JPH09256307A - Rail heating car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make efficient and precise operation with a small number of workers possible for a device that is used for heating a rail to a specified temperature on fixing the rail to a sleeper. SOLUTION: Trucks 1 and 2 equipped with wheels 8 capable of traveling on rails 9 laid on sleepers 28, a burner 4 fixed in facing the rails 9 to brackets 12 provided at the trucks 1 and 2, a nonconact type temperature sensor 11 provided in facing the rails 9 at the brackets 12 provided at the trucks 1 and 2 at a position separating at a specified distance in the longitudinal direction from the position where the burner 4 is laid, a temperature display part 24 for showing the temperature measured by the temperature sensor 11, a variable speed motor 13 for driving at least one of the wheels 8, and a controller 25 for controlling the speed of the variable speed motor 13 are provided. The temperature of the heated rail 9 is detected by the temperature sensor 11 and displayed on the display part 24. The traveling speed of the trucks 1 and 2 is controlled so that the detected temperature becomes a set temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device used to heat a rail of a railway to a sleeper when the rail is fixed to a sleeper.

[0002]

2. Description of the Related Art Railroad rails expand and contract due to thermal expansion as the outside air temperature changes. High-speed railways these days use very long seamless rails, so they are firmly fixed to the sleepers so that the rails do not expand or contract. Therefore, an axial stress due to thermal expansion occurs inside the rail due to the temperature change. When the temperature rises, the rail is forcibly compressed, so compressive stress occurs in the rail, and conversely, when the temperature becomes low, the rail is forcibly stretched. Tensile stress is generated inside. Since the rail is usually made of iron and the iron has almost the same strength on the tension side and the compression side, it is preferable to fix the rail at a temperature between the maximum temperature and the minimum temperature of the expected rail. Become. This intermediate temperature is about 25 degrees, and when laying a rail in a normal area, the rail temperature is fixed to 25 degrees with the rail temperature kept at 25 degrees. Since the rails are exchanged at night when the vehicle is not running, it is necessary to heat the rails when fixing the newly installed rails to the sleepers, and a rail heating car is used for that purpose.

A conventional rail-heated vehicle has a simple structure in which a hand-held trolley capable of traveling on the rail is equipped with a gas burner facing the rail. Propane gas cylinders mounted on the trolley supply propane gas to the burner. The rails are then heated by burning with a burner. An operator heats the rail while pushing the trolley slowly, and another worker measures the temperature of the rail after the trolley passes by a surface thermometer, and temporarily fixes it on the sleepers when the temperature reaches 25 degrees. The rails are installed by firmly fastening the previously used rails to the sleepers. Therefore, two workers are required for heating the rail and measuring the temperature, and since the rail tends to be overheated, there is a problem that work efficiency is likely to decrease. Especially on a main line where a large number of vehicles run, rails must be replaced during a few hours during which trains run at night, so improvement in work efficiency is required.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides a device capable of heating a rail to a set temperature while traveling on the rail temporarily fixed on the sleeper, so that the rail can be installed at the time of installing the rail. It is an object of the present invention to be able to perform the heating of the above with a small number of people more efficiently and accurately.

[0005]

A rail heating vehicle according to claim 1 is provided with trolleys 1 and 2 provided with wheels 7 and 8 capable of traveling on a rail 9 installed on a sleeper 28, and provided on the trolley. Burner 4 fixed to the above bracket toward the rail
And a non-contact type temperature sensor 11 installed toward the rail 9 on a bracket 12 provided on the carriages 1 and 2 at a predetermined distance from the installation position of the burner 4 in the rail longitudinal direction.
A temperature display unit 24 that displays the temperature measured by the temperature sensor 11, a variable speed motor 13 that rotationally drives at least one of the wheels, and a controller 25 that controls the speed of the variable speed motor. It is characterized by that.

According to a second aspect of the present invention, in the rail heating vehicle according to the first aspect, two bogies 1, which are connected to each other,
2, a burner 4 is provided on one of the trucks 1, a drive wheel 8
Is provided on the other carriage 2.

[0007]

[Function] The rail 9 installed temporarily on the sleeper 28
Is heated by the burner 4 as the rail heating car travels.
The burner 4 supplies fuel gas from a propane gas cylinder 6 mounted on the trucks 1 and 2. The fuel is not limited to propane gas, and a kerosene burner or the like can be used, but it is convenient to use propane gas which has been generally used conventionally.

The temperature of the heated rail 9 is equal to that of the carriages 1 and 2.
The temperature is detected by the non-contact type temperature sensor 11 mounted on the. As this temperature sensor, for example, an infrared thermometer can be used. The burner 4 and the temperature sensor 11 are
Since the rails are installed at a predetermined distance from each other, the temperature of the rail is made uniform by heat conduction and heat radiation during this period. In order to secure the distance L necessary for equalizing the temperature and to avoid the truck from becoming large, the burner truck 1 and the temperature sensor installation truck (driving truck) 2 are separated and connected to each other. Can be adopted. Since the rail heating vehicle usually has to be manually installed on the rail or removed from the rail, it is important to reduce the size and weight of one truck.

The temperature of the rail detected by the temperature sensor 11 is displayed on the display unit 24. By controlling the controller 25 according to the detected temperature, that is, if the temperature is higher than the set temperature, the controller 25 is operated to the high speed side to increase the traveling speed of the carriages 1 and 2. If the detected temperature is lower than the set temperature, the controller 25 is operated to the low speed side to reduce the traveling speed of the carriages 1 and 2. By such an operation, the detected rail temperature is promptly fed back to the traveling of the carriages 1 and 2, so that the carriages 1 and 2 are
Since the rail temperature immediately after traveling can be kept within the allowable range of the set temperature, the rails can be fastened to the sleepers one after another immediately after the truck has traveled without having to measure the rail temperature again. You can go.

In order to reduce the weight of each carriage, when the carriage is composed of two or more carriages connected to each other,
In order to level the weight of each truck, it is appropriate that the drive wheels 8 are provided on the truck not equipped with the burner 4.

[0011]

1 to 3 show an embodiment of a rail heating car according to the present invention. The rail heating vehicle of this embodiment includes two carriages 1 and 2, both of which are connected by a connecting machine 3. The connector 3 has a U-shape in a plan view, and both ends thereof are connected to both sides of one carriage 1 having a width slightly wider than the width of the rail to prevent the carriage from falling. A burner 4 is attached to one of the carts 1 via a bracket 5. Three burners 4 are provided, and their tips are directed to the upper surface and both side surfaces of one rail.
Fuel gas is supplied to the burner 4 from a gas cylinder 6 mounted on the other truck (driving truck 2). Links that cannot be swung upward are provided in front of and behind the burner (in the extending direction of the rail), and a collared wheel that rolls on the rail is pivotally attached to the tip of the link. The coupling machine 3 and the drive cart 2 are detachable, and when heating the rail on the opposite side, the coupling machine is removed and the burner cart 1 is placed on the rail on the opposite side, and the coupling machine 3 is driven. Secure on the opposite side of. At this time, the infrared thermometer described later also moves to the opposite side.

The drive carriage 2 includes driven wheels 7 and drive wheels 8. The wheels provided on the burner truck 1 are all driven wheels. A non-contact type infrared thermometer 11 facing one rail 9 is attached to the drive carriage 2 via a bracket 12. A variable speed motor 13 with a speed reducer is mounted in the vicinity of the drive wheel 8. The chain sprocket 14 provided on the output shaft of this motor and the axle 15 of the drive wheel 8 are rotatable and axially movable. The driven sprocket 16 mounted is connected by a chain 17. A clutch pawl 18 is provided at one end of the boss of the driven sprocket 16, and a driven side clutch pawl 19 facing the clutch pawl is fixedly provided on the axle 15 of the drive wheel. A lever 21 for moving the driven sprocket 16 in the axial direction is connected to the driven sprocket 16.
That is, the lever 21 and the clutch pawls 18 and 19 constitute a manual clutch, and the operation of the lever 21 causes the variable speed motor 13 and the drive wheel 8 to be connected and disconnected. Electric power is supplied from the generator to the variable speed motor 13 by mounting a generally commercially available portable generator 22 driven by a gasoline engine on the drive carriage 2.

If the variable speed motor fails or moves faster than the variable speed motor, the clutch is disengaged and the variable speed motor is moved manually. Further, when the rail at the work site is gently inclined, it can be operated as a brake by keeping the clutch engaged.

An operation panel 23 is mounted on the drive carriage 2,
On the operation panel 23, the temperature of the rail 9 measured by the infrared thermometer 11 is digitally displayed on the display unit 24, and a controller 25 for controlling the rotation speed of the variable speed motor 13 together with a power switch of the variable speed motor 13 and the like. Is installed. A steering wheel 26 for supporting the body of the driver and a step 27 are provided in the vicinity of the operation panel, and while the driver on the step 27 is watching the digitally displayed temperature, the temperature is higher than the set temperature. If the temperature is higher, the knob of the controller 25 is operated to the acceleration side, and if the temperature is lower than the set temperature, the controller 25 is operated to the deceleration side to control the traveling speed of the carriage 2. In the apparatus of this embodiment, manual control is performed in order to provide the apparatus at low cost, but the controller 25 may be automatically controlled by automatically detecting the difference between the set temperature and the measured temperature by microcomputer control or the like. Of course it is possible.

The rail heating car constructed as described above is placed on the rail 9 which is fastened on the sleeper 28 by the bolts 29 so as to be slidably moved by thermal expansion, and the burner 4 is ignited to move the burner 4 forward. Rail 9 by running
Is heated to a predetermined temperature, the bolts 29 are tightened immediately after the rail heating vehicle travels, and the rails 9 are installed by firmly fastening them to the sleepers 28 so that the rails do not expand or contract due to thermal expansion.

Installation and removal of the rail heating car on the rail 9 are performed with the bogies 1 and 2, the gas cylinder 6 and the generator 22 separated, and the rails 9 and 2 are connected on the rail 9 and the gas cylinder 6 is removed. And the generator 22 is installed on the carriages 1 and 2.

[0017]

According to the rail heating car of the present invention described above, one operator can perform heating to the set temperature of the rail and confirmation of the heating temperature, and labor can be saved. In addition, since the traveling speed of the rail heating car can be controlled finely and accurately so that the rail temperature is maintained at the set temperature, it is possible to reduce variations in rail temperature and to overheat the rail. Since it can be avoided, work efficiency is also improved. In addition, the work such as installing the rail heating car on the rail or the work of removing it from the rail does not require a device such as a crane and can be installed and removed manually like the conventional rail heating car. Is.

[Brief description of drawings]

FIG. 1 is a plan view of a rail heating car according to the present invention.

FIG. 2 is a front view of the rail heating vehicle of the present invention.

FIG. 3 is a side view of the rail heating vehicle of the present invention.

[Explanation of symbols]

 1 Burner Cart 2 Drive Cart 4 Burner 7 Driven Wheel 8 Drive Wheel 9 Rail 11 Infrared Thermometer 12 Bracket 13 Variable Speed Motor 24 Display 25 Controller 28 Sleepers

Claims (2)

[Claims] 1. A trolley (1,2) equipped with wheels (7,8) that can travel on a rail (9) installed on a sleeper (28), and a bracket provided on this trolley on the rail. Fixed to the burner (4) and a bracket provided on the truck (1, 2) at a predetermined distance from the installation position of this burner (4) in the longitudinal direction of the rail.
A non-contact type temperature sensor (11) installed toward the rail (9) in (12), a temperature display section (24) for displaying the measured temperature of the temperature sensor (11), and at least the wheel. A rail heating vehicle comprising a variable speed motor (13) for rotationally driving one and a controller (25) for controlling the speed of the variable speed motor. 2. A drive wheel (8) comprising two carriages (1,2) connected to each other, the burner (4) being mounted on one of the carriages (1).
Is provided on the other carriage (2),
The rail heating car according to claim 1.