WO2009084939A1

WO2009084939A1 - Solid rail bi bond (srbb) railway turnout

Info

Publication number: WO2009084939A1
Application number: PCT/MY2007/000092
Authority: WO
Inventors: Padmanabha R.P. Rajan
Original assignee: Rajan, Suma; Rajan, Basant; Rajan, Biswas
Priority date: 2007-12-31
Filing date: 2007-12-31
Publication date: 2009-07-09

Abstract

The invention relates to innovation of railway turnout to avoid many aspects of unsafe condition dangerous to comfortable railway locomotion. The area marks as (2, 4 and 5) in figure 1 are really vulnerable beyond rectification. Other items marked 6 and 7 in figure 1 are avoidable if the proposed innovation is implemented as shown in figure 4 generally and figure 5 and in figure 6 particularly.

Description

SOLID RAIL BI BOND (SRBB) RAILWAY TURNOUT

FIELD OF THE INVENTION

The invention relates to the Railway Turnouts, in particular this invention relates to innovation of a Railway Turnout more efficiently without the nose and the switch blades, the most vulnerable parts and introducing solid rail of full section throughout. More over this innovation provides full transition curve to enable comfortable entry and exit of railway vehicles.

BACKGROUND ART

In any railway system all over the world the device of branching out a track from the main track or joining into a main track is taking place through a turnout. The most important parts of a turnout are the nose and the switches. These parts are generally cut, spliced and bolted or sometimes welded together at great precision. Still those parts are the most vulnerable points in a turnout being the sharpest and thinnest part of turnout carrying the full load applied. Especially in the case of switches where the thinness extends for longer length the maintenance risk is very high. Moreover when a point machine is attached to the flimsy rail tip the operation risk is also multifold. To cutout such switches from the rail is a laborious job. The final product remaining under use is comparatively thinner component to be strengthened with extra fittings.

In the case of the nose point in whatever design, a gap is formed where the wheel flange has to pass over without continuous support and taken over by a narrow pointed nose which is only a decimal fraction in thickness of the wheel flange. To counteract all these defects many devices such as wing rails, guard rails and numerous fittings are to be added to the nose assembly. All these efforts, care and extra materials are required to achieve an effective and technically advanced locomotion for the maximum safety and comfort. SUMMARY OF THE INVENTION

It is an object of invention to provide an effective alternative device avoiding such vulnerable parts of sharp and flimsy section of the rail and providing a full cross section of solid rail bi-bond. An added innovation introduced in this bi-bond is the curve involved in this which is perfectly transitioned for comfortable entry and exist of the rolling stocks.

Turnouts are of two types such as right hand & left hand. All the drawings attached here for description are shown as right hand. The mirrored view of these drawings can be taken as the left hand type. The nose assembly is natural & same for right & left.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 : illustrates the profile of a conventional turnout Figure 2 ; illustrates the innovated profile of the turnout set for straight passage Figure 3 : illustrates the innovated profile of the turnout set for the deviated passage of entry & exit. Figure 4 : illustrates the innovated portion of switches and nose. Figure 5 : illustrates the noseless crossing of solid rail.

Figure 6 : illustrates the bladeless switch device of solid rail.

DETAILED DESCRIPTION OF THE DRAWINGS

Figure 1 : shows the conventional type of turnout. The beginning of the turnout is marked as 1. The two vulnerable switch points are numbered as 2. The end of blades are 3. The blades from 2 to 3 on both sides are movable. Another vulnerable point nose is 4. The gap formation is marked as 5. The extra wingrails for the protection are shown as 6. Additional guard rails numbered as 7 are attached to the stock rails 8. The ends of turnout are 9 & 10.

Figure 2 : shows the innovation avoiding pointed switches and nose and replacing with solid rails of full section. In any turnout there are two kinds of movements being straight and deviated. In this figure the straight passage alone is shown for clarity. The beginning of the turnout is marked as 1. No. 2 is potential tangent Point. From the points 1 to 2 both rails are fixed firmly on sleepers. From 2 to 3 a rail joint, even though straight in this position is capable to swing to a required radius and moves from 4 to 5. Similarly the other rail 2 to 6 is arranged to swing from 7 to 8 simultaneously. The rails 5 to 9 and 7 to 10 are fixed. The rails 11 to 13 and 12 to 14 are fixed together and 13 and 14 are hinged points so that points 11 and 12 are movable together. The connection is always 10 to 11 and 9 to 12. The ends of turnout are at 15 and 16. The position of the rolling stock is shown as 17.

Figure 3 : shows the movements of the rolling stock on the deviated path. The numberings in this figure are given as exactly as in figure 2 and description are the same. Only the rolling stock marked 17. is placed on the other path.

Figure 4 : Shows the final innovation and the implementation method. The moving parts are well protected from possible expansion problems by boxing mechanism. The boxes 1 and 2 are very similar except the radius being short by the gauge for the inner rail. The shape of box will change along with the side change of turnouts. The box no 3 of the crossing is the same for the right and left turnouts.

The firm lines in this figure denote the straight passage and the dotted position denoted for the deviated passage.

Figure 5 : Shows the solid rails vividly in the place of the pointed nose, the innovative idea. The numbering is given in comparison with the numbering in figure

2 showing the connection of 10 with 11 and 9 with 12 and 13 and 14 are hinged to enable the turning movement. Here the moving rails are always straight in position. Figure 6 : Shows the replacement of a pointed switch blade with a solid rail of full section the purpose of the innovation. The numbering follows the same as in Figure 2 being 1 as the turnout limit and 2 as the beginning of curve. Point 3 is a shifting point to either 4 or 5 accordingly.

The core innovation of replacing the thin and sharp switch blade with a solid rail of full section is clearly shown as the position of the rail 2 to 3 in a required transition curve form for the deviated passage as shown in figure 3 and all the other time it will be on a straight alignment for the straight passage as shown in figure 2.

Claims

1. The railway turnout system to avoid the Vulnerable points of the 2 tips of thin switch blades marked 2, along with the blade up to 3, the nose point 4, the unsupported gap 5, the wing rails 6, the guard rails 7, as shown in figure 1 and to replace with solid rails of full cross section throughout, as shown as crossing rails 11 to 13 and 12 to 14 in figure 5 and switch rails 2 to 3 and 2 to 6 in figure 3 enlarged as 2 to 3 in figure 6, for a complete innovation.

2. The railway turnout system claim 1 is applicable for both types of right hand and left hand turnouts and for all sections of rails and in any angle of the crossings.