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Double-nut lock bolt set and construction method

A technology of anti-loosening bolts and construction methods, applied to nuts, bolts, screws, etc., can solve the problems of increasing the absolute value and discreteness of the torque coefficient of the bolts, high cost of high-quality double-tooth anti-loosening washers, and reducing the anti-loosening ability. , to achieve the effect of improving safety and stability, low anti-loosening cost and long service life

Inactive Publication Date: 2021-10-22
QINGDAO SINOSTRO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anti-loosening nut makes the thread of the nut more uniform and effective frictional resistance between the tightened nut and the thread of the bolt by finishing the nut thread, preventing the nut from turning, but at the same time increases the absolute value and discreteness of the bolt torque coefficient, Higher and more stable bolt preload cannot be applied without lubricating grease, and applying lubricating grease will reduce its anti-loosening ability
The anti-loosening ability of double-tooth lock washers largely depends on the manufacturing accuracy of the washer material. Inferior-quality washers are likely to be counterproductive, while high-quality double-tooth lock washers cost more

Method used

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  • Double-nut lock bolt set and construction method
  • Double-nut lock bolt set and construction method
  • Double-nut lock bolt set and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A two-nut anti-lactor group comprising a high strength bolt 2, a upper nut 4, a lower nut 3, an upper washer 51, the high strength bolt 2, the upper nut 4, the lower nut 3, and the upper washer 51 are both zinc. The high-strength bolt 2 passes through the connecting plate 1, the nut 3 is mounted, and the lower nut 3 is applied with the torque wrench to apply a torque 1T, and the lower nut 3 is applied to the high-strength bolt screw, threaded locking agent 6, and then mount the gasket 51 And the upper nut 4, the upper nut 4 is applied to the upper nut 4 by a torque wrench, and finally the reverse torque of 0.185T is applied to the high strength bolt head, and the bolt residual torque is released.

Embodiment 2

[0033] like figure 1 with image 3 A two-nut anti-lactor group including a high strength bolt 2, a upper nut 4, a lower nut 3, an upper washer 51, a medium washer 52, the high strength bolt 2, the upper nut 4, the lower nut 3, the upper washer 51, medium All the surface of the gasket 52 is a Daclo coating, and the high strength bolt 2 passes through the connecting plate 1, mounting the mine washer 52, the lower nut 3, and the lower nut 3 is applied with a torque wrench to apply torque 1T, and the lower nut 3 is installed after the high strength bolt The screw is applied to the high-strength thread lock reactant 6, thereby mounting the upper gasket 51, the upper nut 4, and the upper nut 4 is applied to the upper nut 4 by a torque wrench, and finally the reverse torque 0.25T is applied to the high strength bolt 2, release bolt residue Torque. Daclo coating is not wear-resistant, the installation process cannot avoid coating damage, after the installation is completed, the inorganic z...

Embodiment 3

[0035] like figure 2 , A two-nut anti-lactor group includes a high strength bolt 2, a upper nut 4, a lower nut 3, an upper washer 51, a medium washer 52, a lower washer 53, and passes the high strength bolt 2 through the lower washer 53, the connecting plate 1, mount Medium washer, lower nut 3, using a torque wrench to apply a torque 1T, after the lower nut 3 is installed, the threaded locking agent 6 is applied to the high-strength bolt, and the upper gasket 51 and the upper nut 4 are mounted, and the torque wrench is utilized. The torque 1.1T is applied to the upper nut 4, and finally the reverse torque of 0.185t is applied to the high strength bolt head, and the bolt residual torque is released.

[0036] Example 1, Example 2, Example 3 proposed a two-nut anti-lamination bolt group and construction method, by realizing the bolt preloading force in a non-lubricating grease installation environment, through a non-lubricating grease installation environment Establish a reliable dou...

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Abstract

The invention discloses a double-nut lock bolt set in the field of framework type wind power towers in the towering steel structure technology. The double-nut lock bolt set comprises a high-strength bolt, a lower nut, an upper nut and an upper gasket, wherein the upper gasket is arranged between the lower nut and the upper nut, the high-strength bolt penetrates through a connecting plate and is sequentially connected with the lower nut, the upper gasket and the upper nut. The construction method comprises the following steps that firstly, the high-strength bolt penetrates through the connecting plate, the lower nut is installed, and a torque wrench is used for applying torque to the lower nut to set pre-tightening force; secondly, the upper gasket is installed, and a screw rod of the high-strength bolt is coated with a thread locking agent after installation is completed; thirdly, the upper nut is installed, and torque setting pre-tightening force is applied to the upper nut through the torque wrench; and fourthly, reverse torque is applied to the head of the high-strength bolt. The double-nut lock bolt set has the beneficial effects that a double-nut self-locking structure is used for preventing loosening, the anti-loosening performance is improved through a thread locking agent, the stability is good, and the service life is long.

Description

Technical field [0001] The present invention relates to the field of high-tech steel structure, in particular, involving a two-nut anti-lamination bolt and construction method. Background technique [0002] As the wind tower hub is continuously rising, the form of conventional single tube steel tower faces challenges, and there is a structural wind tower structure, and the components are often connected by friction-type shear bolts. Wind power tower is significant under wind load and mechanical operation, and in the structural life cycle, the node will bear millions of reciprocated dum matter loads. According to the research results of domestic and foreign scholars, the node bolts that are subjected to the pull-down load load are compared to the node bolts of the pull-down load, and the node bolts that are more likely to be loose or even dropped, affecting structural security. [0003] At present, the most commonly used method of the wind power industry responds to the rush of th...

Claims

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Application Information

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IPC IPC(8): F16B39/12F16B5/02
CPCF16B39/12F16B5/02
Inventor 王同华张强裘科一
Owner QINGDAO SINOSTRO TECH CO LTD
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