Bolt connecting pair and installation method thereof

Abstract

The invention provides a bolt connecting pair and an installation method thereof. The bolt connecting pair is used for fixing at least two connecting pieces and comprise a bolt (1), a first nut (2) and a second nut (3), wherein the bolt (1) is provided with double spiral external threads with different spiral angles, and the second nut (3) and the first nut (2) are respectively provided with internal threads matched with the external threads with different spiral angles. The bolt connecting pair has a simple structure, does not need finish machining, and greatly reduced cost. The first nut (2)and the second nut (3) with different internal threads have different strokes during rotating and loosening, and the first nut (2) can prevent loosening of the second nut (3), so that a good anti-loosening effect is achieved. The bolt connecting pair provided by the invention is simple for construction and has a wide application range.

Description

technical field [0001] The invention relates to the technical field of power transmission lines, in particular to a bolt connection pair and an installation method thereof. Background technique [0002] Bolt connection is one of the most commonly used and simplest and most effective connection forms in transmission towers, which has the advantages of simple structure, convenient disassembly and low cost. The connection stiffness, damping performance and reliability of bolted connections are crucial to the safety of the entire structure. When the bolts of the transmission tower are tightened, torque will be generated in the bolts, and the release of the torque will reduce the pre-tightening force of the bolts; at the same time, under the conditions of dynamic load (wind vibration or galloping) or large temperature difference, the bolt connection is easy to loosen or even fall off. Bolt connection failure is one of the important causes of collapse accidents. [0003] The bo...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of complex structure, need for finishing, and high cost in the above-mentioned prior art, the present invention provides a bolt connection pair and its installation method. The bolt connection pair is used to fix at least two connecting parts, including bolts (1 ), the first nut (2) and the second nut (3); the bolt (1) has double-helix external threads with different helix angles, and the second nut (3) and the first nut (2) are respectively provided with The internal thread matched with the external thread of different helix angles has a simple structure and no need for finishing, which greatly reduces the cost

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