Self-expansion type outer wall screw hole plugging structure

By using a self-expanding external wall bolt hole sealing structure, silicone-based self-expanding sealant and closed-cell polyurethane foam are injected in stages, combined with a conical rubber head design, the problems of rainwater infiltration and noise transmission in traditional sealing methods are solved, achieving highly efficient waterproofing and noise reduction effects.

CN224282075UActive Publication Date: 2026-05-26GUANGDONG XIONGQIAO CONSTR GRP CO LTD
0 Cites 0 Cited by

Patent Information

Application Number
CN202521082841.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-28
Publication Date
2026-05-26
Estimated Expiration
2035-05-28

AI Technical Summary

Technical Problem

In traditional sealing methods, rainwater or moisture can seep into the screw hole along the crack after the mortar has hardened. The mortar has a high density but poor sound absorption performance, making it difficult to block external noise from being transmitted through the hole.

Method used

The structure employs a self-expanding external wall bolt hole sealing method. By setting up sealing components and self-expanding components, silicone-based self-expanding sealant and closed-cell polyurethane foam are injected in stages. Combined with the design of conical rubber heads, a dual physical and chemical seal is formed, which improves waterproofing and noise reduction.

Benefits of technology

It significantly improves waterproofing and noise reduction, blocks water penetration and sound wave transmission paths, adapts to slight deformation or thermal expansion and contraction of holes, and ensures long-term structural stability and leak-proof redundancy.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The utility model discloses a self-expansion type outer wall screw hole plugging structure, and relates to the technical field of building construction. The self-expansion screw comprises a screw hole, a plugging assembly is arranged in the screw hole, and a self-expansion assembly is arranged in the screw hole. According to the utility model, the silicone-based self-expanding sealant and the closed-cell polyurethane foam are injected in stages through the cooperative work of the hollow plugging rod and the reusable adjusting rod. After the adjusting rod is inserted into the plugging rod, the first injection hole is triggered to inject glue when the positioning plate makes contact with the outer wall, the silicone-based self-expanding sealant expands to fill micro cracks in the inner wall of the hole, and the noise reduction effect is achieved; and then the adjusting rod is pulled out, closed-cell polyurethane foam is injected through the second injection hole, the gap is further filled, and the waterproof effect is achieved. The staged glue injection process avoids cross contamination of the materials, the elasticity of the silicone-based self-expanding sealant and the sound absorption characteristic of the closed-cell foam are synergistic, the waterproofness and the noise reduction effect are remarkably improved, and water permeation and sound wave transmission paths are blocked.
Need to check novelty before this filing date? Find Prior Art