SU1523436A1 - Relay device with pneumatic control - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to transport engineering, in particular, to the pneumatic braking systems of road trains. The purpose of the invention is to simplify the design. A bypass valve 7, preloaded with spring 8, and a partition with channel 5 are installed in cavity 6, made in the body of a stepped follower piston 10, which forms with the housing a correction cavity 11, communicated by channel 9 with cavity 6. 1 Il.

Description

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The invention relates to transport engineering, in particular to pneumatic brake systems of road trains.

The purpose of the invention is to simplify the design.

The drawing shows the design of a relay pneumatic control device with a pressure advancing device integrated into the cavity of the control piston of the trailer thromos air distributor, vertical section.

The over-piston control cavity I of the apparatus through channel 2 and cavity 3 communicates with the boss 4 of the control line (not shown), as well as through channel 5 with the cavity 6 of the relief valve 7 preloaded with spring 8, and the cavity 6 through channel 9 in the stepped the piston 10 communicates with the correction cavity 11, the sub piston output cavity 12 communicates with the brake chambers (not shown).

A supply line (not shown) is connected to the bob 13. The pneumatic relay device has a cavity 14, a non-return valve 15, a cavity 16 and a channel 17 connecting the inlet 16 to the receiver Bob 18, and the channel 19 connecting the boss 18c subvalvular cavity 20,

The inlet-outlet valve 21 is installed, - flax in the lower part of the housing 22, In the stepped piston 10 an unloaded relief valve 23 is placed.

In the initial position, the compressed air from the lug 13 through the cavity 14, non-return valve 15, cavity 16 and channel 17 goes to the receiver bob 18, as well as through channel 19 to the sub-valve cavity 20,

When braking squeeze the air from the boss 4 through the cavity 3 and channel 2

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enters the cavity 1 and then through the channel 5 and the relief valve 7 into the cavity 6 and through the channel 9 into the cavity

11 Why compressed air pressure,

entered through the bypass valve 7 into the cavity 6, less than the pressure in the cavity 1 by an amount proportional to the force of the spring 8, while the compressed air in the cavity 1 moves the control cylinder 10, which, acting on the valve 21, tracks a pressure in the cavity 12 pressure in cavity 1 by an amount proportional to the pressure difference in cavity 1 and 11, the bypass valve 23 is designed to be released. air from cavities 6 and 11 when opening.

Claims (1)

Invention Formula s The relay pneumatic device, mainly for the braking system of the vehicle, comprising a housing housing an intake-exhaust valve controlled by a stepped piston and an unloaded relief valve installed in a separate cavity, with the stepped piston separating the control, output and corrective cavity the latter of which is communicated by a channel with a cavity of an unloaded bypass valve, which closes the compressed air supply channel, which, in order to simplify the design and unbalanced relief valve cavity formed in the body of the stepped piston and the compressed air supply hole is formed in the end wall of the stepped piston dividing the cavity and a control cavity unloaded bypass valve.