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An analog measurement device and measurement method for static friction coefficient of galvanized steel plate of iron tower

A technology of static friction coefficient and galvanized steel sheet, which is applied to measuring devices, mechanical devices, instruments, etc., can solve the problems of measuring the static friction coefficient and difference of galvanized steel sheet of iron tower, and achieve the effect of strong repeatability and improved accuracy.

Active Publication Date: 2016-02-03
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pressure that can be applied per unit area by these two methods is limited by the mass of heavy objects and cannot be infinitely increased. However, the coefficient of static friction is different under high contact pressure and under the pressure exerted by gravity.
At present, there is no method to simulate the actual working conditions of iron tower angle steel to measure the static friction coefficient of iron tower galvanized steel plate under high contact pressure

Method used

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  • An analog measurement device and measurement method for static friction coefficient of galvanized steel plate of iron tower
  • An analog measurement device and measurement method for static friction coefficient of galvanized steel plate of iron tower
  • An analog measurement device and measurement method for static friction coefficient of galvanized steel plate of iron tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] As attached figure 1 , 2 , The analog measuring device of the present invention is composed of upper galvanized steel sheet 1, middle galvanized steel sheet 2, lower galvanized steel sheet 3, sleeve 6 and pressure sensor 7; on the lower end of the upper galvanized steel sheet 1 and the lower galvanized steel sheet The upper ends of the steel plate 3 are respectively provided with bolt holes with equal diameters, and the upper and lower ends of the middle galvanized dry plate 2 are respectively provided with bolt holes with the same diameter as the bolt holes; the sleeve 6, the pressure sensor 7, The upper ends of the upper galvanized steel sheet 1 and the middle galvanized steel sheet 2 are sequentially connected by a first bolt 4 and a first nut 5; the lower end of the middle galvanized steel sheet 2 and the lower galvanized steel sheet 3 are connected by a second bolt 9 and a second nut 10Connect. A first washer 8 is sleeved on the first bolt 4 between the middle galva...

Embodiment 2

[0057] The difference between Example 2 and Example 1 is that there is no washer between the steel plate and the nut. The test can be stopped when the sliding between the upper galvanized steel sheet 1 and the middle galvanized steel sheet 2 is blocked, so removing the washer does not Affect the accuracy of test data.

Embodiment 3

[0059] The simulation measuring device of Example 1 was used to measure the static friction coefficient of the galvanized steel tower under high contact pressure.

[0060] Step 1: Clamp the upper end of the upper galvanized steel sheet 1 and the lower end of the lower galvanized steel sheet 3 into the upper and lower clamps of the tensile testing machine, respectively, and connect the output cable of the pressure sensor 7 to the tensile test Connect the corresponding input terminals of the machine. The upper galvanized steel sheet 1, the middle galvanized steel sheet 2 and the lower galvanized steel sheet 3 of this embodiment are all galvanized steel sheets with a width of 120mm and a thickness of 10mm. The hole diameter is Ф21.5mm. The punching process is adopted. Zinc. The specifications of the first bolt 4, the first nut 5, the first washer 8, the second bolt 9, the second nut 10, and the second washer 11 in this embodiment are M20, galvanized, and multiple sets. The sensor ...

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Abstract

The present invention relates to a simulation measurement apparatus for an iron tower zinc plating steel plate static friction coefficient, and a method for measuring an iron tower zinc plating steel plate static friction coefficient by using the simulation measurement apparatus, wherein the simulation measurement apparatus is installed in a tension tester, and a pressure sensor is adopted to measure. According to the present invention, the method can be implemented in a laboratory, operations are convenient, the measurement result is accurate, and guiding significance is provided for evaluation of the whole structure and stability of the iron tower.

Description

Technical field [0001] The invention relates to a simulation measuring device for the static friction coefficient of the galvanized steel sheet of an iron tower, and a method for measuring the static friction coefficient of the galvanized steel sheet of an iron tower by using the simulation measuring device. Background technique [0002] The iron tower connects the main material and the main material, and the main material and the oblique material together by bolts. The connection points are called nodes. When the main material and the main material are connected, the upper and lower main materials are connected together by the node plate. The main material transmission force is transmitted through the friction force of the bolt shear force and the bolt pre-tightening force to compress the contact surface of the tower material. When the bolt pre-tightening force is large enough, the force transmission method between the tower materials should be based on friction; when the intera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/02
Inventor 柯浩冯砚厅孙澎徐雪霞王勇
Owner STATE GRID CORP OF CHINA
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