Anchor bolt for marine wind power base

Abstract

The invention discloses an anchor bolt for a marine wind power base, which comprises a screw rod (1), wherein both ends of the screw rod (1) are respectively provided with a thread section (2); at least one end of the screw rod (1) is provided with a protective nut (3), a gasket (4) and an antirust cover (5) capable of covering the exposed thread section (2); the surfaces of the screw rod (1), the nut (3) and the gasket (4) are respectively provided with a chromium-free Dacromet coating (6); an epoxy glass lamella coating (7) is arranged on the chromium-free Dacromet coating (6) of the screw rod (1); and an anticorrosion sleeve (8) matched with the outer diameter of the screw rod (1) is also sheathed on the screw rod (1). The thread section (2), the gasket (4) and the nut (3) at the end provided with the antirust cover are respectively coated with an epoxy zinc-rich primer which performs the functions of shielding and cathodic protection. The thickness of the chromium-free Dacromet coating (6) is 10.0-11.9 micrometers, and the thickness of the dry film of the epoxy glass lamella coating (7) is 50-80 micrometers.

Description

technical field [0001] The invention relates to a fastener, in particular to an anchor bolt used for the foundation of an offshore wind power generating set. technical background [0002] The anti-corrosion protection life requirement of the steel structure surface of the wind turbine is at least 15 years (in accordance with the ISO12944-1 standard: long-term surface protection), and its anti-corrosion protection goal is to meet the life requirements of 30 years in the marine environment. According to the international standard ISO12944-2, the corrosion level of steel structures in marine environments is C5-M. Although the anchor bolts are located in the package of the foundation cement pile, because seawater or sea mud contains a large amount of chloride ions, it will cause very serious erosion to the anchor bolts through the cement void. Once the anchor bolts in the cement package are corroded, there is almost no possibility of repair. Generally, people will treat them wi...

AI Technical Summary

Problems solved by technology

Once the anchor bolts in the cement package are corroded, there is almost no possibility of repair. Generally, people will treat them with Dacromet to make the metal bolts have a better anti-corrosion effect. However, the anchor bolts are more than 6 meters long. Ordinary dacromet treatment is difficult, and the chromium element contained in ordinary dacromet treatment will cause environmental pollution, which poses a severe challenge to the corrosion protection of the anchor bolts of the offshore wind turbine foundation. Therefore, for offshore wind turbine foundations It is very important to design an anchor bolt that can have a good anti-corrosion effect in the marine environment

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