EP2702206B1 - Heat insulation for railway rails - Google Patents

Description

The invention relates to a thermal insulation for railroad tracks. In particular, the invention relates to a thermal insulation for railroad tracks, which consists of several prefabricated elements.

In order to maintain the functionality of switches for railway traffic in winter, it is necessary to avoid freezing of the rails or points in snow and ice.

It is known to use thermal insulation or thermal insulation to prevent heat loss to the rails when heating the same in winter.

From the publication WO2009 / 109664 A1 a point heating system is known in which the flow and return of a heating cable is covered outside with insulating material. The insulation of the heating cable is done by foaming on site. The rail foot is insulated by means of a prefabricated insulation thermally outwards.

A disadvantage of the thermal insulation of the prior art, however, that they often have only a relatively low mechanical strength, which can lead to problems especially at high speed lines. In addition, maintenance of the point heating system, for example, when disturbances of the heating elements on the switch may be necessary to perform a complicated disassembly and assembly operation of the thermal insulation or insulating, which is associated with a high cost and time.

In DE 44 23 331 A1 In addition, a noise-reducing railway superstructure is described, which has filler which are arranged continuously in the longitudinal direction along the rail web to cover the rail web, wherein the filler to absorb the airborne sound, on its side opposite the rail have a chamber-like shape.

The object of the invention is to provide an effective thermal insulation for railway turnouts, which is easy to assemble and has a high mechanical strength and stability.

The object is achieved by the thermal insulation for railroad tracks according to independent claim 1.

According to the independent claim, an outer insulation element of a thermal insulation for railroad tracks is provided.

According to the invention, a thermal insulation for railroad tracks is provided with at least one inner insulation element and at least one outer insulation element. The inner insulation element and the outer insulation element are shaped so that they can be mounted parallel to each other on a rail track, so that in the assembled state, the Außenendämmelement includes a lateral end portion of the rail foot form fit and longitudinally along the rail both opposite the rail web, with a Distance to the rail web, as well as extends to the bottom of the rail. In this case, the inner insulation element is arranged in the region of the distance between the outer insulation element and the rail web and is held by means of the outer dam element on the rail track.

An advantage of the invention is that due to the modular construction a simple mounting is made possible. Preferably, the outer and inner insulation elements are made of a stable and heat-insulating material.

In a preferred embodiment of the invention, the thermal insulation has a fastening clip for attachment to the outer insulation element and for fixing the outer insulation element to the rail. In this case, the mounting clamp is designed and adapted to the outer profile of the Außendämmelements that it is attachable in a biased state of the outer insulation element. Due to the bias of the mounting clamp, the Außenendämmelement can be fixed when attaching it together with the attached mounting clamp to the rail, by means of a snapping the mounting clamp on the rail to the rail.

Due to the special design of the mounting clamp is advantageously achieved that the mechanical strength and stability is further increased.

In a preferred embodiment of the embodiment of the invention described above, the outer insulation element on the end face of its supernatant over the rail foot on a groove for locking the mounting clamp in the outer insulation element. As a result, a precise pre-assembly of the fastening clip on the outer insulation element, before attachment of the outer insulation element to the rail, is advantageously facilitated.

The outer insulation element preferably has drainage holes on its underside.

In a further preferred embodiment of the invention, the outer insulation element has recesses on both sides in its longitudinal profile on its underside.

In this embodiment, it is advantageously possible for the outer insulation element to cover the largest possible area longest of the railroad track. In this embodiment, the outer damming element preferably has in its longitudinal profile in the middle and upper region a length with which, in the installed state, it projects above a threshold of the railroad track and approaches close to the rail fastening. As a result, the stability and the thermal insulation property are further increased.

Preferably, the outer insulation element has on its underside a length corresponding to a distance between two railway sleepers.

Furthermore, according to one embodiment of the invention, the inner insulation element is designed such that it has an adapted to the rail track and to the outer insulation element cross-sectional profile. In this case, the inner damping element preferably has a cross-sectional profile adapted to the rail track and to the outer damping element such that the inner damping element, on one side of the rail track, extends beyond the region of the rail web, in the installed state of the thermal insulation to a part of the region of the rail head, positively enclosing.

An advantage of this preferred embodiment of the invention is that, in particular due to the positive connection, the stability of the construction in the mounted state is increased even further.

In a further advantageous embodiment of the invention, the inner insulation element in its cross-sectional profile on the side facing away from the rail track in the assembled state of thermal insulation, a recess into which the Außendämmelement is einpassbar, so that in the assembled state, the Außenendämmelement and Innenendämmelement positively connected to each other. As a result, the assembly is further facilitated further and the stability is increased even more, in particular since an enlarged contact surface between the inner insulating element and the outer insulating element is provided due to the positive connection. Furthermore, the risk of possible shaking of the inner insulation element is further reduced or eliminated.

Preferably, the thermal insulation according to the invention on several Innendämmelemente, which are arranged juxtaposed in the assembled state over the entire heated rail length.

In particular, in an advantageous embodiment of the invention, the inner insulation elements are latched together. Particularly preferably, the Innendämmelemente are latched with each other over the entire heated rail length arranged in a row.

In one embodiment of this advantageous embodiment of the invention, an inner damping element has a trapezoidal connection at one end. Further preferably, an inner damping element has at its other end a trapezoidal recess in the shape of the nozzle. Particularly preferred according to the invention, a combined Innendämmelement is provided that at one end has a trapezoidal nozzle and at its other end the trapezoidal recess in the shape of the nozzle.

As a result, a simple pre-assembly of the elements is possible and achieves a particularly high stability.

According to one embodiment of the invention, the thermal insulation according to the invention is designed for use for stock rails of railway turnouts. In particular, the shapes or the cross-sectional profiles of the inner dam element and the outer dam element are adapted to this effect.

The outer insulation element and / or the inner insulation element is preferably formed from a heat-insulating material, in particular from polypropylene. However, the invention is not limited to the use of polypropylene. Instead, other materials that achieve high stability and good thermal insulation can also be used.

Preferably, the outer insulation element is integrally formed.

Further, a railroad rail is provided which is provided with the thermal insulation according to the invention.

For the purpose of mounting the insulation elements, the inner and / or outer insulation element are preferably provided with additional recesses. The heating element of a rail heater may be mounted on the same side as the thermal insulation, or on the opposite side of the rail.

The thermal insulation according to the invention can be advantageously attached to the rail in a simple manner, For this purpose, a prefabricated Außenendämmelement be provided with a mounting clamp, wherein the terminal has a mechanical bias in the patch on the outer element. Furthermore, at least one inner insulation element is applied to the railroad track at its web area, and the clamped Außenendämmelement is pushed onto the rail, wherein a suitable Außendämmelement is used, that in the pushed state, the rail at least on a side rail foot and the inner insulating element positively. The clamp can then snap in because of the mechanical bias on the other side of the rail foot, so that the Außenendämmelement and thereby also the inner insulation are fixed to the rail.

The thermal insulation according to the invention is particularly suitable for keeping cold wind from the rail, so as to maximize the possible temperature difference between the outside temperature, which is often far below zero degrees Celsius in winter, and the rail temperature.

It is provided a thermal insulation, by means of which advantageously contradictory requirements are met. More specifically, a heat-insulating device is provided in which on the one hand a good Thermal insulation is ensured due to a low thermal conductivity. Furthermore, a good mechanical strength and stability is given, which is especially necessary for high-speed lines. In addition, a simple manner of attachment is provided, whereby a simple maintenance is ensured especially in case of disturbances on the heating elements. This is achieved in particular due to the modular design of the thermal insulation according to the invention, be used in the prefabricated parts.

As will be readily apparent to one skilled in the art, the embodiments and embodiments of the invention set forth above may be appropriately combined.

• Fig. 1 eine Querschnittsansicht eines Außendämmelements eines Ausführungsbeispiels der Erfindung in einem auf der Schiene montierten Zustand,
• Fig. 2 eine Seitenansicht des erfindungsgemäßen Außendämmelements gemäß dem in Fig. 1 gezeigten Ausführungsbeispiel,
• Fig. 3 eine Draufsicht des in Fig. 2 gezeigten erfindungsgemäßen Außendämmelements,
• Fig. 4 eine perspektivische Ansicht des in Fig. 2 gezeigten erfindungsgemäßen Außendämmelements,
• Fig. 5 eine Querschnittsansicht des erfindungsgemäßen Innendämmelements im auf der Schiene montierten Zustand, gemäß dem Ausführungsbeispiel der Erfindung,
• Fig. 6 eine Seitenansicht des erfindungsgemäßen Innendämmelements gemäß dem Ausführungsbeispiel aus den Fig. 1 und 5,
• Fig. 7 eine perspektivische Ansicht des in Fig. 6 gezeigten erfindungsgemäßen Innendämmelements,
• Fig. 8 eine perspektivische Darstellung der erfindungsgemäßen Wärmedämmung im montieren Zustand gemäß dem Ausführungsbeispiel der Erfindung,
• Fig. 9 eine Seitenansicht der erfindungsgemäßen Wärmedämmung im montierten Zustand gemäß dem Ausführungsbeispiel der Erfindung,
• Fig. 10 eine perspektivische Darstellung der Innendämmelemente im montierten Zustand gemäß dem Ausführungsbeispiel der Erfindung, und
• Fig. 11 Querschnittsdarstellungen der Eisenbahnschiene und der erfindungsgemäßen Wärmedämmung während verschiedener Schritte der Montage der Wärmedämmung.

In the following an embodiment of the invention will be explained in more detail with reference to the accompanying figures. Show

• Fig. 1 FIG. 4 is a cross-sectional view of an outer dam element of an embodiment of the invention in a rail mounted condition; FIG.
• Fig. 2 a side view of the Außenendämmelements according to the invention according to the in Fig. 1 shown embodiment,
• Fig. 3 a top view of the in Fig. 2 shown Außenendämmelements invention,
• Fig. 4 a perspective view of the in Fig. 2 shown Außenendämmelements invention,
• Fig. 5 a cross-sectional view of the Innenendämmelements invention in the rail mounted state, according to the embodiment of the invention,
• Fig. 6 a side view of the invention Innenendämmelements according to the embodiment of the Fig. 1 and 5 .
• Fig. 7 a perspective view of the in Fig. 6 shown Innenendämmelements invention,
• Fig. 8 a perspective view of the thermal insulation according to the invention in the assembled state according to the embodiment of the invention,
• Fig. 9 a side view of the thermal insulation according to the invention in the assembled state according to the embodiment of the invention,
• Fig. 10 a perspective view of the Innendämmelemente in the assembled state according to the embodiment of the invention, and
• Fig. 11 Cross-sectional views of the railroad track and the thermal insulation according to the invention during various steps of mounting the thermal insulation.

In the following detailed description, like reference numerals are used for like components throughout the several figures. In this case, components that have already been explained in previous figures, not explained again to avoid repetition.

In Fig. 1 an outer insulation element 101 of the thermal insulation according to the invention is shown in cross-sectional view in a mounted on the rail 102 state. The rail 102 has a rail head 107, a rail web 103 and a rail foot 104. The outer insulation element 101 has in its cross-section a recess which receives a lateral end region 105 of the rail foot 104. The lower part 106 of the outer dam element 101 extends under the rail foot 104. The outer insulation element 101 has, on its lateral part, a projection 108 which extends with respect to the rail web 103 at a distance 109 from the rail web 103. The distance is intended for the interior insulation element (in Fig. 1 not shown, see below instead). On its lateral end face 110, the outer insulation element 101 has a groove 111 which is provided for receiving a fastening clip (not shown here). Like from the Fig. 1 it can be seen, the lateral end portion 105 of the rail foot 104 is positively encompassed by the Außenendämmelement 101. From the Fig. 1 It can also be seen that the lower part 106 of the outer dam element 101 extends under the rail foot 104 in such a way that the rail foot 104 is positively enclosed by the outer insulation element 101, ie the outer insulation element 101 can reach with its lower part 106 by means of the fastening clip (not shown) the rail 102 are held. The outer insulation element 101 has, on the upper side of its lower part 106, which upper side faces the rail foot 104, a depression 112 which serves for collecting and draining meltwater.

In Fig. 2 is the Außenendämmelement 101 according to the embodiment of the invention shown in side view. The outer insulation element has such a longitudinal profile that its lower part 106 is shorter in comparison to its upper part or the projection 108. In other words, the outer insulation element 101 has recesses 201 in its longitudinal profile. According to Fig. 2 the outer insulation element 101 is designed symmetrically in its longitudinal profile. The length of the lower part 106 is selected according to this embodiment such that the outer insulation element 101 has on its underside 202 a length which corresponds to a distance between two sleepers (not shown here) of the railroad rail 102.

According to the exemplary embodiment of the invention, the outer insulation element 101 is made in one piece and made of a heat-insulating material, preferably of polypropylene.

In Fig. 3 a plan view of the outer dam element 101 is shown. As in Fig. 3 As shown, the lower portion 106 of the outer dam member 101 has a series of drainage holes 301 for draining meltwater.

In Fig. 4 is the Außenendämmelement 101 according to the embodiment of the invention in a perspective view shown. In Fig. 4 For example, the lower portion 106, the supernatant 108, the groove 111, the drainage holes 301, and others are also shown earlier in FIGS Fig. 1 to 3 shown in more detail components and aspects of the Außennämmelements 101 shown.

In Fig. 5 FIG. 12 shows a cross-sectional view of an inner dam element 501 of the embodiment of the thermal insulation according to the invention in the state mounted on the rail 102. According to the exemplary embodiment, the inner insulation element 501 has a cross-sectional profile adapted to the rail track 102 and encloses the rail 102, on a side 503 of the rail 102, from a region on an upper side 504 of the rail foot 104, over the region of the rail web 103, up to one Area on a bottom 505 of the rail head 107, in a form-fitting manner. As in Fig. 5 shown, the Innenendämmelement 501 in its cross-sectional profile on a recess 502, so that the cross section of the Innenendämmelements 501 to the cross section of the in the FIGS. 1 to 4 shown Außenendämmelements 101, more precisely to the Cross-section of the supernatant 108 of the Außenendämmelements 101 is adjusted. It is thus achieved that the outer insulation element 101 and the inner insulation element 501 connect to one another in a form-fitting manner. Such a construction on the one hand a simple installation, on the other hand achieved a high stability.

As in Fig. 6 shown, the Innendämmelement 501 according to the embodiment at one end 601 a trapezoidal nozzle 602 and at its other end 603 a trapezoidal recess 604 in the form of the nozzle. This allows a secure latching of several juxtaposed similar Innenendämmelementen 501 in a simple manner.

In Fig. 7 is that in the Fig. 5 and 6 shown Innenendämmelement 501 shown in a perspective view.

In Fig. 8 is a perspective view of the thermal insulation 100 according to the invention shown in the assembled state. Here are in Fig. 8 both the rail 102, on which the thermal insulation 100 is mounted, as well as exemplified two rail sleepers 801 and rail fasteners 802 shown. In Fig. 9 two juxtaposed Innendämmelemente 501 can be seen. The Innenendämmelemente 501 are held according to the installation of thermal insulation of Außenendämmelementen 101 on the rail. The elements 101, 501 of the thermal insulation 100 are fixed to the rail 102 with clamps or fastening clamps 803.

According to the invention, both the inner insulation elements 501 and the outer insulation elements 101 contribute to the thermal insulation. Thus, in particular, cold wind is prevented from the rail 102 by means of the outer insulation elements 101. This applies in particular also to the exemplary embodiment of the invention discussed here.

In Fig. 9 is a perspective view of the embodiment of the thermal insulation 100 according to the invention shown in the assembled state. The exterior insulation elements are sufficient, as in Fig. 9 shown, with their end surfaces 901 almost zoom up to the mounting brackets 902 of the rail attachment 802, so that the cover of the rail 102 with the inner insulation elements 501 and the outer insulation elements 101 is maximized.

In Fig. 10 is a perspective view of the Innendämmelemente 501 shown in the assembled state. According to the embodiment of the invention, the inner insulation elements 501, as in Fig. 10 represented by the trapezoidal mounting stub 602 verklinkt together juxtaposed, arranged adjacent to the rail.

In Fig. 11 It is shown how the thermal insulation (100) according to the embodiment can be mounted. For installation, the outer insulation element 101 according to the invention is provided with a fastening clip 803 placed thereon. The fastening clip 803 has at one end a bent portion 1101 which is adapted to engage the groove 111 at the end face of the projection 108. The fastening clip 803 is preassembled on the outer insulating member 101 of the thermal insulation 100 outside the rail system, with the bent portion 1101 of the fastening clip 803 being inserted into the groove 111 serving as the guide groove for the fastening clip 803. By the force of the springback, the fixing bracket 803 is fixed to a side end surface 1102 of the lower part 106 of the outer dam member 101. The outer insulation element 101 with the fastening clip 803 is inserted until it collides with the inner insulation element 501, as indicated by the arrow 1103 in FIG FIG. 11 indicated. For the final fixing of the thermal insulation 100 on the rail 102, the fastening clip 803, as indicated by the arrows 1104, strongly pressed in, so that the fastening clip 803 snaps, see the arrow 1105th

LIST OF REFERENCE NUMBERS

100

thermal insulation

101

Außendämmelement

102

Railroad track

103

rail web

104

rail

105

lateral end region of the rail foot

106

lower part of the outer dam element

107

railhead

108

upper part of the outer dam element

109

Distance between outer insulation element and rail web

110

lateral end face of the outer dam element

111

groove

201

recess

202

Bottom of the outer dam element

301

drainage holes

501

Innendämmelement

502

recess

503

Side of the rail

504

Top of the rail foot

505

Bottom of the rail head

601

End of the interior dam

602

Support

603

End of the interior dam

604

recess

801

cross tie

802

rail fastening

803

mounting clamp

901

End face of the outer dam element

902

Mounting bracket for railway track

1101

curved section of the mounting clamp

1102

Side surface of the outer dam element

1103

Reinfügevorgang when mounting the Außendämmelements

1104

Reindrückvorgang when attaching the mounting clamp

1105

Snapping the mounting clamp

Claims (15)

1. Heat insulation (100) for railway rails (102), having at least one inner insulating element (501) and at least one outer insulating element (101), which are shaped in order to be mounted lying parallel to each other on a railway rail (102), characterized in that, in the mounted state, the outer insulating element (101) surrounds the rail foot (104) at a lateral end region (105) of the rail foot (104) in a form-fitting manner and extends with an upper part (108) in the longitudinal direction along the railway rail (102) in relation to the rail web (103), at a distance (109) from the rail web (103), and with a lower part (106) on the lower side of the railway rail (102), and the inner insulating element (501) is arranged in the region of the distance (109) between the outer insulating element (101) and the rail web (103) and is held on the rail track (102) by means of the outer insulating element (101).
2. Heat insulation (100) according to Claim 1, furthermore with at least one fastening clamp (803) which is formed for attaching to the outer insulating element (101) and for securing the outer insulating element (101) on the railway rail (102), wherein the fastening clamp (803) is adapted to the outer profile of the outer insulating element (101).
3. Heat insulation (100) according to Claim 2, wherein the outer insulating element (101) has a groove (111) on the end surface of the excess length (108) thereof over the rail foot (104) for latching the fastening clamp (803) into the outer insulating element (101).
4. Heat insulation (100) according to one of the preceding claims, wherein the outer insulating element (101) has drainage holes (301) on its lower side.
5. Heat insulation (100) according to one of the preceding claims, wherein the outer insulating element (101) has, on its lower side, a recess (201) in each case on both sides in its longitudinal profile.
6. Heat insulation (100) according to one of the preceding claims, wherein the outer insulating element (101) has, on its lower side, a length which corresponds to a distance between two railway sleepers (801) on which the railway rail (102) is fastened.
7. Heat insulation (100) according to one of the preceding claims, wherein the inner insulating element (501) has a cross-sectional profile adapted to the railway rail (102) and to the outer insulating element (101), wherein, in the mounted state of the heat insulation (100), the inner insulating element (501) is surrounded by one side of the railway rail (102) in a form-fitting manner, wherein the inner insulating element (501) lies against the railway rail (102) from a region of the upper side (504) of the rail foot (104), over and beyond the region of the rail web (103) as far as a region (505) of the rail head (107).
8. Heat insulation (100) according to one of the preceding claims, wherein the inner insulating element (501) has, on its side which faces away from the railway rail (102) in the mounted state of the heat insulation (100), a recess (502) into which the outer insulating element (101) can be fitted, and therefore, in the mounted state, the outer insulating element (101) and the inner insulating element (501) are connected to each other in a form-fitting manner.
9. Heat insulation (100) according to one of the preceding claims, having a plurality of inner insulating elements (501) according to the preceding claims, which are latchable to one another.
10. Heat insulation (100) according to Claim 8, wherein the inner insulating element (501) has a trapezoidal connecting piece (602) at one end (601) and a trapezoidal recess (604) in the shape of the connecting piece (602) at its other end (603).
11. Heat insulation (100) according to one of the preceding claims, wherein the outer insulating element (101) and/or the inner insulating element (502) are each formed from a heat-insulating material, in particular from polypropylene.
12. Heat insulation (100) according to one of the preceding claims, wherein the outer insulating element (101) is formed in one piece.
13. Railway rail (102) with at least one heat insulation (100) according to one of the preceding claims mounted thereon.
14. Use of a heat insulation (100) according to one of Claims 1 to 12 for stock rails of railway points.
15. Method for mounting an outer insulating element (101) of a heat insulation (100) for railway rails (102), according to one of Claims 1 to 12, comprising the following steps:

    providing the outer insulating element (101) with a fastening clamp (803), wherein the fastening clamp (803) has a mechanical prestress in the state placed onto the outer insulating element (101),

    pushing the outer insulating element (101) provided with the fastening clamp (803) onto the railway rail (102) such that the outer insulating element (101) surrounds the railway rail (102) at the lateral rail foot region (105) in a form-fitting manner,

    snapping (1105) the fastening clamp (803) over the other side of the rail foot (104) with the use of the mechanical prestress of the fastening clamp (803) such that the outer insulating element (101) is secured on the railway rail (102),

    wherein the outer insulating element (101) is furthermore configured in order, in the mounted state, to hold an inner insulating element (501), which lies against the railway rail (102) in the web region thereof, on the railway rail (102).

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