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Power transmission tower bolt eccentric anti-loosening cap

A technology of anti-loosening caps and transmission towers, applied in the directions of bolts, screws, nuts, etc., can solve the problems of difficulty in the transformation of anti-loosening and tightening, poor anti-loosening effect of bolts, complicated processing and installation, etc., and achieve simple processing and installation. Convenience, anti-loose fastening, easy modification, and enhanced fastening effect

Inactive Publication Date: 2021-04-02
CHINA ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Aiming at the conventional anti-loosening effect of the commonly used bolts for transmission towers is not good, the bolts loosen or fall off due to the reduction of the axial pre-tightening force of the bolts, the anti-loosening type is single, the durability is poor, and its processing and installation are relatively complicated , low degree of reusability, difficult modification of anti-loosening fastening of bolts 16 and lower nuts 19 of existing and new transmission towers, and poor versatility

Method used

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  • Power transmission tower bolt eccentric anti-loosening cap
  • Power transmission tower bolt eccentric anti-loosening cap
  • Power transmission tower bolt eccentric anti-loosening cap

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as figure 1 As shown, the present invention provides a transmission tower bolt eccentric anti-loosening cap, the eccentric anti-loosening cap 15 is sleeved on the bolt 16 and arranged outside the nut 19,

[0039] The inner wall of the eccentric anti-loosening cap 15 has serrations 5 , and the eccentric anti-loosening cap 15 is tightly locked with the outside of the nut 19 through the serrations 5 .

[0040] Further preferably, the sawtooth 5 may be one or a combination of shapes such as triangle, pagoda, cone or column.

[0041] Further preferably, there are multiple sawtooths 5 distributed in a matrix or quincunx shape.

[0042] Further preferably, the serrations 5 are distributed in a fan shape on the inner wall of the wedge section, and the central angle corresponding to the range of the fan shape is 60°-180°.

[0043] Further preferably, the height of the sawtooth 5 is set according to the height of the external thread of the bolt 16 and the diameter of the ou...

Embodiment 2

[0050] Based on the same inventive idea, such as figure 1 and Figure 6 As shown, the present invention also provides an eccentric anti-loosening cap for transmission tower bolts. The inner wall of the eccentric anti-loosening cap 15 is provided with a plurality of groove structures, and the shape of the groove structure can be linear, S-shaped, polygonal or round.

[0051] Further preferably, the groove structure is a plurality of opening grooves 4 , and the opening grooves 4 are distributed on the inner wall of the eccentric anti-loosening cap 15 along the axial direction or the circumference of the eccentric anti-loosening cap 15 .

[0052] Further preferably, a sharp corner is provided at the bottom of the opening groove 4 , and the point of the sharp corner faces toward the axis of the eccentric anti-loosening cap 15 .

[0053] Further preferably, the plurality of opening grooves 4 are located in the threaded section, and when the eccentric lock cap 15 and the bolt 16 ...

Embodiment 3

[0061] Based on the same inventive idea, such as figure 1 and Figure 6 As shown, the present invention also provides an eccentric anti-loosening cap for transmission tower bolts. The eccentric anti-loosening cap 15 is an integrated structure, and the integrated structure includes a wedge-shaped section of a hollow conical structure and a hollow structure from bottom to top. thread segment. The central axis of the wedge segment has an eccentric distance from the central axis of the bolt 16 .

[0062] Further, the inner wall surface of the wedge section is smooth and has no threads, and the eccentric distance between the central axis of the eccentric anti-loosening cap 15 and the central axis of the bolt 16 is in the range of 0.3-1 mm, more preferably 0.8 mm.

[0063] Compared with prior art, the beneficial effect of the present invention is:

[0064] The invention has an eccentric distance between the central axis of the wedge-shaped section and the central axis of the bol...

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Abstract

The invention provides a power transmission tower bolt eccentric anti-loosening cap. The eccentric anti-loosening cap (15) is arranged on a bolt (16) in a sleeving mode and arranged on the outer sideof a nut (19), sawteeth (5) are arranged on the inner wall of the eccentric anti-loosening cap, and the eccentric anti-loosening cap and the outer side of the nut are locked through the sawteeth. According to the power transmission tower bolt eccentric anti-loosening cap, the defect that a bolt commonly used by a power transmission tower is poor in anti-loosening effect is overcome, the fasteningeffect of the bolt and the nut is further enhanced, pre-tightening force which is perpendicular to the bolt and applied by the nut is enhanced, axis pre-tightening force and radial pre-tightening force of the bolt are not prone to being weakened, and the anti-loosening durability is high; and the power transmission tower bolt eccentric anti-loosening cap is simple and convenient to process and install, low in manufacturing cost, reusable, easy for anti-loosening fastening transformation of bolts and nuts of built and newly-built power transmission towers, and high in universality.

Description

technical field [0001] The invention belongs to the field of transmission lines, and in particular relates to an eccentric anti-loosening cap for transmission tower bolts. Background technique [0002] The bolted connection is guaranteed to be reliable and self-locking by the pretightening force, and it is the most common form used in mechanical detachable connection. The transmission towers in power transmission and transformation projects currently use cold-headed hot-dip galvanized hexagon head rough (grade C) bolts and nuts. When the static load and working temperature do not change much, the bolt connection is generally reliable. The typical structure in power transmission and transformation projects - the transmission tower, has been affected by natural environmental factors for a long time. Under dynamic loads (strong wind, wire dancing, deicing jump) or large temperature differences, it may cause loosening of bolt connections, resulting in The reduction or even disa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B39/12F16B37/00
CPCF16B39/128F16B37/00
Inventor 李清华胡晓光韩军科李茂华朱彬荣黄耀杨风利苏志钢邢海军吴静刘亚多
Owner CHINA ELECTRIC POWER RES INST