High-strength bolt axial force measuring device and measuring method

A technology of high-strength bolts and measuring devices, which is used to measure torque/torsional force and other directions during tightening, can solve problems such as the closeness of joint plates, the influence of construction error nut reset accuracy, etc., and achieve simple device structure, high measurement accuracy, The effect of simple measurement methods

Inactive Publication Date: 2013-08-14
LONGYUAN BEIJING WIND POWER ENG TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

In this method, the thread state, the closeness of the joint plate, the construction error, the accuracy of the nut reset, etc. have a great influence on the torque value due to the tightening after loosening.

Method used

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  • High-strength bolt axial force measuring device and measuring method
  • High-strength bolt axial force measuring device and measuring method
  • High-strength bolt axial force measuring device and measuring method

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Embodiment Construction

[0032] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0033] The high-strength bolt axial force measuring device of the present invention is mainly used to measure the axial force of the pre-tightened high-strength bolts connecting two parts. This embodiment takes the axial force measurement of the high-strength bolts connected to the wind power tower as an example. The high-strength bolt axial force measuring device is described, but it is not limited to the connection of wind power towers. The axial force measuring device is applicable to any situation where high-strength bolts are used to connect and the axial force needs to be measured.

[0034] For ease of understanding, some words in the present invention are firs...

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Abstract

The invention discloses a high-strength bolt axial force measuring device and measuring method. The measuring device comprises a pull rod, an axial force sensor, a force providing part and a support; the close end of the pull rod is provided with a connecting part for being connected with a high-strength bolt thread end, and the close and far ends of the pull rod are provided with a first match part and a second match part respectively; the first match part is in match contact with the close end face of the axial force sensor, the second match part and the far end of the force providing part act in a match mode, the far end of the support is mounted between the force providing part and the axial force sensor, and the close end of the support is used for being supported on a part connected with a high-strength bolt; and the high-strength bolt axial force measuring device also comprises a strain measuring part arranged on a nut. The measuring method comprises the steps of (1) mounting the strain measuring part on the axial outer face of the nut; 2, connecting the pull rod with the thread end of the high-strength bolt in the match mode; and 3 starting the force providing part to read the value of the axial force sensor at proper time according to the changing condition of the stain measuring part. The high-strength bolt axial force measuring device and method are accurate in measuring by directly measuring the axial force of the high-strength bolt.

Description

technical field [0001] The invention relates to a high-strength bolt axial force measuring device and a measuring method, in particular to a wind power tower high-strength bolt axial force measuring device and a measuring method. Background technique [0002] The high-strength bolts of the wind power tower connect the lower flange of the upper tower and the upper flange of the lower tower of the wind power tower. Bearing loads from all directions for a long time, the load of the tower is finally transmitted to the high-strength bolts connecting the two sections of the tower. [0003] When high-strength bolts are used to connect the two sections of the tower, a pre-tightening force (that is, the axial force of the bolt) needs to be applied to keep the towers tightly fitted together. If the pre-tightening force is greater than the designed pre-tightening force, the high-strength bolts are prone to fatigue and the life cycle is greatly shortened; if the pre-tightening force is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/24
Inventor 肖剑段二顺岳文彦任淮辉曹建忠王红艳陶钢正
Owner LONGYUAN BEIJING WIND POWER ENG TECH
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