JPH08170317A - Snow melting device for track girder - Google Patents

Abstract

PURPOSE: To melt a snow cover on the travelling surface of a steel track girder. CONSTITUTION: A plurality of heater bodies 9, in which thermal conductive plates 13 are installed at both ends so as to be brought into surface-contact with a travelling surface plate 1, are arrayed and mounted, and the anti-contact surfaces of the heater bodies 9 are surrounded by heat-insulating materials 16. These heater bodies 9 are set up while the heat-insulating materials 16 are fast stuck on the travelling surface plate, and parallel nodes of unit wirings, where the heater bodies 9 are bonded by crossovers, are formed zigzag.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow removing device for track girders, which is suitable for securing adhesive strength during snowfall and freezing for monorail vehicles, and more particularly to a heating device for enhancing the heat transfer effect of electric heater heating. Is.

[0002]

2. Description of the Related Art As a measure against snowfall and freezing in a monorail vehicle, there is a snow removal device with a brush attached to the vehicle, which removes snow on the running surface below the girder, depending on the amount of snowfall and the quality of snow. It was not possible to completely remove the snow, and the snow remaining on the running surface was crushed by the tires of the vehicle, forming an ice-burn shape.
There was a problem of slipping tires. In particular, steel girders, unlike concrete girders, are apt to be affected by temperature, and there is a drawback that a frozen road surface is easily formed and adhesive strength becomes insufficient. As a measure against snowfall on roads and new transportation system tracks, there is an example of snow melting by embedding a heater on the road surface. In addition, in the vertical movement expansion joint of the movable end of the monorail branch device for cold regions,
There are cases where a heater is attached to prevent freezing of the pin type hinge portion, and in a rail car, a heater is built in the lower rail of the door to prevent freezing, and a tape-shaped heater is wound to heat the pipe.

[0003]

In the above conventional road surface embedded heater, there is no measure for heat transfer in concrete for enhancing the snow melting effect on the running surface. Further, the heater applied to the expansion joint of the monorail branch device and the heater built into the lower rail of the railroad vehicle door are all designed to prevent freezing of the movable parts and are not configured to enhance the heat transfer effect. Further, in a monorail vehicle during snowfall, there is a problem that tire slippage occurs, which makes running difficult, and local wear of the tire occurs, which shortens the service life.

An object of the present invention is to provide a device for removing snow from the running surface of a steel track girder. In particular,
It is intended to improve the heat transfer efficiency of the traveling plane plate, melt a wide range of snow with a low-capacity heating element, and enable snow removal even when part of the heater is disconnected.

[0005]

In order to achieve the above object, the heater main body is formed into a shape that comes into surface contact with a heating surface, and heat conduction plates are provided at both ends of the bending point of the wire connecting portion of the abdominal plate in the track beam. It is provided such that the exposed portion of the anti-contact surface is surrounded by a heat insulating material, and the heater body and the heat insulating material are closely attached to the back surface of the running surface via a trough. In addition, a plurality of heating elements of the heater are arranged, the plurality of abdominal plates are connected to each other in series by electric wires, and unit wirings are connected in series, and the parallel connection points of the plurality of unit wirings are staggered in a staggered arrangement.

[0006]

The exposed portion of the anti-contact surface of the heater is covered with the heat insulating material, and the running surface is heated by the direct heat transfer on the back surface of the running surface, so that the heat transfer efficiency is high. Further, since the length of the laid heater is set to the length between the webs of the girder, it is easy to install and maintain the heater with the trough. Further, since the unit wiring is formed by connecting wires between the girder abdominal plates and connected in series with each other, even if there is a break in one side of the heater, it is possible to remove snow in the traveling area by heating the heater on the other side.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a steel track girder, and FIG. 2 is a plan view for explaining the heater attachment of FIG. 3 is a sectional view taken along the line of FIG. 1, and FIGS. 4 and 5 are a sectional view and a side view showing a trough structure of the heater. 10 box-shaped steel track girders have 1 running plate, 2 guide wheels, 3 stable wheels,
4, a belly plate with a manhole hole 7 and a lower plate 5 and 6 are reinforced. Reference numeral 8 denotes a compound-wheel type rubber tire on the vehicle side. Reference numeral 9 denotes a heater main body having a heat generation capacity of about 60 w / m, which is laid near the center of the rubber tire 8, and has a triangular cross section. Reference numeral 12 is a bent portion of the end surface of the heater body 9 and has a length that can be accommodated between the abdominal plates 4. Reference numeral 13 is a heat conductor made of an aluminum material or the like, and is used for the heater body 9 near the bent portion 12.
It makes a surface contact with the flat running surface flat plate 1 and has a relatively large cross-sectional area to increase the heat retention. Reference numeral 16 is a non-flammable heat insulating material that covers the exposed portion of the heater body 9. Reference numeral 15 denotes a non-combustible solid material, which supports the heat conductor 13 and the heater body 9. Reference numeral 14 is a trough, and a bracket 17 is fixed to the reinforcement 6 so that a heat insulating material 16 is formed.
The heater main body 9 covered with is brought into contact with the traveling surface flat plate 1. Reference numeral 11 is a unit wiring, and the abdominal plate 4 of the girder is connected to the connecting box 19 with the two heater main bodies 9 as one unit by a crossover electric wire 18. As shown in FIG. 2, the heater wires are connected by staggering the connection points so that the unit wires 11 arranged on the left and right near the center of the rubber tire are connected in parallel. Reference numeral 20 is a lead-in supply wiring, and 21 is a manhole for entering the steel track girder 10 from the outside. The axle load of the large-sized saw-toothed monorail vehicle in this embodiment is 11 tons, the steel track girder 10 has a girder width of 850 mm, and the running surface flat plate 1 has a minimum plate thickness of 19 mm.

In the above structure, since the back surface of the heating element of the heater body 9 is covered with the heat insulating material 16, the steel track girder 10 is provided.
There is little heat loss radiated inside, for example outside temperature -10 ° C
At this time, the running surface temperature due to the heating of the heater body 9 becomes about 15 ° C. at the heater position after a few minutes. If the vehicle is preheated at night when the outside air temperature is lowered and snowfall is a concern, or if the snowfall is sensed and heating is started, the running surface flat plate 1 does not reach the snowfall state. Further, even in the abdominal plate portion 4 on which the heater main body 9 is not laid, the heat conductors 13 are arranged close to the abdominal plate 4, so that these serve as a pseudo heat source, the heat transfer range is expanded, and the snow removal range is reduced. There is a widening effect. The heater main body 9 is laid near the rubber tire 8 across the abdominal plates 4 arranged in two, and the unit wiring 11 is connected in series by the electric wire 18.
Since the parallel connection points of the plural unit wirings 11 are staggered in a staggered arrangement, even if there is a disconnection on one side of the heater, heating of the other side of the heater can erase the snow on the running surface. There is also.

[0009]

According to the present invention, it is possible to remove snow on the track running surface, and it is not necessary to remove snow from the track girder running surface even during snowfall. No slippage enables normal operation. In addition, the tire has no effect of sliding wear locally generated, and has the effect of extending the life of the tire.

[Brief description of drawings]

FIG. 1 is a side view showing the inside of a steel raceway girder according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a sectional view taken along the line AA in FIG.

FIG. 4 is a sectional view showing a trough structure of a heater.

FIG. 5 is a side view of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Running surface flat plate, 4 ... Belly plate, 8 ... Rubber tire, 9 ... Heater main body, 10 ... Box-shaped cross-section steel track girder, 11 ... Unit wiring, 13 ... Thermal conductor, 14 ... Trough, 16 ... Heat insulating material, 1
8 ... Migration wire.

Claims (2)

[Claims] 1. A steel track girder having a box-shaped cross section, a running surface for a vehicle with rubber tires having a flat plate shape, and a track girder in which the back surface of the running surface of the girder inner surface is heated by an electric heater is laid between the inner plates of the track girder. The heater body has a heat conduction plate on the end face and is in surface contact with the mounting surface. The exposed portion of the heater body non-contact surface is surrounded by a heat insulating material, and the heater body and the heat insulating material are passed through a trough to form a flat plate. Snow removal device for track girders, which is closely attached to the back surface. 2. The heater body laid between the abdominal plates in the girder according to claim 1, wherein a plurality of single wire heating elements are arranged near the center of the rubber tire, and the plurality of abdominal plates of the track girder are connected in series by an electric wire. In addition, the snow melting device for track girders is characterized in that the parallel connection points of a plurality of unit wirings are staggered in a staggered arrangement.