JP2003003401A - Railway track - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a railway track which almost dispenses with washing and prevents the occurrence of a trouble of making a train undetectable by preventing an increase in leakage conductance. SOLUTION: This railway track 1 is equipped with rails 2 and 2 and a supporting surface (a slab 3) for supporting the rails 2 and 2. Insulating layers 5 are provided in positions near the rails 2 and 2 on the supporting surface. Preferably, the insulating layer 5 is formed from insulation coating.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a railroad track having rails on a supporting surface.

[0002]

2. Description of the Related Art Generally, railroad tracks are insulated by installing an insulating material at the bottom of the rails, and also by providing gaps between unit rails connected in the lengthwise direction.

When a vehicle passes over such an insulated rail, a pair of rails is short-circuited via the axle of the vehicle. Utilizing such a principle, form a track circuit in which the transmitter is arranged at the end of the train traveling direction and the receiver that receives the current from the transmitter is arranged at the end opposite to the train traveling direction. For example, this track circuit makes it possible to detect whether or not there is a vehicle on the rail, and thus the position of the vehicle can be detected.

[0004]

However, if the support surface or the like for supporting the rail becomes dirty, the leakage conductance increases, the resistance between the rail and the support surface decreases, and the support surface for the current flowing through the track circuit is reduced. The amount of leakage (leakage current) to the For this reason, the current received by the receiver is reduced, and the train detection becomes an obstacle, making it impossible to detect the vehicle position.

The cause of the large leakage current is water, dust, iron powder and the like, and iron powder is considered to be a major factor. This iron powder is considered to be generated mainly due to wear of the brake material when the vehicle brakes. Here, the use of the brake is concentrated near the stations, and is not often used between the stations. Since the iron powder thus generated is magnetized, it is carried as it is attached to the brake material, wheels, etc., falls off due to vibrations, and falls near the rails. Therefore, regardless of whether the train is near or far from the station, iron powder will fall in the vicinity of the rail, resulting in the train undetectable obstacle due to the increase in the leakage conductance as described above.

As a measure against such a train undetectable obstacle, for example, in a track in which a support surface for laying a rail is formed by a slab, a rail or a fastening device for fastening the rail to the support surface is regularly washed. And so on. However, since the cleaning of rails and the like is largely human-powered, running costs increase. Further, in some places, it is not possible to flush the dirty water after washing, and therefore there is a place where the washing itself cannot be performed, and it is the current situation that the leakage conductance cannot be prevented from increasing in such places.

[0007] The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent the train undetectable failure by requiring almost no cleaning and preventing the leak conductance from increasing. The purpose is to provide an orbit.

[0008]

In a railway track according to the present invention, an insulating layer is provided on a rail surface of the rail track provided with a rail and a supporting surface for supporting the rail, in the vicinity of the rail. This is the means for solving the above problems.

According to this railroad track, since the insulating layer is provided on the support surface in the vicinity of the rail, conduction from the rail to the support surface via iron powder or the like is prevented, which results in a large leakage conductance. Can be suppressed.

When the supporting surface is formed of a slab, it becomes possible to form an insulating layer on the surface (supporting surface) of the slab when manufacturing the slab in advance.
It is possible to reduce the amount of work on site. Further, when a recess is formed on the surface of the slab along the length direction of the rail, it is preferable that the insulating layer is provided on the inner surface of the recess. If an insulating layer is formed, water, dust, iron powder, etc. are likely to accumulate in the recesses, and conduction to the supporting surface is likely to occur here. Therefore, increase in leakage conductance due to conduction to the supporting surface is effective. Can be suppressed to.

Further, it is preferable that the position near the rail includes a position near a fastening device for fixing the rail on the support surface. In this case, the rail is electrically connected to the support surface through the fastening device. Is prevented, which suppresses an increase in leakage conductance.

[0012] Further, it is preferable that the insulating layer is formed of an insulating paint, and by doing so, the insulating layer can be easily formed, and the insulating layer can be easily formed even on an existing railway track, for example. Since it can be formed, it becomes possible to suppress the increase of the leakage conductance. Furthermore, when the insulating layer is formed of an insulating coating, it is preferable that the insulating coating has water repellency. If the insulating layer is formed of such a water repellent insulating coating, By preventing rainwater or the like from collecting on the insulating layer and wetting the entire surface thereof, conduction between the rails due to rainwater or the like is effectively prevented. Further, when the insulating layer is formed of an insulating paint, it is preferable that this insulating paint has permeability, and if the insulating layer is formed of such a penetrating insulating paint. Even if rainwater or the like accumulates on the insulating layer, the permeation of rainwater or the like prevents the entire surface from getting wet, and therefore conduction between the rails due to rainwater or the like is effectively prevented.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is described in detail below.
FIG. 1 is a diagram showing an example of an embodiment of a railroad track of the present invention, in which reference numeral 1 is a railroad track. The railroad track 1 is formed by including a pair of rails 2 and 2 and a slab 3 that supports them.

The surface of the slab 3 serves as a support surface for the rails 2 and 2, and recesses 4 and 4 for accommodating the lower portions of the rails 2 and 2 are provided on the surface side of the rails 2 and 2. It is formed along the length direction. Here, the slab 3 is made of precast concrete (PC) made of general reinforced concrete, and has a water cement ratio of 45%, for example.
Hereinafter, the unit amount of cement is 400 kg / m ³ or the like.

In the recesses 4 and 4, an insulating layer 5 is formed on the bottom surface of the rails 2 and 2 which substantially serves as a support surface. The insulating layer 5 is made of an insulating paint, and the insulating paint is applied to the bottom surfaces of the recesses 4 and 4,
It was formed. The insulating coating material may be any conventionally known general coating material without particular limitation. However, in particular, the coating film (insulating layer 5) obtained has water repellency or permeability. preferable. As a material having such water repellency or permeability, specifically, an insulating coating made of a silicone resin is suitable. The insulating coating material made of this silicone-based resin is prepared by mixing alkoxysilane as a main ingredient and mixing this with a solvent such as isopropyl alcohol.

The insulating paint is applied to the bottom surfaces of the recesses 4 and 4 by brush coating or a roll coater and is cured to form an insulating film, that is, an insulating layer 5. The insulating layer 5 made of such an insulating paint spreads not only to the surface of the slab 3 but also to the inside of the slab 3 because the insulating layer 5 soaks into the surface layer of the slab 3 when the paint is applied to the surface. It is a layer of the state.

The insulating layer 5 thus formed
Is formed on the bottom surfaces of the recesses 4 and 4 for accommodating the rails 2 and 2, and as a result, positions near the rails 2 and 2 on the support surfaces of the rails 2 and 2, that is, the rails 2 and 2 are formed. It is formed at a position immediately below and a position on the side thereof.

Further, as shown in FIG. 2, the rails 2 and 2 are provided in the recess 4 with the rails 2 and 2 on the surface of the slab 3.
That is, the fastening device 6 for fixing to the bottom surface of the recess 4 is attached. The fastening device 6 is a generally known conventional fastening device, and includes an insert (not shown) made of an insulating material such as ceramics embedded in the slab 3 and a rail 2 which is fixed to the insert with a bolt or the like. And a fixing device (not shown) for fixing. Under such a configuration, the insulating layer 5 is formed in the vicinity of the fastening device 6, that is, the position immediately below the fastening device 6 and the position on the side thereof, and therefore, in this example, The positions near the rails 2 and 2 also include the positions near the fastening device 6.

In the railroad track 1 having such a configuration, since the insulating layers are provided on the bottom surfaces of the recesses 4 and 4 which are located in the vicinity of the rails 2 and 2, the slab is slabbed from the rail 2 through iron powder or the like. It is possible to prevent an increase in the leakage conductance such as conduction to the train No. 3, thereby increasing the leakage amount (leakage current) of the current flowing through the track circuit to the slab 3 or the like, which may cause an undetectable train failure. Can be prevented.

Since the supporting surface for supporting the rails 2 and 2 is formed by the slab 3, the insulating layer 5 is formed on the surface (supporting surface) of the slab 3 when it is manufactured in a factory in advance. Therefore, it is possible to reduce the amount of work on the site when laying this. In addition, water and garbage,
Since the insulating layer 5 is formed on the bottom surface of the recess 4 where iron powder or the like is likely to accumulate, it is possible to effectively suppress an increase in leakage conductance due to conduction to the slab 3. Further, since the insulating layer 5 is also formed in the vicinity of the fastening device 6, it is possible to suppress an increase in leakage conductance due to conduction from the rail 2 to the slab 3 via the fastening device 6.

Further, since the insulating layer 5 is formed of an insulating coating material, the insulating layer 5 can be obtained by simply applying and curing the coating material, which facilitates the formation of the insulating layer 5 and thus enhances the workability. . Further, for example, even with respect to an existing railroad track, the insulating layer 5 can be easily formed by applying an insulating coating material to the supporting surface thereof, so that the increase of leakage conductance is suppressed,
Train undetectable failures can be prevented. Further, since the insulating layer 5 made of the insulating paint is a layer that extends not only to the surface of the slab 3 but also to the inside of the slab 3, there is conduction between the rails 2 and 2 through the inside of the slab 3. It is possible to surely prevent the accident.

If the insulating layer 5 is formed of an insulating coating material having water repellency or permeability, for example, a coating material made of silicone resin, the insulating layer 5 is water repellent even if rainwater or the like is accumulated on the insulating layer 5. Since the entire surface is not wetted by the effect or the penetration effect, it is possible to effectively prevent conduction between the rails 2, 2 due to rainwater or the like. As an experiment, when the insulating layer 5 was formed with a coating material made of a silicone resin and water was sprinkled on the insulating layer 5 to measure the leak conductance, the leak conductance was reduced by several times as compared with the case where the insulating layer 5 was not formed. did.

In the above embodiment, the rails 2, 2
Although the supporting surface for supporting the slab is constituted by the slab 3, the present invention is not limited to this and may be constituted by a general concrete sleeper, and in that case, the rails 2 and 2 in the sleeper are also provided in the vicinity thereof. By providing the insulating layer 5 at the position, it is possible to prevent an increase in leak conductance and prevent a train undetectable failure.

Further, the concave portion 4 is formed on the surface of the slab 3,
Although the insulating layer 5 is provided on the inner surface of the recess 4, the rails 2, 2 are directly formed on the surface of the slab 3 without forming the recess 4.
May be installed, and in that case also, for example, a strip-shaped insulating layer 5 is provided in the vicinity of the rails 2 and 2 to prevent an increase in leak conductance and prevent an undetectable train failure. You can In addition, in the above-described embodiment, the insulating layer 5 is formed only on the bottom surface of the recess 4. However, the insulating layer 5 may be formed not only on the bottom surface but also on the side wall surface thereof. If it is formed wide, the effect of preventing train undetectable obstacles can be further enhanced.

Further, in the above-mentioned embodiment, the insulating layer 5 is formed of the insulating paint, but the insulating layer is formed by, for example, attaching an insulating tape or an insulating film near the rail. Alternatively, even if the insulating layer is formed in this manner, it is possible to obtain the effect of preventing the train undetectable failure.

[0026]

As described above, in the railroad track of the present invention, the insulating layer is provided in the vicinity of the rail on the supporting surface,
It is possible to prevent conduction from the rail to the support surface via iron powder, etc., which prevents an increase in leakage conductance and increases the amount of leakage of current flowing in the track circuit (leakage current). It is possible to prevent train undetectable obstacles. In addition, since it is reliably insulated by the insulating layer, it does not require regular cleaning as in the conventional case, so that the running cost required for cleaning can be reduced.

Further, when the supporting surface for supporting the rail is manufactured in advance in a factory or the like, an insulating layer can be formed on the surface (supporting surface), and therefore, on-site work for laying it. The amount can be reduced. Further, when a recess is formed on the surface of the slab along the length direction of the rail, if the insulating layer is provided on the inner surface of the recess, water, dust, iron powder, etc. will be present in the recess. Since the water easily accumulates and conduction to the support surface easily occurs, it is possible to effectively suppress an increase in leak conductance due to conduction to the support surface. Further, since the insulating layer is also formed in the vicinity of the fastening device, it is possible to suppress an increase in leakage conductance due to conduction from the rail to the slab via the fastening device.

Further, if the insulating layer is made of an insulating coating material, the insulating layer can be easily formed and the workability is improved. Further, for example, since it is possible to easily form an insulating layer even on an existing railway track,
This makes it possible to suppress an increase in leak conductance and prevent train undetectable failures. Furthermore, if the insulating paint has water repellency or permeability, it is possible to prevent rainwater or the like from accumulating on the insulating layer made of this water repellent or penetrative insulating paint to wet the entire surface. It is possible to effectively prevent conduction between the rails due to rainwater or the like, and reduce the leak conductance.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts showing a schematic configuration of an embodiment of a railway track according to the present invention.

FIG. 2 is a plan view of an essential part of the railway track shown in FIG.

[Explanation of symbols]

1 ... Railroad track, 2 ... Rail, 3 ... Slab (support surface),
4 ... Recessed portion, 5 ... Insulating layer, 6 ... Fastening device

Claims (7)

[Claims] 1. A railroad track having a rail and a support surface for supporting the rail, wherein an insulating layer is provided on the support surface in the vicinity of the rail. 2. The railroad track according to claim 1, wherein the support surface is formed of a slab. 3. The railroad track according to claim 2, wherein a recess is formed on the surface of the slab along the length direction of the rail, and the insulating layer is provided on the inner surface of the recess. 4. The rail track according to claim 1, wherein the rail vicinity position includes a position near a fastening device for fixing the rail on the support surface. 5. The insulating layer is formed of an insulating coating material, as claimed in any one of claims 1 to 4.
Railroad track described in paragraph. 6. The railroad track according to claim 5, wherein the insulating paint has water repellency. 7. The railway track according to claim 5, wherein the insulating coating material has permeability.