Rotary high-precision air tightness detection apparatus

Abstract

The invention provides a rotary type high-precision air-tightness detection device, and relates to a differential pressure measurement system consisting of a reading tube (1), a loop tube (2), a communicating tube (3), a comparison cavity (4), a sensor interface (5), a sensor sealing member (6) and a pressure sensor (7). The detection device is characterized in that the reading tube (1), the communicating tube (3) and the comparison cavity (4) form a U-shaped tube; the loop tube (2) is used for being communicated with the lowest position of the U-shaped tube and the highest position of the comparison cavity (4), and is positioned between the reading tube (1) and the comparison cavity (4), and the sensor interface (5) is positioned at the highest position of the loop tube (2), thus incorporating the comparison cavity (4) in the differential pressure measurement system into a measurement device to reduce the volume of the measurement system; and the U-shaped tube has double functions ofdifferential pressure measurement and tube communication by rotation so as to remove such moving elements as a valve and the like, which causes the detection device to have high reliability, long service life and low manufacturing cost.

Description

Rotary high-precision air tightness detection device Technical field: The invention relates to a rotary high-precision airtightness detection device, which belongs to the field of hydraulic pneumatics and sealing technology, and in particular to a device for detecting the airtightness of a system or parts by using a U-shaped tube differential pressure method. technical background: Leakage is one of the problems often encountered in engineering. Any system or component involving liquid (or gas), such as vacuum system, pneumatic system, hydraulic system, etc., may have leakage. Certain airtightness requirements are put forward for these systems or components in the project, and strict airtightness inspections are carried out. Air tightness detection methods mainly include water immersion detection method, flow measurement method, pressure measurement method, inert gas detection method, etc. The water immersion detection method is to immerse the tested system or parts in w...

AI Technical Summary

Problems solved by technology

As far as the pressure measurement method is concerned, only the direct measurement method with simple equipment, low cost, and low detection accuracy and the differential pressure measurement method with complex equipment, high cost, and high detection accuracy are commonly used, which cannot well meet production needs

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