Dimenzioniranje i 3D oblikovanje povratne zaklopke s polugom i utegom

This article presents the dimensioning and 3D modeling of a swing check valve with lever and weight in welded design, based on the existing 2D workshop documentation in cast design and reverse engineering. Based on analytical calculations, pipe wall thickness of a swing check valve housing was selected for the nominal pipe diameter DN 300 and water test pressure p = 2.4 MPa. All 3D models of components, as well as the assembly, were made in the program tool SolidWorks. The 3D model of the swing check valve with flanges was subjected to stress analysis (Finite Element Analysis) for the purpose of checking the accuracy of the analytical calculations. Fluid flow analysis (Flow Simulation) was used for presenting fluid flow process and rate through the swing check valve assembly. A low-budget 3D MakerBot Replicator 2X printer was used for constructing a reduced-scale 3D assembly model of the swing check valve with lever and weight, by implementing the FDM (Fused Deposition Modeling) technology.Prikazano je dimenzioniranje i 3D oblikovanje povratne zaklopke s polugom i utegom u zavarenoj izvedbi na temelju postojeće 2D radioničke dokumentacije u lijevanoj izvedbi i reverznog inženjeringa. Na temelju analitičkog proračuna odabrana je debljina stjenke cijevi kućišta povratne zaklopke za nazivni promjer cijevi DN 300 i vodni ispitni tlak p = 2,4 MPa. Svi 3D modeli dijelova, kao i sklop, izrađeni su u programskom alatu SolidWorks. Na 3D modelu kućišta povratne zaklopke s prirubnicama u zavarenoj izvedbi provedena je analiza naprezanja (Finite Element Analysis) sa svrhom provjere točnosti analitičkog proračuna. Analizom strujanja fluida (Flow Simulation) prikazan je tijek i brzine strujanja fluida kroz sklop povratne zaklopke. Na niskobudžetnom 3D MakerBot Replicator 2X pisaču, primjenom FDM tehnologije taložnog očvršćivanja materijala, izrađen je umanjeni 3D model sklopa povratne zaklopke s polugom i utegom