JPH07102501A - Railway point snow-melting apparatus - Google Patents

Abstract

PURPOSE:To provide a railway point snow-melting apparatus of low cost wherein temperature control and maintenance is easy by providing a heat pipe having a predetermined length at a point of railway to circulate hot water between the heat pipe and a hot-water source. CONSTITUTION:A boiler 6 is actuated based on a snowfall signal from a snowfall sensor 11. Hot water having been heated to a predetermined temperature at the boiler 6 is circulated through a pipe 5. The hot water causes temperature of one end of a heat pipe 4 in a heat transfer block 4A to rise, following which by releasing heat from the heat pipe 4, temperature of the whole heat transfer block 4A is raised. The heat transfer block 4A having high temperature is used to raise the temperature of the whole of a floor board 2 thereby melting snow. Waste heat delivered from the boiler 6 during heating is discharged through a waste heat duct 8 toward the end of a tongue rail 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a railway point snow melting apparatus, and more particularly, to a railway point snow melting apparatus for raising the temperature of rails and floor plates by means of heat radiating means for circulating hot water to melt snow.

[0002]

2. Description of the Related Art As a conventional railway point snow melting apparatus, there is an apparatus shown in FIG. This device has an electric heater 16 which is tightly fixed to the side surface of the basic rail 3 and the side surface of the floor plate 2 by a fixing fixture 15 for exclusive use.
By connecting A to a power source (not shown) and energizing the electric heater 16, heat is generated to raise the temperatures of the basic rail 3 and the floor plate 2 to perform snow melting.

Further, FIG. 7 has a canterra 18 which is housed in a concrete container 17 which is buried by removing the ballast (not shown) in the roadbed directly below the basic rail 3, and the lower surface of the basic rail 3 is shown. The snow melting apparatus which directly heats and burns snow by the burner 18A of the canterra 18 is shown. Here, 1 is a sleeper and 2 is a floor board.

[0004]

However, the conventional railway point snow melting apparatus has the following problems. (1) In the snow-melting device with electric heater, the power consumption is as large as 6.4KW in the configuration in which eight electric heaters of 300W are installed on the side of the rail and 20 electric heaters of 200W are installed on the side of the floor with AC 100V. , A power cable having a capacity corresponding to the load current of 64 A must be used for wiring, and a large transformer is required when power is taken from the overhead line, which causes a problem of high initial cost. In addition, if the power supply to the heater is not appropriately released in response to the end of the snowmelt, there is a problem that the heater abnormally overheats and burns the floorboard or sleepers. (2) In the snow melting device by Cantera, the flame of the burner may be blown out by the strong wind and the snow melting function may be impaired.
Further, there is a problem that soot is likely to be accumulated in the burner due to combustion, and cleaning is required each time, so that maintainability is poor.

Therefore, an object of the present invention is to provide a railway point snow melting apparatus which is compact, has excellent temperature controllability, maintainability, and snow melting, and is inexpensive.

[0006]

In order to make the present invention a compact, excellent temperature controllability, maintainability and snow melting property, and an inexpensive snow melting device, the present invention is arranged in close contact with the basic rails and floorboards of railway points. A heat pipe with a predetermined length,
It has a hot water pipe line that is thermally coupled to the heat pipe and circulates hot water between the heat pipe and the hot water source, and control means that inputs a snowmelt or freeze protection signal to drive the heating part of the hot water source. In addition, the hot water piping path is branched for the left and right basic rails, and a heat pipe is connected in series to each of the left and right basic rails to circulate the hot water supplied from the hot water source and return it to the hot water source. (EN) Provided is a railway point snow melting device provided with an exhaust means for inducing and blowing the exhaust of a hot water source to a tongue rail.

[0007]

[Operation] When the heat of the hot water supplied from the hot water source is transferred to the heat pipe which is in close contact with the rail and floor plate of the railway point, the working fluid of the heat pipe absorbs heat and evaporates, and the vapor of the heat pipe Evenly distributed over the entire length. The exhaust heat of the steam heats and liquefies the rail and floor plate. This operation is repeated to prevent snow melting and freezing at railway points. Only the heat pipes need be attached to the rails and the floor plate according to the heating pattern, and the hot water pipes need only be locally thermally coupled to the heat pipes, so that the layout of the hot water pipes can be simplified.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A railway point snow melting apparatus of the present invention will be described in detail below with reference to the drawings. The parts having the same configurations and functions as those of the conventional technique are designated by the same reference numerals, and the duplicate description will be omitted.

FIG. 1 shows an embodiment of a railway point snow melting device of the present invention, in which a basic rail 3 and a tongue rail 7 are laid via a floor plate 2 on the upper surface of a sleeper 1 laid in parallel with each other. There is. Each floor plate 2 is provided with a heat transfer block 4A made of a metal having good heat conductivity such as copper and aluminum, which accommodates heat pipes (not shown) on both sides, and hot water is circulated in this heat transfer block 4A. A hot water header (not shown) described later, to which the pipe 5 is connected, is in close contact. Pipe 5 is a kerosene-fired boiler 6
It is connected to the.

The boiler 6 has a waste heat duct 8 that guides and ejects exhaust heat generated at the time of heating hot water to the tip of the tongue rail 7. The boiler 6 is connected to a control device 10A of a control office 10 by a signal line 9. ing. The control device 10A is connected to a remote monitoring board 10B provided with a closing switch (not shown) of a snow melting device and a snowfall sensor 11 for outputting a detection signal based on snowfall.

FIG. 2 is an enlarged view of one of the basic rails 3 shown in FIG.
Branched on the way from the boiler 6 (not shown),
The pipe 5 guided to one of the basic rails 3 is composed of the hot water headers 14 that are in close contact with the heat transfer blocks 4A provided on both sides of the floor plate 2 and the heat pipe 13 fixed to the abdomen 3A of the basic rail 3 in series. Connected to.

The heat pipes 13 are arranged in the extension direction of the basic rail 3 at intervals equal to the width of the sleepers (not shown), and the pipe 5 is connected to the other end side of the sleepers (see FIG. It is connected to hot water headers 14 provided at both ends of the floor plate 2 (not shown). Also for the other basic rail (not shown), the heat pipe 13 and the hot water header 1
4 is similarly connected by a pipe 5.

A heat transfer pipe (not shown), which will be described later, is housed in the heat pipe 13 fixed to the abdomen 3A of the basic rail 3, and this heat transfer pipe is connected in series with the hot water header 14.

FIG. 3 shows a cross section taken along the line AA of FIG.
A tongue rail 7 is arranged inside the basic rail 3, and a heat pipe 13 accommodating a high-performance heat transfer tube (not shown) connected in series with a hot water header described later is provided on one side of the abdomen 3A of the basic rail 3. It is installed.

FIG. 4 is an enlarged view showing the structural cross section of the heat pipe 13 fixed to the abdomen 3A of the basic rail 3. The heat pipe 13 has an elongated box shape, contains a heat transfer tube 5A to which the pipe 5 is connected, and is sealed while containing a working fluid (not shown) that repeats evaporation and liquefaction, Basic rail 3 with fixing bracket 13A
It is fixed to the abdomen 3A. In this case, the pipe (not shown) connected to the other end of the heat transfer pipe 5A is connected to the pipe on the right side indicated by reference numeral 5 in FIG.

FIG. 5 shows a floor plate 2 arranged directly under a basic rail 3 and a tongue rail (not shown) in the sleeper 1, and a heat transfer block 4A provided on a side surface (one side is not shown) of the floor plate 2. Has a built-in heat pipe 4. This heat transfer block 4A is integrally fixed by a fixing metal fitting 2A so that a hot water header 14 in which hot water is circulated by a pipe 5 is brought into close contact with one end thereof.

The operation will be described below with reference to the drawings.

First, in the winter, the distant monitoring board 10 at the management office 10
Turn on the closing switch (not shown) of B. At this time, the control device 10A does not output the drive signal to the boiler 6 when the detection signal from the snowfall sensor 11, that is, the snowmelt signal is not input, so the snowmelt device does not operate.

On the other hand, when the closing switch (not shown) is turned on and the snow melting signal is input from the snowfall sensor 11, the control device 10A outputs a driving signal to the boiler 6, and the driven boiler 6 is Hot water heated to a predetermined temperature is circulated in the pipe 5.

By circulating this hot water, as shown in FIGS.
The hot water header 14 shown in FIG. 2 has its temperature raised by hot water and is in close contact with the heat pipe 4 in the heat transfer block 4A.
Raise the temperature at one end. The heat pipe 4 radiates the absorbed heat uniformly over the entire length, and raises the temperature of the entire heat transfer block 4A. The temperature of the entire floorboard 2 is raised by the heat transfer block 4A whose temperature has been raised, so that snow melting is performed.

On the other hand, in the heat pipe 13 shown in FIGS. 2 and 4, when the hot water heated to a predetermined temperature is circulated from the pipe 5 to the heat transfer pipe 5A, the working liquid filled inside boils. Heat is transferred to the basic rail 3.
Due to this heat transfer, the temperature of the basic rail 3 rises and the snow is melted.

Further, the exhaust heat generated in the boiler 6 when the hot water is heated is guided by the waste heat duct 8 and ejected toward the tip of the tongue rail 7. This prevents the tongue rail 7 from freezing inside the abdomen 3A of the basic rail 3.

By constructing the railway point snow melting apparatus in this way and arranging at each point, the basic rail and the floor plate are melted by the heat transfer action of the heat pipe heated to a predetermined temperature, and the waste heat is removed. By effectively utilizing it, it is possible to effectively prevent sticking due to freezing of the tip end portion of the tongue rail which is the movable portion of the point.

Further, since it is only necessary to use a boiler of a necessary and sufficient size for each point, it is possible to make the entire snow melting device a compact structure.

Moreover, since the boilers of the rails and the floor board are appropriately turned on and off by the control unit, the problem of burning the floor board or sleepers does not occur.

For example, if the shape of the waste heat duct is devised so that the exhaust heat of the boiler heats the tongue rail and the rolling rod at the same time, a good snow melting function is achieved without impairing the point conversion function, especially in cold regions. It can be a railway point snow melting device.

In this embodiment, the control device outputs the drive signal to the boiler based on the detection signal of the switch and the snowfall sensor when the snowmelter is turned on. However, instead of the snowfall sensor, the freezing of the rail is detected. A temperature sensor may be used, or a control device that automatically outputs a drive signal based on a predetermined outside air temperature condition may be configured.

Further, means for detecting the end of snow melting may be provided, or the control device may be provided with a function of automatically stopping the driving of the boiler after a lapse of a predetermined time.

[0029]

As described above, according to the railway point snow melting device of the present invention, the heat pipe of a predetermined length closely arranged on the basic rail and floor plate of the railway point, and the heat pipe and the heat pipe It has a hot water pipe line that is connected and circulates hot water between the heat pipe and the hot water source, and control means that inputs a snowmelt or freeze prevention signal to drive the heating part of the hot water source. The pipe path is branched for the left and right basic rails, and a heat pipe is connected in series for each of the left and right basic rails to circulate the hot water supplied from the hot water source and return it to the hot water source. Since the exhaust means for inducing and blowing to the tongue rail is provided, it is possible to provide compact and excellent temperature controllability, maintainability and snow melting property, and to provide at low cost.

[Brief description of drawings]

FIG. 1 is an overall view showing an embodiment of a railway point snow melting device of the present invention.

FIG. 2 is an enlarged view of one of the basic rails 3 of the railway point snow melting device of the present invention.

FIG. 3 is an explanatory view showing a cross section of a basic rail 3 to which a heat pipe 13 is fixed in a portion AA of FIG.

FIG. 4 is a heat pipe 1 attached to a basic rail 3.
3 is a structural cross-sectional view of FIG.

FIG. 5 is an explanatory view showing a floor plate portion of the railway point snow melting device of the present invention.

FIG. 6 is an explanatory diagram showing an example of a conventional railway point snow melting device.

FIG. 7 is an explanatory diagram showing an example of a conventional railway point snow melting device.

[Explanation of symbols]

1 sleepers 2 floor boards 2A, 13A, 15 fixing brackets 3 basic rails 3A abdomen 4, 13 heat pipes 4A heat transfer blocks 5 piping 5A heat transfer tubes 6 boilers 7 tong rails 8 waste heat ducts 9 signal lines 10 control offices 10A remote control devices Monitoring board 11 Snowfall sensor 14 Hot water header 16 Electric heater 16A Lead wire 17 Container 18 Cantera 18A Burner

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Tadanobu Takimura 1-6-5 Marunouchi, Chiyoda-ku, Tokyo Within East Japan Railway Company (72) Satoshi Takahashi 1-6-5 Marunouchi, Chiyoda-ku, Tokyo East Japan Railway Company (72) Inventor Atsushi Katsumata 1-6-5 Marunouchi, Chiyoda-ku, Tokyo East Japan Railway Company

Claims (2)

[Claims] 1. A heat pipe of a predetermined length, which is arranged in close contact with a basic rail and a floorboard of a railway point (branch), and a heat pipe and a hot water source which are thermally coupled to the heat pipe. A railway point snow-melting device, comprising: a hot-water pipe line for circulating hot water between the two; and a control means for inputting a snow-melting or freeze-prevention signal to drive a heating part of the hot-water source. 2. A heat pipe having a predetermined length, which is arranged in close contact with a basic rail and a floorboard of a railway point (branching device), and a branch for the left and right basic rails, and each of the left and right basic rails. A hot water pipe line that connects the heat pipes in series to and circulates the hot water supplied from the hot water source and returns the hot water source to the hot water source, and a control that inputs a snow melting or freeze prevention signal to drive the heating unit of the hot water source A railway point snow-melting device comprising: means and an exhaust means that guides the exhaust gas generated in the heating part of the hot water source to the tongue rail and blows the exhaust gas to the tip of the tongue rail.