EP1897993A1 - Hitzeschild für Schienen - Google Patents

Hitzeschild für Schienen Download PDF

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Publication number
EP1897993A1
EP1897993A1 EP07116103A EP07116103A EP1897993A1 EP 1897993 A1 EP1897993 A1 EP 1897993A1 EP 07116103 A EP07116103 A EP 07116103A EP 07116103 A EP07116103 A EP 07116103A EP 1897993 A1 EP1897993 A1 EP 1897993A1
Authority
EP
European Patent Office
Prior art keywords
heat shield
rail
reflective surface
shield according
engagement means
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.)
Withdrawn
Application number
EP07116103A
Other languages
English (en)
French (fr)
Inventor
Darryl Mark Stephenson
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.)
Unitchain Ltd
Original Assignee
Unitchain Ltd
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
Priority claimed from GBGB0617908.9A external-priority patent/GB0617908D0/en
Application filed by Unitchain Ltd filed Critical Unitchain Ltd
Publication of EP1897993A1 publication Critical patent/EP1897993A1/de
Withdrawn legal-status Critical Current

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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
    • E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise

Definitions

  • This invention relates to a heat shield for a rail, more specifically for a rail of a railway track.
  • Rail tracks typically comprise two parallel steel rails, each rail being formed of a series of individual rail sections placed end to end. It is clear that excessive heating of the rails, most particularly by incident solar heating, could expand the rail sections and in the extreme case cause buckling of the rails.
  • the speed restrictions are determined according to the arrangement of the rail (for example the level of ballasting provided, whether the rail is on a shoulder of a bend etc) and to the measured rail temperature.
  • a speed restriction of 60 mph may be imposed at rail temperatures between about 43C and about 46C, and a speed restriction of 20 mph for rail temperatures over about 46C.
  • Fig. 1 shows a sectional view of a rail 1, with part of a heat shield 2 according to an embodiment of the present invention attached thereto.
  • the heat shield is shown from the side in Fig. 2.
  • the rail 1 is of standard design, and includes a base 3, which is typically surrounded by ballast material (not shown).
  • the heat shield 2 includes an engagement means 4 for engaging the rail 1.
  • the engagement means 4 comprises a resiliently deformable clip which may be easily attached to the base 3 and held there by friction.
  • the clip supports a bracket 5 which extends upwardly therefrom.
  • the bracket 5 includes a frame 6 which includes first and second guide channels 7 and 8 at its ends.
  • the frame 6 is curved away from the rail, and extends past the base of the rail in a horizontal so that it lies above a portion of the ballast material if present.
  • the bracket 5 is shaped so as to maintain an air gap 9 between itself and the rail 1.
  • An elongate sheet 10 is retained by the guide channels 7 and 8, so that it extends along the length of the rail 1.
  • the outer surface 11 of the sheet 10 is reflective, and is glossy and coloured white to maximise reflection.
  • the sheet 10 comprises a plastics material with a closed-cell structure for rigidity.
  • the sheet is bent into an arcuate shape by the frame 6 when retained by the guide channels 7, 8, with the reflective surface 11 facing away from the rail 1.
  • the length of the sheet is predetermined according to any curvature of the rail 1. For example, on a relatively tight bend of the railway track, a relatively short length of sheet may be used in comparison to a relatively straight track section.
  • additional engagement means, brackets and frames may be used to support the sheet at various points along its length if necessary.
  • the heat shield is attached to that side of the rail which receives the most incident sunlight during the day.
  • This side of the rail may also be painted with white paint, as is known in the art, on areas of the rail which are not protected by the heat shield.
  • the other side of the rail may be coated with heat-dissipating paint.
  • the reflective surface 11 of the sheet 10 acts to reflect incident solar radiation away from the rail. Because the sheet lies over the portion of the ballast material around the base of the rail, this ballast material is also shielded, which prevents it transmitting heat to the rail 1 by conduction or re-radiation.
  • the provision of air gap 9 provides ventilation for the rail 1 to improve cooling.
  • the shaping of the heat shield produces a venturi effect which acts to draw air through the gap, further improving cooling of the rail 1. Because the reflective surface is smooth and glossy, it is easier to keep clean than a painted surface, and rainfall alone may be sufficient for this purpose.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
EP07116103A 2006-09-11 2007-09-11 Hitzeschild für Schienen Withdrawn EP1897993A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0617908.9A GB0617908D0 (en) 2006-09-11 2006-09-11 Heat shield for rails
GB0621709A GB2441536A (en) 2006-09-11 2006-11-01 Railway rail heat shield

Publications (1)

Publication Number Publication Date
EP1897993A1 true EP1897993A1 (de) 2008-03-12

Family

ID=38608740

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07116103A Withdrawn EP1897993A1 (de) 2006-09-11 2007-09-11 Hitzeschild für Schienen

Country Status (1)

Country Link
EP (1) EP1897993A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3954827A1 (de) * 2020-08-11 2022-02-16 SEALABLE Solutions GmbH Elastomerprofil als aufheizschutz für schienen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1846154A (en) * 1931-03-21 1932-02-23 Thomas J Skillman Sand catching means for railways
CH178461A (de) * 1934-12-29 1935-07-31 Feldmann Oskar Gegen hochgradige Erwärmung durch Sonnenbestrahlung geschützte Gleisanlage.
GB1391114A (en) * 1971-05-19 1975-04-16 Petersson B Method of treating railway rails to reduce the absorption of solar radiation
EP0150264A1 (de) * 1983-12-24 1985-08-07 Hoesch Aktiengesellschaft Schiene mit Dämpfungsmittel
SU1740555A1 (ru) * 1990-01-17 1992-06-15 Государственный проектно-изыскательский институт транспортного строительства "Мосгипротранс" Железнодорожный путь на сильнольдистых вечномерзлых грунтах
WO2001066859A1 (en) * 2000-03-10 2001-09-13 Multiclip Company Limited Device for use on railway track

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1846154A (en) * 1931-03-21 1932-02-23 Thomas J Skillman Sand catching means for railways
CH178461A (de) * 1934-12-29 1935-07-31 Feldmann Oskar Gegen hochgradige Erwärmung durch Sonnenbestrahlung geschützte Gleisanlage.
GB1391114A (en) * 1971-05-19 1975-04-16 Petersson B Method of treating railway rails to reduce the absorption of solar radiation
EP0150264A1 (de) * 1983-12-24 1985-08-07 Hoesch Aktiengesellschaft Schiene mit Dämpfungsmittel
SU1740555A1 (ru) * 1990-01-17 1992-06-15 Государственный проектно-изыскательский институт транспортного строительства "Мосгипротранс" Железнодорожный путь на сильнольдистых вечномерзлых грунтах
WO2001066859A1 (en) * 2000-03-10 2001-09-13 Multiclip Company Limited Device for use on railway track

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 199324, Derwent World Patents Index; AN 1993-194576, XP002457554 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3954827A1 (de) * 2020-08-11 2022-02-16 SEALABLE Solutions GmbH Elastomerprofil als aufheizschutz für schienen

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