KR101452937B1 - Rail for railroad - Google Patents

Abstract

The present invention discloses a railway rail having a noise abatement assembly capable of reducing vibration and noise generated when a railway vehicle runs. The railway rail according to the present invention comprises first and second flange portions extending in a horizontal direction and in opposite directions to each other at a head portion, first and second web portions formed at both sides under the first and second web portions, And at least one surface of the web portion is fixedly mounted with a plurality of fixing clips by the noise reducing assembly. Here, the noise reduction assembly used in the present invention includes: a damping sheet closely attached to a surface of a web portion; A vibration absorber closely attached to an outer surface of the damping sheet; A sound absorbing body located outside the vibration absorbing body; And a vibration-damping steel plate disposed on the outer side of the sound absorbing body, and is fixedly supported by the fixing clip on the web portion. The elastic clip is made of a metal material having excellent elasticity, and is divided into a first portion corresponding to the web portion, a second portion corresponding to the lower portion of the flange, and a third portion opposed to the first portion and corresponding to the tip of the flange. The first portion and the second portion of the elastic clip are at an angle so that the first portion is subjected to an elastic force directed toward the second portion and the tip of the first portion is in contact with the damping steel plate as the outermost member of the noise reduction assembly, A curved portion is formed at the boundary between the third portion and the second portion so that the side end portion of the flange portion is accommodated in the curved portion.

Description

Rail for railroad

The present invention relates to a railway rail, and more particularly, to a railway rail having a structure capable of reducing radiated noise by reducing generated vibration.

Generally, the railway rail is mounted on the sleeper by the fastening member. Timber or concrete sleeper fixes railway rails and keeps them constantly between orbits and at the same time distributes the load of the train to the railway railway.

1 is a view showing a mounting state of a general railroad rail in which a railroad track 1 (concrete or gravel) is provided with a railroad tie 1 and a fastener 2 fixed to the railroad tie 1, 3 are fixed to the sleepers 1.

The plate 5 on which the engaging holes 4 are formed is mounted on the left and right sides of the rail rail 6 in a state of being associated with the upper plate member 3. The second end of the fixing clip 7 whose first end is inserted and fixed in the engaging hole 4 is mounted on the flange portion 6a of the rail rail 6 to mount the rail rail 6 on the upper plate member 3. [ So that the railway rail 9 is fixed to the sleeper 1 through the top plate member 2. [

As described above, when the railway vehicle runs along the railway rail 6 mounted on the sleeper 1, rolling noise occurs due to the rotation of the metallic wheel of the railway vehicle, and the rolling noise of the wheel and the railway rail 6 Vibration and squeal noise are generated at the contact portion.

Thus, the noise and vibration generated when the railway vehicle is traveling are transmitted to the inner space (room) of the vehicle and the residential area near the railway line, thereby causing severe noise pollution.

An object of the present invention is to provide a railway rail having a noise reduction assembly capable of reducing vibrations and noise generated when a railway vehicle runs.

According to an aspect of the present invention, there is provided a railway rail including a head portion, first and second web portions formed at both lower sides thereof, and first and second web portions extending in a horizontal direction and in opposite directions to each other at a lower end of the first and second web portions, And a second flange portion, wherein at least one surface of the web portion is fixedly mounted with a plurality of securing clips by a plurality of securing clips.

Here, the noise reduction assembly used in the present invention includes: a damping sheet closely attached to a surface of a web portion; A vibration absorber closely attached to an outer surface of the damping sheet; A sound absorbing body located outside the vibration absorbing body; And a vibration-damping steel plate disposed on the outer side of the sound absorbing body, and is fixedly supported by the fixing clip on the web portion.

The vibration absorber is divided into a first portion positioned at a lower portion of the head portion of the railway rail, a second portion closely contacting the surface of the web portion, and a third portion corresponding to the surface of the flange portion. A bottom surface of the first part and an upper surface of the third part, and the inner side surface of the first part is spaced apart from the second part of the vibration absorbing body to form a predetermined space between the sound absorbing body and the vibration absorbing body.

On the other hand, the elastic clip is made of a metal material having excellent elasticity, and is divided into a first portion corresponding to the web portion, a second portion corresponding to the lower portion of the flange, a third portion opposed to the first portion and corresponding to the tip of the flange .

The first portion and the second portion of the elastic clip are at an angle so that the first portion is subjected to an elastic force directed toward the second portion and the tip of the first portion is in contact with the damping steel plate as the outermost member of the noise reduction assembly, A curved portion is formed at the boundary between the third portion and the second portion so that the side end portion of the flange portion is accommodated in the curved portion.

Here, the vibration absorber may be mounted to the first web portion and the second web portion, respectively, by an elastic clip, wherein the noise abatement assembly has a length corresponding to the space between the sleepers and the sleepers in the region of the web portion, It may have a length.

The railway rail according to the present invention can reduce the vibration and noise generated when the railway vehicle runs.

1 shows a state in which a general rail is mounted on a sleeper;
2 is a sectional view of a railway rail according to the present invention;
Fig. 3 is a view showing a state in which the railway rail shown in Fig. 2 is installed on a sleeper. Fig.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a cross-sectional view of a railway rail according to the present invention.

The rail rail 100 according to the present invention includes a head portion 110, first and second web portions 121 and 122 formed on both lower sides of the head portion 110 and first and second web portions 121 and 122 And first and second flange portions 131 and 132 extending in the horizontal direction and in opposite directions, respectively. The head portion 110 is a portion in contact with a railroad wheel (not shown), and the flange portions 131 and 132 are portions fixed to a sleeper (not shown).

The railway rail 100 according to the present invention is disposed in the first space S1 formed between the head portion 110 and the first web portion 121 and the first flange portion 121 to form the first web portion 121, And a plurality of securing clips 160 for securing the first noise reduction assembly 140 to the first web portion 121. The first noise reduction assembly 140 includes a first noise reduction assembly 140 mounted to the first web portion 121,

The railway rail 100 according to the present invention is disposed in the second space S2 formed between the head portion 110, the second web portion 122 and the second flange portion 122, (Not shown in FIG. 2) for securing the second noise reduction assembly 150 to the second web portion 122, and a second noise reduction assembly 150 mounted on the second web portion 122, .

 The first noise reduction assembly 140 and the second noise reduction assembly 150 have the same members and structure and are arranged symmetrically with respect to the vertical center line of the head portion 110. Therefore, in the following description, only the structure of the first noise reduction assembly 140 will be described by way of example.

The noise abatement assembly 140 includes a damping sheet 141 corresponding to the surface of the web portion 121, a vibration absorber 142 corresponding to the outer surface of the damping sheet 141, And a damping steel plate 144 closely attached to the outer surface of the sound absorbing body 143 and the sound absorbing body 143.

The structure and function of the members constituting the noise reduction assembly 140 will be described separately.

Damping  Sheets (141)

The damping sheet 131 is a member adhered to the surface of the web portion 121 and has a sheet shape of a predetermined thickness.

As the material of the damping sheet 131, isobutylene-isoprene rubber may be used, and an asphalt-based synthetic resin may be used. These materials are applied in the fields of buildings, ships and the like to reduce vibration noise, and attenuation of vibrating structures can be attained by attaching materials having high damping performance to the structures.

When the railway rail 100 vibrates as the rail runs, the damping sheet 141 is repeatedly deformed to dissipate the energy, thereby causing the vibration to occur. (Free surface layer attenuation treatment), and thus the noise caused by this vibration is significantly reduced.

The vibration absorber 142,

The vibration absorbing member 142 adhered to the outer surface of the damping sheet 141 has a predetermined thickness and includes a first portion 142a located at the lower portion of the head portion 110, A second portion 142b corresponding to the surface of the flange portion 131, and a third portion 142c corresponding to the surface of the flange portion 131. [ With this structure, the vibration absorbing member 142 is stably supported on the web portion 121.

The vibration absorber 142 may be composed of various materials and structures. That is, a steel strip and a polymer can be combined to form a vibration absorber, and a structure in which an elastomer is disposed between a plurality of steel plates. At the same time, the vibration absorbing body 142 can be manufactured by mixing the mixture of the steel powder and the polypropylene with the butyl rubber.

The vibration absorber 142 made of the above material functions to reduce the vibration generated in the railway rail, thus reducing the generation of noise due to vibration.

Sound absorbing body (143)

The sound absorbing body (143) is located outside the vibration absorbing body (142). The sound absorbing body 143 is made of a material that absorbs a part of the sound energy hitting the surface and reduces the reflected sound. The material (sound absorbing material) constituting the sound absorbing body is classified into a porous sound absorbing material and a plate sound absorbing material according to its structure.

The porous sound absorbing material has small bubbles or thin pipe-shaped holes formed on the surface and inside thereof. The air in the holes is vibrated by the sound waves, and the sound energy is absorbed by the heat energy because of the friction.

The plate-shaped sound absorbing material is a structure in which a sound wave absorbs sound energy while vibrating the plate. Typical examples of sheet-like sound absorbing materials include a veneer board, a gypsum board, a fibrous board, and an asbestos board.

2, in the railway rail 100 according to the present invention, the sound absorbing body 143 may be installed to be spaced apart from the vibration absorbing body 142 by a predetermined distance. That is, the upper and lower ends of the sound absorbing body 143 are in close contact with the bottom surface of the first portion 142a of the vibration absorbing body 142 and the upper surface of the third portion 142c, 2 portion 142b.

Therefore, an air layer A exists between the sound absorbing body 143 and the vibration absorbing body 142, and this air layer A functions to reduce the noise passing through the vibration absorbing body 142.

The vibration-

A vibration damping steel (vibration damping steel) 144 that absorbs and dissipates vibrational energy is disposed in close contact with the outer surface of the sound absorbing body 143. The inner surface of the upper end portion and the inner surface of the lower end portion of the vibration damping steel 144, And the outer surface of the third portion 142c.

The vibration transmitted to the vibration-damping steel plate 144 through the sound-absorbing member 143 is largely vanished, so that generation of noise due to vibration can be suppressed.

The vibration-damping steel plate 144 is a plate manufactured by applying a viscoelastic resin (acrylic copolymer-based) excellent in vibration damping properties and adhesion between a steel sheet and a steel sheet or between a steel sheet and a dissimilar metal sheet in a continuous process .

When an external force such as noise and vibration is applied to the vibration-damped steel plate 144, the vibration-damped steel plate is vibrated. At this time, the vibration energy is converted into heat energy and the vibration is attenuated. In case of general steel sheet, vibration is externally applied due to its resonance property, whereas vibration-damping steel sheet can obtain vibration damping effect by using viscoelastic polymer material.

The vibration damping properties of the vibration-damping steel sheet are divided into room temperature, middle temperature, and high temperature depending on the type of resin, and exhibit the best vibration damping performance at 25 ° C for room temperature and 60 ° C for high temperature. For the railway rails to be installed outdoors, it is preferable in the present invention to use the room temperature damping steel plate 144 exhibiting excellent vibration damping performance at room temperature.

The structure and function of the elastic clip 160 for fixing the noise reduction assembly 140 thus configured to the web portion 121 will be described with reference to FIGS. 2 and 3. FIG.

The elastic clip 160 is made of a metal material having excellent elasticity and has a sheet shape having a predetermined width. 2, the elastic clip 160 includes a first portion 161 corresponding to the noise reduction assembly 140, i.e., the web portion 121, and a first portion 161 corresponding to the web portion 121, A corresponding second portion 162 and a third portion 163 which faces the first portion 161 and corresponds to the tip of the flange portion 132 on the opposite side.

The first portion 161 and the second portion 162 of the resilient clip 160 are at an angle so that an elastic force is applied to the first portion 161 toward the second portion 162.

The tip of the first portion 161 of the elastic clip 160 contacts the outboard member 145 of the noise reduction assembly 140 so that the noise reduction assembly 140 is directed toward the web portion 121 Lt; / RTI >

Here, the tip of the first portion 161 of the elastic clip 160 is received in a predetermined position of the vibration-damping steel plate 144 of the noise-reducing assembly 140 and the sound-absorbing body 143 closely attached to the vibration- A concave portion 144-1 may be formed. Thus, the noise abatement assembly 140 is supported by the resilient clip 160 without flow, i.e. without the flow in the longitudinal direction of the web portion 141 (longitudinal direction of the railway rail).

3 shows a state in which the railway rail 100 shown in FIG. 2 is installed. The railway rail 100 is fixed on a plurality of the sleepers 200 and the height of the railway rail 100 A gap of a predetermined height is formed between the bottom surface of the flange portions 131 and 132 of the fuel tank 100 and the road surface (concrete or gravel). The second portion 162 of the resilient clip 160 is located in the space between the bottom surface of the flange portions 131 and 132 and the road surface below the flange portions 131 and 132 of the railway rail 100. [

The third portion 163 of the elastic clip 160 is a bent portion at the end portion of the second portion 162 and the end portion thereof is formed as a curved portion so that the side end portion of the flange portion 132 is accommodated in the curved portion. The third portion 163 of the resilient clip 160 is pressed against the side end portion of the flange portion 132 located therein by elasticity so that the resilient clip 160 abuts the flange portions 131 and 132 ).

2 shows only a single resilient clip 160 for securing the first space S1 of the railway rail 100, that is, the noise reduction assembly 140 mounted on the first web portion 121, When the second noise reduction assembly 150 is mounted on the second space portion S2, that is, the second web portion 122, the second noise reduction assembly 150 must also be fixed through the elastic clip.

3) having the same structure as that of the elastic clip 160 for fixing the noise reduction assembly 140 mounted on the first web part 121 is positioned at the center of the vertical center line of the head part 110 The second noise reduction assembly 150 is also fixedly attached to the second web portion 122 by an elastic clip.

In order to mount the noise reduction assemblies 140 and 150 on the first and second web parts 121 and 122 using the elastic clips 160 and 170, the first and second noise reduction assemblies 140 and 150 Of the area of the railway rail 100, that is, the area of the web parts 121, 122, as shown in Figure 3 (only the first noise reduction assembly 140 is shown in Figure 3) It is preferable to set the length thereof so as to correspond to the space between them.

It is also preferable to use four or more elastic clips 160 and 170 to stably fix the noise reduction assemblies 140 and 150 without detaching from the web parts 121 and 122.

Here, as shown in FIG. 3, a first web portion 121 and a second web portion 122 are provided at both ends of the first and second noise reduction assemblies 140 and 150, respectively, located at the first web portion 121 and the second web portion 122, An elastic clip 160 for fixing the first noise reduction assembly 140 mounted on the first web part 121 and an elastic clip 170 for fixing the noise reduction assembly 150 on the second web part 122, .

Along with this, the entire length of the railway rail 100, the noise reduction assemblies 140 and 150 having the same length as the web sections 121 and 122 are positioned in the web sections 121 and 122 and the noise reduction assemblies 140 and 150 Elastic clips 160 and 170 may be mounted at portions corresponding to the space between the sleepers 200 and the sleepers to securely mount the noise reduction assemblies 140 and 150 to the web portions 121 and 122 have.

The foregoing detailed description is illustrative of the present invention. Furthermore, the foregoing is intended to show and describe preferred embodiments of the invention, and the invention may be used in various other combinations, modifications and environments. That is, changes or modifications may be made within the scope of the inventive concepts disclosed herein, within the scope of equivalents to those disclosed, and / or within the skill or knowledge of those skilled in the art.

For example, by forming a plurality of through holes in the vibration-damping steel plate 144, the sound absorption effect can be improved and the space A (air layer) between the sound absorption body 143 and the vibration absorption body 142 can be arranged You may.

Claims (9)

A first and a second web portion formed on both sides of the lower portion of the web portion, and first and second flange portions extending in the horizontal direction and opposite to each other at the lower ends of the first and second web portions, On the sub-surface, the noise abatement assembly is fixedly mounted by a plurality of securing clips,
The noise abatement assembly includes:
A damping sheet adhered to the surface of the web portion;
A vibration absorber comprising a first portion located at a lower portion of the head portion of the railway rail, a second portion closely contacting the surface of the damping sheet, and a third portion corresponding to the surface of the flange portion;
The upper and lower ends of the vibration absorber are in close contact with the bottom surface of the first portion of the vibration absorber and the upper surface of the third portion, respectively, and the inner surface of the vibration absorber is spaced apart from the second portion of the vibration absorber by a predetermined distance, A sound absorbing body having a predetermined space formed therebetween; And
And a vibration damping steel plate disposed on the outer side of the sound absorbing body,
And is fixedly supported on the web portion by a fixing clip. delete The railway rail according to claim 1, wherein a space between the second portion of the vibration absorber and the sound absorbing body is filled with a sound absorbing material. The method according to claim 1,
The elastic clip is made of a metal material having excellent elasticity and is divided into a first portion corresponding to the web portion, a second portion corresponding to the lower portion of the flange, a third portion facing the first portion and corresponding to the tip of the flange,
Wherein the first portion and the second portion are at a predetermined angle so that an elastic force toward the second portion acts on the first portion and a tip of the first portion contacts the damping steel plate as the outermost member of the noise abatement assembly,
And a curved portion is formed at the boundary between the third portion and the second portion so that the side end portion of the flange portion is received in the curved portion. 5. The railway rail according to claim 4, wherein the vibration-damped steel plate has a recess having a predetermined depth for receiving the tip of the first portion of the elastic clip. The railway rail according to claim 5, wherein a plurality of through holes are formed in the vibration-damping steel plate. The railway rail according to claim 1, wherein the vibration absorber is mounted on the first web part and the second web part, respectively, by an elastic clip. 8. The railway rail according to any one of claims 1 to 7, wherein the noise abatement assembly has a length corresponding to the space between the sleepers and the sleepers in the region of the web portion. 8. The noise reduction assembly of claim 1 or 7, wherein the noise abatement assembly has a length equal to the overall length of the web portion, and wherein the elastic clip is mounted on a portion of the noise reduction assembly corresponding to the space between the sleeper and the sleeper Railway rails.

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