Stepless pressure regulation drainage antifreeze emergency relay valve

Abstract

The invention discloses an emergency relay valve with stepless pressure regulation, drainage and antifreeze. The emergency relay valve with the stepless pressure regulation, drainage and antifreeze comprises an upper valve body and a lower valve body. The upper valve body is provided with an air inlet, an air outlet, an air reservoir interface and a one-way flow-limiting valve, and a hollow emergency piston is movably installed in the upper valve body. An upper grid plate is erected on the outer side of an opening at the bottom of the emergency piston, and an upper piston, a lower grid plate and a lower piston are sequentially installed at the bottom end of the opening at the bottom of the emergency piston. The middle portion of the outer side of the upper piston is horizontally raised toform a first cavity with the upper grid plate and the emergency piston, a plurality of air passing through-holes are formed in the upper grid plate, and the air outlet and the one-way flow-limiting valve communicate with the first cavity through the air passing through-holes. A first axle air outlet is formed in the flow-limiting outlet end of the one-way flow-limiting valve. An exhaust opening and a control opening are formed in the lower valve body, the exhaust opening communicates with the first cavity through the upper piston, and a one-way pressure regulation valve is arranged on the control opening. The emergency relay valve with the stepless pressure regulation, drainage and antifreeze realizes the functions of drainage and antifreeze, anti-lock braking of a first axle and steplesspressure regulation, and effectively ensures driving safety.

Description

technical field [0001] The invention relates to a vehicle braking device, in particular to a relay valve for emergency braking of trailers and semi-trailers. [0002] technical background [0003] The brake device of the vehicle is an important part of ensuring driving safety. The existing trailers and semi-trailers still have serious safety problems in the braking aspect, such as; The tires of the first axle are braked and dragged, and the return position is slow after braking. In winter, the pump valve is easy to freeze, resulting in braking skids, braking ineffective, etc.; Emergency relay valve with pressure regulation and primary anti-lock function. Contents of the invention [0004] Based on the deficiencies of the prior art, the present invention provides a stepless pressure regulating drainage antifreeze emergency relay valve, the internal piston and valve are all inverted structures to ensure unobstructed drainage; The valve adjusts and controls the air pressure ...

AI Technical Summary

Problems solved by technology

[0003] The brake device of the vehicle is an important part of ensuring driving safety. The existing trailers and semi-trailers still have serious safety problems in the braking aspect, such as; The tires of the first axle are braked and dragged, and the return position is slow after braking. In winter, the pump valve is easy to freeze, resulting in braking skids, braking ineffective, etc.; Emergency relay valve with pressure regulation and primary anti-lock function

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