SU1630936A1 - Electropneumatic valve block of antiskid device - Google Patents

Abstract

The invention relates to devices that provide pressure relief in the brake cylinders of a vehicle when wheel pairs occur. The purpose of the invention is to increase braking efficiency by providing a three-phase operation mode of the valve assembly. The electro-pneumatic valve assembly includes a two-week element dislocated in the housing 1 spring-loaded and has an opening communicating with the atmosphere, limiting the chamber 4 connected to the air distributor and abutting the spring-loaded movable partition 5. The cavity under the partition 5 communicates with the brake amp;

Description

ABOUT

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cylinder. Electromagnetic valve 7 communicates cavity 10 with atmospheric channel 9, bypass channel 11, which communicates cavity 10 with an air distributor, and is equipped with a solenoid valve 12. Channels 9 and 11 are equipped with throttles 14 and 15., 1 zp. f-ly, 1 ill.

The invention relates to a device for depressurizing pressure in the brake cylinders of a vehicle when the wheelset is fitted and can be used in brake systems, mainly in railway transport.

The purpose of the invention is to increase the braking efficiency by providing a three-phase mode of operation of the valve assembly.

The drawing shows a functional diagram of the valve assembly.

The assembly contains a double-seated valve element 3 placed in the housing 25 1., spring-loaded and having an opening 2 connected to the atmosphere, bounding the lower chamber 4 connected to the air distributor, up and down JQ in the spring-loaded movable partition 5. The cavity b under the partition 5 communicated with the brake cylinder. The solenoid valve 7 with a locking element 8 communicates with the atmospheric channel 9, the cavity 10 above the movable partition 5. The first channel 11 communicates the cavity 10 with the chamber 4 and the air distributor. A solenoid valve 12 with a locking “Q” element 13 is built into channel 11. Throttles 14 and 15 are built into channels 9 and 11. The windings of valves 7, 12 are connected via oppositely connected diodes 16 and 17 to an electrical circuit. .with

Valve node works as follows.

In the absence of VU, the electrical voltage on the solenoid valves V and 12 through diodes 16 and 17 is not supplied. Compressed air from the air distributor freely passes through the intake valve of the double-seat valve element 3 in the brake cylinder that is open while filling the air. At the same time, the air passes through 55 throttle 15 and valve 12 into the cavity 10 without changing the position of the movable partition 5.

When a gas device arises from the device, counter diodes 16 and 17 are fed in from the electrical supply source and the electromagnet valve 7 is excited, attracting element 8 through the measles, and communicating the cavity 10 through the choke 14 with the atmosphere. Throttles 14 and 15 are selected in such a way that non-. A view of the pressure coming from the air distributor into the cavity 10; the pressure in the latter drops at a predetermined rate through the open valve 7.

Moving wall 5, overcoming the force of the spring, moves up with element 3, breaking the connection between the air distributor and the brake cylinder and communicating the latter with the atmosphere to discharge at a given rate.

When the polarity is changed by the anti-body device under the conditions of movement of the wheelset and the minus is supplied to the diodes 16 and 17, the solenoid valve 7 is de-energized by stopping the discharge of the cavity 10 and the valve 12 is energized by interrupting it from the air distributor. By decreasing the pressure in the brake cylinder, the movable partition 5 moves downwards, closing the atmospheric opening in the element 3. The overlapped mode begins.

After removing the electrical supply from the anti-gas device, the valve 12 is de-energized and through the opening element 13, with continued braking into the cavity 10, it expels the secondary air from the air-distribution. tel. The movable partition 5, moving down with the element 3, communicates through the last air distributor with the brake cylinder, and it is filled in accordance with the predetermined rate of pressure growth in the cavity 10.

Claims (2)

1. Electro-pneumatic valve unit of an air-breathing device, mainly a rail vehicle, comprising a housing divided by a partition with a central opening into two chambers, in the lower of which a spring-loaded tubular element is placed, passed through with a seal through the opening in the lower wall of the housing and with a clearance through the central the opening of the partition, while in the lower chamber on the tubular element there is a dish-shaped closure element of the inlet valve, and the end of the tubular element spring-loaded movable partition in the upper chamber outlet valve is formed, the cavity of the tubular member communicates with the atmosphere the lower chamber communicates with a passage connectable to the air, and a bypass passage connected to the space above the movable peregog rare separated from atmospheric the channel is normally closed by an electromagnetic valve, and the cavity formed between the movable and stationary barriers communicates with the channel connected to the brake cylinder, characterized in that, in order to increase braking efficiency by providing a three-phase operation of the valve assembly, it is equipped with a normally open solenoid valve, by means of which the bypass channel is connected to the cavity above the movable partition, and the throttles installed in the bypass and atmospheric channels. V. 2. Node pop. 1, characterized in that the windings of the solenoid valves are included in the parallel branches of the electric circuit by means of oppositely connected diodes.