Railways – Track layers – Joint welders
Patent
1991-04-29
1993-03-23
Le, Mark T.
Railways
Track layers
Joint welders
104 2, E01B 2917
Patent
active
051954362
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The subject of the present invention is a process for the continuous welding of railroad rail sections during the laying down thereof, and a train set particularly equipped in order to carry out this process.
2. Description of Related Art
According to the conventional procedure in laying down the railroad rails, the rail sections, usually coming from the manufacturing factory in lengths of 36 meters, are welded abutting in succession one after the other to form sections of 144 meters, which are transported to the laying place. There, after having been laid down by an operating train, the sections are welded abutting in succession one after the other in order to form final lengths of 288 or 432 meters, or any other fixed length. The welding is done by an electric spark process, or by an aluminothermic process, onto the already laid down rails. Conventionally, the rail sections to be laid down were laid onto the ground alongside the railroad line, but it is already known through improvements already introduced that the rail sections having the length of 144 meters are charged onto special trucks on which also the ties are carried, and which are provided with guides for a portal crane, used for transporting the ties to be laid down and, in case, the removed old ties. The rails are charged in a position underlying the charge of ties, and both the rails and the ties are fed to a special machine, being a part of the operating train, which provides for laying down the new rails and ties, possibly after removing the old ties and rails to be replaced, and in case for effecting other operations too. However, the welding of already laid down rail sections should be performed by a spark welding machine mounted onto a special railroad truck which operates following the operating train, but such a machine is very expensive and needs skilled personnel. Moreover, rather complicated operations, special equipment and correspondingly skilled personnel are needed in order to arrange to line and level the ends of the rail sections to be welded, and to keep the ends of the rail sections being laid pushed against the ends of the already laid down rail sections. It is also necessary that rest plates and correspondingly fixing screws are temporarily dismounted from the ties (and subsequently mounted again), which are included in the region in which the head of the welding machine is required to operate.
SUMMARY OF THE INVENTION
The object of this invention is to improve the process through which the rail sections being laid down are welded to the already laid down rail sections, in order that the expenses for the needed equipment are considerably reduced and the necessary personnel and preliminary labour are limited.
To this purpose, the invention proposes to insert into the operating train, between the trucks which carry the new rail sections and ties, and the machine which lays them down, a particularly equipped train set, and to effect on this equipped train a set the operations for arranging to line, to level and to abut the subsequent rail sections, as well as their welding, whereby the whole cycle of operations having reference to the welding is accomplished on board the operating train itself, and the laying down is done by the corresponding machine on already continuous rails.
Preferably, the welding of the rail sections is done by welding machines which are movable along the equipped train set, the welding operation being performed during a stroke of the welding machines with respect to the train set in a direction opposite the forward direction of the operating train, and said welding stroke being subsequently compensated by a return stroke of the welding machines with respect to the equipped train set, in the same direction as the forward direction of the operating train.
Due to this procedure, all preliminary labor and any operation for arranging to line, to level and to abut, as well as the welding operations, subsequent to the laying down of the rails, are avo
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