RU215388U1 - Upper double sliding pad for forced entry of the rail string to the optimal fixing temperature - Google Patents

Abstract

The utility model relates to the field of repair of a railway track, namely to a sliding gasket, which is used as an upper paired gasket when the rail strips are forced into the optimal fixing temperature when they are transferred to a constant operating mode. The upper paired sliding spacer for forced entry of the rail lash to the optimal fixing temperature is made in the form of a rectangular plate, on the end part of which there are side protrusions. The technical result of the present utility model is to increase the operational reliability of the upper double sliding pad by increasing its stability as part of the rail fastening and preventing it from falling out. 1 w.p. f-ly, 2 ill.

Description

Technical field

The utility model relates to the field of repair of a railway track, namely to a sliding gasket, which is used as an upper pair gasket when the rail strips are forced into the optimal fixing temperature when they are transferred to a constant operation mode.

State of the art

The fastening temperature of the rail lashes of a seamless track is one of the most important technical characteristics of the structure, affecting the stability of the rail-sleeper grid and traffic safety in general, as well as the ability to perform track work.

The laying of rail lashes of a seamless railway track is carried out under various temperature conditions, therefore, when the temperature changes, they may experience compressive or tensile stresses that exceed the normative values. If it is necessary to lay rail strips at a temperature of rails below the optimum by more than 5 ° C, a forced method is used to bring the strips into the optimum fixing temperature.

Forced methods of introducing lashes to the optimal fixing temperature are also used:

- before welding of operated lashes, previously laid and fixed at a temperature below the optimum by more than 5 ° C;

- when restoring the optimal temperature for fixing whips subject to theft or in areas where the whips were restored by welding, at temperatures below the optimum fixing temperature by more than 5 ° C.

Forced entry of the lashes to the optimum fixing temperature is performed using hydraulic tensioners or heating units, or with simultaneous action on the path of a hydraulic tensioner and a heating unit. From the prior art (Internet resource https://www.tdesant.ru/info/item/122, "Instructions for the installation, laying, maintenance and repair of a seamless track", approved by Order of Russian Railways dated December 29, 2012 No. 2788r, paragraph 4.7.4, reviewed on February 18, 2022), it is known to use the upper sliding gasket together with the lower polymeric paired gasket when forcing the rail strings into the optimum fixing temperature using heating installations. According to this source of information, the upper pair gasket is made in the form of a metal plate and has a thickness of 2.5-3 mm. This gasket is chosen as the closest analogue to the claimed utility model.

Before the forced entry of the rail lash to the optimal fixing temperature, the lash is unfastened, then the rail is lifted. The upper paired sliding pad is placed on the lower sliding pad placed on the elements of the intermediate rail fastening, after which the rail is lowered onto it. This design allows the rail to move along it while forcing the lashes into the optimum fixing temperature.

It is possible to carry out heating by means of heating devices (eg burners) which, when heated, subject the non-metallic parts of the intermediate rail fastening to thermal deformation. The combination of the upper metallic sliding pad and the lower non-metallic sliding pad allows to ensure the safety of the non-metallic elements of the intermediate rail fastening.

The disadvantage of such an upper double sliding pad is the absence of side protrusions on it, which does not ensure reliable stability of the pad as part of the rail fastening, which ensures low operational reliability, since the pad can slip during operation.

The technical problem of the claimed utility model is to overcome the technical disadvantages inherent in analogues, which leads to the need to create an upper pair of sliding pads for forced entry of the rail string to the optimum fixing temperature, which facilitates the movement of the rail string when heated, increases the service life of rail strings and rail fasteners when they are operation, as well as expanding the arsenal of technical means.

Disclosure of the essence of the utility model

The technical result of the present utility model is to increase the operational reliability of the upper double sliding pad by increasing its stability as part of the rail fastening and preventing it from falling out.

The technical result is achieved by using the upper pair of sliding pads for forced entry of the rail string to the optimum fixing temperature, made in the form of a rectangular plate, on one end part of which there are side protrusions.

The execution of the inventive sliding pad in the form of a rectangular plate ensures its versatility, as a result, it can be used in all types of intermediate rail fastenings: both lining (KB-65, ZhBR-65PSH, ZhBR-65PSHM and others), and in unlined (ZhBR-65, ZhBR-65Sh, ARS-4 and others) currently used in the construction of the railway track, which provides increased operational reliability of the said gasket.

The implementation of side protrusions on the end part of the gasket prevents it from falling out of the intermediate rail fastening when it is installed in such a way that the side protrusions are fixed on the protruding parts of the elements of the intermediate rail fastening (for example, fixing the protrusions on the flange of the lining, on the upper parts of the anchors, side stops, brackets thrust, etc. depending on the type of intermediate rail fastening).

In a particular case of the implementation of the utility model, the gasket can be made in the form of a metal plate, which makes it possible to save the non-metallic elements of the intermediate rail fastening from thermal deformation in the event of exposure to heating installations used in the forced entry of rail strips 800 m long or less into the optimal fastening temperature, which additionally affects the increase in the operational reliability of the gasket and the durability of the rail fastening as a whole.

The thickness of the inventive upper slip pad can preferably be 2-3 mm, while the paired (lower) slip pad is made with a thickness of 5-6 mm, these thicknesses are due to the technical characteristics of the rail fastening and the condition for saving material.

Brief description of the drawings

In FIG. 1 shows a top view of the inventive top pair gasket;

In FIG. 2 shows a side view of the inventive top pair gasket.

The inventive upper pair of sliding gasket (Fig. 1, 2) is made in the form of a rectangular plate, and on the end part of the gasket there are side protrusions 1.

The upper pair gasket in a particular case can be made with a length equal to 250 mm and a width (without side protrusions) of 148 ± 2 mm, and the width with side protrusions is (168-176) mm ± 1, and with a thickness of (2 .0-2.5) mm.

Implementation of the utility model

Before the forced entry of the rail lash to the optimum fixing temperature, the rail lash is released from fixing. Next, the end of the rail is raised.

In the case of a lining rail fastening, a lower polymer paired gasket is installed on the rail pad under the rail pad, and the inventive top pad is installed on top of it so that its side (long) side is located along the longitudinal axis of the rail pad. In this case, the side ledges of the specified top gasket abut against the flanges of the under-rail lining.

In the case of a non-lined rail fastening, a lower polymeric paired gasket is installed under the rail sole under the rail pad, and the inventive top gasket is installed on top of it in the same way (the side of the upper paired gasket is placed along the longitudinal axis of the rail sole). In this case, the side protrusions of the specified top gasket rest against the protruding elements of the brackets of the thrust or side stops.

Then the rail is lowered onto the upper paired gasket.

Heating installations are used when lengthening rail lashes with a length of 800 m or less. The lashes are heated in one direction from the fixed end to the movable one.

The lashes are divided into sections 50 m long, after which control and design sections are applied to them. After that, they begin to heat the lashes. During the heating process, the coincidence of the calculated risks on the whip with the control risks on the sleeper is monitored. If they do not match, the operating speed of the heating installation is reduced and an impact mechanism with a wedge stop is used, with the help of which the specified risks are achieved.

Upon completion of work on introducing the rail lash to the optimum fixing temperature, the upper and lower paired gaskets are removed and the lash is fixed.

Claims (2)

1. The upper pair of sliding gasket for forced entry of the rail lash to the optimum fixing temperature, made in the form of a plate, characterized in that the plate has a rectangular shape, and side protrusions are located on its end part. 2. The upper pair of sliding gasket according to claim 1, characterized in that it is made in the form of a metal plate.

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