EP0056834B1 - Procédé de fabrication d'un module comprenant un élément chauffant tubulaire - Google Patents

Procédé de fabrication d'un module comprenant un élément chauffant tubulaire Download PDF

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Publication number
EP0056834B1
EP0056834B1 EP81102911A EP81102911A EP0056834B1 EP 0056834 B1 EP0056834 B1 EP 0056834B1 EP 81102911 A EP81102911 A EP 81102911A EP 81102911 A EP81102911 A EP 81102911A EP 0056834 B1 EP0056834 B1 EP 0056834B1
Authority
EP
European Patent Office
Prior art keywords
tubular
fixing plate
tubular heater
holes
annular space
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
Application number
EP81102911A
Other languages
German (de)
English (en)
Other versions
EP0056834A2 (fr
EP0056834A3 (en
Inventor
Ingo Dipl.-Ing. Dr. Mont. Bleckmann
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.)
ELPAG AG CHUR
Original Assignee
ELPAG AG CHUR
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6123133&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0056834(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ELPAG AG CHUR filed Critical ELPAG AG CHUR
Priority to AT81102911T priority Critical patent/ATE15742T1/de
Publication of EP0056834A2 publication Critical patent/EP0056834A2/fr
Publication of EP0056834A3 publication Critical patent/EP0056834A3/de
Application granted granted Critical
Publication of EP0056834B1 publication Critical patent/EP0056834B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/162—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by using bonding or sealing substances, e.g. adhesives
    • 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
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders
    • 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 method for producing a tubular heater installation unit, in which the tubular heater ends are sealingly connected with a fastening plate provided with corresponding holes so that the connecting ends of the tubular heater are on the outside of the plate and the tubular heater itself is on the inside of the plate, and a Tubular radiator installation unit manufactured according to the method.
  • Tubular heaters generally consist of a jacket tube, e.g. made of chrome-nickel steel, one in an insulating compound, generally magnesium oxide, embedded heating coil and from the connecting parts.
  • the latter are generally connection bolts to which one end of the heating coil is welded.
  • the connecting bolts are passed through an insulating bead or another insulating body which sits in the end section of the casing tube.
  • the jacket tube is now closed at its ends by means of an adhesive which, after curing, on the one hand protects the insulating material, that is to say the magnesium oxide, against ingress of moisture and, on the other hand, improves the mechanical retention of the connecting bolt in the associated end of the jacket tube.
  • Tubular heating elements in the form of a hairpin or a W-shape are inserted through holes in a fastening plate in the case of a more extensive construction, in which case the ends of the casing tube generally protrude 8 to 12 mm beyond the surface of the fastening plate facing the connecting bolts.
  • the feedthrough through the mounting plate must be absolutely watertight.
  • the fixing and sealing of the tubular heater ends in the holes of the mounting plate is generally done by soldering. This work is relatively expensive and cumbersome considering the fact that tubular radiator installation units are mass-produced items with extremely low prices. Despite the greatest care, a relatively large committee cannot be avoided.
  • a sealing body made of elastic material and a counter flange plate which can move on the tubular heating element leg can be applied before or after attaching the fastening plate.
  • the mounting plate or the counter flange plate carries a screw bolt.
  • the sealing body is pressed together by tightening a corresponding nut and is generally pressed against the edges of a container wall opening.
  • the fastening plate covering the container wall opening is screwed onto the container with the interposition of a sealing ring.
  • the tubular radiator installation units produced in this way can have different designs.
  • the invention is applicable to all constructions in which the tubular heater ends are passed through holes in a fastening plate and are fixed in a sealing manner therein.
  • the soldering must be done from the outside, i.e. the ring-shaped solder joint is located on the lower side of the flange plate which later turns towards the inside of the container and extends in a ring around the outside of the tubular heating element jacket.
  • insulating material e.g. Magnesium oxide
  • a plate e.g. become known for the production of heat exchangers. Since the pipes are unfilled, i.e. hollow, in contrast to tubular heaters, in which the pipes are filled with the heating coil and insulating material and in which the connecting bolts protrude beyond the pipe end, the conical end of a welding electrode can penetrate into the open pipe end. By means of a counterelectrode pressed against the underside of the plate, the tube end projecting beyond the plate is welded off. The flowing material connects to the plate, so that a correspondingly durable and tight weld connection can be made.
  • capacitor welding is known, for example, from DE-A-2 218 143.
  • a capacitor bank is charged with direct current.
  • the stored energy is for welding over the workpieces to be welded together.
  • the invention is based on the object of simplifying the manufacture of tubular heater installation units by improving the sealing of the tubular heater ends in the holes in the fastening plate, with a reject being almost completely avoided.
  • a hairpin-shaped tubular heater 1 consists of a casing tube 2 and a filling of insulating material, e.g. Made of magnesium oxide 4.
  • the heating coil 3 is welded or soldered to a connecting bolt 5.
  • the magnesium oxide filling 4 ends at a distance from the end edge 6 of the casing tube 2, so that an annular space 7 remains for receiving the end seal.
  • the annular space 7 is not closed in the new method. Rather, as shown in FIG. 1, the tubular heater ends are inserted through associated holes 8 in a fastening plate 9 such that the end edge 6 protrudes somewhat beyond the outside of the fastening plate 9.
  • the fastening plate 9 preferably has a depression 10 in the region of the holes 8.
  • a welding electrode 11 of a capacitor welding device (not shown in detail) has a conical end 12, the smallest diameter at the cone end being smaller than the inside diameter of the jacket tube 2 and the diameter of the cone widening beyond the dimension of the outside diameter of the jacket tube 2.
  • the welding electrode 11 is hollow, as indicated at 13 in FIG. 2, so that it can receive the connecting bolt 5.
  • the welding electrode is now inserted into the open end of the tubular heating element as shown in FIG. 2, the end edge 6 being flanged out, as shown in FIG. 3.
  • the end edge 6 is welded to the edges of the hole 8.
  • a durable fixation is essential. Practice has shown, however, that both the fixation and the sealing are entirely satisfactory with the proposed method.
  • the annular space 7 is filled with an adhesive, as shown in FIG.
  • the entire recess 10 is filled with the adhesive. This creates the possibility of extensive automation. So while in known methods it was necessary to ensure that as far as possible no adhesive gets onto the outer wall of the tubular heater, since the adhesive residues adhering made it difficult to insert into the holes in the mounting plate, the application of the adhesive is much less problematic in the described method.
  • the adhesive therefore fulfills two different functions, namely that on the one hand the end of the tubular heating element is protected against the ingress of moisture, and on the other hand the passage of the casing tubes 2 of the tubular heating element 1 is sealed by the holes 8 of the fastening plate 9.
  • the magnesium oxide layer 4 can be protected against welding by means of an intermediate layer. It is only essential that an intermediate space remains, into which the welding electrode 11 can penetrate. Furthermore, insulating beads or similar connection elements can be used in the usual way.
  • the welding process can be varied accordingly.
  • the casing tube 2 of the tubular heater can have a larger diameter than the hole 8, the end edges 6 then being drawn in to the hole diameter.
  • the end edge 6 can be butt-welded to the underside of the mounting plate 9.
  • the hole 8 can be expressed conically downwards while the end edge 6 of the tubular casing 2 is flared. The welding then takes place over the conical inclined surfaces.
  • the tubular heater ends can be welded individually in the assigned holes. However, a plurality of welding electrodes 11 can also be used, which simultaneously weld the tubular heater ends in the assigned holes 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)
  • Pipe Accessories (AREA)

Claims (2)

1. Procède pour fabriquer une unité incorporable d'élément chauffant tubulaire, dans lequel les extrémités de l'élément chauffant tubulaire sont reliées de façon étanche à une plaque de fixation (9) munie de trous (8) correspondants, en sorte que les extrémités de raccordement de l'élément chauffant tubulaire (1) se trouvent sur le côté extérieur de la plaque de fixation (9) et l'élément chauffant tubulaire (1) lui-même se trouve sur le côte intérieur de la plaque de fixation (9), caractérisé par la combinaison des stades de procédé suivants connus en soi;
a) les extrémités de l'élément chauffant tubulaire, qui comportent chacune un espace annulaire (7) entre la broche de connexion (5) et la surface intérieur de l'enveloppe tubulaire (2), sont enfilées dans les trous (8) correspondants de la plaque de fixation (9) de telle sorte que les bords frontaux (6) de l'enveloppe tubulaire (2) dépassent légèrement au-delà du côté exterieur de la plaque de fixation (9);
b) l'électrode de soudage (11) qui comporte un alésage central (13) pour recevoir la broche de connexion (5), est introduite dans l'espace annulaire (7), et le bord frontal (6) est repoussé au-dessus du bord du trou et est soudé avec la plaque de fixation (9);
c) après avoir sorti l'électrode de soudage conique (11), on ferme l'espace annulaire (7) avec un bouchon de colle (14) qui recouvre également les bords frontaux rabattus (6) de l'enveloppe tubulaire (2) et les rend étanches, de sorte que des emplacements non étanches subsistant lors du soudage de l'élément chauffant tubulaire (1) dans les trous (8) sont fermés par la colle (14).
2. Procédé selon la revendication 1, caractérisé en ce que le soudage de l'enveloppe tubulaire (2) dans le trou (8) correspondant est effectué au moyen d'une soudure par condensateurs.
EP81102911A 1981-01-22 1981-04-15 Procédé de fabrication d'un module comprenant un élément chauffant tubulaire Expired EP0056834B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81102911T ATE15742T1 (de) 1981-01-22 1981-04-15 Verfahren zur herstellung einer rohrheizkoerpereinbaueinheit.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813102028 DE3102028A1 (de) 1981-01-22 1981-01-22 "verfahren zur herstellung einer rohrheizkoerpereinbaueinheit"
DE3102028 1981-01-22

Publications (3)

Publication Number Publication Date
EP0056834A2 EP0056834A2 (fr) 1982-08-04
EP0056834A3 EP0056834A3 (en) 1982-08-11
EP0056834B1 true EP0056834B1 (fr) 1985-09-18

Family

ID=6123133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81102911A Expired EP0056834B1 (fr) 1981-01-22 1981-04-15 Procédé de fabrication d'un module comprenant un élément chauffant tubulaire

Country Status (3)

Country Link
EP (1) EP0056834B1 (fr)
AT (1) ATE15742T1 (fr)
DE (2) DE3102028A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101674687B (zh) * 2008-09-08 2012-11-21 崔成哲 内膜管状电发热装置及其生产方法
CN105485692B (zh) * 2015-03-12 2017-11-21 无锡华光锅炉股份有限公司 一种省煤器管屏间烟气挡板装置
CN209497616U (zh) * 2018-09-21 2019-10-15 厦门科牧智能技术有限公司 陶瓷加热器
CN109986267B (zh) * 2019-04-04 2021-04-20 安徽苏立科技股份有限公司 一种保证电热管垂直度的焊接工装

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2614198A (en) * 1950-12-13 1952-10-14 Austin Motor Co Ltd Heat exchanger
US2860227A (en) * 1957-06-11 1958-11-11 Westinghouse Electric Corp Electrical heating apparatus
DE1615302A1 (de) * 1967-03-17 1970-05-21 Wilhelm Hilzinger Fa Vorrichtung zum Abdichten eines Endes eines Rohres,insbesondere eines Heizrohres
DE2218143B2 (de) * 1972-04-14 1974-09-05 Nelson Bolzenschweiss-Technik Gmbh, 5820 Gevelsberg Elektrische Kondensator-Batterie als Stromquelle, insbesondere für das elektrische Schweißen, Löten oder Erwärmen mittels Kondensatorenentladung
FR2264620B1 (fr) * 1974-03-19 1976-12-17 Chausson Usines Sa

Also Published As

Publication number Publication date
DE3102028A1 (de) 1982-09-02
ATE15742T1 (de) 1985-10-15
EP0056834A2 (fr) 1982-08-04
EP0056834A3 (en) 1982-08-11
DE3172297D1 (en) 1985-10-24

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