Leakage detection method using compressed air as medium

Abstract

The invention relates to a leakage detection method, in particular to a leakage detection method using compressed air as a medium. Automatic multi-station detection equipment is used in the method. All detection items are placed on a circular working disc, and five detection stations are uniformly distributed on the circumference of the disc. A rotary divider is driven by a motor so that the disc rotates, the detection stations are switched, detection is performed when the rotating disc stops, all operations generate various feedback signals, the signals are uniformly controlled and coordinated by a programmable logic controller (PLC), and meanwhile sequential detection and streamline operation are performed. The tested torque, pressure, flow and leakage are acquired by communication of a computer, the PLC, each instrument and each sensor and correspondingly processed; and all detection data are recorded in the computer and can be retrieved according to the date and item. The leakage detection method using the compressed air as the medium has high efficiency, good automation degree and low cost, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to a leakage detection method, in particular to a leakage detection method using compressed air as a medium. Background technique [0002] Leakage detection is a problem that all manufacturers of automobiles, motorcycles, air conditioners, gas appliances and other products must solve. Leakage detection has become an important subject in scientific research and production practice, and is essential to ensure product quality in large-scale production. key equipment. [0003] In fact, in order to ensure the quality, almost all automobile manufacturers in the world use a large number of components in the manufacturing process of the mechanism and parts that involve airtight requirements such as engines, clutches, steering systems, brake systems, radiators, fuel tanks, and even fuel tank caps. Adopt leakage airtight detection technology. After entering the 1990s, with the rise of the automobile manufacturing industry in our country, ...

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Problems solved by technology

[0004] At present, the leak detection method mainly used in the automotive industry is the differential pressure detection method with liquid as the medium. This method can complete the leakage detection of components such as engines, clutches, steering systems, brake systems, radiators, fuel tanks and even fuel tank caps. However, the main medium of auto parts is water, engine oil, gasoline, and their viscosity coefficient is almost the same as that of the liquid used as the detection medium, which makes the detection time relatively long, resulting in low efficiency of the method, low degree of automation, and high cost. Not suitable for mass production

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