Upper shell of quick release valve for braking, as well as quick release valve

Abstract

The invention relates to an upper shell of quick release valve for braking, as well as the quick release valve. The upper shell comprises an upper shell body, wherein a gas inlet cavity is formed above the upper shell body and is communicated with an inner cavity of the upper shell; the gas inlet cavity comprises a cylindrical cavity and a conical cavity positioned below the cylindrical cavity; one end, with smaller diameter, of the conical cavity is connected with the lower end of the cylindrical cavity; one end, with bigger diameter, of the conical cavity is communicated with the inner cavity of the upper shell body. According to the technical scheme, the conical cavity is formed in the gas inlet cavity of the upper shell, so the condition that a membrane generates high-frequency vibration when being subjected to high-pressure gas impact can be inhibited, gas inlet squeal can be reduced and gas inlet speed can be increased.

Description

technical field [0001] The invention belongs to the technical field of pneumatic braking, in particular to an upper casing of a quick-release valve for braking and a quick-release valve. Background technique [0002] The quick release valve is used in truck pneumatic brake models, and it is generally arranged in the brake pipeline close to the brake chamber, which plays the role of quick exhaust when the brake is released, so as to quickly release the brake. [0003] The structure of the quick release valve in the prior art is as follows: Figure 1 to Figure 4 As shown, when assembling, stick the deflation valve 5 on the lower casing 2, place the sealing ring 3 in the pre-opened sealing groove of the upper casing 1, place the diaphragm 4 on the deflation valve 5 and use it four times. The bolt and the spring washer 6 pass through the bolt 7 and tightened. The above-mentioned assembly requires the centers of the two parts to be aligned. [0004] When the car brakes, the comp...

AI Technical Summary

Problems solved by technology

Such technology is useful for reducing the exhaust noise of the quick-release valve, but it can only reduce the airflow noise generated when the exhaust port is exhausted when the brake is released, and cannot reduce the high-frequency vibration of the diaphragm 4 during braking. Howling

Moreover, after the shock absorbing equipment is installed, there are still problems such as taking up a lot of space and high cost.

[0009] The force-bearing area of ​​the diaphragm at the air inlet is small, and the inflation speed is slow during braking. When the quick-release valve brakes, the high-pressure gas will cause Diaphragm vibrates at a high frequency, resulting in intake whistle of the quick release valve

Images