Method and device for detecting internal leakage of multi-cavity valve

Abstract

The invention discloses a method for detecting internal leakage of a multi-cavity valve. The method comprises the following steps that the valve to be detected is placed on a sealing board, and the sealing board seals and covers openings of cavities of the valve; sealing rods are inserted into and seal valve element holes in the two sides of the valve to be detected so that oil channels between the cavities in the valve can be sealed, and the cavities can be sealed independently; the cavities are inflated and deflated; the state of the valve to be detected in actual operation is simulated, pressure maintaining is completed within the set time, a leakage value is detected through an airtight instrument, and then the leakage situation of the cavities can be obtained. The invention further discloses a device for detecting internal leakage of the multi-cavity valve correspondingly. The operation of manually assembling valve elements can be omitted, and leakage detection and series leakage detection are carried out on the oil channels of the multi-cavity valve automatically. Meanwhile, labor intensity of workers is relieved, and stability of detection quality is improved.

Description

technical field [0001] The invention relates to the technical field of parts air tightness detection, and more specifically relates to an internal leakage detection process method and device of a multi-cavity valve body for an automobile engine. technical background [0002] The rapid development of the automobile industry has put forward higher requirements for the design and manufacture of parts, and high integration, high performance, and low cost are notable features. In order to meet these requirements, it is applied to the control valve body of the automobile engine, integrating multiple solenoid valve holes and high-pressure oil passages on one control valve body part, reducing the assembly parts of the engine assembly, reducing the volume of the engine, and improving mechanical performance and use. Function. [0003] Since the control valve body integrates multiple oil circuits, once leakage occurs, it will affect the power and normal operation of the engine, so the...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a detection process and device for internal leakage of a multi-cavity valve body, which uses the sealing rod on the side to seal the corresponding oil passage, and then performs an airtight test on each cavity. Judging the detected leakage value, whether there is leakage between the cavities, so as to overcome the defects of unstable leak detection results and low efficiency in the existing detection

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