BG61347B1 - Electroinsulated rail connection - Google Patents

Abstract

The connection can be applied in railway transport for building railroad tracks. It has improved wear resistance, simplified design and greater reliability. The connection includes an under rail base (1) on which there is an intermediate electroinsulation padding (2), two front-positioned rails (3) with an air gap between their fronts which are connected and wedged by two connections (4) of electroinsulation material fitted on both their sides and fixed by lateral bolt connections (5). In the air gap between the rails (3) there is an electroinsulation insert (6) and two terminals (7) fixed by bolt connections (8). The fronts of the two rails (3) are placed on the padding (2) of the base under the rail (1). Each of the terminals (7) presses the foot of the respective rail (3) to the electroinsulation padding (2). The two terminals (7) are fitted diagonally on the base under the rail (1) and are directly fixed to it by bolt connections (8). The electroinsulaation connections (4) are C-shaped. Between the walls of the web of every rail (3) and the external walls of the electroinsulation connections (4) there is a rubber layer (9), and a similar rubber layer is also placed on the external surface of every electroinsulation connection (4). The heads (11) of the lateral bolts (5) have D-shaped profile, matching the profile of the external wall of the electroinulation connections (4). Each terminal (7) has a middle upper rectangular platform (12) with a cylindrical hole for bolt (8) in the middle and a longitudinal chute (13) under it. On the rail (3) side there are several projecting studs (14) having elastic teeth (15) with longitudinal slots (16) on their lower side, resting on the foot of the rail (3). On the external side there is a V-shaped support (17) laid in a seat (18) of the base under the rail (1). Terminals (7) are fixed in bolt (8) directly under the base under the rail (1).

Description

TECHNICAL FIELD

The invention relates to an electrically insulated rail joint for use in rail transport, in particular for the construction of rail tracks.

BACKGROUND OF THE INVENTION

An electrical insulated rail joint is known, consisting of two frontally spaced rails with an air gap between their foreheads, which are connected and wedged by two transitional C-shaped joints of electrical insulation material arranged on both sides and fixed by transverse bolted connections. In the air gap between the rails there is an insulating insert made of polyethylene or cardboard. There is a rubber layer between the walls of the groove of each rail and the inner walls of the electrical insulation connections. A similar rubber layer is present on the inner surface of each insulation bond. Each of the rails is mounted on a rubber or polyethylene intermediate pad, which is mounted on a metal rib support, respectively, mounted on a second rubber or polyethylene intermediate pad, mounted on a corresponding sub-rail base, such as a traverse. The sleepers are wooden or concrete. The heel of each of the rails is pressed with two opposite terminals to the corresponding metal rib support. The terminals are fixed with bolts to the ribs of the ribbed metal pads, which in turn are fixed to the cross-ties with bolted joints [1].

A disadvantage of the known electrical insulated rail joint is that it has reduced abrasion resistance due to its low elasticity and the many rigid connections in it, which leads to increased rigidity of the road, wedge of the rails and limiting the possibility of their free linear expansion and contraction depending on temperature fluctuations. This disadvantage is compounded by the low reliability of the intermediate pads, which have a reduced elasticity and low coefficient of friction on the metal. In addition, the rail joint has a complicated construction, which further reduces its reliability.

It is an object of the invention to provide an electrical insulated rail joint with increased durability, simplified construction and increased reliability.

SUMMARY OF THE INVENTION

This task is solved by creating an electrical insulated rail joint consisting of a rail base with an intermediate electrical insulation pad on it, two frontally spaced rails with an air gap between their foreheads, which are connected and wedged by two C-shaped electrical insulation links, located on both sides. their sides and fixed with cross-bolted joints, with an insulating insert in the air gap between the rails, and two terminals for clamping the heels of the rails fixed by bolted connections. There is a rubber layer between the groove walls of each rail and the inner walls of the C-shaped electrical insulation links, with a similar rubber layer present on the outer surface of each C-shaped electrical insulation bond. The ends of the two rails are supported on the electrical insulation pad on the rail base. Each of the terminals presses the heel of the respective rail to the insulation pad. The two terminals are located diagonally on the track base and are fixed directly to it by the bolted connections. The heads of the cross bolts have a D-shaped profile, repeating the profile on the outer wall of the C-shaped electrical insulation connections. The intermediate insulating pad is made of polyurethane and the insulating insert is made of glass filled polyamide. Each terminal has a median upper rectangular platform with a cylindrical hole for the bolt in the middle and a longitudinal groove below it, and on the side of the rail there are several protruding thumbs with elastic teeth with longitudinal slots on their lower side, and on the outside of the rail. there is a V-shaped support placed in a bed on the rail base. The terminals are fixed with the bolts directly to the padded base. When the support base is wooden, there is a smooth metal support attached to it with typhoons. The lower surface of the terminals is smooth and their outer ends are flattened, with the screws screwed directly into the smooth metal pad. The insulation pad is provided with a U-shaped profile covering the track rail, and it has a U-shaped steel palestine. The sub-rail surface of the insulation pad consists of a plurality of truncated cones. The advantage of the insulated rail joint is that it has increased durability, simplified construction and increased reliability.

DESCRIPTION OF THE FIGURES Attached

In more detail, the invention is illustrated by an exemplary embodiment of the electrically insulated rail connection shown in the accompanying drawings, of which:

Figure 1 is a top plan view of an electrically insulated rail joint;

Figure 2 is a cross-sectional view of the rail joint according to AA;

Figure 3 is an axonometric view of the rail joint terminal on a concrete track base;

Figure 4 is a cross-sectional view of the BB rail joint at a concrete track base;

Figure 5 is a cross-sectional view of a rail joint on a wooden rail base;

Figure 6 is a sectional view of the polyurethane insulating pad of the rail joint.

EXAMPLE FOR THE IMPLEMENTATION OF THE INVENTION

The rail joint of FIGS. 1 and 2 consists of a track base 1 with an intermediate insulating pad 2 on it, two frontally spaced rails with an air gap between their foreheads, which are connected and wedged by two C-shaped electrical insulation links 4, located on both sides. their sides and fixed with transverse bolts 5, with an insulating insert 6 in the air gap between the rails 3, and two terminals 7 for clamping the heels of the rails fixed by the bolts 8. Between the groove walls of each rail 3 and internal is the walls of the C-shaped insulation links 4 has a rubber layer 9, with a similar rubber layer 10 having on the outer surface of each C-shaped electrical insulation connection 4. The ends of the two rails 3 are laid on the electrical insulation pad 2 of the track rail 1. Each of the terminals 7 press the heel of the respective rail 3 to the insulating pad 2. The two terminals 7 are diagonally located on the rail base 1 and are fixed directly to it by the bolt connections 8. The heads 11 of the cross bolts have a D-shaped profile, , repeat the profile of the outer wall of the C-shaped electrical connections 4.

Each terminal 7 of FIGS. 3 and 4 has an average upper rectangular platform 12 with a cylindrical opening for the bolt 8 in the middle and a longitudinal groove 13 below it, and on the side of the rail 3 there are several protruding fingers 14 with elastic teeth 15 with longitudinal slots 16 from their underside resting on the rail heel 3, and on the outside there is a V-shaped support 17 placed in the bed 18 on the track base 1. The terminals 7 are fixed with the bolts 8 directly to the track base 1.

The electrically insulated rail connection of FIG. 5 has a wooden rail base 1, and there is a smooth metal base 19 attached to it with triphons 20. The lower surface of the terminals 7 is smooth and their outer ends are flat. The bolts 8 are screwed directly into the smooth metal support 19.

The insulation pad 2 of FIG. 6 is provided with a U-shaped profile 21 covering the track rail 1, and there is a shaped steel plate 22. The rail surface 23 of the electrical track pad 2 consists of a plurality of truncated cones 24.

SUMMARY OF THE INVENTION

The action of an electrically insulated rail joint is as follows.

Passing the rolling stock (not shown in the figures) onto the rail joint due to the elasticity of the C-shaped electrically insulated joints results in a reduction in the collapse of the rails 3 by the wheels.

The pinching of the rail 3 by the wheel causes the C-shaped electrically insulated connections 4 to shrink, but in turn the shaped heads 11 of the bolts of the volt connections 5 counteract this shrinkage and increase the wedging force exerted on the heel head of the rail 3 by the Shaped electrical insulators connections 4. The rubber layers 9 and 10 provide continuous contact between the surfaces of the C-shaped electrical insulation connections 4, the grooves of the rails 3 and the D-heads of the bolts 11 of the bolted joints 5. Thus rail o compound is reacted as a monolithic. All this reduces the slack of the rails 3, virtually eliminates the threshold between the two rails 3 in the rail joint and increases its durability, as it prevents the impact on the upper upper edge of the receiving rail 3 when the wheels pass from one rail 3 to the other. . Practically, the wheels pass through the track joint is smooth. This also increases its reliability.

The direct attachment of the rails 3 to the concrete rail base 1 through the two terminals 7 and the bolted joints 8 enables the necessary reliability of the structure to be achieved while simplifying it.

The shape of the terminals 7 allows to further increase the reliability of the structure as the V-shaped support 17 in the concrete channel 18 creates the necessary elasticity of the rail joint in a horizontal direction and thus reduces the dynamic destructive effect of the rolling stock on the rail joint. The positive impact is also due to the thumbs 14 with the elastic teeth 15, which further dampen the oscillations occurring in the rails 3. The slit 16 of the teeth 15 provides a better grip on the heels of the rails 3 and increases the wear resistance of the teeth themselves 15. The site 12 and the groove 13 of the terminal 7 ensure the reliability and functionality of the bolt connection 8.

A similar effect on the structure is also provided by the intermediate insulation pad 2, which, by covering with the U-shaped profile 21, the track rails 1 does not slip at linear extensions of the rails 3. The U-shaped steel plate 22 in the pad 2 gives additional rigidity. The truncated cones 24 of the upper surface 23 provide the vertical elasticity of the rail joint and increase the damping effect.

The glass-filled polyamide insulation insert 6 increases the reliability of the rail joint due to the fact that it has sufficient rigidity to counteract the compressive forces in the linear extension of the rails 3. The material is at the same time plastic, which is why it does not break in the upper loaded part of the insert 6.

When the track base is wooden, the terminal 7 is simplified and the metal smooth base 19 between the track base 1 and the rails 3 redistributes the stresses from the rails 3 over a larger area and provides a reaction similar to the reaction of the concrete track base 1.

Claims (3)

Claims 1. An electrically insulated rail joint consisting of a rail base with an intermediate insulating pad on it, two front rails with an air gap between their foreheads, which are connected and wedged by two C-shaped electrical connections, located on both sides and fixed by cross-bolted joints, with an insulating insert in the air gap between the rails, and two terminals for clamping the heels of the rails fixed by the bolted joints, between the groove walls of each rail and the inner walls of the C-shaped insulation joints have a rubber layer, with a similar rubber layer having on the outer surface of each C-shaped insulation bond, characterized in that the ends of the two rails (3) are laid on the electrical insulation pad (2) of the track rails (1), each of the terminals (7) presses the heel of the respective rail (3) to the insulation pad (2), with the two terminals (7) positioned diagonally on the rails base (1) and fixed directly to it by the bolts compounds (8), at k here the heads (11) of the cross bolts are of D-profile, repeating the profile of the outer wall of the C-shaped insulation connections (4), and the intermediate insulation sub-base (2) is of polyurethane and the insulation insert (6) is glass-filled polyamide, each terminal (7) having a middle upper rectangular platform (12) with a cylindrical hole for the bolt (8) in the middle and a longitudinal groove (13) below it, and on the side of the rail (3) there are several protruding thumbs (14) with elastic teeth (15) with longitudinal slots (16) on their underside, resting in the heel of the rail (3 ), and on the outside there is a V-shaped support (17) placed in a bed (18) on the rail base (1), the terminals (7) being fixed with the bolts (8) directly to the rail base (1). Electro-insulated rail connection according to claim 1, characterized in that when the track base (1) is wooden, it has a smooth metal support (19) attached to it by typhoons (20), such as the lower surface of the terminals (7). ) is smooth and their outer ends are leveled, whereby the screws (8) are screwed directly into the smooth metal support (19). 5. An electrical insulated rail joint according to claim 1, characterized in that the insulating base (2) is provided with a U-shaped profile (21), which comprises the rail base (1) and has a steel plate (22) in it. , the sub-rail surface (23) of the insulating pad (2) consists of a plurality of truncated cones (24).