JP3045488B2 - Axle heating train emergency stop device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an axle-heating train emergency stop device for detecting an abnormal rise in the temperature of an axle bearing of a railway car, particularly a freight car, and stopping the train to prevent train derailment due to axle fusing.

[0002]

2. Description of the Related Art If an axle bearing or the like is damaged during running of a train, the bearing may be further deteriorated due to heat generation due to an increase in rotational resistance, which may lead to derailment of the train due to axle fusing. For this reason, in a high-speed vehicle such as a bullet train, a device has been put into practical use in which a bearing temperature switch is provided in each axle box or the like, and an alarm is issued to a train driver's seat when the temperature of the bearing or the like rises abnormally. The bearing temperature switch has electrical contacts that are always short-circuited (or open) and a plunger in which the push-up spring is killed by a special low-temperature molten alloy. Ascending opens the electrical contact (or shorts),
A change in the current flowing there is transmitted to the driver's seat via an electric wire of the train, and the alarm device is operated.

[0003]

However, as described above, this bearing temperature switch is premised on a railway vehicle provided with an electric line, and cannot be applied to a general freight car having no electric line. was there. Further, even if the bearing temperature switch is operated, if the warning is overlooked by the train driver, the axle may be melted. The present invention solves such a problem, and can be applied to a railway vehicle having no electric service line.When an abnormal temperature rise is detected, the emergency brake of the train is automatically operated to reliably cut off the axle. An object of the present invention is to provide an emergency stop device for an axle heating train that can be prevented.

[0004]

An axle-heating train emergency stop device according to the present invention is provided in a bearing portion of a railway vehicle and opens in two directions, one of which has a high temperature. And a pneumatic pipe connecting the other opening of the thermal fuse valve and the brake pipe of the railway vehicle.

[0005] Further, a discharge valve is provided in the middle of the air pipe, and detects a decrease in air pressure on the temperature fuse valve side and releases the air pressure on the brake pipe side to the atmosphere. And

[0006] Furthermore, the discharge valve is characterized in that the discharge valve is provided with a sign which can easily identify that the discharge valve has operated.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a piping diagram showing a configuration of an embodiment of an axle-heating train emergency stop device according to the present invention. In this embodiment, a railway vehicle (shown in FIG. ), Four sets of temperature fuse valves 3 provided in close contact with each of the four sets of shaft spring devices 2 of the truck 1, a discharge valve 4 installed on the body of the railway vehicle, for example, and this discharge valve And a discharge port 4 through a secondary air pipe 5-2 including a clearance section 5-3 for communicating the secondary side port (EP) 4 with the four sets of temperature fuse valves 4 and a shutoff cock 6. A primary air pipe 5-1 is provided for communicating the secondary port (BP) with the brake pipe 7 of the railway vehicle.

FIG. 3 is a cross-sectional view showing an example of the structure of the thermal fuse valve 3. The thermal fuse valve 3 is closely attached to the shaft spring device 2 with, for example, a thread 3-1 so as to have low thermal resistance. Have been. Thermal fuse 3 communicates with 2
Three openings 3-2 and 3-3, and one opening 3-
2, one end of the secondary side air pipe 5-2 is connected, and the other opening 3-3 is sealed with a stopper 3-4 made of, for example, a lead alloy that melts at about 180 ° C.

The discharge valve 4 has a structure in which when the pressure at the secondary port drops below the pressure at the primary port, this is detected and the primary port is released to the atmosphere.

[0010] In the event that the bearing portion close to the shaft spring device 2 is damaged during running of the train and generates heat due to the rotation of the axle, this heat is transmitted to the thermal fuse 3 via the shaft spring device 2 and in the above example, the temperature is reduced. When the temperature of the fuse 3 rises to 180 ° C. or more, the melting plug melts and the pressure air in the secondary air pipe 5-2 leaks to the atmosphere, and the pressure in the secondary port of the discharge valve 4 communicating therewith increases. descend. As a result, the discharge valve 4 operates, the pressure air in the brake pipe is released to the atmosphere through the primary air pipe 5-1 and the emergency brake device of the train operates.

As described above, according to the axle-heating train emergency stop device according to the present embodiment, even if the bearing portion is damaged during traveling, the train can be safely stopped before the heated axle is melted. be able to.

When the emergency brake of the train is actuated and stopped due to axle heat, the discharge valve 4 is coated with, for example, reflective paint so that the crew of the train can easily find the cause and the location where the cause has occurred. It is preferable that the printed thin film is provided with a sign that can be easily recognized from the outside such that the printed thin film is attached to the discharge port so as to be broken when the discharge valve 4 is operated.

Although the configuration and operation of the present invention have been described based on the embodiment shown in FIG. 1, the present invention is not limited to this embodiment. The air discharge resistance of the temperature fuse valve 3 may be reduced and the discharge valve 4 may be omitted.

[0014]

As described above, according to the present invention, the present invention can be applied to a railway vehicle having no electric lead-in line, and automatically activates the emergency brake due to axle heat, thereby warning the crew. It is possible to provide a simple and safe axle-heating train emergency stop device that does not require oversight.

[Brief description of the drawings]

FIG. 1 is a piping diagram showing a configuration of an embodiment of an axle heating train emergency stop device according to the present invention.

FIG. 2 is a side view of a bogie showing an installation example of the embodiment of FIG. 1;

FIG. 3 is a sectional view showing a structural example of the thermal fuse valve 3 of FIG.

[Explanation of symbols]

 Reference Signs List 1 cart 2 shaft spring device 3 thermal fuse 3-1 screw thread 3-2, 3-3 opening 3-4 tap 4 discharge valve 5-1 primary air pipe 5-2 secondary air pipe 5- 3 Possible part 6 Dead cock 7 Brake pipe

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Koji Asakura 2-3-1 Koraku, Bunkyo-ku, Tokyo Inside Japan Freight Railway Co., Ltd. (56) References JP-A 64-21597 (JP, A) JP-A Hei 9-79915 (JP, A) Japanese Utility Model Hei 4-48079 (JP, U) Japanese Utility Model Showa 62-137145 (JP, U) Japanese Utility Model Showa 48-30452 (JP, U) (58) Fields surveyed (Int) .Cl. ⁷ , DB name) B61H 13/00 F16D 66/00 F16K 31/64-31/72 F16K 17/36-17/42

Claims (2)

(57) [Claims] Claims: 1. A railway vehicle is provided on a bearing portion of a railway vehicle and is opened in two directions.
One of the openings is melted by high temperature.
A temperature fuse valve sealed with a material that melts;
Air piping that communicates with the, It is provided in the middle of this air pipe,
Of the air pressure on the brake pipe side
A discharge valve that releases pressure to atmosphere Characterized by having
Axle heating train emergency stop device. Wherein said discharge valve, claims, characterized in that the discharge valve is provided with a label that can be easily identified that the operating
Axle heating train emergency stop device according to 1.