A tightness test tool and test method

By designing a non-destructive installation tightness test fixture on a dummy rudder structure, using a drain plug hole as an interface, and combining threaded connection, sleeve drainage, guide rod sealing, and irregularly shaped sealing strip, the problems of low efficiency and damage to the base material in existing tightness test methods are solved, and a high-efficiency and reliable sealing test is achieved.

CN122217546APending Publication Date: 2026-06-16CHENGXI SHIPYARD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHENGXI SHIPYARD
Filing Date
2026-04-23
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

Existing tightness testing methods are cumbersome and inefficient. Welding and cutting the screws cause thermal damage to the base material, resulting in limited positioning accuracy, unreliable sealing, and frequent air leakage, which affects the construction cycle and construction quality.

Method used

Using the drain plug hole of the dummy rudder structure as the installation interface, a tightness test fixture was designed, including a connector and an air injection pipe. Non-destructive installation is achieved through threaded connection and sealing seat. A sleeve is set to drain accumulated water. The guide rod and the closing plate form a pressure self-tightening seal. The irregularly shaped sealing strip adapts to irregular shapes. The separator membrane controls the air pressure, simplifying the operation process.

Benefits of technology

The leak test fixture enables non-destructive installation and reusability, improving test efficiency and sealing reliability, avoiding damage to the base material and air leakage, shortening auxiliary operation time, and ensuring the accuracy and reliability of the sealing effect.

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    Figure CN122217546A_ABST
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Abstract

The application discloses a kind of tightness test tool and test method, the tool uses the original water drain plug hole on false rudder structure as installation interface, including connector and gas injection pipe, connector is threadedly matched with water drain plug hole, and pressure gauge interface and gas inlet are provided on gas injection pipe.The connector is provided with threaded connection section and sealing seat, and the sealing ring is embedded in the surface of sealing seat and is interference fit with water drain plug hole;Gas injection pipe is provided with a sleeve on the periphery, and there is a radial height difference between them and a drain valve is provided, to realize first drainage and then gas injection;The end of the connector is provided with a separation membrane with a breaking pressure less than the test pressure, to realize automatic sequential control of drainage and gas injection;Water drain plug hole is provided with a guide rod and a slidingly connected closure plate, and the connector pulls the closure plate towards the water drain plug hole from the outside to form an inside tight seal.The application does not need welding, no base material damage, reliable sealing, and can be reused.
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