A gas circulation pressurizing device for a roller hearth annealing furnace

By designing a gas circulation booster device with a straight-through flow channel and a conical cavity in the roller hearth annealing furnace in conjunction with ceramic balls, the problem of nitrogen purging without pressure maintenance in copper tube annealing was solved, achieving stable gas sealing and resistance to high-temperature environments.

CN224530958UActive Publication Date: 2026-07-21FOSHAN SHUNDE JINGYI WANXI COPPER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
FOSHAN SHUNDE JINGYI WANXI COPPER CO LTD
Filing Date
2025-08-27
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

The existing copper tube annealing nitrogen filling is a direct connection type and does not have a pressure holding function. The L-type one-way valve cannot completely cover the annealing rack, and the upright gas nozzle interface of the rack cannot effectively fill nitrogen and maintain pressure.

Method used

A gas circulation booster device for a roller hearth annealing furnace is designed. It uses a straight-through flow channel and a conical cavity to cooperate with ceramic balls to form a sealing surface. The inlet pressure pushes the ceramic balls to open, and the gas flows into the material rack. When the gas stops, the ceramic balls fall back to seal by gravity, blocking reverse leakage. The connectors and valve bodies are made of stainless steel and are suitable for vertical air nozzle installation on upright material racks.

Benefits of technology

It achieves effective pressure holding during the copper tube annealing process, avoids metal balls from getting stuck or failing to seal due to thermal expansion, and improves the stability and tolerance of nitrogen purging.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to roller hearth annealing furnace technical field especially a kind of roller hearth annealing furnace gas circulation pressurizing device, present and propose the following scheme, including valve body, the middle part of valve body is vertically provided with straight-through air passage, the middle section of straight-through air passage is provided with narrow air passage with smaller diameter, the front end of narrow air passage is set to conical cavity, the middle part of conical cavity is equipped with ceramic ball, the top of valve body is provided with threaded groove, the inside of threaded groove is threadedly connected with lower interface;By setting conical cavity, with ceramic ball cooperation form sealing surface, realize pressure maintaining function, when inlet pressure promotes ceramic ball to leave conical cavity, gas flows into rack, on the contrary, ceramic ball relies on gravity and falls to the bottom end of conical cavity, block gas reverse leakage, wherein ceramic ball uses high-temperature environment of copper pipe annealing process resistance, overall design fills the gap of one-way valve for copper pipe annealing, and L-shaped one-way valve is applicable to different tooling and scene.
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