重力式无阀滤池与虹吸滤池集水系统,我省采用过砾石滤板、钢筋平格栅、钢筋混凝土孔板加尼龙网以及木格栅等形式,它们各有优缺点,其中木格栅在我省深受欢迎。自1974年以来,我省新建或翻修的重力式无阀滤池集水系统基本上均采用木格栅形式。这种格栅的优点是:就地取材,加工较简单,造价低廉,安装轻便以及检修装拆灵活等;其缺点是:上部需要多种级配的卵石支承层(200～300毫米),配水不易均匀,并使池高增加。木格栅是用20×80毫米(或15×60毫米)的木条(松木或杂木)拼成组装单元(块)。每 Gravity valveless filter and siphon filter catchment system, our province has used gravel filter plate, steel flat grille, reinforced concrete orifice plate plus nylon mesh and wood grille and other forms, they have their own advantages and disadvantages, including the Muge The gate is very popular in our province. Since 1974, the gravity-type valveless filter catchment newly built or renovated in our province has basically adopted the form of wood gratings. The advantages of this type of grille are: local materials, simple processing, low cost, easy installation, and easy installation and removal; the disadvantages are: the upper part requires a variety of gradation of the pebble support layer (200 ~ 300 mm), with water Not uniform, and increase the pool height. The wooden grille is made up of 20 x 80 mm (or 15 x 60 mm) wooden strips (pine or mixed wood) into assembled units (blocks). each