Automatic opening and closing device for shotcrete port

CN224325784UActive Publication Date: 2026-06-05CCCC FIRST AVIATION BUREAU SOUTH CHINA ENG CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: CCCC FIRST AVIATION BUREAU SOUTH CHINA ENG CO LTD
Filing Date: 2025-05-21
Publication Date: 2026-06-05

AI Technical Summary

Technical Problem

The existing grouting nozzle design is prone to clogging when the drill rod reverses, resulting in insufficient control over the uniformity and direction of grouting. Furthermore, it is prone to cement grout leakage during non-grouting stages, affecting construction efficiency and the environment.

Method used

An automatic grout nozzle opening and closing device is adopted, which combines grout pressure and mechanical linkage mechanism. Through the staggered distribution of fixed plate and moving plate and magnetic attraction, the grout nozzle is automatically opened and closed, and the grout nozzle is blocked when not grouting to prevent external grout from flowing back in.

Benefits of technology

It enables automatic opening and closing of the spray nozzle, preventing blockage and leakage, ensuring uniformity and directional control of spraying, improving construction efficiency, and reducing environmental pollution and resource waste.

✦ Generated by Eureka AI based on patent content.

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Figure CN224325784U_ABST

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Abstract

The utility model relates to a kind of automatic opening and closing device of spouting mouth, belong to deep cement mixing pile construction technical field;Wherein automatic opening and closing device of spouting mouth includes fixed plate, moving plate, connecting piece and spring;Fixed plate is connected to drill rod, and fixed plate is equipped with the first through hole for slurry water to pass through;Moving plate is located at the side of fixed plate away from the inside of drill rod, and moving plate is equipped with the second through hole for slurry water to pass through, and the second through hole is distributed along the circumference of spouting mouth with the first through hole staggered;One end of connecting piece is connected to moving plate, and the other end of connecting piece is set in the inside of drill rod through fixed plate;Spring is sleeved on the outer periphery of connecting piece, one end of spring is in abutment with the side of fixed plate away from moving plate, and the other end of spring is in abutment with the end portion of connecting piece in the inside of drill rod.The automatic opening and closing device of spouting mouth provided by the utility model is combined with slurry pressure and mechanical linkage mechanism, not only can realize the automatic opening and closing of spouting mouth, but also can prevent external slurry water from flowing into the inside of drill rod in reverse.

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