ES1065079U - Resilient rail support block assembly - Google Patents

Abstract

Prefabricated elastic element (1) for a set of rail support block, whose assembly is adapted to be mounted inserted or mounted on a track substructure (25) and whose assembly comprises said elastic element (1), as well as a block (10) having an upper part, a bottom and a peripheral wall, said block being adapted to hold one or more rails (20) on the upper part of said block, the prefabricated elastic element (1) being adapted to be fixed to said block to extend under said bottom of the block, as well as around at least a lower area of the peripheral wall of the block, characterized in that said precast elastic element (1) comprises an external tray (2) and an internal tray (3) arranged inside said external tray, and by the fact that said prefabricated elastic element (1) comprises an elastic intermediate structure (5) arranged between said external trays and internal (2, 3). (Machine-translation by Google Translate, not legally binding)

Description

Elastic element prefabricated for a set of rail support block.

The present invention relates to the field of  support rails of a railway track, such as for trains, meters, trams, etc.

Background of the invention

In the field of track technology rail systems have been developed to reduce difficulties, in particular noise and vibration.

In a known arrangement a track rail of railway is supported on rail support blocks arranged at intervals under the rail. These blocks are inserted in a concrete slab. The slab is usually poured around the blocks, but it is also known to place the blocks in corresponding cavities in a slab. To reduce the noise and vibrations resulting from rail vehicles an elastic element is present on the track between each block and the slab.

In a known system developed by the present applicant is manufactured a support block assembly of elastic rails, which is ready to be mounted on the rail that has been of enduring The set includes an adapted concrete block to hold the rail over the top of the block. This set also includes a concrete tray that extends below and separated from the bottom of the block, as well as around and separated from the lower part of the peripheral wall of the block. A elastic material, such as sold under the trade name Corkelast, has been poured during the manufacture of the set of the concrete tray and the block. When polymerized (while maintains its elastic property) the elastic material adheres to the concrete block and concrete tray and thus joins said tray  to the block When a rail is installed, the block assemblies of Rail support are placed at intervals along the rails and they are subject to them. Subsequently a slab of concrete, so that the concrete trays are inserted and They become solidarity with the slab. This procedure is known in the technique with the name of "fixing procedure and forget ".

For the installation of a long section of track, requires a very large number of these block sets of track support. Due to its weight it is preferred to organize the manufacture of the assemblies in a factory for products of concrete construction located relatively close to the place of railroad installation. In practice, this approach is faces difficulties in manufacturing the sets of track support block. In particular, it has been found difficult establish reliable quality of the assemblies, especially regarding the adhesion of the components in the set known. In detail, it has been difficult to control the adhesion between the concrete block, the concrete tray and the elastic material that can be poured, since stages are required pre-treatment faces, for example of the surfaces of concrete.

This adhesion is considered important by part of the applicant, since during his service life the elastic material of the set is subjected to compressions and cyclic relaxations If the adhesion deteriorates and fails completely, the block is as if it had "separated" from the slab. This is considered undesirable, since then the own Rail would no longer be connected to the slab in a satisfactory manner. In addition, water, fuel or other liquids may enter between components that are no longer (sufficiently) attached and will cause a "pump action" at each step of a rail vehicle. This causes discomfort of noise and vibration, and also causes wear and damage that must then be resolved with activities of maintenance.

EP-0 919 666 describes a system in which a rail support block is placed in a prefabricated tray, for example plastic or concrete. The tray is adapted to be inserted into the slab of concrete. Elastic elements are arranged in the tray, in particular between the tray and the bottom of the block and between each face side of the tray and the opposite side of the block. The attachement of the tray with its elastic elements to the block is based on the clamping forces created by a previous compression of the elastic elements through the block when placed in the tray.

In this system known from the document EP-0 919 666 is expected that the block can be removed of the tray inserted in the slab to replace the block, by example when damaged. This withdrawal can be done simply by lifting the block out of the tray. To avoid the water inlet or similar between the tray and the block are proposed a plurality of alternative solutions, including the discharge of a silicone filler material in the spaces between the block and the tray with its associated elastic elements that support the block.

Description of the invention

The present invention has as its purpose propose one or more measures to obtain a set of Enhanced elastic track support block.

The present invention provides an element prefabricated elastic for a support block assembly of rails, whose assembly is adapted to be mounted inserted or mounted on a track substructure and whose assembly comprises said elastic element as well as a block that has a top, a bottom and a peripheral wall, said block being adapted to  hold one or more rails on top of said block, the prefabricated elastic element being adapted to be fixed to said block to extend under said block bottom, as well as around at least one lower area of the peripheral wall of the block.

According to the invention, the element prefabricated elastic comprises an external tray and a tray internally arranged inside said external tray, and said prefabricated elastic element also comprises a structure elastic intermediate that is arranged between said trays external and internal

An advantage provided by the elastic element  according to the invention is that the manufacture of said element is can be done by a company specialized in a controlled environment. In this way, you can ensure a perfect elastic element quality. The procedure stage of creation of adhesion between the inner tray and the block is finds that it is less complicated and sensitive than adhesion described above between the elastic material that can be pouring and concrete components, as described with reference to the set of prior art of the applicants. Therefore, such adhesion can be made at the site of the concrete block production or even at another site (for example on the installation site of the track).

Advantageously, said internal trays and External are more rigid than the intermediate elastic structure.

These internal and external trays have each a bottom and a raised peripheral wall.

In addition, the external and internal trays are separated from each other so as not to have any point of contact.

Said elastic intermediate structure preferably it is essentially composed of a material elastomeric, for example an elastomeric material of polyurethane.

Advantageously, said external tray has a outer surface, said outer surface being provided with anchor formations to improve tray coupling External with a concrete slab.

Preferably, said external trays and Internal are made of a plastic material.

These external and internal trays are formed  from a sheet material, preferably sheet material plastic.

The rail support block assembly elastic is adapted to be mounted inserted or mounted on a track substructure, said set comprising the element elastic of the invention, as well as a block having a part upper, a bottom and a peripheral wall, said said being adapted block to hold one or more rails on said block, and being fixed the prefabricated elastic element to said block for extend under said block bottom, as well as around by at least one lower area of the peripheral wall of the block.

Said prefabricated elastic element is fixed  to said block with an adhesive or mortar.

Brief description of the drawings

The invention will be described in greater detail at continued with reference to the drawings. In the drawings:

Figure 1 shows an example of a block of track support and an example prefabricated elastic element according to the invention;

Figure 2 shows an assembly according to the invention composed of the block and the elastic element of the figure 1, said elastic element being fixed to the block;

Figure 3 shows a rail provided with assembly of figure 2 before inserting a concrete slab; Y

Figure 4 shows the rail of Figure 3 with the set inserted in the concrete slab.

Description of a preferred embodiment

Figure 1 shows an example of a prefabricated elastic element 1, which is specially adapted for integration into a support block set of rails

In the embodiment shown, here the element prefabricated elastic 1 has an external tray 2 and a tray internal 3 arranged in said external tray 2.

Trays 2, 3 here generally have a bottom, here a rectangular bottom, and an elevated peripheral wall and They are open below.

Inner tray 3 has dimensions of so that it can be kept separate from external tray 2 in All directions In practical terms, this distance between the main faces of the internal and external trays 2, 3 it is generally preferably at least 5 millimeters and preferably at most 20, more preferably at most 15 millimeters

An elastic intermediate structure 5 is arranged between said external and internal trays 2, 3. Said structure 5 here also interconnects said trays 2, 3 to forming a unit assembly with said trays, preferably when joining said structure 5 with the faces of each of the trays 2. 3.

Here, in a preferred embodiment, the elastic structure 5 has been obtained by placing the trays 2, 3 separated from each other and then pouring (or similar) a suitable elastomeric material between the trays external and internal 2, 3. When pouring (or similar) the material between the trays 2, 3 the material essentially joins all faces main internal and external trays 2, 3, preferably so that there is no interface that could allow the water inlet or similar.

The elastic intermediate structure 5 thus serves to interconnect the trays 2, 3 to form an element prefabricated elastic unit 1 and also to provide a support for attenuation of sound and / or vibrations of block 10 when the assembly is inserted in a slab or is mounted on Other substructure

The external and internal trays 2, 3 are separated from each other to have no contact point and layer elastic intermediate 5 allows the elastic movement of the tray internal (which will host the block) in all directions.

Here, as preferred, the internal trays and External 2, 3 are more rigid than the intermediate elastic structure 5.

In practice, trays 2, 3 can be of materials such as plastic, reinforced plastic (with fiber), metal, or even wood. Plastic material and trays are preferable 2, 3, for example, may be injection molded or, if prefers to be formed from plastic sheet material.

The elastomeric material of structure 5 and of  Trays 2, 3 is preferably designed and selected from so that a strong adhesion or bond between the faces is obtained internal trays and elastomeric material. For example, him  elastomeric material may be a polyurethane elastomer, such such as Corkelast made by the applicant.

In general, Figure 1 shows an element prefabricated sandwich type elastic, in which a layer of elastomeric material 5 is interposed between the trays 2, 3.

The elastic intermediate structure 5, here the layer of elastomeric material 5, is adapted to maintain its elasticity during its service life. For example, said structure 5 (and the elastic assembly in which it is integrated) have of being able to serve on track lines as specified in the code UIC 700, "Classification of lines and resulting load limits for wagons ", a relevant code of the International Union of Tracks.

The inner faces of the trays 2, 3 are preferably made with an adhesion enhancing surface, for example, rough as in the drawings, and / or provided with adhesion enhancement formations, such as nerves, handles, etc.

The internal faces of the trays 2, 3 are they can undergo a previous treatment of adhesion improvement, for example a mechanical treatment or a chemical treatment.

Trays 2, 3 can be made from from the same or from different materials. For example, the internal tray could be made from plastic and the external metal tray. The external metal tray would cause high resistance against damage and / or tray penetration external possibly affecting the operation of the material elastic. An external tray, for example of steel, could also  be chosen as it could allow mounting or integrating the tray into a steel structure, for example in a steel plate or in a Steel element of a track bridge or similar. External tray steel could be provided, for example, with a flange that can be attached to said other steel structure.

Also the wall thickness of the trays 2, 3 could be the same or different, for example depending on the Selected material and / or application.

Trays 2, 3, or one of them, could be made from an electrically insulating material. The intermediate elastic structure 5 could also have properties electrically insulating.

It can also be expected that one or more elements preformed elastics, for example a carpet or elastic plate (for example of a suitable foam), be placed between the trays 2, 3 and possibly attached to the two trays using a suitable adhesive.

The use of one or more flexible foam elements  preformed between the funds of the trays is expected, by example, to obtain a softer support of the or rails

When one or more elastic elements are used preformed between the trays, any remaining space between Trays 2, 3 is filled with an elastomeric material that can pour, as explained with respect to structure 5 in figure 1.

Figure 1 also shows an example of a support block for tracks 10. This block 10 is made here of a material that can be poured into a suitable mold at a site of production. Preferably, block 10 is made of concrete. It is envisioned that said concrete may be a polymer concrete. Other embodiments containing block concrete, for example which include reinforcement materials, are also provided. He block could also be made of other materials, such as to starting from steel, for example a molten block or a steel block soldier.

Block 10 has a top, a bottom and a peripheral wall. Here block 10 is adapted as a monobloc to support a single rail of a railroad track, but the block could also be designed as a double block that withstand two or even more rails (such as a naughty for tracks). Block 10 here has a significant height.

To fasten the rail to the top 11 of the block 10 are provided one or more rail fasteners 15 in block 10. Also an elastic plate 16 is placed here on block 10, which will be placed under the rail.

Figure 2 shows that block 10 has been  placed in the internal tray 3 of the elastic element prefabricated 1. It is shown here that the top of block 10 it is vertically separated from the upper edge of the trays 2, 3.

Figure 2 also shows that the block 10 has been fixed here in the internal tray 3, as preferred, by applying a suitable adhesive 17 between the tray internal 3 and block 10. This adhesive preferably hardens to be rigid in a hardened condition, thus doing the internal tray 3 a unit body with block 10. These adhesives are known in the art and, for example, are sold under the trade name DEX.

It should be noted that the internal dimensions of the internal tray 3 is preferably selected to have in count any variation of the dimensions of block 10 as result of the block production procedure.

Figure 3 shows that the whole of the Figure 2 is mounted on a rail 20 to be installed. In the practice, said rail 20 is maintained in its desired position by temporary supports

In Figure 4 a slab of concrete or asphalt 25 under rail 20 to insert the element elastic 1 on slab 25. To improve tray insertion external 2 on the slab 25, the external tray 2 can have a rough exterior and / or anchor formations (for example, nerve (s), handle (s), pins or pins, which protrude out of tray 2).

It is also planned to have external tray 2 with a peripheral wall inclined towards the interior or parts of the same, so that the inserted external tray cannot be stretch up out of the slab.

A tray could be provided with one or more perforations

In an embodiment not shown, the set it is not inserted, but fixed on a substructure, for example a substructure plate (metal or concrete) or a beam.

Claims (8)

1. Prefabricated elastic element (1) for a rail support block assembly, whose assembly is adapted to be mounted inserted or mounted on a substructure of track (25) and whose assembly comprises said elastic element (1), thus as a block (10) that has a top, a bottom and a peripheral wall, said block being adapted to hold one or more rails (20) on the top of said block, being adapted the prefabricated elastic element (1) to be fixed to said block to extend under said block bottom, as well as around at least one lower area of the peripheral wall of the block, characterized in that said prefabricated elastic element (1) comprises an external tray (2) and an internal tray (3) arranged inside said external tray, and by the fact that said prefabricated elastic element (1) comprises an intermediate elastic structure (5) disposed between said external and internal trays (2, 3). 2. Elastic element according to claim 1, characterized in that said internal and external trays (2, 3) are more rigid than the intermediate elastic structure (5). 3. Elastic element according to claim 1 or 2, characterized in that said internal and external trays (2, 3) each have a bottom and a raised peripheral wall. 4. Elastic element according to one or more of the preceding claims, characterized in that the external and internal trays (2, 3) are separated from each other so as not to have any contact point. 5. Elastic element according to one or more of the preceding claims, characterized in that said elastic intermediate structure (5) is preferably essentially composed of an elastomeric material, for example an elastomeric polyurethane material. 6. Elastic element according to one or more of the preceding claims, characterized in that said outer tray (2) has an outer surface, said outer surface being provided with anchoring formations to improve the coupling of the outer tray with a slab of concrete. 7. Elastic element according to one or more of the preceding claims, characterized in that said external and internal trays (2, 3) are made of a plastic material. 8. Elastic element according to one or more of the preceding claims, characterized in that said external and internal trays (2, 3) are formed from a sheet material, preferably plastic sheet material.