Visual back -up sand board

The utility model provides a visual back -up sand board, including bottom plate, apron, guiding gutter and fastening components, bottom plate and apron are transparent material, and the bottom plate middle part sets up a positive square groove as the back -up sand chamber, the two sides sets up respectively and firstly prevents that wall flow membrane, second prevent the wall flow membrane about the back -up sand chamber. The utility model discloses the observation that can know goes out flow of fluid form in the back -up sand board, and it has overcome the not visual and poor shortcoming of back -up sand process repeatability of conventional sand -packed model displacement process, in addition the utility model discloses a back -up sand board can be put and observe under microcosmic highpower imaging system to can prevent the emergence of wall flow phenomenon among the microcosmic displacement process. 本实用新型提供了种可视化填砂板，包括底板、盖板、导流槽和紧固组件，底板和盖板为透明材质，底板中部设置个正方形凹槽作为填砂腔，所述填砂腔上下两面分别设置第防壁流膜、第二防壁流膜。本实用新型可以清楚的观察出填砂板中流体