JPH10280303A - Rail heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a rail heater having an excellent thermal efficiency by housing a surfacing heating body and covering with a jacket, and sealing its top with a lid through a partition plate. SOLUTION: An external surface side 3 at the opposite side of a contact surface 2 with a rail R of the main body 1 of a heater is opened and a recessed portion 4 is provided in which an insulation sheet 6, a surface type heating body 7, and a synthetic resin 9 are filled, and escape of heat from the surface type heating body 7 to the outside is prevented. Moreover, a barrier plate 13 made of an aluminum plate is provided on the heating body 7, and the escape of heat from the recessed portion 4 is absorbed and heat is conducted to the rail R through the heater main body 1. Finally, a lid 10 is attached through a packing 11 made of silicone rubber, and the recessed portion 4 is sealed. Then, this heater 1 is attached to the side face 2 of the rail R in such a manner that heat generated from the surface type heating body 7 is able to conducted effectively to the rail R. In this way, the heat efficiency of the heater 1 can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rail heater used to prevent freezing of rails such as railroad rails and snow damage.

[0002]

2. Description of the Related Art For example, as disclosed in Japanese Utility Model Application Laid-Open No. 5-87002, an outer body is provided on an outer surface side of a heater body opposite to a contact surface with a rail side surface. Some have a structure in which an air chamber is provided between them.

[0003]

The above prior art employs a configuration in which an air chamber is provided on the outer surface side opposite to the contact surface with the rail side surface, as compared with a rail heater consisting only of a heating element. Therefore, due to the presence of the air chamber, the heat radiation of the heater main body is insulated by air and the heat loss can be reduced.However, because of the air chamber, convection occurs in the air chamber and the heat is conducted to the exterior plate, so that the heat is It is not always perfect to reduce losses.

[0004] The present invention has been made with the object of providing a rail heater which has a smaller heat loss than the conventional example and is excellent in thermal efficiency.

[0005]

SUMMARY OF THE INVENTION A recess mainly formed of a heater mainly made of a material having good thermal conductivity such as aluminum, and an outer surface of the heater which is open on an outer side facing a contact surface with a rail side surface. A planar heating element engaged with the recessed portion so as to conduct heat to the heater main body is covered with a synthetic resin layer layered on the recessed portion, and the sealing lid of the recessed portion is heated by the heating. And a partition plate made of a material having good thermal conductivity such as aluminum is interposed in the synthetic resin layer so as to be parallel to the sealing lid, and the peripheral end of the partition plate is By adding a configuration that is polymerized so as to be capable of conducting heat to the main body of the heater, a product with even more excellent thermal efficiency can be provided.

[0006]

1 shows a rail heater according to an embodiment of the present invention. FIG. 1 is a partially cutaway plan view, and FIG. 2 is a sectional view taken along line XX of FIG.

In the figure, reference numeral 1 denotes a heater mainly made of aluminum. The main body 1 has a contact surface 2 with a side surface Ra of a rail R in an arc shape compatible with the side surface Ra. The recessed portion 4 is provided by opening the opposite outer surface 3 side.

The concave portion 4 comprises a central concave portion 4a disposed at the center along the longitudinal direction of the main body 1 and side concave portions 4b, 4b disposed on both sides of the central concave portion 4a.
Steps 5 and 5 are provided on both sides along the side recess 4b.

Reference numeral 6 denotes a thin insulating sheet made of polyimide. The insulating sheet 6 is formed by a central recess 4a of the recess 4.
Is disposed adjacent to the bottom wall 1 ′ of the heater, and insulates between the sheet heating element 7 and the heater main body 1.

The insulating sheet 6 may be made of any material, but heat from the sheet heating element 7 passes through the insulating sheet 6.
A thin-walled material that easily conducts to the heater main body 1 should be used.

The sheet heating element 7 is layered on the surface of the insulating sheet 6 and conducts heat to the conductor 8 engaged with the side recess 4b to generate heat, thereby heating the heater main body 1. In the embodiment, a known material made of a composite material of conductive tetrafluoroethylene resin and conductive carbon is used.

The sheet heating element 7 and the conducting wire 8 are connected to each other at both ends of the heater main body 1, that is, at both ends in the longitudinal direction of the concave portion 4 (longitudinal direction of the rail R).

In the figure, reference numeral 9 denotes a synthetic resin layer provided to fill the recessed portion 4. The synthetic resin layer 9 has insulation and waterproof properties, and heat generated by the sheet heating element 7 as a heat source. The synthetic resin layer 9 is designed to prevent the escape from the recess 4 to the outside world as much as possible.
A partition plate 13 made of an aluminum plate fitted into the partition plate 1 is interposed, and heat for escaping from the central recess 4a is applied to the partition plate 1.
3, and is transmitted to the rail R through the main body 1.

Reference numeral 10 denotes a sealing lid for closing the recess 4 filled with the synthetic resin layer 9 so as to be parallel to the partition plate 13. The sealing lid 10 is a packing (made of silicone rubber) 1.
1 is secured to the heater main body 1 by screws 14, and water is prevented from entering the recess 4 by the presence of the sealing lid 10. By being inserted into the concave groove 12 provided on the outer side surface 3 of the heater main body 1, the sealing performance is further improved.

In the product of the embodiment, the insulating sheet 6 and the sheet heating element 7 are laid in the central recess 4a of the recess 4 of the heater main body 1 (in addition to the lead wire engaged with the side recess 4b). 8 is connected to the sheet heating element 7).
After the resin material constituting the synthetic resin layer 9 has been filled in a, the partition plate 13 is engaged with the step portion 5 and fitted into the central recess 4a, and the partition plate 13 is interposed in the synthetic resin layer 9. As described above, from the outside of the partition plate 13, the resin material is further filled in the unfilled space including the side recessed portions 4b to complete the synthetic resin layer 9, and then the packing is performed. It is obtained by screwing the sealing lid 10 through 11.

In order to produce a product through such an order, the partition plate 1
Since the resin material is interposed between the main body 3 and the main body 1 of the step portion 5, the partition plate 13 and the main body 1 of the heater may not always be continuous. Has been successfully tested,
It goes without saying that the heat conduction is better when the partition plate 13 is continuous with the main body 1.

As shown in FIG. 2, an air chamber 15 is formed between the hermetic lid 10 and the synthetic resin layer 9, which is shown on the drawing (for displaying the packing 11). Although there is no part having a specific function that can be said to be the air chamber 15 in practice, there is no inconvenience even if there is an air chamber that fulfills a specific function due to the presence of air in implementing the present invention.

In the figure, reference numeral 17 denotes a thermostat, and 18 denotes a fuse.

[0019]

According to the present invention, as described above, the rail is heated by the main body of the heater using the heat generated by the planar heating element as a heat source. Therefore, it is possible to provide a rail heater having an unconventional structure. The heat generated from the planar heating element does not escape to the outside by the synthetic resin layer having low thermal conductivity, so that a heater with high thermal efficiency can be provided.

Further, the heat escaping through the synthetic resin layer is again absorbed by the partition plate and conducted to the rails, so that a product with even higher thermal efficiency can be provided.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view.

FIG. 2 is a sectional view taken along line XX of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body of a heater 2 Contact surface 3 Outer side surface 4 Depressed part 7 Planar heating element 9 Synthetic resin layer 10 Sealing lid 13 Partition plate

Claims (2)

[Claims] 1. A heater main body made of a material having good heat conductivity such as aluminum, and a concave portion having an opening on an outer surface side facing a contact surface with a rail side surface is provided on the heater main body.
A planar heating element engaged with the main body of the heater so as to be capable of conducting heat is covered with a synthetic resin layer provided in the concave section, and a sealing lid of the concave section is mainly provided in the main body of the heater. Rail heater installed. 2. A partition plate made of a material having good heat conductivity such as aluminum is interposed in a synthetic resin layer so as to be parallel to a sealing lid, and a peripheral end of the partition plate is mainly placed on the heater. The rail heater according to claim 1, wherein the rail heater is polymerized so as to be capable of conducting heat.