора и токопроводов, предлагается проволочную спираль нагревательного элемента выполнить из нагревательного кабеля в жаростойкой металлической оболочке, которую поместить во внешний защитный кожух из термостойкой стали, причем внешний защитный кожух и крышку соединить герметичным сварным соединением, кроме того, нагревательный элемент снабдить токопроводами с
низким омическим сопротивлением, которые выполнить в защитной жаростойкой металлической оболочке нагревательного кабеля. The technical result is achieved by the fact that in the block of 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, it is proposed to make 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, in addition, 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.
Как вариант, нагревательный элемент трубчатых электронагревателей выполнить в виде бифилярной намотки нагревательного кабеля. Alternatively, the heating element of the tubular electric heaters is made in the form of a bifilar winding of the heating cable.
Как вариант, нагревательный кабель навить на центральный стержень.Alternatively, wind the heating cable around the central rod.
Как вариант, полость внешнего защитного кожуха заполнить теплопроводным материалом. Alternatively, fill the cavity of the outer protective casing with a heat-conducting material.
Как вариант, крышку блока трубчатых электронагревателей со стороны токопроводов закрыть тепловой изоляцией. Alternatively, close the cover of the tubular electric heaters block from the side of the current conductors with thermal insulation.
Как вариант, число установленных в крышке трубчатых электронагревателлей выбирается кратно 3-м. Alternatively, the number of tubular electric heaters installed in the cover is selected in multiples of 3.
Как вариант, токопроводы блока трубчатых электронагревателей оснастить термостойкими герметичными соединителями. Alternatively, equip the conductors of the tubular electric heaters unit with heat-resistant sealed connectors.
Сущность изобретения поясняется чертежами. The essence of the invention is illustrated by drawings.
На фиг.1 изображен общий вид БТЭН (прототипа). Figure 1 shows a general view of BTEN (prototype).
На фиг.2 показано устройство существующего ТЭН (прототипа). Figure 2 shows the device of the existing heating element (prototype).
На фиг.З изображен нагревательный элемент на основе нагревательного кабеля. Fig. 3 shows a heating element based on a heating cable.
На фиг.4 изображен разрез U-образного ТЭН с нагревательным кабелем. Figure 4 shows a section of a U-shaped heating element with a heating cable.
На фиг.5 показан прямой ТЭН с бифилярной намоткой нагревательного кабеля. Figure 5 shows a straight heating element with bifilar winding of the heating cable.
На фиг.6 изображен общий вид БТЭН с прямыми ТЭН с бифилярной намоткой нагревательного кабеля и тепловой изоляцией крышки. 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.
Блок трубчатых электронагревателей 1 включает крышку 2 с втулкой 3 и несколько ТЭН 4 с токопроводами 5. ТЭН выполнены на основе проволочной спирали 6 из хромоникелевой проволоки, помещенный в защитную оболочку 7 в виде трубки, в качестве электрической изоляции используется гигроскопичный материал 8 периклаз MgO. Втулки 3 вварены в
крышку 2. ТЭН 4 и втулки 3 жестко соединены по концам втулок 3 герметичным сварным и паяным соединением. 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.
С целью повышения надежности БТЭН 1 предлагается выполнить ТЭН 4 с нагревательным элементом 9 на основе нагревательного кабеля в жаростойкой металлической оболочке. Нагревательный кабель в жаростойкой металлической оболочке представляет собой тонкостенную металлическую трубку 9 из коррозионно-стойкой жаростойкой стали, в центре которой проходит проволока 10 с высоким омическим сопротивлением, например из сплава Х20Н80 (Cr20Ni80). В качестве изолятора 11 используется, как правило, периклаз MgO. На концах нагревательного элемента 9 в оболочку нагревательного кабеля встроены участки проволоки с низким омическим сопротивлением 12, причем длина этих участков может иметь любую необходимую длину. Нагревательный элемент 9 навивается в виде спирали на центрирующий стержень 13 и помещается в защитный чехол 14 из коррозионно-стойкой жаростойкой стали, например 12Х18Н10Т (до 0,12% углерода, 17-19% хрома, 9-11% никеля, до 1% титана). In order to increase the reliability of BTEN 1, it is proposed to make a heating element 4 with a heating element 9 based on a heating cable in a heat-resistant metal sheath. 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). As an insulator 11, as a rule, MgO periclase is used. At the ends of the heating element 9, 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 ).
Как вариант, ТЭН изготавливают в виде прямого стержня 15, в котором выполняют бифилярную намотку нагревательного элемента 9. Такой вариант позволяет вдвое сократить количество отверстий в крышке 2 БТЭН 1 , а также вдвое сократить количество количество сварных соединений ТЭН 4 с крышкой 2. Как вариант, внутреннюю полость внешнего защитного кожуха (чехла) 14 заполняют теплопроводным материалом 16, например порошковой медью. Как вариант, крышку 2 блока трубчатых электронагревателей 1 со стороны токопроводов 5 закрывают тепловой изоляцией 17. Как вариант, токоподводы 5 блока трубчатых электронагревателей 1 оснащаются термостойкими герметичными соедиителями 18. Alternatively, 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. Alternatively, the inner cavity of the outer protective casing (cover) 14 is filled with a heat-conducting material 16, for example, powdered copper. As an option, the cover 2 of the block of tubular electric heaters 1 from the side of the conductors 5 is closed with thermal insulation 17. Alternatively, the current leads 5 of the unit of tubular electric heaters 1 are equipped with heat-resistant sealed connectors 18.
Предлагаемое устройство БТЭН обеспечивает двойной металлический барьер между обогреваемой средой и токопроводящей жилой 10 ТЭН 4,
гарантированную центровку проволочной токопроводящей спирали 9 в защитном кожухе (чехле) 14 ТЭН 4, снижение температуры токопроводов 12 за счет увеличения их длины, тепловой изоляции крышки и переноса соединителей 18 с питающим кабелем в зону «холодного» воздуха, а также герметизацию ТЭН 4 в крышке 2 одним сварным соединением защитного кожуха (чехла) 14 ТЭН 4 и крышки 2 БТЭН 1. 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.
Таким образом, использование заявляемого технического решения, в сравнении с известными устройствами, обеспечивает повышение надежности устройства блока ТЭН.
Thus, the use of the proposed technical solution, in comparison with known devices, provides an increase in the reliability of the heating element unit.
Claims
1. Блок трубчатых электронагревателей, включающий крышку и трубчатые электронагреватели, котрые герметично закреплены в крышке посредством сварного и паяного соединения, причем трубчатые электронагреватели состоят из нагревательного элемента, выполненного в виде проволочной спирали, защитной оболочки в виде трубки, изолятора и токопроводов, отличающийся тем, что проволочная спираль выполнена из нагревательного кабеля в жаростойкой металлической оболочке, который помещен во внешний защитный кожух из термостойкой стали, причем внешний защитный кожух и крышка соединены герметичным сварным соединением, кроме того, нагевательный элемент снабжен токопроводами с низким омическим сопротивлением, которые выполнены в защитной жаростойкой металлической оболочке нагревательного кабеля. 1. Block of tubular electric heaters, including a 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 current conductors, characterized in that, that the wire spiral is made of 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 are connected by a hermetically sealed welded joint, in addition, the heating element is equipped with current conductors with low ohmic resistance, which are made in a protective heat-resistant metal sheath of the heating cable.
2. Блок по п.1, отличающийся тем, что нагревательный элемент трубчатых электронагревателей выполнен в виде бифилярной намотки нагревательного кабеля. 2. The unit according to claim 1, characterized in that the heating element of the tubular electric heaters is made in the form of a bifilar winding of the heating cable.
3. Блок по п.1, отличающийся тем, нагревательный кабель навит на центрирующий стержень. 3. Block according to claim 1, characterized in that the heating cable is wound on a centering rod.
4. Блок по п.1, отличающийся тем, что полость внешнего защитного кожуха заполнена теплопроводным материалом. 4. Block according to claim 1, characterized in that the cavity of the outer protective casing is filled with a heat-conducting material.
5. Блок по п.1, отличающийся тем, что число установленных в крышке трубчатых электронагревателлей кратно 3-м. 5. Block according to claim 1, characterized in that the number of tubular electric heaters installed in the cover is a multiple of 3.
6. Блок по п.1, отличающийся тем, что крышка со стороны токопроводов закрыта тепловой изоляцией. 6. Block according to claim 1, characterized in that the cover on the side of the current conductors is closed with thermal insulation.
7. Блок по п.1, отличающийся тем, что токопроводы оснащены термостойкими герметичными соединителями.
7. Block according to claim 1, characterized in that the conductors are equipped with heat-resistant sealed connectors.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2019129475A RU2713510C1 (en) | 2019-09-19 | 2019-09-19 | Unit of tubular electric heaters |
| RU2019129475 | 2019-09-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2021054857A1 true WO2021054857A1 (en) | 2021-03-25 |
Family
ID=69624873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/RU2019/001039 WO2021054857A1 (en) | 2019-09-19 | 2019-12-27 | Tubular electric heating element assembly |
Country Status (2)
| Country | Link |
|---|---|
| RU (1) | RU2713510C1 (en) |
| WO (1) | WO2021054857A1 (en) |
Cited By (1)
| 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 |
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| 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 (en) * | 2005-02-25 | 2006-01-20 | Фгуп Окб "Гидропресс" | TUBULAR ELECTRIC HEATERS UNIT |
| RU2568671C1 (en) * | 2014-07-22 | 2015-11-20 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом"-Госкорпорация "Росатом" | Electric heater |
| RU2637490C1 (en) * | 2016-10-28 | 2017-12-05 | Акционерное общество "Ордена Трудового Красного Знамени и ордена труда ЧССР опытное конструкторское бюро "ГИДРОПРЕСС" | Device for electric heating of bath for deactivation |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5247158A (en) * | 1992-07-17 | 1993-09-21 | Watlow Electric Manufacturing Company | Electrical heater |
| DE102007041983A1 (en) * | 2007-09-05 | 2009-03-12 | Ziemek Cable Technology Gmbh | Method for operating an electrical heating arrangement |
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2019
- 2019-09-19 RU RU2019129475A patent/RU2713510C1/en active
- 2019-12-27 WO PCT/RU2019/001039 patent/WO2021054857A1/en active Application Filing
Patent Citations (4)
| 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 (en) * | 2005-02-25 | 2006-01-20 | Фгуп Окб "Гидропресс" | TUBULAR ELECTRIC HEATERS UNIT |
| RU2568671C1 (en) * | 2014-07-22 | 2015-11-20 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом"-Госкорпорация "Росатом" | Electric heater |
| RU2637490C1 (en) * | 2016-10-28 | 2017-12-05 | Акционерное общество "Ордена Трудового Красного Знамени и ордена труда ЧССР опытное конструкторское бюро "ГИДРОПРЕСС" | Device for electric heating of bath for deactivation |
Cited By (2)
| 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 (en) | 2020-02-05 |
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