JP2002332602A - Track-point section snow-melting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a coil constituting a heating coil induction-heating a floor plate by winding around the floor plate from an external flaw by covering with a case section, to improve the mechanical strength, thermal strength and waterproofness of the heating coil and to enhance reliability and durability in a track-point section snow-melting device preventing a point non-change over due to snow and freezing at a track point section for a railway. SOLUTION: The heating coil 1 induction-heating the floor plate 4 by winding around the floor plate 4 is supplied with a high-frequency current from an inverter device 7. The heating coil 1 has the approximately U-shaped sectional case section 1a, and the heating coil 1 is constituted so as to house the coil 1b in the case section 1a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a track point snow melting apparatus for preventing point inversion caused by snow or freezing at a track point of a railway.

[0002]

2. Description of the Related Art Conventionally, as a snow melting device at a track point portion, there are a hot air type snow melting device in which kerosene or the like is burned and the hot air is blown to the point portion, and an electric heater type in which an electric heater is provided on a basic rail or a floor plate to heat. In recent years, a method has been proposed in which a rail or a floor at a point portion is heated by electromagnetic induction by applying the principle of electromagnetic induction heating.

[0003]

The conventional hot-air type snow melting apparatus has a structure in which hot air is blown to the entire point portion through a blowing duct, and heat loss in a hot-air blowing passage and heat loss due to scattering of hot air to portions other than the point portion. This results in poor heating efficiency and high fuel costs. In addition, there were problems such as danger of misfiring and the necessity of dismantling maintenance of the cover plate and the combustor during the off-season.

Further, the electric heater type snow melting apparatus has a structure in which an electric heater is pressed and held on a basic rail or a floor plate to heat by heat conduction, and a gap is formed between the electric heaters and the heat efficiency is low, the snow melting ability is low, and the temperature rise rate is low. There is a problem in that the electric heater is directly loaded with vibrations and shocks when the train passes through the electric heater, so that the electric heaters fall off from the basic rails and floor plates.

Further, in the electromagnetic induction heating type, a coil for generating a high-frequency magnetic field using a thin copper wire or the like is provided on a rail or a floor plate, but is weak in mechanical strength and heat load, and is waterproof in snowfall and precipitation. Poor reliability and poor durability. In addition, the coil is weak, and it is difficult to securely and firmly install the coil at the point of the line, and there is also a problem in performing maintenance such as replacement.

The present invention solves the above-mentioned conventional problems. A coil constituting a heating coil which is wound around a floor plate and inductively heats the floor plate is covered with a case portion to protect the coil from external damage, and a mechanical structure of the heating coil is provided. Its purpose is to improve strength, thermal strength and waterproofness, and to improve reliability and durability.

[0007]

According to the present invention, in order to achieve the above object, a high frequency current is supplied from an inverter device to a heating coil which is wound around a floor plate and induction-heats the floor plate. It has a letter-shaped case portion, and is configured to house the coil in this case portion.

[0008] Thus, by covering the coil constituting the heating coil which is wound around the floor plate and inductively heats the floor plate with the case portion, it is possible to protect the coil from external damage, and the mechanical strength, thermal strength, Water resistance can be improved, and reliability and durability can be improved.

[0009]

The invention according to claim 1 of the present invention comprises a heating coil wound around a floor plate for induction heating the floor plate, and an inverter device for supplying a high-frequency current to the heating coil. The heating coil has a case portion having a substantially U-shaped cross section, and is configured to house the coil in this case portion. The coil constituting a heating coil that is wound around the floor plate and induction heats the floor plate is a case. By covering with a part, it is possible to protect from damage, to improve the mechanical strength, thermal strength, and waterproofness of the heating coil, and it is possible to improve reliability and durability. Further, by forming the case portion with a metal or a resin member having rigidity, the case becomes more susceptible to external damage, and the robustness and durability can be improved.

According to a second aspect of the present invention, in the first aspect of the present invention, the heating coil has a substantially U shape.
The outer end is formed by a coil outlet, and the U-shaped intermediate portion is formed by a flexible connecting portion. The connecting portion allows the coil outlet to be freely movable and expanded in a substantially V-shape to extend around a line point floor plate. The heating coil can be easily inserted into a narrow space, and the installation and maintenance of the heating coil at the line point can be improved.

According to a third aspect of the present invention, in the first aspect of the present invention, the case portion of the heating coil is made of a high-permeability member having a high resistivity, a weak magnetic member or a non-magnetic member. Yes, it is possible to improve the thermal efficiency of the heating coil by concentrating the high-frequency magnetic field generated from the coil on the floor plate at the point of the line, and to prevent the high-frequency magnetic field from scattering. The effect can be eliminated.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the case portion of the heating coil has a substantially U-shaped bottom portion smaller than a floor plate thickness and an outer end inward of the width of the sleeper. It is arranged so that the open part is close to the floor plate, and by making the substantially U-shaped bottom of the case part of the heating coil smaller than the thickness of the floor plate, when the train passes through the track point part The generated vertical load and impact are supported by the floor plate, so that the load is not directly applied to the heating coil, the deformation and breakage of the heating coil can be prevented, and the robustness and durability can be improved. By arranging the outer end of the heating coil close to the side of the floorboard inside the width of the sleeper, it is possible to prevent the heating coil from being damaged by the contact of the tamping machine during the ballast tamping work of the track maintenance work, Improve robustness and durability Further, by configuring the substantially U-shaped open portion of the case portion of the heating coil so as to be close to the floor plate, the high frequency magnetic field generated from the heating coil can be concentrated and absorbed by the floor plate. Heating efficiency can be maximized, and energy saving can be realized.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the case portion of the heating coil is provided with both a holding tongue and a substantially Z-shaped holding member at substantially both ends of a sheath shape. It is attached to a sleeper in any of the configurations, and can prevent the heating coil from falling off or displacing due to vibration or impact when passing through the train, and can improve robustness and durability.

According to a sixth aspect of the present invention, in the second aspect of the present invention, a protection member for covering the flexible connecting portion of the heating coil and attaching and holding the same to the sleeper is provided. The heating coil can be prevented from being damaged by flying stones, etc. when passing, and the robustness and durability can be improved.Also, the scattering of the high-frequency magnetic field generated from the coil can be prevented, and unnecessary noise is generated. Therefore, the influence on the train signal can be eliminated.

According to a seventh aspect of the present invention, in the first aspect of the present invention, the coil comprises an insulated wire.
Single or multiple wraps around the floorboard to prevent damage due to external factors and short circuit between lines due to high temperature, improve mechanical strength and thermal strength, improve reliability and durability And workability can be improved.

According to an eighth aspect of the present invention, in the above-described seventh aspect, the coil is formed by electrically integrating both ends of a plurality of coils, and the coil is constituted by one or more coils. Is large, the number of windings on the floorboard can be reduced, and a heating coil having a large output can be provided, and a heating coil excellent in installation property and having high snow melting ability can be provided.

[0017]

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

(Embodiment 1) As shown in FIG. 1, a heating coil 1 is wound around a floor plate 4 below a basic rail 2 and a tong rail 3, and is disposed on a sleeper 5. Heating coil 1
Has a U-shaped cross section and a coil 1b
Is covered. A high frequency current is supplied to the coil 1b from a commercial power supply 6 via an inverter device 7, a connection cable 8 and a connection portion 9.

As shown in FIG. 2, the heating coil 1 is substantially U-shaped.
A connecting portion 1c which has a U-shaped intermediate portion and has a flexible shape.
The connecting portion 1c is made of a resin material, a rubber-based material, a bellows metal tube, or the like. The connecting portion 1c allows the lead portion 1d provided at the outer end of the coil 1b to freely move, and is expanded in a substantially V shape. It is configured to be able to.

Further, the heating coil 1 is configured such that the holding tongue 1e and the Z-shaped holding member 1f provided at substantially both ends of the case portion 1a are attached to and held on the sleeper 5 by using locking means alone or in combination. I have to. Here, the Z-shaped holding member 1f
Has a holding portion for pressing the case portion 1a on one piece and a locking portion for the sleeper 5 on the other piece.

The protective member 10 covers the connecting portion 1c of the heating coil 1 and is attached and held on the crossties 5 by locking means. The protection member 10 is made of a material having robustness and durability, such as a rubber-based member, a metal member, and a resin member.
c is protected. Further, the protective member 10 may be made of a highly permeable member having high resistivity such as ferrite, a weak magnetic member such as austenitic stainless steel plate or aluminum,
If it is made of a non-magnetic material such as brass, it is possible to prevent the high-frequency magnetic field from scattering from the heating coil 1 and prevent the influence on the train signal.

The operation of the above configuration will be described. The coil 1b generates a high-frequency magnetic field by a high-frequency current, and the floor plate 4 is induction-heated by the high-frequency magnetic field to generate heat. When the floor panel 4 generates heat, the temperature of the basic rail 2 and the tongue rail 3 disposed on the floor panel 4 increases due to heat conduction. The rise in temperature of the floor plate 4, the basic rails 2, and the tong rails 3 can melt snow and freeze, thereby preventing inversion of the track point portion.

Here, the case portion 1a is disposed on the sleeper 5 to prevent damage to the coil 1b due to contact of tools at the time of track maintenance work and flying stones at the time of passing the train. The case portion 1a is made of metal,
By using a resin, rubber, or the like, it is possible to provide a device having excellent robustness and durability.

The heating coil 1 has a substantially U shape.
When the heating coil 1 is disposed around the floor plate 4, the V-shaped intermediate portion is formed by the connecting portion 1 c having flexibility.
The installation work can be easily performed. Further, maintenance such as replacement of the heating coil 1 can be performed in a short time.

The heating coil 1 is provided with a holding tongue 1e, Z
The shape holding member 1f is used alone or in combination, and is firmly attached to the sleeper 5 using a locking means, so that the heating coil 1 does not fall off or displace even if it is subjected to vibration or impact when passing through the train. Can be prevented, and the robustness and durability can be improved.

The connecting portion 1c of the heating coil 1 is covered with a protective member 10, and the protective member 10 is covered with a rubber member, a metal member,
By using a rigid and durable material such as a resin member, the connecting portion 1c of the heating coil 1 can be protected from external damage caused by the wire maintenance work, and the protective member 10 can be formed of a high resistivity material such as ferrite. By using a highly permeable member, a weak magnetic member such as austenitic stainless steel plate, or a non-magnetic member such as aluminum or brass, it is possible to prevent the high-frequency magnetic field from scattering from the heating coil 1 and affect train signals. Can be prevented.

(Embodiment 2) In the heating coil 1 shown in FIGS. 1 and 2, a substantially U-shaped case portion 1a is made of a highly permeable member having high resistivity such as ferrite or a weak magnetic material such as austenitic stainless steel plate. It is composed of a body member or a non-magnetic member such as aluminum or brass. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. The high-frequency magnetic field generated from the coil 1b is applied to the floor plate 4 at the line point.
You can concentrate on Due to the concentration of the high-frequency magnetic field, the temperature of the floor plate 4 can be increased with high efficiency. Further, the self-heating of the case portion 1a itself is suppressed to prevent the heating coil 1 from being heated to a high temperature, thereby improving the durability. Further, it is possible to prevent the scattering of the high-frequency magnetic field, thereby achieving high efficiency and high signal efficiency. Can be eliminated.

(Embodiment 3) As shown in FIG. 3, the basic rail 12 is placed on a floor plate 14 mounted on a sleeper 15, and the sleeper 15 is held by a ballast 15a. Heating coil 1
Reference numeral 1 denotes a coil wound around the floor plate 14 to heat the floor plate 14 by supplying a high-frequency current, as in the first embodiment. The coil 11b is housed in a case portion 11a having a substantially U-shaped cross section. I have.

The case 11a of the heating coil 11 is
4 and is attached and held in a substantially U-shaped cross-section in a lateral position in which the opening faces the side surface of the floor plate 14. The thickness in the vertical direction (the thickness of the substantially U-shaped bottom) in a state where the case portion 11a is attached is smaller than the thickness a of the floor plate 14, and the outer end of the case portion 11a is It is configured to be inside the width b. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. The substantially U-shaped bottom of the case 11a of the heating coil 11 is
By making the thickness smaller than the thickness, the vertical load and impact generated when the train passes through the track point portion can be supported by the floor plate 14 so that the load is not directly applied to the heating coil 11. And damage can be prevented, and the robustness and durability can be improved.

Further, since the outer end of the case portion 11a of the heating coil 11 close to the side of the floor plate 14 is configured to be inside the width b of the sleeper 15, the ballast 21 is compacted by wire maintenance work. At the time of work, damage to the heating coil 11 due to contact with the tamping machine can be prevented, and robustness and durability can be improved, and removal during off-season is not required.

Further, the open portion of the case portion 11a is
4, the high frequency magnetic field generated by the heating coil 11 can be concentrated and absorbed by the floor plate 14, and the heating efficiency of the floor plate 14 can be maximized to realize energy saving. Can be.

(Embodiment 4) As shown in FIG. 4, the heating coil 21 is wound around a floor plate (not shown), and supplies a high-frequency current to inductively heat the floor plate, as in the first embodiment. The coil 21 is attached to the case portion 21a having a substantially U-shaped cross section.
b is stored.

The coil 21b is made of an insulated wire.
One or more windings are arranged around the floorboard. Further, the coil 21b is formed by integrating a plurality of lead portions 21d provided at both ends with an electric connection member 21g, and the coil 21b is constituted by one or more coils. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. The coil 21b is wrapped around the floorboard singly or plurally, and the coil 21b is formed of an insulated wire.
It is possible to prevent damage due to external factors and short circuit between lines due to high temperature. Here, when a fluororesin is used for the insulating coating, the durability can be further improved. In addition, by forming a coil using a conventional thin copper wire with an insulated wire, it is possible to prevent defects such as scratches and twists during coil processing, improve workability, and reduce cost. A heating coil can be obtained.

Further, the coil 21b has a structure in which a plurality of both ends are united by an electric connection member 21g, the coil 21b is composed of one or more coils, and the coil 21b is connected in series to increase the L value of the coil. By doing so, it is easy to attach to the line point portion, a large output is possible by the above-mentioned electrical connection, and it is possible to provide a heating coil excellent in installation property and snow melting performance.

[0038]

As described above, according to the first aspect of the present invention, a heating coil that is wound around a floor plate and induction heats the floor plate, and an inverter device that supplies a high-frequency current to the heating coil is provided. And the heating coil has a substantially U-shaped cross section.
It has a letter-shaped case part and is configured to house the coil in this case part, so that the coil can be covered with the case part to protect it from trauma, and the case part is made of metal or resin having rigidity. By being composed of members,
It becomes even more susceptible to trauma, and can improve robustness and durability.

According to the second aspect of the present invention, the heating coil has a substantially U-shape, the outer end of which is formed by a lead portion of the coil, and the U-shaped intermediate portion which is formed by a flexible connecting portion. The connecting portion allows the heating coil to be spread in a substantially V shape, thereby improving the ease of installation on the floor panel and the ease of maintenance.

According to the third aspect of the present invention, since the case portion of the heating coil is made of a high-permeability member, a weak-magnetic member, or a non-magnetic member having a high resistivity, a high-frequency magnetic field generated from the coil is generated. The thermal efficiency of the heating coil can be improved by being concentrated on the floorboard, and the scattering of the high-frequency magnetic field can be prevented, and the efficiency of the heating coil can be reduced and the influence on the train signal and the like can be eliminated.

According to the fourth aspect of the present invention, the case portion of the heating coil has a substantially U-shaped bottom portion smaller than the thickness of the floor plate, an outer end disposed inside the width of the sleeper, and an open portion formed as the opening portion. Since it is configured to be close to the floor plate, by making the substantially U-shaped bottom of the case portion of the heating coil smaller than the thickness of the floor plate, the vertical load generated when the train passes through the track point portion,
The impact is supported by the floor plate, so that the load is not directly applied to the heating coil, the deformation and breakage of the heating coil can be prevented, and the robustness and durability can be improved.
By arranging the outer end of the heating coil near the side of the floorboard inside the width of the sleeper, it is possible to prevent damage to the heating coil due to contact with the tamping machine during ballast tamping work for track maintenance work, and to be robust. And the durability can be improved. Furthermore, by configuring the substantially U-shaped open portion of the case portion of the heating coil so as to be close to the floor plate, the high-frequency magnetic field generated from the heating coil is concentrated on the floor plate. It can be absorbed, the heating efficiency of the floorboard can be maximized, and energy saving can be realized.

According to the fifth aspect of the present invention, the case portion of the heating coil is provided with either a tongue for holding or a substantially Z-shaped holding member at both ends in a sheath shape. To prevent the heating coil from falling off or dislocating due to vibration and impact when passing through the train.
Durability can be improved.

According to the sixth aspect of the present invention, since the flexible connecting portion of the heating coil is covered and the protection member is provided to be attached to and held on the sleeper, the heating coil is formed by the maintenance work, the stepping stones when passing the train, and the like. Damage can be prevented, robustness and durability can be improved, and high-frequency magnetic fields generated from the coil can be prevented from scattering, eliminating unnecessary noise and affecting train signals. can do.

According to the seventh aspect of the present invention, since the coil is formed of an insulated wire and wound one or more times around the floor plate, damage due to external factors and short circuit between lines due to high temperature are prevented. In addition, the reliability and durability can be improved, and the workability can be improved.

According to the eighth aspect of the present invention, since the coil is electrically integrated at both ends and the coil is constituted by one or more coils, the L value of the coil is increased, and To reduce the number of windings to
Further, a heating coil having a large output can be provided, and a heating coil excellent in installation property and having a high snow melting ability can be provided.

[Brief description of the drawings]

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

FIG. 2 is a partially cutaway plan view of a heating coil of the snow melting device at the point of the track.

FIG. 3 is a cross-sectional view of a main part of a snow melting device at a track point portion according to a third embodiment of the present invention.

FIG. 4 is a plan view of a main part of a heating coil of a snow melting device at a line point portion according to a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heating coil 1a Case part 1b Coil 4 Floor plate 7 Inverter device

Continued on the front page (72) Inventor Shinji Kondo 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Shizuo Takada 1006 Odaka Makoto Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72) Invention Person Seiichi Takagura 1006 Kadoma Kadoma, Kadoma City, Osaka Prefecture (72) Inventor Yoji Uetani 1006 Kadoma Kadoma, Kadoma City, Osaka Prefecture F-term in Matsushita Electric Industrial Co., Ltd. 2D056 BA02

Claims (8)

[Claims] 1. A heating coil wound around a floor plate for induction heating the floor plate, and an inverter device for supplying a high-frequency current to the heating coil, wherein the heating coil has a substantially U-shaped cross section.
A line point part snow melting device having a U-shaped case part and configured to house a coil in the case part. 2. The snow melting device according to claim 1, wherein the heating coil has a substantially U-shape, an outer end of the heating coil is formed by a lead portion of the coil, and a U-shaped intermediate portion is formed by a flexible connecting portion. 3. The snow melting device according to claim 1, wherein the case portion of the heating coil is formed of a high-permeability member having a high resistivity, a weak magnetic member or a non-magnetic member. 4. The case portion of the heating coil, wherein a substantially U-shaped bottom portion is smaller than a floor plate thickness, an outer end is arranged inside the width of the sleeper, and an open portion is close to the floor plate. The track point section snow melting device described. 5. The line point portion according to claim 1, wherein the case portion of the heating coil is attached to the sleeper at one of both ends of the sheath in the form of a holding tongue or a substantially Z-shaped holding member. Snow melting equipment. 6. The track point snow melting device according to claim 2, further comprising a protection member for covering the flexible connection portion of the heating coil and attaching and holding the heating coil to the sleeper. 7. The snow melting apparatus according to claim 1, wherein the coil is formed of an insulated wire and is wound singly or plurally around the floorboard. 8. The line point snow melting apparatus according to claim 7, wherein a plurality of coils are electrically integrated at both ends thereof, and the coil is composed of one or more coils.