Double-section high-strength bolt anti-loosening connecting joint for space grid structure and construction and installation method thereof

Abstract

The invention discloses a double-section high-strength bolt anti-loosening connecting joint for a space grid structure and a construction and installation method thereof. The double-section high-strength bolt anti-loosening connecting joint comprises a joint body, a double-section high-strength bolt, an inner nut, an outer nut, an anti-loosening washer and a rod piece end connecting piece; a screwrod of the double-section high-strength bolt is divided into a large thread section and a small thread section; the inner nut and the outer nut are matched with the large thread section of the double-section high-strength bolt, and a bolt hole of the joint body is matched with the small thread section of the double-section high-strength bolt; and the anti-loosening washer is composed of two identical washers, and the two faces of each washer are sawtooth-shaped. According to the joint, the bolts are screwed into the joint body through the locking effect of the bolts when the double nuts abutagainst each other, construction and installation are convenient, and the construction quality is easily guaranteed; the combination of the nut and the anti-loosening washer can effectively resist loosening of the joint during vibration caused by wind or earthquakes and the like, and the joint is high in reliability; and when the joint body is a bolt ball, the bolt ball body does not need to be cut, thereby reducing the diameter of the bolt ball and saving steel consumption.

Description

Technical field [0001] This patent relates to connection nodes of a spatial grid structure and belongs to the field of architectural steel structures. Background technique [0002] The spatial grid structure has been widely used worldwide. Bolt connection nodes conform to the trend of building industrialization and are easy to ensure construction quality. They are one of the main node forms of spatial grid structures. However, the bolt connection nodes with sleeves commonly used in spatial grid structures have the following shortcomings: their installation is to drive bolts into the node body through the pins on the sleeves. Due to processing errors and other reasons, the pins may be subject to greater shear. The high-strength bolts cannot be tightened due to the force and the high-strength bolts cannot be tightened, that is, the phenomenon of "false screwing" occurs; the high-strength bolts are hidden in the sleeve, and it is impossible to intuitively judge whether the high-str...

AI Technical Summary

Problems solved by technology

However, the bolted joints with sleeves commonly used in space grid structures have the following disadvantages: the installation is through the pins on the sleeves to drive the bolts into the joint body. Due to processing errors and other reasons, the pins may be damaged due to large shear The high-strength bolts cannot be tightened, that is, the phenomenon of "false tightening" occurs; the high-strength bolts are hidden in the sleeve, and it is impossible to visually judge whether the high-strength bolts are tightened after installation; the pin head needs to be screwed initially during the installation process into the shallow groove on the high-strength bolt, after the sleeve is rotated, the head of the pin needs to be screwed into the deep groove on the high-strength bolt, and the construction is cumbersome

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