SU101094A1 - Instrument for measuring rail deflection on curved sections of a railway track - Google Patents

Description

Instruments for measuring the deflection of rails on curved sections of a railroad track, in which the self-recording mechanism carrying frame consists of interconnected elements, are known. The frame of such devices is provided with rollers that guide the device along the rails, and a thin cable that forms a chord of the curve. A disadvantage of the known devices of this type is that they do not automatically maintain a constant tension of the cable, and, consequently, the accuracy of determining the deflection of the boom.

The device according to the invention is free from this disadvantage. The essence of the invention is that the frame of the device is made sliding and provided with spring inserts, providing its elastic bending in the process of measuring the deflection of the rails. In order to give the frame elasticity in the plane of arrangement of its constituent elements, the frame has the appearance of two successively interconnected trapezoids without large bases, the adjacent lateral sides of which are made of telescopic tubes, spring-loaded in the axial direction.

FIG. 1 is a schematic top view of an instrument frame in

working position; in fig. 2 is an end view of the self-recording mechanism (with the cover removed); in fig. 3 - view of the self-recording mechanism in the casing.

The frame of the device is formed by tubular elements I, 2, 3, 4, 5 and 6 of variable cross section. The elements making up the frame are located on the sides of two series-connected trapeziums. The frame elements are interconnected by hinges. The frame has seven rollers 7, with which it is supported on the rails during the measurement process. The axis of the rollers are inclined to the horizon at an angle of about 25 °.

The free ends of the end elements} and 6 carry the plugs 8 on which the cable 9 is put on. The adjacent elements 3 and 4 of the frame, which form the sides of the trapezium, are made telescopic and provided with spring inserts 10.

To move the tool, the end elements of the frame are provided with branch pipes for wooden handles.

The self-recording mechanism is mounted in a metal frame and is located in the middle of the frame on the telescopic elements. It is equipped with a tape mechanism. The axis // of the coil for the tape, through an intermediate gear 12, 13 and 14, receives periodic turns from roller 7. To record the deflection boom, a lever 15 with two pencils 16 and 17 is connected to the tension between the end elements of the cable 9. Pencil 16 records the value of the arrow deflection, and pencil 17 marks the length of the chords. With a pencil 16 interacts spring-loaded strap 18, mixed, Aem by hand. To damp the vibrations of the lever and the cable connected to it, there are two shock absorbers 19 and 20, the pistons of which are connected to the lever 15 through the lever system. The self-recording mechanism is set to its original position with the help of a pull-out ruler 21 with a vertical rod 22 fitted with a fork 23 at the end.

The measurement of the deflection of the rails on the curved sections of the railway track is made as follows.

The frame of the device is placed between the rails and on the pins 8 of the end elements 1 and 6 put on the cable 9. After that, the frame is installed rollers 7 on the rails. Then a self-recording mechanism is attached to the frame. The correct position of the latter relative to the cable is determined with the help of a sliding ruler 21. The pencil carrying lever 15 is inserted into the hole of the pad sitting on the cable and fastened with a screw to it. The installation of the self-recording mechanism is carried out so that the lower pencil with its tip stands on the zero line laid by the upper pencil. After fastening the lever with the cable, the adjusting ruler is retracted into the body of the self-recording mechanism.

Before measuring the arrows of the deflection, the curve of breaking the Eot into areas with ten-meter chords and marking them with chalk on the neck of the outer

rail curve from the inside with the serial number from the beginning to the end of the curve. Then proceed to measure the deflection curve of the curve. In the straight part of the path, the tip of the lower pencil is on the zero line. As the instrument enters the curve, the pencil lever moves away from the outer rail and draws a curve. When the lever passes through the end and the beginning of the chords marked on the rail, the person serving the device quickly pulls away the lever of the spring-loaded plank 18, which strikes the lower pencil that causes a point on the ribbon. The distance between the points gives a chord value on a certain scale.

Subject invention

Claims (2)

1. Instrument for measuring the arrows of the deflection of rails on curved sections of a railway track, made in the form of a frame formed from individual elements, carrying a self-recording mechanism with a pencil receiving movements from the cable-forming curve of the cable and equipped with rollers on which the frame moves along the rails during the measurement railway track, characterized in that, in order to ensure the constant tension of the chord forming cable, the frame is made sliding and provided with spring inserts ensuring its elas Partial bending in accordance with the curvature of the railway track and automatic change in length. 2. The form of the device according to claim 1, characterized in that, in order to give the frame elasticity in the plane of the arrangement of its elements, the frame is made in the form of two trapezium sequentially interconnected without bottom bases. k s 6i, s with cJ S ishi