A composite axial cold-extruded steel bar connecting sleeve

The combination structure of inner sleeve, outer sleeve and locking ring solves the problem of unstable rebar connection, ensures that the locking ring does not deform and the rebar is subjected to uniform stress, thereby improving the stability and effectiveness of the rebar connection.

CN224281759UActive Publication Date: 2026-05-26ZHEJIANG NUCLEAR POWER SPECIAL BUILDING MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHEJIANG NUCLEAR POWER SPECIAL BUILDING MATERIALS CO LTD
Filing Date
2025-04-14
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing rebar connection methods suffer from cumbersome procedures, difficulty in quality control, and unstable installation. In particular, composite axial cold-extruded rebar connection sleeves are prone to deformation and uneven stress during use.

Method used

It adopts a combination structure of inner sleeve, outer sleeve and locking ring. Locking rings are fitted on the outer sides of both ends of the inner sleeve, and locking rings are locked between the outer sleeve and the inner sleeve. Limiting pins are inserted at the center of the inner sleeve and the outer sleeve. The material is No. 20 steel to ensure that the locking rings do not deform and that the insertion length of the reinforcing bars is consistent.

Benefits of technology

It improves the stability and uniformity of the rebar connection, prevents the locking ring from falling off, ensures a more stable installation, and enhances the rebar connection effect.

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    Figure CN224281759U_ABST
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Abstract

This utility model discloses a composite axial cold-extruded rebar connecting sleeve, including an inner sleeve and an outer sleeve. The outer sleeve is fitted outside the inner sleeve, and two rebars are respectively inserted into both ends of the inner sleeve. Locking rings are fitted on the outer sides of both ends of the inner sleeve. This relates to the field of rebar connection technology. By setting an outer sleeve outside the inner sleeve, the locking rings are locked between the outer sleeve and the inner sleeve, preventing the locking rings from deforming under force and avoiding them from falling off, making the installation more stable. At the same time, a limiting pin is inserted at the center of the inner sleeve and the outer sleeve, so that the two rebars are inserted into the inner sleeve at the same length, and the force on both ends of the inner sleeve is more uniform, improving the rebar connection effect.
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