The invention relates to base part of a mold for aluminothermic welding of metal rails, which base part generally has a rectangular parallelepiped and has an upper face for receiving the foot of said rails, this upper face having a hollow cavity comprising a base, two opposing longitudinal side walls, and two opposing transverse side walls. The invention is characterized in that each of said longitudinal side walls has an intermediate region surrounded by two end regions, and these end regions are located in the same plane, whereas the intermediate region has a curved profile, the well of which is directed towards the opposite side wall.
E01B 29/42 - Assemblage ou fixation de façon définitive des composants de la voie dans ou sur la voie, p. ex. par soudage, collageAssemblage préalable des composants de la voie par collageScellement des joints avec des composants de remplissage
E01B 29/46 - Dispositifs pour maintenir, mettre en position ou presser l'une contre l'autre les extrémités de rails
B23K 101/26 - Rails pour chemins de fer ou similaires
The invention relates to base part (6) of a mold (M) for aluminothermic welding of metal rails (3), which base part generally has a rectangular parallelepiped and has an upper face (60) for receiving the foot (5) of said rails (3), this upper face (60) having a hollow cavity (61) comprising a base (610), two opposing longitudinal side walls (62), and two opposing transverse side walls (63). The invention is characterized in that each of said longitudinal side walls (62) has an intermediate region (620) surrounded by two end regions (621), and these end regions (62) are located in the same plane, whereas the intermediate region (620) has a curved profile (C1), the well of which is directed towards the opposite side wall (62).
E01B 29/42 - Assemblage ou fixation de façon définitive des composants de la voie dans ou sur la voie, p. ex. par soudage, collageAssemblage préalable des composants de la voie par collageScellement des joints avec des composants de remplissage
after filling of the molding cavity, triggering a second aluminothermic reaction above the rail head, and casting the metal derived from said reaction into said molding cavity in the region of the rail head.
The invention also concerns a mold (1) adapted to fit over the two rail ends to form a molding cavity (10), comprising a crucible (4) arranged above the region of the rail head so that it is fed with molten metal from the molding cavity (10) via a secondary channel (42).
B22C 9/22 - Moules pour pièces de forme particulière
B22D 19/04 - Coulée dans, sur, ou autour d'objets formant partie intégrante du produit final pour raccorder des pièces
B22D 19/16 - Coulée dans, sur, ou autour d'objets formant partie intégrante du produit final pour fabriquer des moulages composites à partir de métaux différents, p. ex. pour fabriquer des cylindres de laminoirs
5.
METHOD AND DEVICE FOR THE ALUMINOTHERMIC WELDING OF RAILS
Method for the aluminothermic welding of rails, involving the steps of: - triggering an aluminothermic reaction in a crucible (2), - pouring the metal resulting from said reaction into the mould (1) so as to fill the moulding cavity from the rail flange, - after filling the cavity, triggering a second aluminothermic reaction above the rail head, and pouring the metal resulting from said reaction into the cavity in the region of the rail head. The mould (1) used in the method is designed to fit over the ends of two rails to form a moulding cavity (10) comprising a crucible (4) positioned above the rail head region so that it can be fed with molten metal of the cavity (10) via a secondary passage (42).
Method for the aluminothermic welding of rails, involving the steps of: - triggering an aluminothermic reaction in a crucible (2), - pouring the metal resulting from said reaction into the mould (1) so as to fill the moulding cavity from the rail flange, - after filling the cavity, triggering a second aluminothermic reaction above the rail head, and pouring the metal resulting from said reaction into the cavity in the region of the rail head. The mould (1) used in the method is designed to fit over the ends of two rails to form a moulding cavity (10) comprising a crucible (4) positioned above the rail head region so that it can be fed with molten metal of the cavity (10) via a secondary passage (42).
The rail attachment system comprises a lateral stop (19), an elastic fastener (17) and an anchoring device and is characterised in that the elastic fastener comprises a U-shaped central loop (42) and in that the lateral stop comprises an elevated guide block (39) to guide the central loop so that, while being fitted, the fastener moves in a direction perpendicular to the rail.
The mold for aluminothermic welding of metal rails has two components made of identical rigid refractory material and suitable for fitting around two ends of rails to be welded, each component includes: a lower part having a face defining a mold cavity suitable for enveloping the foot and a core of the ends of the rails, and a channel opening at the bottom into a lower region of the mold cavity and having at the top an opening and an upper part including a cooling chamber connected to the mold cavity and capable of containing the heads of the rail ends, the cooling chamber forming a non-compartmentalized volume to which the channel is connected via the opening and which is bounded by an external wall of each mold component.
The invention relates to a device for igniting an aluminothermic composition, characterized in that it comprises an electric resistor for connecting two electrodes and to be supplied by an electric current source of in order to generate heat by a Joule effect, said electric resistor being exposed to a medium comprising oxygen and carbon so that the temperature rise of the medium by the resistor results in the formation of carbon monoxide, and then in an exothermal reaction of the latter with oxygen, thus generating a flame capable of igniting of the aluminothermic composition.
F23Q 7/22 - Allumage par incandescenceAllumage utilisant de la chaleur produite électriquement, p. ex. briquets pour cigarettesBougies incandescentes à chauffage électrique Parties constitutives
Attachment of a rail to a track support equipped with a lateral shoulder using an elastic attachment device. The device comprises a lateral stop (19) interposed between the shoulder (15) and the edge of a flange (21) of the rail, a plate-like elastic attachment (23) and anchorage (27), the said lateral stop (19) comprising at its top a region of contact (33) for the elastic attachment in order to delineate the deformation thereof.
The mould (6) for aluminothermic welding of metal rails (2) has two components (19, 22) made of identical rigid refractory material and suitable for fitting around two ends (3) of rails to be welded, each component comprising: a lower part having a face (21) defining a mould cavity (25) suitable for enveloping the foot (8) and a core (12) of the ends of said rails, and a channel (38) opening at the bottom into a lower region of the mould cavity and having at the top an opening (39) and an upper part comprising a cooling chamber (32) connected to the mould cavity and capable of containing the heads (14) of said rail ends, the cooling chamber forming a non-compartmentalized volume to which the channel (38) is connected via the opening (39) and which is bounded by an external wall (27) of each mould component.
E01B 29/42 - Assemblage ou fixation de façon définitive des composants de la voie dans ou sur la voie, p. ex. par soudage, collageAssemblage préalable des composants de la voie par collageScellement des joints avec des composants de remplissage
The mould (6) for aluminothermic welding of metal rails (2) has two components (19, 22) made of identical rigid refractory material and suitable for fitting around two ends (3) of rails to be welded, each component comprising: a lower part having a face (21) defining a mould cavity (25) suitable for enveloping the foot (8) and a core (12) of the ends of said rails, and a channel (38) opening at the bottom into a lower region of the mould cavity and having at the top an opening (39) and an upper part comprising a cooling chamber (32) connected to the mould cavity and capable of containing the heads (14) of said rail ends, the cooling chamber forming a non-compartmentalized volume to which the channel (38) is connected via the opening (39) and which is bounded by an external wall (27) of each mould component.
E01B 29/42 - Assemblage ou fixation de façon définitive des composants de la voie dans ou sur la voie, p. ex. par soudage, collageAssemblage préalable des composants de la voie par collageScellement des joints avec des composants de remplissage
13.
DEVICE FOR IGNITING AN ALUMINO-THERMAL COMPOSITION, CRUCIBLE CONTAINING SAME AND RELATED METHODS
The invention relates to a device (1) for igniting an alumino-thermal composition (4), characterised in that it comprises an electric resistor (40, 43) for connecting two electrodes (20, 21) and to be supplied by an electric current source in order to generate heat by a Joule effect, said electric resistor being exposed to a medium containing oxygen and carbon so that the temperature rise of the medium by the resistor results in the formation of carbon monoxide, and then in an exothermal reaction of the latter with oxygen, thus generating a flame capable of igniting the alumino-thermal composition.
The invention relates to a device (1) for igniting an alumino-thermal composition (4), characterised in that it comprises an electric resistor (40, 43) for connecting two electrodes (20, 21) and to be supplied by an electric current source in order to generate heat by a Joule effect, said electric resistor being exposed to a medium containing oxygen and carbon so that the temperature rise of the medium by the resistor results in the formation of carbon monoxide, and then in an exothermal reaction of the latter with oxygen, thus generating a flame capable of igniting the alumino-thermal composition.
This invention concerns a mould for alumino-thermic welding of rail tracks. The compressible coating (58) used to seal the imprint of the mould from liquid-state metal solder leaks is limited to certain bearing surface (52) parts of the parts (19) of the mould on the rails to be welded, corresponding to the bottom, sides and top of the skate, to the sides of the core and top of the mushroom. The rigid refractory material of the parts (19) is exposed in the bearing surface parts (67, 71) corresponding to the sides and top of the mushroom and apt to be selectively removed in the latter. The result is an easier adaptation of the mould to more or less worn rails.
B23K 37/06 - Dispositifs ou procédés auxiliaires non spécialement adaptés à un procédé couvert par un seul des autres groupes principaux de la présente sous-classe pour mettre au bon emplacement les matériaux fondus, p. ex. pour les retenir dans une zone désirée
16.
Mould for aluminothermic welding of railway rails, at least one of which is worn
This present invention concerns a mold for the aluminothermic welding of railway rails. The compressible lining (58) used to seal the molding die in relation to leakages of the weld metal in the liquid state is limited to the parts of the contact surfaces (52) of the parts (19) of the mold on the rails to be welded, corresponding to the bottom, the sides and the top of the foot, to the sides of the web and below the head. The rigid refractory material of the parts (19) is exposed in the parts (67, 71) of the contact surfaces corresponding to the sides and the top of the head, and suitable to be removed selectively from the latter. This makes it easy to adapt the mold to rails with different degrees of wear.
The invention concerns a mold for aluminothermal welding of railway tracks. The refractory coating (58) used for sealing the molding cavity (25) against liquid-phase welding metal leakage extends continuously from one to the other of the surface portions (52) defining spans supporting the parts (19) of the mold on the rails (2) to be welded, and delimits itself the molding cavity (25), thereby providing better continuity between the weld seam and the rails (2) and a better surface condition of the weld seam, as well as enhancement of preheating performance.
A cover for closing a top opening of a thermite reaction chamber of a crucible is substantially continuous and is secured to an annular filter lining via a bottom peripheral edge for making contact on a top peripheral edge of the crucible. The filter lining is substantially continuous and is suitable for constituting a substantially continuous contact medium between the bottom edge and top edge. The cover is applicable, for example, to thermite welding, e.g., for use in tunnels or underground.
B65D 51/16 - Fermetures non prévues ailleurs avec moyens pour laisser partir l'air ou le gaz
B65D 3/00 - Réceptacles rigides ou semi-rigides ayant un corps ou des parois périphériques de section transversale courbe ou partiellement courbe, réalisés en enroulant ou courbant du papier sans plier selon des lignes définies
