Design And Research Of A Rapid Detection Device For Valve Positioners

With the further development of industrial automation,the application of control valves in sectors such as petroleum,chemical,light industry,metallurgy,heating,water supply and drainage,textile,and natural gas has become increasingly extensive,leading to a continuous rise in demand for valve positioners.Industrial enterprises often use a large number of valve positioners that require regular maintenance.Currently,the traditional method of manual inspection is employed,which involves a significant amount of time spent on repetitive tasks such as tightening threads,thereby reducing the economic efficiency of the enterprises.This thesis applies the TRIZ theory to design a rapid testing device for valve positioners.Based on an analysis of the key points in valve positioner testing,a general plan for the rapid testing device is proposed,and three supporting devices are designed to meet the testing requirements.Simulation analysis software is utilized to optimize the details of the proposed solution,and the feasibility of the design is ultimately verified through complete assembly and testing of the device.This study lays the foundation for the design of the testing device by analyzing the working principles,testing process,and maintenance status of valve positioners.An overview of the TRIZ theory and its main tools is provided,and a comprehensive application of tools such as the Ideal Final Result(IFR)and conflict analysis is employed to analyze the design challenges of the positioner testing device.The selection of specific valve positioner models and the adoption of a design approach involving cylinder clamping are proposed after comprehensive analysis,leading to the development of the general plan for the rapid testing device for valve positioners.A modeling of the required air port connector for testing is conducted,and fluid simulation analysis is performed using Flow Simulation software.Based on the required thrust of the air port connector,appropriate cylinders are selected.By analyzing the structural characteristics of TS600,TS800,and TS900 valve positioners,the corresponding positioning brackets are designed.The shape and dimensions of the testing baseplate are defined,and its various components are integrated to obtain the design layout of the baseplate.Simulation analysis software is utilized to conduct stress and deformation analysis of the positioning brackets and testing baseplate for TS600,TS800,and TS900 valve positioners.The bolt diameter of the positioning brackets is determined based on the requirements of stress and deformation,and further optimization of the thickness of the testing baseplate is carried out while satisfying the conditions of stress and deformation.The thickness of the positioner stop plate is optimized based on the deformation characteristics observed in the TS900 simulation.The thickness of the testing baseplate and its positioning brackets is determined based on the results of the simulation analysis.The pneumatic system of the rapid testing device for valve positioners is designed,and its airflow is optimized.The independently developed components of the testing device are manufactured,and market-standard components are purchased for complete assembly and testing,further validating the rationality of the research and the feasibility of the proposed solution for the rapid testing device for valve positioners.