| With the development of our country’s urbanization process,urban underground pipelines have become an indispensable infrastructure in urban development.However,as the service life continues to increase,the damage,aging,and fragmentation of underground pipelines are becoming more and more serious and urgently need to be repaired.The use of UV-curable composite material hoses for pipeline non-excavation repair can greatly shorten the construction period,reduce repair costs,and effectively solved the traffic jam caused by pipeline excavation during the repair process.However,there are some problems such as low automation,poor product consistency,uneven resin injection,and unstable quality of lined hoses in the current production of UV-curable CIPP lined hoses.Therefore,this paper studied the production process of UV-curing CIPP hose automatic resin injection,and designed the CIPP hose automatic resin injection production line and its control system based on fixed-length step-bystep transportation and integrated online vacuum injection technology to realize UVcuring hose high-efficiency,high-quality automated resin injection production.In this paper,a fixed-length step-by-step multi-segment hose conveying and resin injection platform are designed to realize automatic hose injection and continuous hose delivery after injection.In order to solve the problems of the poor synchronization of the conveyor belt movement during multi-section conveying,which leads to the stretching,wrinkling or even tearing of the outer anti-ultraviolet film of the hose,an improved deviation coupling method is adopted to control the synchronization of the multi-section conveyor belt drive motor.The fuzzy PID controller is added on the basis of the deviation coupling control method,and the synchronization accuracy of the conveyor drive motors are further improved,and MATLAB is used for simulation verification.The results show that the improved deviation coupling control method has a good control effect in the synchronous control of the conveyor drive motors,so as to ensure the production quality of the resin injection hose.In order to achieve rapid mixing of resin and thickener and efficient impregnation of glass fiber cloth,the vacuum injection process of UV-cured CIPP hose is studied,and the integrated vacuum resin injection system which has functions of online mixing,temperature control,defoaming and vacuum injection is designed.The resin injection system uses a static mixer to achieve high-efficiency mixing of resin and thickener,based on on-line deaeration and resin temperature control technology to improve the consistency of the product quality of the resin injection hose,and realize highprecision control of the raw material mixing ratio based on the closed-loop control of the transfer pump.The CIPP hose integrated vacuum resin injection control system is designed based on PLC and touch screen,which realizes high-precision resin mixing,conveying and hose online resin injection control.According to the requirements of the automated resin injection process for the UV-cured CIPP liner designed in this paper,the vacuum injection experiment of resinimpregnated fiber cloth,the liner injection and the ultraviolet curing experiment were carried out,which verified the feasibility of the production process designed in this paper,and provided a basis for design and optimization of production process.The operation effect of the production line shows that the automatic liner injection production line designed in this paper can realize the efficient and high-quality liner injection production,improve the automation degree of the UV curing CIPP lined hose injection production line,and ensure the consistency,uniformity and stability of the product. |
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