SU931543A1 - Release valve of railway vehicle brake - Google Patents

Description

(5) RAILWAY BRAKE VALVE

- I .-; . ;

FIELD OF THE INVENTION The invention relates to rail transport and relates to the arrangement of brake release valves for a rail vehicle.

A release valve is known, comprising a housing with a pusher disposed therein with a spring-loaded valve and a piston interacting with a movable partition of the air distributor separating the control pressure chamber from the chamber connected to the brake line and bounding the cavity walls, one of which communicates with the cavity above the spring-loaded valve, and the other communicated via a channel in the piston with the control pressure chamber and separated from the atmospheric cavity 1.

The disadvantages of this release valve are an increase in the time it takes to release compressed air from the control pressure chamber in the brake by / VEHICLE

. manually, for example, when changing pads. on one train of the train en route, and its reliability is low.

The purpose of the invention is to improve the reliability of the outlet valve by simplifying the design.

This goal is achieved by the fact that the channel connecting the cavity

10 above the spring loaded valve with a control pressure chamber.

In addition, the release valve is equipped with a spring-loaded valve mounted on the piston from the atmosphere side of the cavity.

The drawing shows the proposed valve, the overall appearance.

The drain valve includes a housing G, a pusher 2, a spring-loaded valve Pan 3, a piston. The piston k bounds with the walls of the housing 1 of the cavity 5 and 6 and rests in the movable partition 7 of the air distributor 8.

The movable partition 7 is a compartment of the chamber 9 of the control pressure from the chamber 10, communicated through a two pressure circuit (not shown) of the air distributor with the brake line (not shown). A piston 11 is formed in the piston, which constantly communicates the cavity 6 with the chamber 9 of the control pressure. A valve 12 is mounted on the piston, separating the cavities 6 from the atmospheric cavity 13, which is connected with the atmosphere by a throttle orifice T.

A spring 15 is installed between the housing 1 and the valve 12. The cavity 5 is permanently in communication with the cavity 16 above the spring-loaded valve 3 and with the control pressure chamber 9 through the channel 17. The cavity 18 is spring-loaded, the valve 3 is constantly in communication with the atmosphere.

When the brake is charged, the compressed air from the brake line enters the chamber 10 through the body of two pressures of the air distributor 8, as well as into the chamber 9 of the control pressure.

The movable partition 7 and the piston occupies the leftmost position (according to the drawing). At the same time, compressed air from chamber 9 through channel 11 of piston k enters cavity 6, and through channel 17 into cavity 5.

During braking, the pressure in the brake line and, consequently, in the chamber 10 is relieved. Since the two pressure body at this moment overlaps the message of the control pressure chamber 9 with the chamber 10, the movable partition 7 under the air pressure in the chamber 9 moves to the right (according to the drawing) . In this case, the piston is held in the leftmost position (according to the drawing), since the force of the spring 15 is chosen to be less than the force of the compressed air in the chamber 9 per valve area 12, which is equal to its area from the atmospheric cavity 13 for example, cars, after uncoupling the locomotive, briefly press the pusher 2. The cavity 5 through the opened spring-loaded valve 3 communicates with the atmosphere.

The piston (under the force of compressed air in the cavity 6 moves to the right (along the circle). The valve 12 opens. Compressed air from the control pressure chamber 9 through channel 11, cavity 6 enters the atmospheric cavity 13 and further through the orifice 1 into the atmosphere Since the throttle hole k is smaller than the opening of the open valve 12, then in the cavity 5, 6 and 13 and the chamber 9 the same air pressure and the piston is held in the rightmost position, at which the valve 12 is open, due to the force of the spring 15.

After the pressure in the chamber 9 has decreased to the value of the pressure in the chamber 10, the movable partition 7 moves to the left (according to the drawing). Brake release will occur. When moving to the left, the movable partition 7 moves the piston f and the valve 12 closes.

In the case when it is necessary to reduce the pressure in the chamber 9 of the control pressure when it is recharged

5, in the released brake position, push the pusher 2, lift the spring-loaded valve 3. The chamber 9 through the channel 17 and the open valve 3 is connected to the atmosphere. Compressed air is released from chamber 9 until the required charge pressure is established in it. To manually release the air from the chamber 9 in the brake position, when such a need arises in operation, also push the pusher 2, opening the spring-loaded valve 3, and chamber E communicates with the atmosphere through the channel 17.

The presence in the proposed valve of the valve mounted on the piston and separating the half connected to the control pressure chamber is from the atmospheric cavity and the spring supported in the piston from the side of the said valve as well as the permanent connection of the cavity communicated with the cavity above the spring-loaded valve, with Cameras and control pressure increases the reliability of the release valve, since it eliminates the possibility of spontaneous transition to the inoperative position, reduces the possibility of leakage of compressed air from the control chamber pilot pressure and

5 it is possible to quickly force air out of the control pressure chamber manually in any brake condition, if

Claims (2)

Claim 931543 in the gas separator separating the control pressure chamber from the chamber in communication with the brake line and bounding with the cavity body walls, one of which communicates with the cavity above the spring-loaded valve, and the other communicates through the piston channel with the control pressure chamber and is separated from the atmospheric cavity This is due to the fact that, in order to increase its reliability by simplifying the design, a channel is made in the housing connecting the cavity above the valve with the control pressure chamber. 2. Valve pop. 1, characterized in that it is equipped with a spring-loaded, valve, mounted on the piston from the side of the atmospheric cavity. I.. 1. The brake valve of a railway vehicle containing a housing with a pusher placed in it with a spring-loaded valve and a piston interacting with the movable partition of the air distribution