JPH0656101U - Heat pipe snow melting system for railway rail points - Google Patents

Abstract

(57) [Summary] [Purpose] To quickly and efficiently melt snow at the points of railway rails. [Structure] A first fixed rail 1a, a second fixed rail 2a branched from the first fixed rail 1a, a rotation center is set to the second fixed rail 2a side, and a moving end is set to the first. In the heat pipe type snow melting system for the point part of the railroad rail equipped with the movable rail 4a installed on the fixed rail 1a side, one of the fixed rails is used as a heat source rail to generate heat and one end thereof is There is provided one heat pipe B or two or more heat pipes B which are connected to the heat generation rail so as to be able to exchange heat and whose other end is arranged below the snow-melted portion of the rail.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a snow melting system for melting snow at a switching branch point (point portion) of a railroad rail.

[0002]

[Prior art]

 As is well known, the point part of the railroad rail is provided with two pairs of fixed rails for a pair of fixed rails, a movable rail is arranged between the pair of fixed rails, and two pairs of fixed rails are provided by the movable rails. It is configured to selectively connect one of the fixed rails to the pair of fixed rails. The movable rail has its center of rotation set on the side of the fixed rail that diverges, and the free end (movable end) is installed on the side of the pair of fixed rails. The line is switched by closely contacting either of them. Therefore, in order to perform the switching completely, it is necessary to avoid the inclusion of foreign matter between the movable rail and the fixed rail, and therefore, during snowfall, the snow that has accumulated is present between the movable rail and the fixed rail. In order to prevent the snow from becoming an object, for example, the fixed rail is energized to generate heat and melt the snow.

[0003]

[Problems to be solved by the device]

 However, with the snow melting method in which the rail is energized to generate heat, only the narrow range of snow along the rail is melted, so there is a possibility that almost all of the snow near the switching branch will remain and hinder the running of railway vehicles. Conventionally, there has been a problem that snow removal work by workers and the like has to be done, and snow removal cannot be performed quickly and efficiently.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a heat pipe type snow melting system capable of melting snow over a wide range by effectively utilizing a rail that has been electrically heated. Is.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention sets a first fixed rail, a second fixed rail branched from the first fixed rail, and a rotation center on the second fixed rail side. In addition, in a heat pipe type snow melting system for a point portion of a railroad rail having a movable rail whose moving end is installed on the side of the first fixed rail, one of the fixed rails is used as a heat source rail to generate heat when energized. At the same time, there is provided one heat pipe, one end of which is connected to the heat generation rail so as to be able to transfer heat, and the other end of which is arranged below the snow-melting point of the rail, or two or more heat pipes connected in series. It is characterized by

[0006]

[Action]

 The heat source for snow melting is obtained by heating one of the fixed rails with electricity. The heat pipe, which is in contact with and capable of exchanging heat, is a vacuum degassed container filled with a condensable fluid as a working fluid.Therefore, the end that is in close contact with this heat source rail is the evaporation part. The working fluid evaporates. On the other hand, the part located at the snow melting point or the part where the heat pipe with the end part is connected to this snow melting point is deprived of heat by the snow and the temperature is low, and the internal pressure Since the working fluid in the gas phase also has a low pressure, the working fluid in the vapor phase flows to the end where the temperature and pressure are low, that is, the condensing section, and radiates heat to be liquefied. In this way, the heat of the heat source rail is carried to the location away from the heat source rail by the heat pipe, so that even if the heat source is a single line, it is possible to melt the snow over a wide area.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a diagram schematically showing a point portion of a railway rail which is a target of the present invention. Two pairs of fixed rails 2a, 2a, 3a and 3a are branched to one pair of fixed rails 1a and 1a. The rails are arranged so as to form a line, and between these fixed rails, a pair of fixed rails 1a, 1a are selectively connected to branch side fixed rails 2a, 1a, 3a, 3a. Rails 4a, 4a are arranged. The movable rails 4a, 4a are fixed so that the free rails (movable ends) are in contact with either one of the pair of fixed rails 1a, 1a, with the fixed rails 2a, 3a forming the branch line as the center of rotation. It is designed to move between the rails 1a, 1a.

Any one of the fixed rails 1a, 2a and 3a (the pair of fixed rails 1a and 1a in the figure) is a heat source rail that is energized to generate heat. One end of the heat pipe A is closely connected to the side surface of 1a so as to be able to transfer heat so as not to hinder the traveling of the railway vehicle. In addition, in order to increase the amount of heat transfer, it is preferable to interpose a thermal joint at the connection point. The heat pipe A extends along the heat source rail 1a, and a plurality of other heat pipes B are connected to the other end side thereof so as to be able to exchange heat.

As the connection structure, various structures can be adopted as needed, and some examples are as follows. That is, in FIG. 2, the end portion of the other heat pipe B is formed into a cylindrical shape, and the heat source heat pipe A is inserted into the end portion in a close contact state. With such a structure, the area for transferring heat is widened, and the amount of heat transferred to the other heat pipe B is large.

Further, in the configuration shown in FIG. 3, a connecting portion having an inverted U-shaped cross section is provided at the end portion of the other heat pipe B, and the heat pipe A on the heat source side is covered with the connecting portion from above so that both heat pipes are connected. A and B are connected so that heat can be transferred. With such a structure, the connection work is easy and the workability of the layout of the other heat pipes B is improved.

Further, in the configuration shown in FIG. 4, another heat pipe B is inserted into the heat pipe A on the heat source side while maintaining airtightness, and thereby the two are connected so that heat can be exchanged. With such a structure, the working fluid of the heat pipe A comes into direct contact with the other heat pipe B, so that the heat transfer between them can be favorably performed.

[0012] The other heat pipe B is provided to widen the heat radiation portion, and its end portion extends between the rails of the point portion and is arranged below the rail. The end of the heat pipe B may be arranged parallel to the sleepers 5 and exposed to the atmosphere, but it may be buried shallow near the surface of the ground to avoid corrosion and damage. Alternatively, some coating may be applied. Further, each heat pipe A, B may be one that operates in a temperature range from a low temperature of about -30 ° C to a high temperature of about 100 ° C. Therefore, as an example, one using alcohol or water as a working fluid can be used. .

Next, the operation of the embodiment configured as described above will be described. The heat source rail 1a generates heat by passing electricity and reaches a temperature of, for example, about 100 ° C. Therefore, the heat pipe A whose one end is in close contact with the heat pipe operates as the evaporation end. That is, the working fluid of the heat pipe A receives heat from the heat source rail 1a in the evaporating portion and evaporates, and the vapor flows to the other end side to which another heat pipe B is connected. At this other end, the working fluid is condensed here because heat is taken away by another heat pipe B. The liquefied working fluid is then pumped by the capillary pressure of a wick (not shown) to return to the evaporation section side, is heated again and is evaporated, and the same cycle is repeated. That is, the working fluid transfers heat.

Similar heat transport is performed in the other heat pipe B, and heat is dissipated to the ground side at the other end of the heat pipe B to melt the snow in the vicinity. Since this heat pipe B is arranged in a wide range, it is possible to melt snow over a wide range.

Although two types of heat pipes A and B are used in the above-mentioned embodiment, this idea is not limited to the above-mentioned embodiment, and one end of the heat source rail is brought into contact with the heat source rail. It is also possible to extend the heat pipe up to the bottom of the snow melting point and arrange it in a meandering manner.

[0016]

[Effect of device]

 As described above, according to the present invention, it is possible to perform snow melting over a wide area by using linear heat, and therefore, it is possible to quickly remove snow at points that had to be done manually in the past. Moreover, it can be carried out easily and not only can reduce the burden on workers, but also contribute to ensuring the safety of the railway.

[Brief description of drawings]

1 is a schematic view showing a first embodiment of a heat pipe type snow melting system for a rail rail point portion of the present invention.

FIG. 2 is a cross-sectional view showing an example of the structure of a connecting portion.

FIG. 3 is a cross-sectional view showing another example of the structure of the connecting portion.

FIG. 4 is a cross-sectional view showing still another example of the structure of the connecting portion.

[Explanation of symbols]

1a ... fixed rail, 2a ... fixed rail, 3a ... fixed rail, 4a ... movable rail, 5 ... sleepers, A ... heat pipe, B ... heat pipe.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Takashi Chiba 1007 Izumisawa 151 Chitose-shi, Hokkaido 151 Hokkaido Fujikura Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A first fixed rail, a second fixed rail branched from the first fixed rail, a center of rotation set on the side of the second fixed rail, and a moving end of the first fixed rail. In a heat pipe type snow melting system for a railway rail point, which has a movable rail installed on the rail side, one of the fixed rails is used as a heat source rail that generates heat when energized, and one end of the rail heats up. A point of a railroad rail that is provided with one or two or more heat pipes connected in series and the other end of which is arranged below the snow-melted portion of the rail, or two or more connected in series Part heat pipe type snow melting system.