JP1746125S - Upper outer wall body for lower water catchment - Google Patents

Abstract

This product is an upper outer wall body for a lower water catchment device, and is described in "reference enlarged exploded view showing the name of each part with the middle omitted", "reference enlarged end view showing how to use", and "reference drawing showing how to use". As shown, among a plurality of treatment processes for treating water to be treated such as river water, groundwater, wastewater, etc., a bottom water catchment device is arranged at the bottom of a sand filter pond for filtration or at the bottom of an activated carbon adsorption pond for activated carbon treatment. These are the parts that make up. The lower water catchment device has a filter layer made of granular material such as gravel, sand, anthracite, etc., placed thereon to evenly collect the filtered water flowing down from the filter layer. is dispersed evenly to clean the sand filter basin. That is, at the time of water collection treatment, the lower water catchment device collects filtered water flowing down from the filtration layer as shown by the arrows in the "reference enlarged end view showing the usage method" and the "reference diagram showing the usage method". The article is introduced into the side circulation section through the upper external inflow and outflow holes arranged in the upper outer wall body, and further introduced into the central circulation section through the inner inflow and outflow holes arranged in the inner wall body, and the lower section arranged in the lower outer wall body. Take out from the outflow hole. During the backwashing process, water and/or air are introduced into the central circulation portion through the lower external outflow holes, and introduced into the side circulation portions through the internal inflow and outflow holes, as indicated by the same arrows in both figures, Uniformly dispersed air and/or water is ejected to the filter layer through the upper outer inflow and outflow holes of the article to remove foreign substances in the filter layer. In addition, as shown in the "reference enlarged exploded view showing the name of each part with intermediate parts omitted" and the "reference view showing the method of use", it is also possible to install a perforated plate on the product and use it.