JPH11131403A - Snow melting device for point - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy and inexpensive snow melting device for point in which a heating range can be properly selected by use of a constant temperature heating element. SOLUTION: The snow or ice adhered and frozen around a point for moving a movable tongue rail placed on a floor board fixed to a sleeper to perform the branching operation of a railway is melted. At this time, an aluminum alloy-made housing 10 opened in lower part which contains a constant temperature heating element 1 is arranged between sleepers so that the top surface of the housing 10 has a prescribed space G to the bottom surface of a movable tongue rail 3, and a prescribed current is applied to the constant temperature heating element 11 to melt the snow.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow melting apparatus for a point (railroad branch) on a railway track, and more particularly to a snow melting apparatus for a point using a constant temperature heating element capable of selecting a heating temperature range.

[0002]

2. Description of the Related Art Usually, a snow melting device is used as a snow damage prevention measure in a portion of a railway in a snowfall area where the course of a turnout of a railway is changed, that is, at a point. These snow melting apparatuses are classified into an electric type, a hot air type and a water spray type depending on the snow melting source. In the electric type, an electric heating element is attached to an object, and the apparatus is simple, but there is a problem that the cost of a heat source is increased. In the hot air type, hot air obtained by burning kerosene is blown to key points through ducts.
High melting snow effect, but requires excessive equipment and maintenance.Water spray type uses hot water jet equipment to spray hot water to the point, which also requires excessive equipment and makes it difficult to finely adjust temperature. And so on. There is also a simple one using cantera.

Further, as a snow melting apparatus in which an electric heating element is attached to a point portion, there is an apparatus using a sheet-shaped heating element as shown in FIGS. 6 and 7 (for example, JP-A-5-13).
No. 2902). Here, the main rail 30 and the movable tong rail 31 are placed on a floor board 34 fixed with a dog nail 35 on a railroad sleeper 32, and the movable tong rail 31 is moved on the floor board 34 to perform a branching operation. It is supposed to do. Therefore, this type of conventional snow melting apparatus that performs this branching operation at the time of snowfall without hindrance is covered with an electric insulator 36 between the floor plate 34 and the sleeper 32, as shown in FIG. A sheet-like heating element 33 that generates heat by application of a large voltage current is inserted.

[0004]

However, in such a conventional point-melting snow apparatus using a sheet-shaped heating element, a low voltage and a large current are applied to the heating element to generate heat. In addition to the high cost of the heat source, the sheet-shaped heating element is inserted between the sleeper and the floorboard, which not only complicates the installation, but also causes the load of the railway vehicle to be directly applied to the sheet-shaped heating element. It was necessary to pay attention to its strength. In addition, since a simple sheet-like heating element is used, there is a problem that it is extremely difficult to select a heat source required for melting snow.

Accordingly, the present invention has been made in view of the above-mentioned problems of the conventional point-melting snow melting apparatus, and is provided between a main rail constituting a point and a sleeper on which a movable tong rail is placed. It is an object of the present invention to provide a snow melting apparatus at a point where another sleeper is appropriately laid, and a constant-temperature heating element capable of setting various temperature ranges provided in an aluminum casing is arranged on the sleeper. .

[0006]

According to the present invention, there is provided a point melting snow melting apparatus which moves a movable tong rail mounted on a floor board fixed to a sleeper to adhere around a point where a track is branched. In a device that melts snow, ice, etc. that freezes snow, ice, etc., a housing with an open lower part made of aluminum alloy with a built-in constant-temperature heating element capable of setting various temperature ranges between sleepers, and the top surface of the housing is a movable tong rail Is disposed so as to have a predetermined gap with respect to the bottom surface of the device, and a predetermined current is applied to the constant-temperature heating element to perform melting snow.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a point melting snow melting apparatus according to the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, a point (branch) of a railway track on which the point snow melting apparatus 1 of the present invention is disposed.
Is a main rail 2 supported on a steel plate 5 fixed to a sleeper 4 with a dog nail 6 and a movable tongue which is moved on the floor 5 by being actuated by a switching rod 7, a lock rod 8 and a flot rod 9. And a rail 3. In addition, as shown in FIG. 2 which is an enlarged view of a part A in FIG. 1, another sleeper or a concrete floor is laid between the sleepers 4 and 4 in the snow melting apparatus 1 of the point of the present invention. Of the movable tong rails 3 on the upper surface thereof.

FIG. 3 is a vertical sectional view taken along the line III--III in FIG.
As shown in the figure, the melting snow melting apparatus 1 of the present invention is a box-shaped aluminum alloy having an opening on the lower surface or an inverted U-shaped section made of an aluminum alloy (cast or pressed) having an opened rail. Housing 1 about 10 mm thick
The countersunk screw 16 and the nut 1 to be screwed on the countersunk screw 16 on the inner wall ceiling
The housing 10 is fixed to a sleeper or a concrete floor surface 18 by a fixing tool such as a dog nail 19 through a flange surface thereof. The main body rail 2 is mounted on the top surface of the housing 10, and the movable tong rail 3 is provided such that the bottom surface thereof can move with a slight gap G between the top surface and the movable tongue rail 3. I have.

As shown in FIGS. 4 (a), 4 (b), and 4 (c), the constant temperature heating element 11 used in the snow melting apparatus 1 of the present invention is a rectangle of about 23 mm × 37 mm. The heating element has a thickness of about 6 mm. On one surface thereof, four terminals 12, 13 and two mounting holes 14 are provided.

As shown in the circuit diagram of FIG. 5, a current is applied from the terminals 12 and 13 to the heat generating portion 15 of the constant temperature heating element 11 so that the heat generating portion 15 generates heat. When the constant-temperature heating element 11 is used or mounted, heat-resistant grease (such as cylinder grease) is applied between the substrate of the heating element 11, the insulator 20, and the heating object (the aluminum housing 10).

As the constant temperature heating element 11, a commercially available heating element, for example, a constant temperature heating element Postar (registered trademark) of Murata Manufacturing Co., Ltd. can be used.

The constant temperature heating element posistor has a rating as shown in Table 1.

[0014]

[Table 1]

As described above, for example, by selecting one of the product names A to L, it is possible to obtain the substrate temperature (for example, 90 ° C. to 205 ° C.) of various constant temperature heating elements in a considerably wide range. it can.

The constant-temperature heating element 11 itself has two functions of a heating function and a temperature control, and does not have a pulsation of the heating temperature unlike when a bimetal is used. Also,
Since it is small and lightweight and has a simple structure, it is extremely easy to handle wiring and the like. Furthermore, in a normal use condition, the life characteristics are good, and a longer time use is possible as compared with a nichrome heater. Therefore, the equipment cost, the maintenance cost, and the heat source cost of the point as a heating element of the snow melting apparatus 1 can be reduced.

When using the snow melting apparatus 1 of the present invention, a constant temperature heating element 11 is mounted inside a housing 10 made of an aluminum alloy, and a movable tong rail 3 at the point shown in FIG. 1 is laid. Another sleeper lays a concrete floor surface 18 between the appropriate sleepers 4 and 4 and attaches a snow melting device 1 at a point to the concrete floor 18 with a dog nail 19, and wires the terminals 12 and 13 to a predetermined power supply (shown in FIG. None), a predetermined current is applied to the constant temperature heating element 11.

By applying this current, the constant temperature heating element 11
Generates heat and transfers the heat to the top surface of the aluminum housing 10, and transfers the heat to the main body rail 2 and the movable tongue rail 3 mounted on the top surface to prevent melting snow, freezing, and the like in this portion. Become like As a result, it is possible to switch points without any trouble even during snowfall. The constant temperature heating element 11 is changed in accordance with the amount of snowfall to obtain a desired substrate heating temperature (for example, 90 ° C. to 205 ° C.). Thereby, effective melting snow melting according to the amount of snowfall becomes possible.

[0019]

According to the snow melting apparatus for points of the present invention, the apparatus can be arranged very easily and easily at the switching points of railway points, so that the snow melting and freezing at snowfall areas can be efficiently prevented. It is done beforehand. As a result, the point can be switched without any trouble, and normal operation of the railway vehicle can be performed even during snowfall.

Further, since a commercially available constant-temperature heating element having various ratings can be used as the heating element, effective melting of snow in accordance with the amount of snowfall can be performed, and the cost of the point snow melting apparatus can be reduced. There is an effect that the maintenance cost and the heat source cost are extremely low as compared with the conventional one.

[Brief description of the drawings]

FIG. 1 is a plan view around a railway point (railroad turnout) to which a point snow melting device of the present invention is applied.

FIG. 2 is a partially enlarged plan view of the snow-melting apparatus of the present invention shown in FIG.

FIG. 3 is an enlarged vertical sectional view of the point of the present invention shown in FIG.

FIG. 4A is a plan view, FIG. 4B is a side view, and FIG. 4C is a longitudinal sectional view of a constant temperature heating element used in the snow melting apparatus according to the present invention.

FIG. 5 is a circuit diagram of the constant temperature heating element shown in FIG.

FIG. 6 is a plan view around a railway point to which a conventional snow melting apparatus for a point is applied.

7 is an enlarged vertical sectional view of the conventional snow melting apparatus at a point shown in FIG. 6, taken along the line VII-VII.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Snow melting apparatus 2 Main body rail 3 Movable tong rail 4 Sleeper 5 Floor plate 6 Dog nail 7 Track rod 8 Lock rod 9 Front rod 10 Aluminum alloy housing 11 Constant temperature heating element 12 Terminal 13 Terminal 14 Mounting hole 15 Heating element 16 Plate Screw 17 Nut 18 Concrete floor surface 19 Dog nail 20 Insulation.

Claims (1)

[Claims] An apparatus for melting snowfall, ice, and the like that has adhered and frozen around a point at which a movable tong rail mounted on a floor plate fixed to a sleeper is moved to perform a branching operation of a track. An aluminum alloy housing with a built-in constant temperature heating element between the sleepers and having an open lower part is disposed such that the top surface of the housing has a predetermined gap with respect to the bottom surface of the movable tong rail, and A melting snow melting device at a point, wherein a current is applied to the constant temperature heating element to melt snow.