Corrosion-resistant high-strength hexagonal bolt

Abstract

The invention discloses a corrosion-resistant high-strength hexagonal bolt which comprises a bolt body and a gasket; the bolt body further comprises a screw head, a stud and reinforcement ribs; the stud consists of a contraction section, close to the bottom of the screw head, and a threaded section, away from the bottom of the screw head; a plurality of side edge grooves are formed in the outer side wall of the threaded section; the reinforcing ribs are arranged in the side edge grooves respectively; the gasket further comprises an inner side elastic gasket and an outer side anti-loose gasket;the inner side elastic gasket is nested on the contraction section; and the outer side anti-loose gasket is connected with the stud through the inner side elastic gasket. Compared with the prior art,the corrosion-resistant high-strength hexagonal bolt is of a simple structure, is reasonable in design and is capable of effectively improving the structural strength and the corrosion resistance ofthe bolt and ensuring the stability and the reliability of bolt connection for a long time.

Description

【Technical field】 [0001] The invention relates to the technical field of fasteners, in particular to a corrosion-resistant high-strength hexagonal bolt. 【Background technique】 [0002] High-strength bolts refer to bolts made of high-strength steel, or bolts that require a large pre-tightening force, which can be called high-strength bolts. High-strength bolts are mostly used for the connection of bridges, rails, high-pressure and ultra-high-pressure equipment. The fracture of such bolts is mostly brittle fracture. The high-strength bolts used in ultra-high-pressure equipment require a large prestress to ensure the sealing of the container. High-strength hexagonal bolts are a type of high-strength bolts. The clamping of the plate parts of the connecting plate is enough to generate a large friction force, thereby improving the integrity and rigidity of the connection. Therefore, high-strength hexagonal bolts are permanent connections, and the corrosion resistance of the bolt...

AI Technical Summary

Problems solved by technology

The high-strength bolts used in ultra-high-pressure equipment require a large prestress to ensure the sealing of the container. High-strength hexagonal bolts are a type of high-strength bolts. The clamping of the plate parts of the connecting plate is enough to generate a large friction force, thereby improving the integrity and rigidity of the connection. Therefore, high-strength hexagonal bolts are permanent connections, and the corrosion resistance of the bolts, as well as the bolt’s corrosion resistance, must be considered during the design process. The structural strength of the bolt, the conventional method is to carry out appropriate heat treatment after the bolt is manufactured, and coat a layer of corrosion-resistant layer on the surface to improve the structural strength and corrosion resistance of the bolt. However, after long-term service, the corrosion resistance of the surface The layer will gradually lose its corrosion resistance effect, which will cause the bolts to rust, reduce the structural strength, and eventually lead to the failure of brittle fracture of the bolt connection. Therefore, it is necessary to propose a corrosion-resistant high-strength hexagonal bolt

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