SU1664942A1 - Insulating rail joint - Google Patents

Abstract

This invention relates to railway transport and can be used in electric rail circuits. The purpose of the invention is to increase the reliability of the insulating joint. The device contains placed between the ends of the rails 4 and 5 electrically insulating gasket 1, as well as liners 2 and 3, made of non-magnetic or low-magnetic material. The height of the liners 2 and 3 is less than the height of the rails 4 and 5 and gasket 1. 1 Il.

Description

The invention relates to railway transport, and more specifically to a superstructure, and can be used in electric rail circuits of railway transport.

The aim of the invention is to increase the reliability of the insulating joint by reducing the likelihood of electrical connection of the rails insulated from each other by protecting the electrically insulating gasket from the metallization of the upper surface of its head with electrically conductive metal particles.

The drawing shows the placement of the end liners and gaskets in the insulating joint.

The joint contains an end insulating gasket 1 placed between the end metal liners 2 and 3. The liners 2 and 3 and the gasket 1 are placed between the ends of the rails 4 and 5. The upper surfaces of the heads of the liners are located below the upper surfaces of the rail heads by an amount within 0, 02-0.3 of the height of the rail head, for which the height of the head of the inserts is reduced by the appropriate amount. Elements 6 and 7 designate ferromagnetic metal particles accumulated on the upper edge of the rail end, which are lined up in chains along the magnetic field lines of the rail end. The accumulation of particles 7 partially see the wheel rim 8 of the mobile unit of railway transport.

Electrically insulating joint operates as follows.

An electrical potential applied to the rail 4 is transferred to the liner 2 being in contact with it. The isolating pad 1 electrically isolates the liner 3 and the rail 5 in contact with it from the liner 2 and rail 4.

Ferromagnetic magnetized or non-agglomerated particles falling from mobile railway units (shavings, sawdust, dust from transported cargo) are showered on rails, which, as a rule, are weakly magnetized under the influence of the Earth's magnetic field, tractive current and other factors. At the edges of the ends of the rails, their magnetic field has an increased intensity, as a result of which they attract the greatest amount of

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ferromagnetic particles that line up along field lines. If the face bushings 2 and 3 were made of ferromagnetic material, metal particles could also accumulate on the edges of their ends, similar to clusters 6 and 7 on the rail ends 4 and 5. And if the bushings had the same height as the rails, the accumulations of ferromagnetic particles would hang over the electrically insulating gasket 1, and the wheels of transport units would press them into the upper surface of the head of the electrically insulating gasket, which is made of dielectric and has a lower hardness than the surface of the rim of the wheel and heads rail ki and lower hardness than ferromagnetic particles. Gradually accumulating metal particles on itself, the surface of the insulating gasket could gradually metallize, which would eventually lead to a short circuit of the joint.

Distinctive features of the proposed technical solution exclude this possibility. Making liners 2 of a non-magnetic or weakly magnetic material completely eliminates the possibility of the formation of clusters of ferromagnetic particles on the edges of the ends of the liners or many times reduces their number compared to what accumulates on the ends of the rails. The location of the upper surface of the heads of the liners below the upper surfaces of the heads of the rails creates a free space between the rail and the face gasket above the liner. Ferromagnetic particles b and 7 are lowered into this free space when they are pressed down by the rim of the wheel 8. After passing through the junction of the wheel, the clusters of ferromagnetic particles re-align along the magnetic field lines.

Thus, making liners 2 and 3 of a non-magnetic or weakly magnetic material and their height, lower than rails, makes it possible to eliminate or substantially reduce the accumulation of conductive particles on the upper surface of the head of the insulating gasket. The strength of a short circuit of an insulating joint with these particles. When making inserts of a weakly magnetic material (diamagnetic or paramagnetic), the length of the chains of ferromagnetic particles accumulated on them will be small compared to the length of the chains on the rails. Particles will not be able to reach the surface of the insulating gasket if the length of the chains is less than the difference in height between the liners and the gasket. In this case, in order to avoid the possibility of ferromagnetic particles falling on the upper surface of the gasket, the difference in gasket heights and liners must be greater than the maximum length of the chains of ferromagnetic particles.

Claims (1)

Invention Formula An insulating rail joint containing an electrically insulating gasket placed between the ends of the rails, made height equal to the rail height, as well as inserts located between the gasket and the rail ends, characterized in that, in order to increase the reliability of the joint by protecting the electrically insulating gasket from metallization heads with electrically conducting metal particles, inserts made of a nonmagnetic or weakly magnetic material, and their height is less than the specified height. with: j