EP0014485B1 - Brenner für Weichenheizvorrichtung - Google Patents

Brenner für Weichenheizvorrichtung Download PDF

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Publication number
EP0014485B1
EP0014485B1 EP19800200021 EP80200021A EP0014485B1 EP 0014485 B1 EP0014485 B1 EP 0014485B1 EP 19800200021 EP19800200021 EP 19800200021 EP 80200021 A EP80200021 A EP 80200021A EP 0014485 B1 EP0014485 B1 EP 0014485B1
Authority
EP
European Patent Office
Prior art keywords
burner
gauze
holder
gas
combustion
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
EP19800200021
Other languages
English (en)
French (fr)
Other versions
EP0014485A1 (de
Inventor
Cornelis Gerhardus Reijerkerk
Hans Robert Waldmeier
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.)
Aben Apparaten- en Machinefabriek BV
Original Assignee
Aben Apparaten- en Machinefabriek BV
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=26645495&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0014485(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from NL7901084A external-priority patent/NL7901084A/nl
Application filed by Aben Apparaten- en Machinefabriek BV filed Critical Aben Apparaten- en Machinefabriek BV
Publication of EP0014485A1 publication Critical patent/EP0014485A1/de
Application granted granted Critical
Publication of EP0014485B1 publication Critical patent/EP0014485B1/de
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B7/00—Switches; Crossings
    • E01B7/24—Heating of switches

Definitions

  • the invention relates to a burner for a railway points-heater comprising a burner housing and at least one burner body arranged in said housing and having passages, in which the combustion of a gas-air mixture takes place.
  • Such a burner is known from DE-B 1,111,661.
  • the burner consists of a burner stone.
  • the combustion channels have such a width that the gas/air mixture passing through the the combustion channels already ignites in the combustion channels.
  • This burner stone requires a long heating-up time until it reaches such a degree of heat that ignition can take place in the burner stone. During this heating-up time the flame may be extinguished by a gust of wind.
  • the burner stone can be rendered suitable for all kinds of gas only with difficulty.
  • the burner stone has, in particular, the disadvantage that it can be made only with difficulty and is likely to break down due to vibrations.
  • the invention provides a burner of the kind set forth in the preamble, in which the risk of extinction of the flame, even a short time after ignition, is avoided, and which as regards a flash-over of the flame to the gas-air mixture feed is absolutely safe, even in the event of appreciable variations in the gas-to-air ratio, in the chemical composition of the gas and/or the output of delivered heat, said burner being readily manufacturable and being capable of withstanding vibrations, since the burner body mainly consists of one extinction gauze and at least three and preferably more than three glowing gauze layers, said extinction gauze and said glowing gauze layers succeeding one another in the direction of flow, inside which the combustion takes place, said glowing gauze layers being arranged near one another and constituting together a glow body, comprising sufficiently heated material to keep the temperature of the burner body above the ignition temperature during some time after the flame has been blown out.
  • US-A-2 815 747 discloses a railroad switch-heater having an oil burner comprising wicks inserted in a U-shaped screen. The combustion takes place outside of the end of the wicks and thus outside of the U-shaped screen.
  • FR-A 2 292 928 discloses an infra-red burner having a burner body built up from a packet 15 of at least two adjoining gauze layers 15a and 15b and another gauze layer 23 positioned remote thereof. That gauze layer 15b of said at least two adjoining gauze layers 15a and 15b facing the gas inlet should be considered to constitute an extinction gauze layer 15b always remaining below the ignition temperature. This means that the other 15a of said at least two adjoining gauze layers 15a and 15b could be heated above the ignition temperature when the burner is in operation.
  • this other gauze layer 15a remains relatively low, as the combustion takes place partly outside of this thin packet of gauze layers, although this FR-A-2 292 928 states, that the combustion occurs within the spaces between the gauze elements of this packet 15. It is believed that in reality the combustion occurs for a great deal in the free space between the packet 15 and the outer gauze layer 23. In order to catch the heat due to combustion in this free space, the outer layer 23 is required, which outer layer is called a backwards radiating grill, indicating its function, which would be superfluous in case the combustion would occur within the packet 1 5.
  • This known burner is not proposed for use in a railway switch-heater and would not be useful at railroad switches, as the flame would already be definitively extinguished by little wind, due to the facts
  • FR-A-1 439 978 discloses a burner with a radiating element, consisting of a metal plate, a grid, a ceramic plate or a combination of grids with ceramic plates.
  • Page 1, column 2, line 7 describes that the combustion takes place at the surface of the radiating element.
  • US-A-3 304 985 describes a burner comprising ceramic balls.
  • the burner body preferably comprises a gauze holder having a U-shaped profile. This is a unit, which can easily be replaced. This burner body can easily be fabricated when the holder retains a plurality of gauze plates retained by meant of bent-over tags of the holder. Tests have shown that a very well operating burner is achieved with a burner body comprising at least one gauze of expanded material. This gauze has a considerable heating surface and forms a considerable flow resistance reducing the wind velocity, when the wind flows through the burner. So the required number of gauze layers is smaller when using expanded material. Further this material has the additional advantage of the use of an element which can be produced at extremely low cost.
  • the preferred embodiment of the burner according to the invention comprises a plurality of gauze plates having rhombic meshes, the directions of length of which are alternately transverse of one another. This again increases the wind flow resistance and improves the heating of the material of the burner body.
  • the railway points-heater 60 comprises a gas/air mixing apparatus 1 having a gas manifold 17 connected with a gas pipe 16 and an air suction hood 18. The air is sucked in with the aid of the gas fed in under pressure.
  • the gas/air mixture flows through a common burner pipe 2 connected with the mixing apparatus 1 towards a plurality of burners 3.
  • the burners 3 each comprise a burner housing 61 and a burner body 4 arranged therein and having passages.
  • the passages establish a communication between a flame chamber 23 facing a rail 21 and a gas distribution chamber 62 extending in the direction of length of the burner 3.
  • the gas distribution chamber 62 communicates through a slot 63, a cavity 64 and an opening 65 of the burner pipe 2 with said burner pipe 2.
  • a flash-over pipe 5 Parallel to the burner pipe 2 is arranged a flash-over pipe 5, which communicates through an aperture 66 of the flash-over pipe 5, a channel 67 and through an aperture 68 in the holder 69 of the burner body 4 with the flame chamber 23.
  • the flash-over pipe 5 is united with the burner pipe 2 to a profile. Midway between the burners 3 the flash-over pipe 5 communicates with the burner pipe 2 through gauze 14, which is fastened by a screw head 25 to a tie piece 6. This tie piece 6 is screwed into a nipple 32 arranged between the flash-over pipe 5 and the burner pipe 2 (see Fig. 18).
  • the burner according to the invention comprises an ignition device.
  • this device comprises only one electric ignition member 15.
  • the electrodes 8 and 38 of the ignition member 15 are located in the flash-over pipe 5 and are connected to a pulse producer 26 providing periodically a voltage pulse of 20 kV in periods of 20 to 15 seconds.
  • the burner body 4 mainly consists of a gauze packet within which the combustion of the gas takes place, as a result of which the burner is not blown out by wind produced, for example, by a passing train.
  • the burner body 4 comprises a gauze holder 69 of U-shaped profile. This gauze holder is formed by a perforated plate which distributes the aas at a flow resistance of 0.5 to 1 mm wc [5 to 10 Pa] in the direction of length of the burner 3.
  • the circular perforations 70 may have a diameter of 1 mm and a relative distance of 2 mm.
  • gauze plates 71 preferably of expanded material are arranged in superposition, said plates having rhombic meshing 72 of a length a of 8 mm and a width b of 4 mm, the wire width being 0.7 mm.
  • the directions of length 73 and 74 of these rhombic meshes of the gauze plates 71 are alternately transverse of one another. Beneath the gauze plates 71 adjacent the gas distributing body of the U-shaped holder 69, there is arranged a flame extinguishing gauze 75 of 40 to 80 mesh.
  • the entire gauze packet consists of refractory gauze and has a flow resistance of 1 to 3 mmwc [10 to 30 Pa].
  • the gauzes 71 and 75 are retained in the holder 69 by bent-over tags 76 of the holder 69. Above the apertures 68 the holder 69 does not contain gauzes 71, 75, but at this area the limbs 77 of the U-shaped profile are bent over towards one another.
  • a simple infrared burner which runs at a temperature of 800 to 1000 degrees C. and which is wind-resistant with a low pressure drop, its length t being 9 cm and its width s 1.5 cm in the burner body 4 having a combustion capacity of about 60 g of propane/hour or 0.09 m 3 /hour or normal natural gas, which corresponds to 600 to 750 kcal/hour.
  • the gauzes 71 may, though not preferably, have meshes of twice said size or smaller meshes, for example, 20 mesh.
  • the distance f of the burner 3 from the rail 21 may be 2 to 4 mm.
  • the railway points-heater 60 operates as follows:
  • the gas conduit 16 may be connected with a natural or synthetic gas means instead of being connected with a gas reservoir.
  • the extinction gauze 75 is arranged on the side of the holder 69 facing the gas distribution chamber 62.
  • the gauze packet comprises apart from the holder 69 and a gas extinction gauze 75, a wound-up gauze 80 of expanded material corresponding to the gauze plates 71.
  • the burner 81 of Fig. 19 is longer than the burner 3 and has in a housing two cavities having two separated gas distribution chambers 62, but one uninterrupted burner body 4 and only one channel 67.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Gas Burners (AREA)

Claims (5)

1. Brenner (3) für einen Weichenheizer mit einem Brennergehäuse (61) und mindestens einem in diesem Gehäuse untergebrachten, Durchgänge aufweisenden Brennerkörper (4) dadurch gekennzeichnet, dass der Brennerkörper (4) im wesentlichen aus einem Gazepaket mindestens einer Flammlöschgaze (75) und mindestens dreier, vorzugsweise mehr als drei Glühgazen besteht, innerhalb deren die Verbrennung stattfindet, welche Flammlöschgaze und welche Glühgazen in der Strömungsrichtung in Reihenfolge angeordnet sind und welche Glühgazen naheeinander angebracht sind und gemeinsam einen Glühkörper bilden, _der ausreichend erhitztes Material enthält, um die Temperatur des Brennerkörpers (4) während einer bestimmten Zeit nach dem Löschen der Flamme über die Zündtemperatur aufrechtzuerhalten.
2. Brenner nach Anspruch 1, dadurch gekennzeichnet, dass der Brennerkörper (4) mindestens eine Gaze aus Streckmaterial enthält (Fig. 10 bis 13).
3. Brenner nach einer der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Brenner eine Anzahl von Gazen (71) mit rautenförmigen Maschen (72) enthält, die abwechselnd mit der Längsrichtung der Maschen quer aufeinander liegen (Fig. 10 bis 13).
4. Brenner (3) nach einem der vorhergehenden Ansprüche dadurch gekennzeichnet, dass der Brennerkörper (4) einen Halter (69) aus Gaze mit U-förmigem Profil enthält.
5. Brenner nach Anspruch 4, dadurch gekennzeichnet, dass die Anzahl von Gazen (61) mittels abgebogener Zungen (76) des Halters (69) im Halter (69) eingesperrt ist.
EP19800200021 1979-02-06 1980-01-09 Brenner für Weichenheizvorrichtung Expired EP0014485B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NL7900937 1979-02-06
NL7900937 1979-02-06
NL7901084A NL7901084A (nl) 1979-02-12 1979-02-12 Brander voor een wisselverwarmer.
NL7901084 1979-02-12

Publications (2)

Publication Number Publication Date
EP0014485A1 EP0014485A1 (de) 1980-08-20
EP0014485B1 true EP0014485B1 (de) 1983-03-30

Family

ID=26645495

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800200021 Expired EP0014485B1 (de) 1979-02-06 1980-01-09 Brenner für Weichenheizvorrichtung

Country Status (2)

Country Link
EP (1) EP0014485B1 (de)
DE (1) DE3062481D1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2004480C2 (nl) 2010-03-17 2011-09-20 Volkerrail Nederland B V Verwarmings-/koelelement voor een spoorwegwissel.
JP6190186B2 (ja) * 2013-07-03 2017-08-30 東日本旅客鉄道株式会社 融雪装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2815747A (en) * 1953-03-26 1957-12-10 Walter H Greenfield Railroad switch heaters and oil burning systems therefor
DE1111661B (de) * 1957-03-15 1961-07-27 Christiaan Jurriaan Johannes H Gasheizvorrichtung fuer Weichen
GB1095998A (en) * 1964-04-21 1967-12-20 Bullfinch Gas Equip Improvements relating to gas-burning heating appliances
FR1439978A (fr) * 1965-03-31 1966-05-27 Appareil de chauffage pour installations à l'air libre
FR2292928A1 (fr) * 1974-11-29 1976-06-25 Int Magna Corp Appareil de chauffage par rayonnement infra-rouge

Also Published As

Publication number Publication date
DE3062481D1 (en) 1983-05-05
EP0014485A1 (de) 1980-08-20

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