Novel trailer control valve

Abstract

The invention provides a novel trailer control valve which comprises a valve body and a valve deck mounted on the lower side of the valve body, wherein an air inlet port and an air outlet port are formed in the two opposite sides of the upper part of the valve body; an air inlet / outlet is formed in one side of the lower part of the valve body; an opening connected with an air outlet mechanism is formed in the middle upper part of the other side of the valve body opposite to the side of the lower part of the valve body; the air outlet mechanism is three groups of bi-pass check valves assembled in sequence; the openings in the two opposite sides of each bi-pass check valve are air inlets, an air outlet is formed in the side wall of each bi-pass check valve, and a seal ball capable of blocking the air inlets is further movably arranged inside each bi-pass check valve; a passage capable of being communicated with the air inlet port, the air outlet port and the air outlet mechanism is arranged inside the valve body; and an adjusting mechanism capable of adjusting the trend of the airflow inside the valve body is movably arranged inside the passage. Compared with the prior art, the novel trailer control valve has large ventilation flow, no retardation and few faults, the manufacturing cost is low, the reliability and the durability are greatly improved, and the popularization is facilitated.

Description

technical field [0001] The invention relates to the technical field of automobile braking, in particular to a novel trailer control valve with simple structure and convenient use. Background technique [0002] As my country's expressway backbone network has been basically formed, large-tonnage, trucks, long-wheelbase semi-trailers, and trailers with obvious cost advantages per ton-kilometer are also increasing year by year. Due to the increase of the wheelbase of the above-mentioned vehicles, the brake pipeline is also correspondingly lengthened. For the long-wheelbase vehicles running at high speed, the reaction time lag of the air brake system and insufficient braking force are still the main problems. However, the existing double-pipeline trailer brake valve has a lag in the trailer braking time under heavy load, and the brake is soft. It cannot meet the braking force required by the long-wheelbase vehicle during point braking or semi-braking. The phenomenon of hitting t...

AI Technical Summary

Problems solved by technology

Due to the increase of the wheelbase of the above-mentioned vehicles, the brake pipeline is also correspondingly lengthened. For the long-wheelbase vehicles running at high speed, the reaction time lag of the air brake system and insufficient braking force are still the main problems.

However, the existing double-pipeline trailer brake valve has a lag in the trailer braking time under heavy load, and the brake is soft. It cannot meet the braking force required by the long-wheelbase vehicle during point braking or semi-braking. The phenomenon of hitting the main vehicle, increasing the no-load of the emergency relay valve of the trailer, serious tire dragging phenomenon, serious tire wear, and poor braking effect, especially when the weather is bad and the road conditions are not good, traffic accidents are prone to occur

[0003] At present, the widely used new trailer control valves generally have complex manufacturing process, many faults, low sensitivity, easy to freeze in cold seasons, easy to block, easy to rust and block the piston, and the brake lags behind during operation, or does not return, or There are deficiencies such as air leakage and difficulty in releasing the hand brake. The above-mentioned disadvantages plague the drivers. Even if the more advanced imported WABCO products are considered to be insufficient in terms of sensitivity, ventilation flow, reliability and durability. satisfactory

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