JPS60229855A - Security brake in railway vehicle - Google Patents

Abstract

PURPOSE:To prevent troubles due to inoperation caused by, for example, neglect of duty or erroneous operation by a crewman, by eliminating a power source circuit exclusively used for a security brake, and by incorporating such a circuit in a circuit for an emergency brake. CONSTITUTION:A power source for a wiring 110 is cut off when a contact 13 in a brake valve 12 in a leading vehicle A is moved to a position E or when an electrical contact in an emergency brake switch 15 is turned off. Solenoid valves 5, 8 establish pneumatic circuits when the power source for the wiring 110 is cut off, and therefore pressure is fed into a relay valve 6 and a selector valve 9. Thereby the valves 6, 9 feed pressurized air into circuits 6', 9', and therefore, pressurized air is fed into a circuit 11 through a valve 10 to brake a vehicle. In this case, the air pressure in the circuit 6' is set to be slightly higher than that in the circuit 9' to be used for emergency brake operation, thereby, when the power source is cut off, emergency brake operation is effected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a safety brake device provided in an electric command type brake device for a railway vehicle.

[Background of the invention]

The safety brake device installed in conventional vehicles is installed as a backup for regular and emergency brakes, but as a circuit dedicated to the safety brake, the brake will operate if the safety brake switch is not operated. I couldn't. Therefore, if the service and emergency brakes do not work due to a mechanical problem, it is necessary for the crew to operate the safety brake switch at their own discretion.If this is not done, the brakes will not work on the vehicle. , it had the disadvantage of being dangerous.

[Purpose of the invention]

In view of the above points, it is an object of the present invention to ensure the safety of a vehicle by automatically operating a safety brake during regular and emergency brake operation.

[The need for invention]

What has not yet been invented is a supply reservoir and a security reservoir that are connected to the main air reservoir circuit via a check valve, and the air circuit is opened when the power is cut off, replacing the supply reservoir and the safety reservoir. A solenoid valve, a relay valve connected to the solenoid valve on the side of the safety reservoir, a switching valve connected to the solenoid valve on the safety reservoir side, and the relay valve and the switching valve are connected to each other, and the relay valve and It is characterized by comprising a double check valve that supplies the higher pressure air supplied from the switching valve to the brake cylinder.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 shows an air circuit diagram, where 1 is a main air reservoir circuit, 2 is a check valve, and pressurized air is stored in a supply reservoir 3 and a safety reservoir 4.

Reference numerals 5 and 8 designate electromagnetic valves which close an air circuit when closed and form an air circuit when open, and their air pressure is transmitted to relay valve 6 and switching valve 9. The relay valve 6 has a structure that transmits the air pressure of the air circuit 3' (a descendant of the air circuit 3') to the circuit 6' according to a command from the mm valve 5.

On the other hand, the switching valve 9 receives pressurized air whose pressure has been regulated by the pressure reducing valve 7 provided in the middle of the air circuit 4), and the solenoid valve 8.
The structure is such that the pressure air command is transmitted to the circuit 9'. Reference numeral 10 denotes a double check valve, which is constructed to transmit the higher pressure of circuit 6 or 9 to circuit 11. In this case, the circuit on the lower pressure side is cut off. The circuit 11 is connected to a brake cylinder (not shown) of the vehicle, the actuation of which allows the vehicle to be braked.

Next, FIG. 2 shows an electric circuit. In addition, here A, B
, in a three-car formation of C, the person is in the lead car, B is in the middle car, and C
will be explained as a final sample. Line 103 is a power line, which runs the entire length of the train. In the leading car A, power is turned on to the front/rear switch 14 via the line 104 by closing the brake valve. The V front/rear selector 14 is set at the F position in the leading driver, and is connected to the intermediate wheel B and the last specimen C via a line 105, an emergency brake switch 15, and a crossover wire 16. In the last sample C, the 1 forward/backward switch 14 is set to the R position, so that the solenoid valves 5 and 8 are energized via the line 110 when the power is turned on, and power can be supplied to the first person. Note that in the excited state, the solenoid valves 5 and 8 close their air circuits, so that no pressurized air is supplied to the relay valve 6 and the switching valve 9 in FIG. 1, and the brake is in a relaxed state.

In such a configuration, by moving the contact 13 of the brake valve of the lead vehicle A to the E position, or by cutting off the electrical contact of the emergency brake switch Y-15, the line 11
0's power is cut off. When the line 110 power is cut off, the solenoid valves 5 and 8 form their air circuit and supply pressurized air to the relay valve 6 and the switching valve 9. As a result, the relay valve 6 and the switching valve 9 supply pressurized air to the circuits 6' and 9', and supply pressurized air to the circuit (2) via the double check valve 10, thereby applying the brakes to the vehicle. be able to. In this case, air pressure is transferred from circuit 9' to circuit 6'.
By setting the brake side to a high level and using the emergency brake, air pressure for the emergency brake will always be supplied to the brake cylinder when the power is cut off.

Therefore, the supply reservoir 3. Solenoid valve5. If the emergency brake does not work when the power is turned off due to a malfunction in the relay valve 6, etc., pressurized air from the circuit 9' side will be supplied to the brake cylinder, so it is safe to avoid problems such as brake activation. It is.

〔Effect of the invention〕

As explained above, according to the present invention, by abolishing the conventional power supply circuit dedicated to the safety brake and incorporating it into the emergency brake circuit, safety can be prevented due to crew negligence or poor handling. This can prevent problems caused by brake failure.

[Brief explanation of drawings]

FIG. 1 is a pneumatic circuit diagram of an embodiment of a safety brake according to the invention, and FIG. 2 is an electrical circuit diagram of an embodiment of a safety brake according to the present invention. 1... Main air reservoir circuit, 2... Check valve, 3... Supply reservoir, 4... Security reservoir, 5.
8...Solenoid valve, 6...Relay valve, 7...
...Pressure reducing valve, 9...Switching valve, 10...
・Double check valve

Claims (1)

[Claims] 1 Installed in each main air reservoir circuit via a check valve.
a solenoid valve that opens an air circuit when the power is cut off and is connected to the supply reservoir and the safety reservoir; a relay valve connected to the solenoid valve on the supply reservoir side; A switching valve connected to a solenoid valve on the reservoir side, and a dual check valve connected to the relay valve and the switching valve and supplying the higher pressure air from the relay valve and the switching valve to the brake cylinder. A safety brake device for railway vehicles consisting of: