EP2190255B1 - Cartouche de chauffage tubulaire électrique - Google Patents

Cartouche de chauffage tubulaire électrique Download PDF

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Publication number
EP2190255B1
EP2190255B1 EP09013451A EP09013451A EP2190255B1 EP 2190255 B1 EP2190255 B1 EP 2190255B1 EP 09013451 A EP09013451 A EP 09013451A EP 09013451 A EP09013451 A EP 09013451A EP 2190255 B1 EP2190255 B1 EP 2190255B1
Authority
EP
European Patent Office
Prior art keywords
cartridge
helix
tubular
heating
winding
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.)
Active
Application number
EP09013451A
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German (de)
English (en)
Other versions
EP2190255A1 (fr
Inventor
Andreas Schlipf
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.)
Tuerk and Hillinger GmbH
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Tuerk and Hillinger GmbH
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Publication date
Application filed by Tuerk and Hillinger GmbH filed Critical Tuerk and Hillinger GmbH
Publication of EP2190255A1 publication Critical patent/EP2190255A1/fr
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Publication of EP2190255B1 publication Critical patent/EP2190255B1/fr
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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 a flexible electric Rohrrichpatrone to form a cartridge spiral with different pitches and / or for forming a meandering cartridge snake on the circumference of a heated cylindrical tubular body and / or for insertion into contiguous, with different gradients helical grooves extending a metal, tubular hollow body a Rohrwendelpatrone, in particular for metal plastic injection nozzles of injection molding systems, wherein the Rohrrichpatrone is provided with at least one wound on a flexible winding core of insulating Schudrahtheirl which is enclosed in a metal shell of a metal shell filling, compacted insulating material.
  • Pipe radiators of the generic type are known. It is understood in the industry both cylindrical and oval and flattened heating elements with a slightly flexible metal sheath, preferably copper, a copper alloy, nickel, steel or stainless steel, in which at least one Schudrahtlingerl is housed with the front side emerging from the metal sheath electrical connections. In this case, this consisting of a spiral strand or more helical strands Bankdrahtchtl against the metal sheath is electrically isolated in an originally fine-grained and compacted after filling a homogeneous heat conductor Isolierstoffpackung.
  • the metal shells of such Rohrrichpatronen to be light and bendable with a small bending radius, a diameter or a thickness of less than 5 mm.
  • Their usually coreless filament helices can at For high performance design usually have a thickness of 0.2 mm to 0.6 mm. Their pitches are constant over the entire length, which means they have the same heating power at each point. In this case, the slope or the Windungsabplain the Schudrahtchtl to achieve the highest possible heat density, kept as small as possible.
  • an electric tubular heater which has the properties of a tubular heater of the generic type and over its entire length has the same cross-sections with a tube diameter of about 3 mm.
  • This tubular heater is provided with a running in two parallel helical strands
  • Bankdraht Listel electrically isolated in a metal jacket is arranged.
  • the metal shell is closed at one end by a tight metal disc.
  • At the ends of Bankdraht Maisl connecting conductors are fixed, which protrude from the metal plate opposite end of the metal shell end face.
  • the Schudraht Maisl is wound over the entire length with the same pitch or with the same Windungsabpartyn on a over its entire length extending winding core of insulating material, namely on a glass fiber core.
  • the metal shell In the metal shell is a cylindrical ceramic body which almost cross-sectionally fills the cavity of the metal shell and which is held by an insulating granule filling of the closing metal disc at a certain distance. This ceramic body terminates flush with the metal disc opposite end of the metal shell.
  • the Schudraht Maisl is housed with one spiral strand in two axially parallel channels of the ceramic body. The two equally long spiral strands of Schwarzdraht Maisl are substantially shorter than the ceramic body and its channels, so that the connections between the ends of the Schudraht Maisl and the connections are within the channels. In this state, this tube heater is compacted by radial compression under a diameter reduction by a quarter high.
  • the tubular heating cartridge produced in this way is flexible and about 150 cm long. It can be wound into a cartridge coil having a coil diameter of about 25 mm or less and used for heating hot runner tools, injection molding machines or the like.
  • the invention has for its object to provide a Rohrrichpatrone of the type mentioned, with which it is possible over the axial length of a heated metal component, in particular a tubular body or other elongate machine element, such as a Ang fauxdüse an injection molding system on a given Temperature profile to produce adjusted Schutul.
  • a greatly increased heating capacity should be made possible, especially in the sections with higher heat demand, without increasing the heat output in the sections with minimal heat demand.
  • the heater wire coil sections may be arranged with the lowest pitches, while in the lower and lowest power cartridge coil sections, higher pitch and largest heater wire coil sections, respectively Slope or can be arranged with the largest winding distances or be. It is also possible to concentrate the highest heat output on one or more very short lengths of the machine component, for example an injection molding or pouring nozzle. The differently wound sections of the heating wire coil must be generated during the winding process in the respective predetermined lengths.
  • the embodiment of the invention according to claim 2 has advantages, as such a ceramic thread both as a winding core during winding of the heating wire coil as well as during bending and insertion of the heating wire coil in a metal casing pipe is particularly proves favorable.
  • the ceramic thread used here is made up of several very thin, spun or twisted fibers which give it high tensile strength and flexibility.
  • tubular heaters which have only one strand of helix
  • the two led out at the two ends of the metal casing pipe connections can only be brought together at a common location when the Rohrrichpatrone bifilar, ie with two parallel strands of the same Rohrrichpatrone is wound.
  • the hairpin-shaped bent end of the double strand forms the beginning of the heating cartridge spiral.
  • the tubular body 2 of in Fig. 1 Pipe spiral cartridge 1 shown is provided on its circumference with a groove 3 extending groove.
  • This groove 3 is formed doppeltail; ie it consists of two mutually parallel payloads 3/1 and 3/2, which are connected to each other in their initial area by a U-bend 4 and terminate at a remote location 5 of the tube circumference.
  • this groove 3 has a very small pitch with very small pitches w1 .
  • the pitch is so great that this middle section is bridged by only one turn.
  • a Rohrrichpatrone 6 is inserted or pressed in the form of a cartridge coil 12, the electrical connections 7 and 8 are directed at the end of the groove 3 radially outward.
  • a second groove 9, in which a thermocouple 10 is guided, runs parallel to the two-pass groove 3.
  • the tubular body 2 has an outer diameter of about 20 mm to 30 mm.
  • the cross-section of the groove 3 is chosen so that a Rohrrichpatrone 6 can be taken with a thickness of about 2 mm to 5 mm fitting in it.
  • the Rohrrichpatrone 6 in a metal shell 11, arranged concentrically, a Bankdrahtplanetaryl 15 which is wound on a thread, yarn or cord-like winding core 16 made of insulating material.
  • the heating wire coil 15 may have a wire thickness of about 0.1 mm to about 0.8 mm in such applications. Preferably, this about 0.3 mm to 0.7 mm thick winding core 16 made of a ceramic thread or a ceramic cord, which has not only the required tensile strength, but also a sufficient bending elasticity.
  • This winding core 16 is used to provide the Schwarzdrahtplanetaryl 15 during the winding process, ie when generating the Schudrahtplanetaryl 15 with sections of different slopes or winding pitches d1, d2 and d3, ie, with different Windungsêtn.
  • d3 corresponds to a minimum, d2 to a middle and d1 a larger winding distance.
  • the heating wire coil 15 is embedded in a highly compressed insulating material 17, which forms a good heat conductor to the metal shell 11 and at the same time a good electrical insulation against the metal shell 11.
  • Such a tube heating cartridge 6 or cartridge spiral 12 originally produced as a long simple strand is inserted into the double-groove 3 of the green spiral cartridge 1.
  • the tube heater 6 hairpin in a half of their length or U-shaped bend to obtain a sautule shape that can be inserted into the also two-way groove 3 and optionally pressed so that they are the cartridge coil 12 forms.
  • Fig. 2 shows in a schematically simplified 3D representation of a cylindrically wound, coreless cartridge helix 20, the tubular heating cartridge 21 has a flattened cross-section.
  • a Schudrahtplanetaryl 15 laid in two winding strands 23 and 24, which is embedded as usual in a compacted insulating material 17.
  • Fig. 2a and 2b are shown in an enlarged sectional view, the two coil sections IIa and IIb schematically simplified. While in the coil section IIa, the two winding strands 23 and 24 each have a high winding density and a small winding spacing, the same winding strands 23, 24 in the region of the coil portion IIb with a smaller winding density, ie provided with a larger winding spacing. How out Fig. 2 can be seen, the helical section IIa has a smaller pitch than the helical section IIb. Depending on requirements, the remaining coil sections of the cartridge spiral 20 may have different winding densities, with which different heating power densities or heating powers along the cartridge tube coil 20 can be generated. In such a tubular heating element 21, the winding ends of the heating wire coil 15 provided with terminals 28, 29 are located at the same end 26 of the metal shell 22 closed at the other end 27. The cartridge spiral 20 can therefore be wound in a catchy manner.
  • Fig. 4 In the execution according to Fig. 4 is at the closed end 27 of the metal shell 22 U-shaped bent Bankdrahtchtl 15 fixed by guide elements, not shown, within the metal shell in parallel position of the two winding strands.
  • the two winding strands 23, 24 respectively separately in two parallel bores 31 and 32 of several, seamlessly lined up and together over the entire length of the metal shell 22 extending ceramic tube 30 and thus electrically insulated from each other and against the metal shell 22.
  • the Wiendraht Maisl 15 in the holes 31, 32 before filling the Isolierstoffgranulats so much radial clearance that the Schudraht Maisl 15 within these holes 31, 32 can be completely enveloped with the Isolierstoffgranulat and results in compacting an at least almost homogeneous insulating 17.
  • the winding distances d1, d2, d3 , etc. can be selected and executed on the two winding strands 23, 24 different.
  • tubular heating cartridges which have heating wire coils 15 with sectionally different winding densities or winding distances d1, d2, d3, etc., can also be used to produce meandering cartridge coils.
  • Fig. 5 is a schematic 3D representation of a coreless bifilar wound in meandering serpentine lines and shaped into a cylindrically curved cartridge coil 35 tubular heating cartridge 36, which is suitable and intended to be placed on a cylindrical machine part to heat this.
  • Bifilar means that the tubular heating cartridge 36 two equal length, parallel strands 37, 38 forms, which are integrally connected by a preferably provided with a minimum bending radius arc portion 39.
  • This arc portion 39 also forms the beginning of the cartridge snake 35, wherein the end 40 of the two adjacent ends 41 and 42 of the tubular heater 36 is formed.
  • This cartridge snake 35 is lying in a plane, quasi in an extended position shown.
  • This cartridge coil 35 consists of two groups of turns 43 and 44, which are interconnected by a straight cartridge portion 45. It follows that the machine part on which this cartridge snake 35 is placed, in each case more heated in the region of the two winding groups than in the middle section.
  • FIG. 6 shows the Schudrahtheirl 15 in the region of the lower portions A of the straight coil sections 47, 48, 49 and 50 and in the areas of the sheets B and C respectively with a higher winding density, that is provided with smaller pitches d3 than in the remaining sections and in the upper arc regions 39 and 39 ', where the winding pitches are given for example with d2 and d1 .

Landscapes

  • Resistance Heating (AREA)
  • General Induction Heating (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Claims (8)

  1. Cartouche électrique tubulaire chauffante (6, 36) pour constituer une hélice de cartouche (12, 20) ayant des pas différents et/ou pour former un serpentin de tube chauffant (35) ayant un tracé en méandres, sur la périphérie d'un corps tubulaire (2), cylindrique à chauffer et/ou pour être logé dans des rainures (3), hélicoïdales, à pas différents qui sont reliées, et font partie d'un corps creux métallique tubulaire d'une cartouche hélicoïdale tubulaire (1), notamment pour des buses métalliques d'injection de matière plastique dans des systèmes d'injection,
    - la cartouche tubulaire chauffante (6, 36) étant munie d'au moins une hélice de fil chauffant (15) enroulée sur un noyau souple (16) de matière isolante, l'hélice étant entourée par une matière isolante (17), comprimée dans une enveloppe métallique (11, 22) remplie,
    cartouche caractérisée en ce que
    pour avoir des densités de puissance de chauffage différentes, l'hélice de fil chauffant (15) comporte des segments d'hélice de pentes différentes ou avec des écarts de spires différents (d1, d2, d3, etc.) enroulés sur un noyau formé de fil, de cordon ou de cordelette (16) d'un diamètre pratiquement inférieur à 1 mm et cette hélice avec son noyau d'enroulement (16) est intégrée dans une enveloppe métallique (22), dans une garniture d'isolation (17) comprimée avec l'enveloppe métallique (2), cette garniture étant un oxyde métallique, notamment MgO ou analogue, de façon que les segments de l'hélice (15) de fil chauffant ayant les pas les plus petits et les petits intervalles entre les spires (d3) ou avec la puissance de chauffage la plus élevée, constituent les segments (E1, E2) de l'hélice de cartouche (12) ou du serpentin de cartouche (35) ayant les densités de puissance les plus élevées.
  2. Cartouche électrique tubulaire chauffante pour être placée dans des rainures périphériques (3) ayant un tracé hélicoïdal avec des pentes différentes et/ou identiques, reliées, dans le corps tubulaire métallique (2) d'une cartouche de spire tubulaire (1) selon la revendication 1,
    caractérisée en ce que
    les pentes et les intervalles angulaires de l'hélice de fil chauffant (15) dans les zones d'extrémité (E1, E2) du corps tubulaire (2), sont beaucoup plus faibles que dans le segment médian (M) du corps tubulaire (2).
  3. Cartouche électrique tubulaire chauffante selon la revendication 1 ou 2,
    caractérisée en ce que
    le noyau d'enroulement (16) est formé d'un fil de céramique ayant une épaisseur comprise entre 0,1 et 0,7 mm ou est composé d'une cordelette en céramique formée de fibres en céramique.
  4. Cartouche électrique tubulaire chauffante selon la revendication 1 ou 2,
    caractérisée en ce que
    l'hélice de fil chauffant (25) passe dans l'enveloppe métallique (22) suivant deux éléments en forme d'hélices (23, 24) isolés électriquement l'un par rapport à l'autre et qui sont parallèles.
  5. Cartouche électrique tubulaire chauffante selon la revendication 4,
    caractérisée en ce que
    les segments d'hélice avec des intervalles d'enroulement différents (d1, d2, d3) du premier élément (23) sont réalisés différemment et/ou installés différemment des autres segments de l'autre élément (24).
  6. Cartouche électrique tubulaire chauffante selon la revendication 4 ou 5,
    caractérisée en ce qu'
    au moins l'un des deux éléments d'hélice (23, 24) est guidé par de petits tubes de matière isolante, notamment de petits tubes de matière céramique (30).
  7. Cartouche électrique tubulaire chauffante selon la revendication 4 ou 5,
    caractérisée en ce que
    l'enveloppe métallique (22) a une section aplatie.
  8. Cartouche électrique tubulaire chauffante selon l'une quelconque des revendications 1 à 7,
    caractérisée en ce que
    l'hélice de cartouche (20) ne comporte pas de noyau et elle est appuyée suivant un siège ajusté générant une tension radiale sur la périphérie cylindrique d'un corps tubulaire à chauffer, notamment d'une buse d'injection d'un système d'injection.
EP09013451A 2008-11-19 2009-10-24 Cartouche de chauffage tubulaire électrique Active EP2190255B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202008015329U DE202008015329U1 (de) 2008-11-19 2008-11-19 Elektrische Rohrheizpatrone

Publications (2)

Publication Number Publication Date
EP2190255A1 EP2190255A1 (fr) 2010-05-26
EP2190255B1 true EP2190255B1 (fr) 2011-01-19

Family

ID=40299526

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09013451A Active EP2190255B1 (fr) 2008-11-19 2009-10-24 Cartouche de chauffage tubulaire électrique

Country Status (3)

Country Link
EP (1) EP2190255B1 (fr)
AT (1) ATE496514T1 (fr)
DE (2) DE202008015329U1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010002136U1 (de) 2010-02-09 2010-05-20 Türk & Hillinger GmbH Elektrische Heizvorrichtung
WO2013153238A1 (fr) * 2012-04-11 2013-10-17 Jose Rodriguez Rodenas Résistance de cartouche bipartite à connexion au niveau d'une seule extrémité et d'une seule partie
GB201805981D0 (en) * 2018-04-11 2018-05-23 Exheat Industrial Ltd Heating element
DE102018213013A1 (de) * 2018-08-03 2020-02-06 Thermocoax Isopad Gmbh Heizvorrichtung zur Beheizung einer Rohrleitung
CN109999525A (zh) * 2019-04-16 2019-07-12 浙江新锐空分设备有限公司 一种用于氪氙精馏塔的蒸发器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2907870A1 (de) 1979-03-01 1980-09-04 Hotset Heizpatronen U Zubehoer Elektrischer rohrheizkoerper
US5575941A (en) * 1994-08-31 1996-11-19 Johnson; J. Evan Cartridge heater
DE19716010C1 (de) * 1997-04-17 1998-10-29 Tuerk & Hillinger Gmbh Elektrischer Mantelrohrheizkörper mit integriertem Temperaturfühler
DE20212918U1 (de) * 2002-08-22 2002-10-17 Tuerk & Hillinger Gmbh Elektrische Heizeinrichtung für zylindrische Körper
DE202005011686U1 (de) * 2005-07-26 2005-10-06 Türk & Hillinger GmbH Verdichtete Heizpatrone

Also Published As

Publication number Publication date
EP2190255A1 (fr) 2010-05-26
DE502009000324D1 (de) 2011-03-03
ATE496514T1 (de) 2011-02-15
DE202008015329U1 (de) 2009-01-29

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