Method for measuring spring stiffness of supporting and hanging frame online

Abstract

The invention relates to a method for measuring the spring stiffness of a supporting and hanging frame online, and aims to provide a method which has the characteristics of fast measurement, accurate data and ability of being simple and convenient. The technical scheme is that the method for measuring the spring stiffness of the supporting and hanging frame online is implemented according to the following steps in sequence: 1) hoist cranes are hung on steel frame structures at two sides of the supporting and hanging frame, a pipeline is hoisted so as to enable the pipeline to break away from the supporting and hanging frame, and load influences imposed on the supporting and hanging frame by the pipeline are eliminated; 2) a strain gauge is attached at the position of a pull rod of the supporting and hanging frame; 3) the cranes are loosened so as to put the pipeline back to the supporting and hanging frame, strain data measured by the strain gauge is read, and the stroke of a spring is recorded at the same time; 4) a material and the section area of the pull rod are acquired according to data of the supporting and hanging frame; 5) the elasticity modulus of the pull rod is determined; and 6) the acquired variables are substituted into a formula.

Description

technical field [0001] The invention relates to a measuring method, in particular to an online measuring method for the spring stiffness of a support and hanger. Background technique [0002] In power plant boilers, the main steam pipeline, high-temperature reheat steam pipeline, low-temperature reheat steam pipeline and water supply pipeline are collectively called the four major pipelines. The support and hanger is an important part of the four major pipeline systems, and its main function is to bear the pipeline load, limit the displacement of the pipeline and control the vibration of the pipeline. The hanger structure is as figure 1 As shown, it includes a support hanger sleeve 3 fixed on a steel frame 8, a support hanger pull rod 1 installed in the support hanger sleeve, a pressing block arranged on the top of the support hanger pull rod, and On the frame pull rod and be positioned at the hanger spring 2 that is installed in the lower end of the pressing block. If pa...

AI Technical Summary

Problems solved by technology

Among them, in the long-term operation process, the gradual change of the spring stiffness of the support and hanger is a relatively hidden form of failure of the support and hanger, which will cause overload or loss of the support and hanger, and cannot be adjusted by adjusting the turnbuckle screw

The online measurement of the spring stiffness of the hanger is a relatively difficult subject, mainly because it is difficult to measure the load of the hanger online; and the measurement of the spring stiffness mainly needs to measure the force and deformation of the spring, but for a single hanger, Due to the load distribution of the entire piping system, it is difficult to measure the load of a single support and hanger

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