| Two-component epoxy resin has superior performance in the repair of asphalt pavement cracks.It can be realized by mixing and curing components A and B into the pavement cracks at normal temperature.However,the functional design of the existing pavement seam filling machine is mainly aimed at asphalt material,which restricts the further application of two-component epoxy resin in pavement crack repair.In this paper,the research on the technology and the design of the main structure of the two-component epoxy resin filling machine is of great significance for promoting the application of the two groups of classified filling materials.In this paper,the key technologies of two-component epoxy resin filling machine mainly include the following aspects.Firstly,according to the performance requirements of pavement crack repair materials in different areas,the performance advantages of two-component epoxy resin materials were introduced by comparing with other materials.Determine the process of opening slot filling joint,and introduce the repair construction process of opening slot filling joint.Then,the key parts of the sewing machine are designed.Compared with the structure of the jet nozzle,the structure of the nozzle is designed to combine the convergence type and the diffusion type flow channel.By comparing different types of mixers and combining the characteristics of twocomponent epoxy resin material,SK type static mixer is selected as the mixing mechanism of the sewing filling machine.According to the viscosity of epoxy resin,the gear pump is selected as the pump source,and the overflow throttle valve is selected to adjust the proportion of components.A joint filling system with functions of filling,cleaning and composition ratio was designed.And the corresponding parts are calculated and selected to determine the overall structure of the sewing machine.Then Fluent,a fluid simulation software,was used to simulate and optimize the pavement filling model and SK static mixer.The results show that the slotting depth to width ratio is 3:2,the nozzle depth from the bottom of the groove is 16 mm,the inlet velocity is 0.5 m/s,the inlet pressure is 0.03 MPa,and the nozzle internal cutting Angle is 60°.The inhomogeneous coefficient cov was used to evaluate the mixing effect of the mixer.The orthogonal experiment was used to design simulation experiments for different proportions of components A and B,and the mixer of the slotting machine was determined to have a ratio of length to diameter of 1.5,a torsion Angle of 180°,a thickness of 1.5mm and a number of 6.The nozzle and mixer simulation models were established with Modelica language,and the irrigation and joint system simulation model was built with hydraulic components in the system simulation software MWorks.The analysis shows that different component ratios can be realized by the relief throttle valve adjustment,and the nozzle outlet flow rate is stable at 5.32 L /min.By controlling the connection between the cleaning tank and the A and B component tank,it can realize the conversion of the filling joint system and cleaning conditions. |
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