Chemical anchor bolt, connecting structure for fixing building attachment by using chemical anchor bolt and mounting method

Abstract

The invention provides a chemical anchor bolt, a connecting structure for fixing a building attachment by using the chemical anchor bolt and a mounting method. A metal anchor rod of the chemical anchor bolt is provided with an anti-loosening anchor section and a fastening sleeve, wherein the fastening sleeve tightly presses a connected part under the action of a tool, and an inner hole is shrunk to tightly wrap the anti-loosening anchor section and simultaneously form a concavo-convex inner hole surface matched with anti-loosening stripes on the surface of the anti-loosening anchor section to form weldless permanent connection; a convex ring or a bump is arranged at the front end of the fastening sleeve, and is squeezed into a gap between the hole wall of a hole, through which the metal anchor rod penetrates, of the building attachment and the metal anchor rod to form squeezing or interference fit. The chemical anchor bolt can be used for realizing permanent firm connection without welding, loosening is avoided, the fastening strength is greatly strengthened, all uncertain factors influencing chemical gum are eliminated, the aim of safety is actually fulfilled, and the mounting labor and the mounting cost can be reduced; a fireproof and heat-resistant solution to the chemical anchor bolt is also disclosed, so that the chemical anchor bolt is applied to various fire zones.

Description

technical field [0001] The invention relates to a chemical riveting bolt and a connection structure and installation method for fixing building accessories by using the chemical riveting bolt. Background technique [0002] At present, the chemical anchor bolts used in the curtain wall of the building enclosure structure use bolts as fasteners and screws as metal riveting rods. Due to the influence of external forces such as wind waves and thermal expansion and contraction hundreds of thousands of times a year, the bolts will loosen. , resulting in an accident. Therefore, in order to prevent the bolt from loosening, the national standard requires that the screw and the nut be welded to death. However, although welding solves the problem caused by loose nuts, it also affects the performance of the chemical glue and affects the service life. The reason is that the screw is a high-quality heat conductor, and the high heat generated during welding will flow along the screw. Int...

AI Technical Summary

Problems solved by technology

[0003] At present, there are also claimed heat-resistant chemical anchor bolts. Although they are more heat-resistant than ordinary chemical glue, their price is higher.

Moreover, it is difficult to estimate how much heat is transmitted into the connection hole of the substrate during welding, how large the thermal shock is during welding, etc. The same risk exists in the application of heat-resistant chemical anchor bolts, and there is no fundamental problem solving

[0004] Moreover, the current chemical anchors do not take into account the problem of fire prevention

For nuts and screws, after welding, it is also difficult to adopt practical and economical fire protection measures

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