Airtightness detection device

By designing an airtightness testing device that uses a sliding mechanism between the mounting cylinder and connecting pipe to drive the elastic seal, the problems of high cost and low testing accuracy in existing technologies have been solved. This device enables rapid and reliable airtightness testing of waterways, adapts to interface deviations, reduces maintenance costs, and improves ease of operation.

CN224416374UActive Publication Date: 2026-06-26UNITED AUTOMOTIVE ELECTRONICS SYST
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Patent Information

Application Number
CN202521054711.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-27
Publication Date
2026-06-26
Estimated Expiration
2035-05-27

AI Technical Summary

Technical Problem

Existing electric drive system waterway airtightness testing devices rely on complete replacement or complex external equipment, resulting in high maintenance costs. They are also difficult to adapt to dimensional deviations in waterway interfaces, affecting testing accuracy, and are not suitable for rapid on-site testing.

Method used

An airtightness testing device was designed, comprising an installation cylinder, a connecting pipe, and an elastic seal. The axial sliding of the connecting pipe causes the elastic seal to be squeezed at the end face of the installation cylinder, achieving radial expansion sealing. Combined with a limit adjustment component and a gasket structure, a fast and reliable sealing effect is achieved.

Benefits of technology

It enables rapid sealing without complicated operations, significantly shortens testing time, adapts to dimensional tolerances and surface roughness deviations of waterway interfaces, reduces maintenance costs, improves testing reliability and convenience, and extends the service life of seals.

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Abstract

The utility model provides an air tightness detection device, and relates to the technical field of water channel air tightness detection. The device comprises a mounting cylinder, a connecting pipe and an elastic sealing piece, the mounting cylinder is provided with an internal channel used for inputting detection gas into a detected area, the connecting pipe is in sliding connection with the mounting cylinder, the elastic sealing piece is arranged on the connecting pipe in a sleeving mode, and when the connecting pipe slides to a first preset position in the axial direction, the elastic sealing piece is sealed. The connecting pipe drives the elastic sealing piece to extrude at the end face of the mounting cylinder, and the elastic sealing piece can expand in the radial direction so as to seal a detected area. The device can quickly achieve the sealing effect without complex operation, the detection time is remarkably shortened, the on-site quick detection requirement is met, the sealing structure can effectively compensate dimensional tolerance and surface roughness deviation of a water channel connector, the leakage problem caused by fit clearance of a traditional rigid sealing piece is avoided, and the sealing quality is improved. And the sealing performance is reliable, the structure is simpler, the operation is more convenient, and the structure cost is lower.
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