JP2000178901A - Electromagnetic induction heating snow-melting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the lowering of strength so as to get along without boring a hole when a heating coil is to be formed in a railroad rail, simplify work and, at the same time, to make it possible to realize such a heating snow- melting method in a tongue rail which has been difficult up to the present. SOLUTION: One or more rolls of a conductive cable 2 are wound on a web side 1A of a basic rail 1 in a railroad rail point section to form a heating coil 3, the necessity of boring a hole is eliminated to facilitate the work in a site, and special tools are not required, The heating coil can be formed not only in the web side of the rail but also be formed in a leg surface, and when the the heating coil is borne, an expansion section of washer, anchorage or the like can be used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic induction for inductively heating a rail by supplying power from a high-frequency power source in order to prevent a rail point portion of a railway from freezing due to icing and snow and making point switching impossible. It relates to a heated snow melting machine.

[0002]

2. Description of the Related Art As a conventional example of this kind, for example, Japanese Unexamined Patent Publication No.
There is one disclosed in Japanese Patent No. 158604. In this method, a through hole is made in the abdomen side surface of a railroad rail, a conductive cable is wound through this hole to form a heating coil, and high-frequency power is supplied to the coil to melt icing snow around the rail point portion. Things.

[0003]

However, in the above-described conventional example, since the holes are formed in the rail, there is a possibility that the strength of the rail is adversely affected. Also,
Rails that have already been laid require drilling work at the construction site, so personnel and equipment must be prepared for that work. There are some difficulties in construction, such as there is.

[0004] Further, when the conductive cable has a single core, the relative position between the conductive cables forming the coil changes during the mounting operation, and it is difficult to position the conductive cable. In particular, when the heating coil is formed by being attached in a loop shape (a spiral shape), it is extremely difficult to perform the heating coil. As a result, there is a problem that the heating efficiency is reduced. Therefore, an object of the present invention is to provide a rail with a through-hole, and to prepare a special tool in advance at a construction site, eliminate the need to arrange specialized personnel, and facilitate installation work. Another object of the present invention is to facilitate the operation of forming a heating coil.

[0005]

In order to solve this problem, according to the invention of claim 1, one or more turns are provided on one of the abdominal side surface and the leg surface of the basic rail or tong rail of the rail point portion for railway. Is wound in a loop to form a heating coil, and a high-frequency current is supplied to the heating coil to melt icing snow around the rail point portion. According to the invention of claim 2, a heating coil in which one or more conductive cables are formed in a loop shape is held in an extension of a washer previously installed on a basic rail or a tongue rail of a rail point portion for a railway, and the heating coil is provided. To melt the icing snow around the rail point.

According to the third aspect of the present invention, the base rail or the tongue rail of the rail point portion for railroad is provided with one abdomen side surface.
A heating coil in which a conductive cable having a length of at least one coil is formed in a loop shape is held by an extension of a washer previously set on the rail, and a high-frequency current is supplied to the heating coil to melt the icing snow around the rail point portion. I am trying to do it. According to the fourth aspect of the present invention, a heating coil in which one or more conductive cables are formed in a loop shape on one of the abdomen side surface and the leg surface of the rail or the tongue rail of the railway rail point portion is held by a fastener. A high-frequency current is supplied to the heating coil to melt icing snow around the rail point portion. In any one of the first to fourth aspects of the present invention, the heating coil may be a flat multi-core cable having a separated portion and a conductive cable connected in advance in a loop shape (claim 5). invention).

[0007] That is, by forming the heating coil on the side surface of the rail abdomen or on the leg surface, it is possible to eliminate the need for drilling a through hole in the rail and to prepare a special tool at the construction site in advance. To facilitate. If the rail has a washer extension or a fastener formed in advance, use these to support the heating coil or combine these heating coil formation methods with the heating coil support method. This eliminates the need for drilling through holes in the rails and without having to prepare special tools at the construction site in advance.
Make work easier. Furthermore, by using a flat multi-core cable or a flat multi-core cable having a separated portion, which is connected in advance so as to have a coil shape, as a heating coil, the work of forming the heating coil is facilitated, By increasing the degree of adhesion to the rail, the heating efficiency is not reduced.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a first embodiment of the present invention. In the figure, 1 is a rail, 1A is a rail abdominal surface, 1B is a rail leg surface, 2
Is a conductive cable, 3 is a heating coil unit, and 4 is a power supply device for supplying a high-frequency current. This is to form a heating coil unit 3 by attaching a conductive cable 2 to one side of the abdomen side surface of the rail 1 in a loop shape, and to supply a high-frequency current from a power supply device 4. In the figure, the number of windings is one. However, a plurality of windings may be formed in a spiral shape, and FIG. 2 shows an example of three windings. The heating coil unit 3 may be fixed to the rail 1 by an adhesive or by means shown in FIGS. 3 and 6 described later. In addition, the heating coil 3 can be fixed to the abdomen 1A of the rail 1 by using a spring-type metal fitting or the like which has been conventionally used. In addition,
The heating coil section 3 can be formed on the leg 1B of the rail 1.

FIG. 3 is a perspective view showing a second embodiment of the present invention, and FIG. 4 is a sectional view thereof. As is apparent from FIGS. 3 and 4, this is provided with a bolt 7 (FIG. 4) for fixing the rail 1 to the sleeper 6 and a rail side surface of the washer 2 previously extended as shown in FIG. The washer is formed, and one or more conductive cables 2 are sandwiched and pressed against the extending portion of the washer. The high-frequency current is supplied to the conductive cable 2 in the same manner as described above.

FIG. 5 is a perspective view showing a third embodiment of the present invention. This is shown in FIG. 3 for the case where the heating coil portion 3 is formed by winding one or more conductive cables 2 around the abdominal side surface 1A of the rail 1 as shown in FIG. This is an example employing a cable supporting method, that is, an example in which a conductive cable 2 is supported using a washer 5 having an extension.

FIG. 6 is a perspective view showing a fourth embodiment of the present invention. This is shown in FIG. 3 for the case where the heating coil portion 3 is formed by winding one or more conductive cables 2 around the abdominal side surface 1A of the rail 1 as shown in FIG. This is an example in which the cable supporting method is adopted, that is, the conductive cable 2 is supported using the fastener 8. The heating coil 3 may be formed on the leg 1B of the rail 1. Further, here, one conductive cable 2 is fixed by a plurality of fasteners 8 to form the heating coil portion 3, but the number thereof can be selected as appropriate.

By the way, in each case, a single-core conductive cable is assumed. However, in the case of a single-core conductive cable, the relative position between the conductive cables forming the coil changes due to the mounting operation, and the positioning is difficult. In particular, when a heating coil is formed by attaching a conductive cable having a large cross-sectional area to the side surface of the rail in a loop shape (a spiral shape) in order to improve the heating efficiency, there is a problem that the bending operation becomes extremely difficult. .

Therefore, in the present invention, as the conductive cable 2, a flat two-core cable as shown in FIG.
One in which two conductive portions 2A are separated and covered by a separating portion 2B is used. FIG. 8 shows an example in which such a conductive cable 2 is used. That is, a flat two-core conductive cable 2 with a spacing portion is attached to the abdomen 1A of the rail 1, and one side thereof is short-circuited like a short-circuit portion 9 to form a heating coil 3, and a high-frequency current is supplied from the power supply device 4. Things. In addition, this flat two-core cable with a separation portion can also generally be multicore. FIG. 9 shows an example of a flat six-core molded integrally with the molding material 10.

In FIG. 8, the heating coil 3 is
The flat multi-core cable 2 shown in FIG.
Can be connected in advance by the connecting portion 11 as shown in FIG. 10 to form the heating coil 3. Thereby, it is possible to easily attach the heating coil 3 to the rail simply by preparing a support member such as a washer and a fastener, and thus there is an advantage that the operation is further simplified. It should be noted that a reference numeral 10A in FIG. 10 may be a molding material or an insulating cap.

In the above, the description has been made mainly of the case where the present invention is applied to a basic rail at a railroad rail point portion. However, it goes without saying that the present invention can be similarly applied to a tong rail. In addition, the heating efficiency of this type of snow melting apparatus is generally a problem. However, the snow melting apparatus according to the present invention has a heating efficiency that is almost the same as that of the drilling type apparatus described above as a conventional example. Has also been confirmed experimentally.

[0016]

According to the first to fourth aspects of the present invention, there is no need to drill a hole as compared with the conventional one, so that there is no danger of lowering the strength of the rail, and special construction, tools and personnel are required. Advantages such as no need are obtained. According to the invention of claim 5, as the conductive cable, a conductive cable of a flat multi-core cable having a separated portion is connected in advance in a loop shape, and this is used as a heating coil to perform a coil forming operation. This makes it easy to increase the degree of adhesion to the rail so that the heating efficiency is not reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of an example of a method of winding a heating coil.

FIG. 3 is a perspective view showing a second embodiment of the present invention.

FIG. 4 is a sectional view of FIG. 3;

FIG. 5 is a perspective view showing a third embodiment of the present invention.

FIG. 6 is a perspective view showing a fourth embodiment of the present invention.

FIG. 7 is a perspective view showing an example of a flat two-core cable with a separation portion.

FIG. 8 is a perspective view showing an embodiment using the cable of FIG. 7;

FIG. 9 is a perspective view showing an example of a flat 6-core cable.

FIG. 10 is a plan view showing an example of a heating coil using a flat six-core cable.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rail, 1A ... Rail abdomen side surface, 1B ... Rail leg surface, 2 ... Conductive cable, 2A ... Conductive part, 2B ... Separation part,
DESCRIPTION OF SYMBOLS 3 ... Heating coil part, 4 ... Power supply device, 5 ... Washer, 6 ... Sleeper, 7 ... Bolt, 8 ... Fastener, 9 ... Short circuit part, 10 ... Mold material, 10A ... Mold material or insulating cap, 11
... Connections.

Claims (5)

[Claims] 1. A heating coil is formed by winding at least one conductive cable in a loop around one of the basic rail of a rail point portion of a railway or the abdominal side surface or leg surface of a tong rail. An electromagnetic induction heating snowmelter characterized by supplying a high-frequency current to melt ice and snow around a rail point. 2. An extension part of a washer previously installed on a basic rail or a tongue rail of a rail point part of a railway.
An electromagnetic induction heating type snow melting apparatus characterized by holding a heating coil in which a conductive cable having a number of turns or more is formed in a loop shape and supplying a high frequency current to the heating coil to melt icing snow around a rail point portion. 3. A heating coil in which one or more windings of a conductive cable is formed in a loop shape on a side surface of an abdomen of a basic rail or a tongue rail of a rail point portion of a railway is held by an extension of a washer previously installed on the rail. And a high-frequency current supplied to the heating coil to melt the icing snow around the rail point portion. 4. A heating coil in which one or more conductive cables are formed in a loop shape on one of an abdominal side surface and a leg surface of a basic rail or a tongue rail of a rail point portion for a rail, is held by a fastener. A high-frequency current is supplied to the heating coil to melt icing snow around a rail point portion. 5. The heating coil according to claim 1, wherein a conductive cable of a flat multi-core cable having a separation portion is connected in advance in a loop shape.
5. The electromagnetic induction heating type snow melting apparatus according to any one of items 1 to 4.