Leakage detection device of base surface of fuel oil common-rail control valve body

Abstract

The invention discloses a leakage detection device of a base surface of a fuel oil common-rail control valve body. The device comprises a differential pressure type airtight leakage detector, a volume expansion device and a plugging and positioning device, wherein a detection tube is connected to the detection end of the airtight detector, one end of the detection tube stretches into a pressing block groove of the plugging and positioning device to enable the airtight leakage detector and the pressing block groove to be communicated, and the volume expansion device is communicated to the detection tube of the airtight leakage detector through a T-joint. The leakage detection device of the base surface of the fuel oil common-rail control valve body has the advantages of being convenient to use, accurate and reliable in leakage detection, good in stability, good in environmental friendliness, and capable of avoiding false detection occurring in a traditional oil detection process caused by fatigue of eyes of people or observation inconvenience. Furthermore, due to the fact that air pressure resources used by the differential pressure type airtight leakage detector is inexhaustible, resource waste caused by oil detection can be effectively reduced, and environment pollution can not be caused easily.

Description

technical field [0001] The invention relates to the field of leakage detection devices, in particular to a leakage detection device for a seat surface of a fuel common rail control valve body. Background technique [0002] With the continuous development of the airtight leak detector industry, the use of airtight leak detectors in daily leak detection has gradually expanded, but the internal volume of the fuel oil common rail control valve body is small, within 5mL, and the leakage standard of qualified parts is relatively high. Generally, it is controlled within 25mL / min. Under normal circumstances, it is difficult to quickly block the seat surface of the valve body and use the differential pressure airtight leak detector to detect the leakage of the seat surface of the fuel control valve body. Contents of the invention [0003] The object of the present invention is to provide a leakage detection device for the seat surface of a fuel common rail control valve body, so as...

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Problems solved by technology

[0002] With the continuous development of the airtight leak detector industry, the use of airtight leak detectors in daily leak detection has gradually expanded, but the internal volume of the fuel oil common rail control valve body is small, within 5mL, and the leakage standard of qualified parts is relatively high. Generally, it is controlled within 25mL / min. Under normal circumstances, it is difficult to quickly block the seat surface of the valve body and use the differential pressure airtight leak detector to detect the leakage of the seat surface of the fuel control valve body.

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