Automatic automobile braking line air tightness detecting device and detecting method thereof

Abstract

The invention discloses an automatic automobile braking line air tightness detecting device and a detecting method thereof. The automatic automobile braking line air tightness detecting device comprises an air inlet pipe, a testing pipe and an exhausting pipe, wherein the air inlet pipe comprises a compressed air source, a first magnetic valve and a first pressure sensor, the testing pipe comprises a second magnetic valve and a second pressure sensor, and the exhausting pipe comprises a third magnetic valve. The air tightness is detected by adopting a differential pressure method and combiningwith a soap lather detection method and an automatic carbon dioxide air tightness detecting method. Automatic automobile braking line air tightness detection is achieved, meanwhile the testing pipe number can be set according to the production demand, the detecting efficiency and precision are improved, and the demand for automatic detection during large-scale production is met. Compared with a direct voltage method adopted for manual detection, the differential pressure method can effectively decrease system errors and errors caused by environmental change. In addition, compared with a traditional differential pressure method, a comparison workpiece is not needed, a device structure is simplified, and the limitation that a leakage point is sought by adopting a traditional soap lather detection method is made up.

Description

technical field [0001] The invention belongs to the field of air tightness detection, and in particular relates to an automatic air tightness detection device and a detection method of an automobile brake pipeline. Background technique [0002] At present, almost all passenger cars over 4 tons use pneumatic brakes, and the air tightness of the brake pipelines directly affects the braking performance of the vehicle, which is closely related to people's lives and property. [0003] The traditional detection method of vehicle air tightness is to use a mechanical barometer to measure the pressure drop of the vehicle (chassis) brake system for a period of time under a certain pressure. Due to the complex pipeline of the whole vehicle (chassis), in order to ensure the detection accuracy, a long detection time is required. Due to the long manual inspection cycle, large errors, and low efficiency, it is easy to cause the quality of the final factory product to be difficult to contr...

AI Technical Summary

Problems solved by technology

Due to the complex pipeline of the whole vehicle (chassis), in order to ensure the detection accuracy, a long detection time is required

Due to the long manual inspection cycle, large errors, and low efficiency, it is easy to cause the quality of the final factory product to be difficult to control

[0004] At the same time, when a leak point is detected in the pipeline under test, the traditional soap foam detection method cannot effectively find the tiny leak point

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