JP2003003403A - Snow-melting device for switch part of track - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make durability and workability excellent and reduce costs, by increasing the mechanical strength and thermal efficiency of a heating coil unit, which is mounted on an object to be heated, etc., and heats the object inductively, in a snow-melting device for a switch part of a track, which prevents accumulation of snow and freezing at the switch part of the railroad track from causing the impossibility of switching from one track to another. SOLUTION: An inverter makes a high-frequency current supplied to the heating coil unit 5 which is mounted on the object to be heated such as a stock rail 3, a tongue rail and a base plate, so as to heat the object inductively. The unit 5 holds a coil holding member 7 which makes a coil 8 wound for holding around an outer frame member 6 forming an outer frame, and coupling members 9, which are composed of a high-magnetic-permeability material having high resistivity, are disposed in an outer peripheral part of the coil 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow melting device for a railroad track point portion which prevents the railroad track point portion from being converted due to snow or ice.

[0002]

2. Description of the Related Art Conventionally, there are hot-air type snow-melting devices for burning kerosene and blowing hot air to the points, and electric heater-type snow-melting devices for heating by attaching to basic rails or floor boards as snow melting devices at railroad points. . Further, in recent years, an electromagnetic induction heating type snow melting apparatus has been proposed in which the principle of electromagnetic induction heating is applied to heat a rail or floor plate at a point by electromagnetic induction.

[0003]

A conventional hot-air type snow melting device has a structure in which hot air is blown to the entire point portion through a blower duct, and heat loss in the blowing passage of the hot air and heat loss due to scattering of hot air to other than the point portion occur. Occurs, the thermal efficiency is poor, and the fuel cost becomes high. In addition, there were problems such as operation stop due to misfire, dismantling and maintenance of cover plates and combustors during off season.

The electric heater type snow melting device has a structure in which the electric heater is pressed and held on the basic rail or floor plate to heat it by heat conduction, and a gap is created between the basic rail or floor plate and the electric heater, resulting in poor thermal efficiency. There were problems such as low snow melting ability and slow temperature rise.

Further, in the electromagnetic induction heating type snow melting apparatus, although a coil for generating a high frequency magnetic field is provided on a rail or a floor plate by using a thin copper wire or the like, it is vulnerable to mechanical strength and heat load and is waterproof during snowfall or precipitation. Inferior in performance, poor reliability and durability, and there was a problem in practical use.

The present invention solves the above-mentioned problems of the prior art by improving the mechanical strength and thermal efficiency of a heating coil unit mounted on an object to be heated for induction heating, excellent in durability and workability, and reducing the cost. The purpose is to do.

[0007]

In order to achieve the above object, the present invention supplies a high frequency current by an inverter device to a heating coil unit which is attached to an object to be heated, such as a basic rail, a tongue rail, and a floor plate, to perform induction heating. The heating coil unit is a unit in which a coil holding member in which a coil is wound and held around an outer frame member forming an outer frame is held, and a coupling member made of a high magnetic permeability material having a high resistivity is arranged on the outer peripheral portion of the coil. is there.

As a result, it is possible to improve the mechanical strength and thermal efficiency of the heating coil unit that is attached to an object to be heated or the like for induction heating, is excellent in durability and workability, and can reduce the cost.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is a heating coil unit which is mounted on an object to be heated such as a basic rail, a tongue rail, and a floor plate for induction heating, and a high frequency current is applied to the heating coil unit. And an inverter device for supplying the heating coil unit, wherein the heating coil unit holds a coil holding member in which a coil is wound around an outer frame member forming an outer frame, and the outer peripheral portion of the coil is made of a high magnetic permeability material having a high resistivity. The coil is protected from external damage, the robustness and the durability can be improved, and the thermal efficiency of the object to be heated can be improved. Further, when the outer frame member is made of metal or a resin member having rigidity, the outer frame member is more resistant to external damage, and the robustness and durability can be improved. Moreover, if the coil holding member is made of a resin material having high heat resistance, the robustness and durability can be further improved.

According to a second aspect of the present invention, in the invention according to the first aspect, the coil holding member has a coil accommodating groove formed in a peripheral portion and is made of a high magnetic permeability material having a high resistivity in a central portion. A central connecting member is provided, an outer peripheral connecting member made of a high magnetic permeability material having a high resistivity is provided on the outer peripheral portion of the coil housing groove, and the outer peripheral member is held by a locking means.
By winding the coil along the storage groove, the coil winding process can be facilitated, and a low-cost heating coil unit can be provided. Also, the central connecting member,
The outer peripheral coupling member allows the object to be heated to efficiently absorb the high frequency magnetic field generated by the coil, thereby improving the thermal efficiency.

According to a third aspect of the present invention, in the invention according to the first or second aspect, the coil holding member is a core member around which the coil is wound and held, and a covering member disposed on both side surfaces of the core member. The core member and the cover member are formed in a bobbin shape, and the coil can be wound around the core member to be processed, and the workability can be improved, A cost heating coil unit can be provided.

According to a fourth aspect of the invention, in the invention according to the first aspect, a plurality of coil holding members, each having a coil wound around it, are arranged so that the coils are wound in the same direction. A connection is provided by connecting wires in series or in parallel, which can prevent a canceling loss of a high-frequency magnetic field generated between coils, and provide a highly efficient heating coil unit. Also, by wiring the coils in parallel, it is possible to suppress the current applied to the coils and suppress the temperature rise, thereby improving reliability and durability.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the coil is formed of a heat-resistant insulating coated electric wire, which can prevent external damage at the time of winding process and also have high heat resistance. It is possible to provide a heating coil unit having improved, robustness and high durability.

According to a sixth aspect of the present invention, in the invention according to the first or second aspect, the connecting members are a central connecting member, an outer peripheral connecting member, the central connecting member and an outer peripheral connecting member. And a connecting portion connecting member for connecting the above, and the connecting portion connecting member is arranged in the opposite direction to the object to be heated, and the outer peripheral portion connecting member, the central portion connecting member, and the connecting portion connecting member are E. It is configured into a mold to form an E-shaped magnetic path, and the high-frequency magnetic field can be concentrated on the object to be heated at the line point portion,
The high frequency magnetic field generated by the coil can be efficiently absorbed by the object to be heated, and the thermal efficiency can be improved. Further, it is possible to prevent the high-frequency magnetic field from scattering and prevent the influence of signals or the like on external devices. Further, with the configuration of the outer frame member that covers the coupling member, even if the space between the outer frame member and the coupling member is narrowed, the temperature rise of the outer frame member can be suppressed, downsizing can be achieved, and the space can be saved and narrow. Can be easily attached to the place.

According to a seventh aspect of the present invention, in the first aspect of the present invention, there is provided an electric connecting portion for connecting the heating coil lead-out portion and the power supply wire lead-out portion, and the electric connecting portion is covered with an insulating member. A waterproof member is injected into the space between the electrical connection part and the insulating member, so that even if water enters the heating coil unit due to snow or rainwater used outdoors, the electrical connection part must be completely waterproof. Electrical insulation performance can be ensured and reliability can be improved.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) As shown in FIGS. 1 and 2, the track point portion is constructed by disposing a floorboard 2 on a sleeper 1, and mounting and holding a basic rail 3 and a tongue rail 4. There is. The heating coil unit 5 includes an outer frame member 6 forming an outer frame, a coil holding member 7 housed in the outer frame member 6,
A coil 8 wound and held around the coil holding member 7,
The coil holding member 7 is composed of a coupling member 9 arranged on the outer periphery of the coil holding member 7, and is attached and held to the side surface of the basic rail 3 by an outer frame holding member 10.

A high-frequency current is supplied to the heating coil unit 5 from the commercial power source 11 via the inverter device 11 and the power line 12.

The operation of the above configuration will be described. The heating coil unit 5 includes a power line 13 from the inverter device 12.
A high-frequency magnetic field is generated by a high-frequency current supplied through the base rail 3, and the high-frequency magnetic field causes the basic rail 3 to be heated by induction heating. When the basic rail 3 generates heat, the floor plate 2 and the tongue rail 4 rise in temperature due to heat conduction. Basic rail 3,
Due to the temperature rise of the floor plate 2 and the tongue rail 4, it is possible to thaw snow and freezing and prevent inversion of the track point portion.

Here, the coil 8 is protected by the coil holding member 7 and the outer frame member 6, and it is possible to prevent the tool from coming into contact during the track maintenance work and the like, and the damage due to vibrations and flying stones when the train passes. At the same time, it is possible to prevent deterioration of insulation due to infiltration of snow and rainwater.
The robustness and durability of can be improved.

(Embodiment 2) As shown in FIG. 3, a coil holding member 7a has a groove 14 for accommodating a coil 8a formed in a peripheral portion thereof, and a central portion made of a highly magnetically permeable material having a high resistivity in a central portion. A member 15 is provided, and an outer peripheral coupling member 16 made of a high magnetic permeability material having a high resistivity is provided on the outer peripheral portion of the storage groove 14.

The coil holding member 7a is a coil 8a.
Is formed by a core member 17 around which the core member 17 is wound and held, and a cover member 18 disposed on both side surfaces of the core member 17, and the core member 17 and the cover member 18 are formed in a bobbin shape. The other structure is the same as that of the first embodiment.

The operation of the above configuration will be described. The heating coil unit generates a high-frequency magnetic field by the high-frequency current supplied from the inverter device, and the high-frequency magnetic field inductively heats the basic rail to generate heat.

By winding the coil 8a along the storage groove 14, the coil 8a can be easily wound and a low-cost heating coil unit can be provided. Further, the central coupling member 15 and the peripheral coupling member 16 allow the object to be heated to efficiently absorb the high-frequency magnetic field generated by the coil 8a, thereby improving the thermal efficiency.

The coil holding member 7a is composed of a core member 17
Further, since the cover member 18 is formed in the bobbin shape, the coil 8a can be wound around the bobbin-shaped core member 17 for processing, and it is possible to provide a heating coil unit having excellent workability and low cost. Further, the central connecting member 15 is attached to the central portion.
If the storage portion for the outer peripheral portion coupling member 16 is integrally provided on the storage portion and the outer peripheral portion, the assemblability can be further improved.

(Embodiment 3) As shown in FIG. 4, the coil holding member 7b winds and holds the coil 8b.
The coils 8b arranged in multiple layers are
The winding direction is the same, and the connection of the coil 8b is wired in series or in parallel. Further, the coil 8b is made of a heat-resistant insulating coated electric wire.

Further, as shown in FIG. 5, the central connecting member 15b has an outer peripheral connecting member 16b and a connecting portion connecting member 19b.
And the connecting portion connecting member 19 is arranged in the direction opposite to the basic rail 3. Other configurations are the same as those in the first or second embodiment.
Is the same as.

The operation of the above configuration will be described. The heating coil unit generates a high-frequency magnetic field by the high-frequency current supplied from the inverter device, and the high-frequency magnetic field induces heating of the basic rail 3 to generate heat.

Here, the coil 8b is the coil holding member 7
Since the coil is wound around and held on b, and the winding directions are the same, the canceling loss of the high frequency magnetic field generated between the coils 8b can be prevented, and a highly efficient heating coil unit is provided. You can Further, by wiring the coils 8b in parallel, it is possible to suppress the current applied to the coils 8b, suppress the temperature rise, and improve the reliability and durability.

Further, since the coil 8b is made of a heat-resistant insulating covered electric wire, it is possible to prevent external damage during winding process, improve heat resistance, and improve robustness and durability.

Further, by disposing the connecting portion connecting member 19 for connecting the outer peripheral portion connecting member 16b and the central portion connecting member 15b, the connecting member 9b is formed in an E shape to form an E type magnetic path, The high frequency magnetic field can be concentrated on the basic rail 3 at the line point portion. Further, with this configuration, it is possible to prevent the high-frequency magnetic field from scattering to the peripheral portion of the basic rail 3 and prevent the influence of signals and other external devices.

Further, the outer frame member 6b for covering the connecting member 9b.
With this configuration, even if the space between the outer frame member 6b and the coupling member 9b is narrowed, the temperature rise of the outer frame member 6b is suppressed, the size can be reduced, and the space can be saved and the device can be easily attached to a narrow place. it can.

(Embodiment 4) As shown in FIG. 6, the heating coil lead-out portion 21 is connected to the power supply wire lead-out portion by an electric connecting portion 22, and the electric connecting portion 22 is covered with an insulating member 24.
A waterproof member 25 is injected into the space between the electrical connection portion 22 and the insulating member 24. The other structure is the same as that of the above-described first to third embodiments.

The operation of the above structure will be described. Even when water enters the heating coil unit 5c due to snow or rainwater used outdoors, the electric connection portion 22 can be completely waterproofed to ensure electric insulation performance, and the heating coil unit has high reliability. 5c can be provided.

[0035]

As described above, according to the invention described in claim 1 of the present invention, a heating coil unit mounted on an object to be heated, such as a basic rail, a tongue rail, and a floor plate, for induction heating, and this heating coil unit. And an inverter device for supplying a high-frequency current to the heating coil unit, wherein the heating coil unit holds a coil holding member in which a coil is wound around an outer frame member that forms an outer frame and holds the outer frame member, and the outer peripheral portion of the coil has a high resistivity. Since the coupling member made of a magnetically permeable material is provided, the coil can be protected from external damage, the robustness and durability can be improved, and the thermal efficiency of the object to be heated can be improved.

According to the second aspect of the present invention, the coil holding member has the coil housing groove formed in the peripheral portion, and the central portion coupling member made of a highly magnetically permeable material having a high resistivity is provided in the central portion. Since an outer peripheral coupling member made of a highly magnetically permeable material having a high resistivity is provided on the outer peripheral portion of the coil housing groove and is held by the outer frame member by the locking means, the coil winding process is facilitated and the heating at a low cost is achieved. A coil unit can be provided. Further, the central part coupling member and the outer peripheral part coupling member allow the object to be heated to efficiently absorb the high frequency magnetic field generated from the coil, thereby improving the thermal efficiency.

According to the invention of claim 3, the coil holding member includes a core member around which the coil is wound and held.
The core member and the cover member are formed on both side surfaces of the core member, and the core member and the cover member are formed in a bobbin shape, so that the coil can be wound around the bobbin-shaped core member for processing. The workability can be improved and a low cost heating coil unit can be provided.

Further, according to the invention described in claim 4, a plurality of coil holding members, each having a coil wound around it, are arranged in a stacked manner, the winding directions of the coils are the same, and the connection of the coils is connected in series or in parallel. Since it is wired, it is possible to prevent the canceling loss of the high frequency magnetic field generated between the coils,
To provide a highly efficient heating coil unit. Also, by wiring the coils in parallel, it is possible to suppress the current applied to the coils and suppress the temperature rise, thereby improving reliability and durability.

According to the invention described in claim 5, since the coil is made of a heat-resistant insulating coated electric wire, it is possible to prevent external damage at the time of winding process, improve the heat resistance, and improve the robustness and durability. It is possible to provide a high heating coil unit.

According to the sixth aspect of the present invention, the connecting member includes a central connecting member, an outer peripheral connecting member, and a connecting portion connecting member connecting the central connecting member and the outer peripheral connecting member. And the connecting portion coupling member is arranged in the opposite direction to the object to be heated, so that the high frequency magnetic field is prevented from scattering,
It is possible to prevent influences on external equipment such as signals, to prevent influences on external equipment such as signals, and to reduce the size of the outer frame member, which saves space and can be easily installed in narrow spaces. it can.

Further, according to the invention of claim 7, there is provided an electric connecting portion for connecting the heating coil lead-out portion and the power supply wire lead-out portion, and the electric connecting portion is covered with an insulating member to be insulated from the electric connecting portion. Since a waterproof member is injected into the member space, even if water enters the heating coil unit due to snowfall or rainwater when used outdoors, the electrical connection part can be completely waterproofed to ensure electrical insulation performance. It is possible to improve reliability.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view of a line point snow melting device according to a first embodiment of the present invention.

FIG. 2 is an enlarged plan view of the main part of the snow melting device on the line point.

FIG. 3 is a partially cutaway plan view of a line point snow melting device according to a second embodiment of the present invention.

FIG. 4 is a plan view of an essential part of the snow melting device for a track point part according to a third embodiment of the present invention with a part thereof cut away.

FIG. 5 is a side sectional view of a main part of the snow melting device on the line point portion.

FIG. 6 is a partially cutaway plan view of a line point snow melting device according to a fourth embodiment of the present invention.

[Explanation of symbols]

2 floor boards 3 basic rails 4 tongue rails 5 heating coil unit 6 Outer frame member 7 Coil holding member 8 coils 9 Connecting member 12 Inverter device

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Seiichi Takagura             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F-term (reference) 2D056 BA02

Claims (7)

[Claims] 1. A heating coil unit that is mounted on an object to be heated, such as a basic rail, a tongue rail, and a floor plate, for induction heating, and an inverter device that supplies a high-frequency current to the heating coil unit. A snow melting device for a line point portion, in which a coil holding member, in which a coil is wound and held around an outer frame member forming an outer frame, is held, and a coupling member made of a highly magnetically permeable material having a high resistivity is arranged on an outer peripheral portion of the coil. 2. The coil holding member has a coil accommodating groove formed in a peripheral portion, a central coupling member made of a highly magnetically permeable material having a high resistivity is provided in a central portion, and a high resistance is provided in an outer peripheral portion of the coil accommodating groove. An outer peripheral coupling member made of a high magnetic permeability material,
The track point snow melting device according to claim 1, wherein the snow melting device is held on the outer frame member by locking means. 3. The coil holding member is formed of a core member around which a coil is wound and held, and a cover member disposed on both side surfaces of the core member, and the core member and the cover member are formed in a bobbin shape. The snow melting device according to 1 or 2 described above. 4. The snow melting line portion according to claim 1, wherein a plurality of coil holding members, each having a coil wound around it, are arranged in a stacked manner, the winding directions of the coils are the same, and the connection of the coils is wired in series or in parallel. apparatus. 5. The track-point-snow-melting device according to claim 1, wherein the coil is composed of a heat-resistant insulating coated electric wire. 6. The connecting member comprises a central connecting member, an outer peripheral connecting member, and a connecting connecting member connecting the central connecting member and the outer connecting member, wherein the connecting connecting member is The track point snow melting device according to claim 1 or 2, wherein the snow melting device is arranged in a direction opposite to that of the object to be heated. 7. An electric connection part for connecting the heating coil lead-out part and the power supply line lead-out part is provided, the electric connection part is covered with an insulating member, and a waterproof member is injected into a space between the electric connecting part and the insulating member. 1. The track point snow melting device described in 1.