Water passage coupling structure for engine

By combining a steel pipe liner and a sealing sleeve, the problems of sealing failure, insufficient structural strength, and difficulty in disassembly and maintenance of engine water pipe connections are solved. This achieves sealing performance and reliability under high temperature and high pressure conditions, reduces maintenance costs, and is suitable for mass production.

CN224364502UActive Publication Date: 2026-06-16Y & C ENGINE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Y & C ENGINE
Filing Date
2025-06-13
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Existing engine water pipe connections have problems such as risk of seal failure, insufficient structural strength, and difficulty in disassembly and maintenance. In particular, under high temperature and high pressure environments, they are prone to deformation of the seal ring, aging and leakage, fatigue of the connectors, and rusting and jamming of the nuts.

⚗Method used

The system adopts a combination structure of steel pipe lining and sealing sleeve. The radial seal is formed by the interference fit between the annular protrusion and the seat hole. The limiting block restricts axial displacement. The thermal expansion of the steel pipe lining enhances the connection rigidity. The sealing sleeve is made of high-elasticity vulcanized rubber. The extension is exposed on the interface end face for easy inspection of aging, achieving double sealing and convenient disassembly and assembly.

🎯Benefits of technology

It improves the sealing and structural strength of the engine water circuit connection, reduces maintenance costs, ensures reliability and durability under high temperature and high pressure environments, is suitable for mass production, and reduces material costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to water route structure technical field, and disclose a water route connecting structure for engine is suitable for the pipeline connection between EGR cooler and temperature regulator seat of high horse power natural gas engine, and provides cooling liquid flow passage, specifically includes first water pipe joint, second water pipe joint, connecting pipe, and the opening end of first water pipe joint and second water pipe joint all has the seat hole of centering arrangement, and the both ends of connecting pipe are connected with first water pipe joint and second water pipe joint respectively through seat hole. The utility model discloses through the interference fit of annular protrusion of sealing sleeve both ends and seat hole inner wall, and then through the hard contact occlusion of seat hole inner wall after the thermal expansion of steel pipe lining temperature, improves the stability of connection, and also can make up the elastic attenuation caused by sealing sleeve aging, thereby realizes double seal, prevents cooling liquid leakage, effectively improves the sealing property of engine water route connection, and convenient to dismount, is convenient for the overhauling and maintenance of later period.
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