Respirator air outlet pipe heat preservation pipe for diesel engine

By installing a composite heating structure consisting of an insulation tube, heating wire, and heating rod on the outside of the diesel engine's exhaust pipe, combined with an inner wall heating block and bidirectional screw adjustment, the problem of easy blockage of the breather's exhaust pipe in low-temperature environments is solved, thus improving the engine's operational stability and adaptability.

CN224244949UActive Publication Date: 2026-05-15WEIFANG HUAKUN DIESEL ENGINE CO LTD
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Patent Information

Application Number
CN202521318475.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-06-26
Publication Date
2026-05-15
Estimated Expiration
2035-06-26

AI Technical Summary

Technical Problem

Existing diesel engine breather exhaust pipes have insufficient insulation under extreme low temperatures or frequent start-stop conditions, which easily leads to water vapor accumulation and condensation into ice, causing pipe blockage and subsequently resulting in increased internal engine pressure, oil leakage, and reduced power.

Method used

It adopts a composite heating structure with an insulation tube, heating wire, and heating rod wrapped around the outside of the air outlet pipe, and a heating block on the inner wall. Combined with a two-way screw adjustment mechanism, it can achieve multi-point heating and tight fit of the air outlet pipe, enhance heat conduction efficiency, and ensure stability and adaptability through a limiting structure.

Benefits of technology

It effectively prevents water vapor from condensing into ice and causing blockage, improves the antifreeze capability of the exhaust pipe under complex working conditions, enhances the reliability and applicability of the engine ventilation system, and is suitable for installation of exhaust pipes of different diameters.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model relates to the technical field of diesel engines, in particular to a heat preservation pipe of a breather air outlet pipe for a diesel engine, which comprises a heat preservation pipe, one side of the top of the heat preservation pipe is open, a plurality of heating blocks are fixedly connected on the inner wall of the air outlet pipe, and a heating wire is fixedly connected between the heat preservation pipe and the air outlet pipe. And a plurality of heating rods are fixedly connected to the heating wire. Through a composite heating structure composed of the heat preservation pipe arranged on the outer side of the air outlet pipe in a sleeving mode, the heating wire and the heating rod, effective control over the external environment temperature of the air outlet pipe is achieved, and the problem that in the prior art, a cooling liquid circulation type heat preservation pipe cannot be heated in time in the cold start or low-temperature environment, and consequently freezing is caused is solved; the anti-freezing capability of the air outlet pipe under complex working conditions is obviously improved; and secondly, the heating block arranged on the inner wall of the gas outlet pipe can directly heat exhausted gas, and the water vapor condensation phenomenon caused by gas temperature reduction is effectively prevented.
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