JPH0925602A - Heating apparatus for rail point - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for complicate wiring operation, to install a rail point to a rail by simple operation and to utilize heating power efficiently. SOLUTION: Heating elements 3 having a self-control function automatically changing an output from heater itself in response to an ambient temperature and flexibility are abutted against the surfaces of rails 1, 2 in a beltlike manner. Heat-insulating materials 4 are superposed to the heating elements 3 while the outer circumferences of the heat-insulating materials 4 are covered with case metal fittings 5, 6, and spring type fixtures 7, 8, in which one ends are formed on the bases of the rails 1, 2, are pushed and brought into contact from the outsides of the case metal fittings 5, 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device for preventing freezing of rail points of railroads and snow damage.

[0002]

2. Description of the Related Art As a conventional rail-point heating device, a flat-shaped heating element is attached to a side surface or a bottom surface of a basic rail with fixing metal fittings, or a heating means such as a heat pipe is provided below the basic rail and the movable rail. It is known that the cable is laid.

[0003]

Among the conventional techniques, the former requires the installation of one heating element each between the sleepers, so that wiring of many heating elements attached to one rail point is required. However, there is a problem in that the construction becomes complicated and requires a lot of labor for construction and maintenance, and such a heating element cannot be attached to the contact portion between the movable rail and the movable rail of the basic rail. In the latter case, both the basic rail and the movable rail can be heated, but the construction is large, and since the contact area with both rails is small relative to the surface area of the heat generating means, the heat transfer efficiency is poor and the heating power There was a problem that waste was great.

The present invention has been made in view of the above problems of the prior art, and its object is to eliminate the need for complicated wiring work and to perform basic work and movable rail with simple work. The present invention is to provide a rail-point heating device that can be securely mounted on a rail point and is adapted to efficiently use heating power.

[0005]

In order to solve the above problems, a heating apparatus for a rail point according to the present invention has a flexible heating element formed in a long strip shape and a member arranged on the lower surface of the rail bottom. A fixing part having a pressing part which is connected to the locking part via the energy storage hinge part and which is elastically biased toward the rail side surface, and heat is generated between the pressing part of the fixing tool and the rail side surface. It is characterized in that it is configured so that the body is pressed and fixed.

The rail-point heating device of the present invention comprises a flexible heating element formed in the shape of a long strip, a locking portion arranged on the lower surface of the bottom of the movable rail, the locking portion, and a storage hinge. A fixture having a pressing portion that is connected via a portion and is elastically biased toward the upper surface of the bottom of the movable rail, and fixes the heating element by pressure contact between the pressing portion of the fixing tool and the upper surface of the bottom of the movable rail. It can also be configured as follows.

In each of the above constructions, a heating element having a self-control function of automatically changing the output of the heater itself according to the ambient temperature is brought into contact with the rail surface, and the outside of the heating element is covered with a heat insulating material. It is more preferable to press the pressing portion from the outside of the heat insulating material.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings. In the figure, 1 is a basic rail, 2 is a movable rail, 3 is a heating element mounted in a long strip along the surfaces of both rails, 4 is arranged in close contact with the heating element 3 so as to cover the heating element 3. A heat insulating material made of an appropriate material such as a foam material, 5 and 6 are case fittings for covering the heat generating element 3 and the heat insulating material 4, and 7 and 8 are fixtures for pressing the heat generating element 3 against the respective rails.

As shown in FIG. 2, the heating element 3 has a heating resistor 3b made of a conductive polymer or the like connected in parallel between the parallel bus conductors 3a, 3a, and the periphery thereof is heat-resistant such as vinyl chloride resin. It is formed by being coated with the insulating coating 3c, having a certain degree of flexibility so that it can be bent in an arbitrary direction, and being cut into an arbitrary length for use. In addition to these features, the heating element 3 of the present example further has a self-control function in which the heater itself (each heating resistor 3b portion) automatically changes the output according to the ambient temperature. In 3, the local heat generation amount can be automatically adjusted while keeping the applied voltage value constant, by increasing the heat generation amount in the low ambient temperature portion and decreasing the heat generation amount in the high ambient temperature portion. There is.

The length of the heating element 3 and the number of the heating elements to be mounted are different from each other.
In consideration of the length of the rail point to be heated, the weather conditions, the type of rail, etc., along with the formation dimension in the width direction, it is possible to select an appropriate length and number of rails. Three are mounted on the movable rail 2 and two on the movable rail 2.

The heat insulating material 4 covers the surface of the heating element 3 which is not in contact with the rail and is in close contact with this surface in order to surely and accurately exhibit the self-control function of the heating element 3 with respect to the rail. It is installed in. As a result, the heating element 3 can heat the rail uniformly without being affected by the outside air temperature and accurately corresponding to the cooling condition of the rail.

The case fittings 5 and 6 prevent the scattering when the heating elements 3 mounted on a plurality of rails and the heat insulating material 4 superposed on the heating elements 3 are pressed by the fixtures 7 and 8 to prevent the rail surface from being scattered. In order to securely hold it, a rigid long metal material is formed by bending it into a substantially U-shaped cross section so as to surround the outer peripheral surfaces of the heating element 3 and the heat insulating material 4 which are superposed on the rail surface. There is. The width of each case fitting can be appropriately formed according to the width of the heating element 3 to be mounted on each rail and the number of the mounting elements. In this example, the case fitting 5 has a width such that three heating elements 3 can be arranged side by side. The metal fitting 6 is formed to have a width such that two heating elements 3 can be juxtaposed. The length of each case metal fitting is such that the case metal fitting 5 is shorter than the pressing metal fittings 1c, 1c of the basic rail 1 (see FIG. 5), and the case metal fitting 6 is an appropriate length according to the length of the movable rail 2. It is formed respectively.

The fixture 7 is made of a linear metal material having an appropriate thickness and having rigidity. One end of the fixture 7 is coiled into several turns, for example, two turns. A locking portion 7a which extends along the opposite side and is provided so as to be hooked on the opposite edge of the bottom portion 1a, and the other end of which is shaped to match the side surface and the upper slope of the bottom portion 1a of the basic rail 1, Energy storage hinge portion 7b wound twice in a coil shape, and this energy storage hinge portion 7b
A pressing portion 7c continuously provided to one end of the locking portion 7a through a spring, and a tip portion elastically biased by the energy storing hinge portion 7b is provided so as to extend along the side surface of the basic rail 1, that is, the rail body 1b. And are formed by bending them in series. Further, the fixture 8 is also made of a linear metal material, and has a locking portion 8a having a shape matching the side surface and the bottom surface of the bottom surface 2a of the movable rail 2.
A coiled energy storage hinge portion 8b, and a tip portion that is connected to one end of the locking portion 8a via the energy storage hinge portion 8b and is elastically biased by the energy storage hinge portion 8b. A pressing portion 8 provided so as to be able to be locked to the U-shaped bent outer surface of the case fitting 6.
c is formed by bending it in series.

In both fixing tools, one ends of the locking portions 7a and 8a are arranged on the lower surfaces of the rail bottom portions 1a and 2a, and movable between the pressing portion 7c and the rail body 1b of the basic rail 1 and the pressing portion 8c. With the case fittings 5 and 6 in which the heating element 3 and the heat insulating material 4 are respectively housed in the recesses, are sandwiched between the rail 2 and the upper inclined surface of the bottom 2a, the energy storage hinges 7b and 8b are used. The rear surfaces of the case fittings 5 and 6 are pressed to the rail surface side so that the heating element 3 can be pressed and fixed to the rail surface.

To mount the heating device of this embodiment having the above-mentioned structure on the rail point, first, the heating element 3 is continuously extended along each rail so as to come into contact with the surface of the rail, and the rail is arranged. The heating element 3 is superposed on the other side of the contact portion, and the case fittings 5 and 6 to which the heat insulating material 4 is attached in advance are covered. The heating element 3 and the heat insulating material 4 may be disposed in an overlapping manner in the recesses of the case fittings 5 and 6, and the heating element 3 may be disposed on each rail so that the surface of the heating element 3 contacts the rail surface. Then, the case fittings 5 and 6 can be attached by pressing them to the rail surface side with a plurality of fixing members 7 and 8 which are locked to the rails while being separated from each other at appropriate intervals, and pressed and fixed at the pressing positions. .

In this case, in both rails 1 and 2, the heating element 3 is continuously mounted from the position farthest from the power supply position in the rail points, for example, from the tip end side of the rail points, but the basic rail 1 Holding metal fitting 1c is rail body 1b
In the portion protruding to the surface, as shown in FIG. 5, the heating element 3 is exposed on the side surface of the rail between the case metal fittings 5 and 5 adjacent to each other with the sleeper 1d interposed therebetween, and the heat generating material 3 is exposed along the outer surface of the pressing metal fitting 1c. Bend it and attach it. Further, since the movable rail 2 does not have a protruding portion such as the pressing metal fitting 1c, the movable rail 2 is mounted so as to be in planar contact with the upper inclined surface of the bottom portion 2a of the movable rail 2. The above installation procedure is an example,
Any other procedure can be adopted.

When the operating voltage is applied from the end conductors 1a, 1a of the heating element 3 after mounting on the rail point in this way, the entire heating element 3 generates heat and heats the rail. In particular, since the heating element 3 used in this example has the characteristic of self-controlling the amount of heat generation according to the ambient temperature, the heating element 3
The amount of heat generated is adjusted in accordance with the surface temperature of the rails that come into contact with the rails, while the amount of heat generated is increased in the low temperature part, while the amount of heat generated is decreased in the high temperature part and the amount of heat required for snow melting is supplied to the rail part. Reduces waste of power consumption due to overheating,
Further, it is possible to prevent overheating, burnout and the like when the heating elements 3 are close to each other or overlap each other, and the safety and durability are excellent.

Further, since the heating element 3 is press-contacted and fixed to the movable rail 2 by a fixing tool 8 which is formed so as to sandwich the upper surface and the lower surface of the bottom portion 2a of the movable rail 2, the movable rail is kept in this fixed state. 2 can be freely switched and moved, and the rail can be heated even while the rail is moving.

[0019]

As described above, according to the rail point heating device of the present invention, since the heating element having flexibility is used, the heating element is continuously attached to the rail surface in a strip shape as in the conventional example. No complicated wiring work is required, and the heating element is attached by a fixture formed so that the pressing part is elastically biased toward the rail surface, so it is easy to attach and remove the heating element. It can be reliably performed, and the work required for construction and maintenance can be extremely saved.

Further, the heating element can be mounted without disturbing the operation of the movable rail, the movable rail can be freely switched and moved, and the rail can be heated even while the rail is moving.

Further, since the heating element is pressed against the surface of each rail with a wide contact area, the heat transfer efficiency is not wasted and the heating power can be efficiently used. In particular, by using a heating element with a self-control function that automatically changes the output of the heater itself according to the ambient temperature, the heat generation amount can be automatically controlled according to the rail temperature, and By covering the outside of the heating element with a heat insulating material, the rail can be uniformly heated according to the cooling condition of the rail without being affected by the outside air temperature.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an embodiment in which a rail-point heating device of the present invention is applied to a rail part.

FIG. 2 is a diagram showing a configuration of a heating element shown in FIG.

FIG. 3 is a diagram showing an appearance of a fixture on the basic rail side shown in FIG.

FIG. 4 is a diagram showing an appearance of a fixture on the movable rail side shown in FIG. 1.

5 is an external view of a main part showing a state in which the heating device for the rail point in FIG. 1 is mounted on a rail.

[Explanation of symbols]

 1 Basic rail 2 Movable rail 3 Heating element 4 Heat insulating material 5,6 Case metal fitting 7,8 Fixture

Claims (3)

[Claims] 1. A flexible heating element formed in the shape of a long strip, a locking portion provided on the lower surface of the rail bottom, and the locking portion connected to the locking portion via a power storage hinge portion. A heating device for a rail point, comprising: a fixture having a pressing portion that is elastically urged toward, and configured to press and fix the heating element between the pressing portion of the fixing device and the rail side surface. . 2. A movable rail which is formed into a long strip and has flexibility, a locking portion arranged on the lower surface of the bottom of the movable rail, and the locking portion which is connected to the locking portion via a storage hinge portion. A fixture having a pressing portion that is elastically urged toward the upper surface of the bottom of the movable member, and is configured to press and fix the heating element between the pressing portion of the fixing tool and the upper surface of the bottom of the movable rail. And a rail point heating device. 3. A heating element having a self-control function of automatically changing the output of the heater itself according to the ambient temperature is brought into contact with the rail surface, and the outside of the heating element is covered with a heat insulating material. The rail-point heating device according to claim 1 or 2, wherein the pressing portion is elastically pressed from the outside of the material.