雨(yu)(yu)水(shui)(shui)斗(dou)屬于金(jin)屬落水(shui)(shui)系統(tong)分支，是(shi)設在屋面雨(yu)(yu)水(shui)(shui)由天溝進入(ru)(ru)雨(yu)(yu)水(shui)(shui)管道的入(ru)(ru)口處。雨(yu)(yu)水(shui)(shui)斗(dou)有(you)整流格柵裝(zhuang)置,能迅(xun)速(su)(su)排除(chu)屋面雨(yu)(yu)水(shui)(shui),格柵具有(you)整流作(zuo)用,避免形成過大(da)的旋(xuan)渦,穩(wen)定斗(dou)前水(shui)(shui)位,減少摻氣 迅(xun)速(su)(su)排除(chu)屋面雨(yu)(yu)水(shui)(shui)、雪水(shui)(shui),并能有(you)效阻擋(dang)較大(da)雜物。

   雨(yu)(yu)水(shui)(shui)斗設在屋(wu)面雨(yu)(yu)水(shui)(shui)由天(tian)溝(gou)進(jin)入雨(yu)(yu)水(shui)(shui)管道的(de)入口處。雨(yu)(yu)水(shui)(shui)斗有(you)整流格(ge)柵裝置,能(neng)迅(xun)(xun)速排(pai)(pai)除屋(wu)面雨(yu)(yu)水(shui)(shui),格(ge)柵具有(you)整流作用,避免形成過(guo)大(da)(da)的(de)旋(xuan)渦(wo),穩定斗前水(shui)(shui)位(wei),減少摻氣 迅(xun)(xun)速排(pai)(pai)除屋(wu)面雨(yu)(yu)水(shui)(shui)、雪水(shui)(shui),并能(neng)有(you)效阻擋較(jiao)大(da)(da)雜物。雨(yu)(yu)水(shui)(shui)斗與天(tian)溝(gou)，落(luo)水(shui)(shui)管組建成的(de)金屬落(luo)水(shui)(shui)系統(tong)，起到裝飾性(xing)(xing)和(he)實(shi)用性(xing)(xing)。         

排水(shui)(shui)(shui)(shui)雨(yu)水(shui)(shui)(shui)(shui)斗(dou)(dou)是一種專用裝置，設(she)在(zai)屋(wu)面雨(yu)水(shui)(shui)(shui)(shui)由天溝進(jin)入雨(yu)水(shui)(shui)(shui)(shui)管道的入口(kou)處。雨(yu)水(shui)(shui)(shui)(shui)斗(dou)(dou)有(you)整(zheng)流格(ge)柵(zha)裝置，格(ge)柵(zha)的進(jin)水(shui)(shui)(shui)(shui)孔有(you)效(xiao)面積是雨(yu)水(shui)(shui)(shui)(shui)斗(dou)(dou)下連(lian)接管面積的2~2.5倍，能迅速排除(chu)屋(wu)面雨(yu)水(shui)(shui)(shui)(shui)。格(ge)柵(zha)還具有(you)整(zheng)流作(zuo)用，避免形(xing)成過大的漩渦，穩定斗(dou)(dou)前(qian)水(shui)(shui)(shui)(shui)位(wei)，減少摻氣，并攔隔樹(shu)葉等雜物(wu)。當采用多斗(dou)(dou)排水(shui)(shui)(shui)(shui)系(xi)統(tong)時，為(wei)了使相應(ying)雨(yu)水(shui)(shui)(shui)(shui)斗(dou)(dou)泄(xie)流量(liang)均(jun)勻，雨(yu)水(shui)(shui)(shui)(shui)斗(dou)(dou)宜對(dui)立管作(zuo)對(dui)稱布置。1根(gen)懸吊管上連(lian)接的雨(yu)水(shui)(shui)(shui)(shui)斗(dou)(dou)不(bu)得多于4個，且雨(yu)水(shui)(shui)(shui)(shui)斗(dou)(dou)不(bu)能設(she)在(zai)立管頂端(duan)。 [1]

雨(yu)(yu)(yu)(yu)(yu)(yu)水(shui)(shui)(shui)(shui)(shui)斗(dou)(dou)(dou)設在屋(wu)(wu)面(mian)雨(yu)(yu)(yu)(yu)(yu)(yu)水(shui)(shui)(shui)(shui)(shui)由天溝進入雨(yu)(yu)(yu)(yu)(yu)(yu)水(shui)(shui)(shui)(shui)(shui)管道(dao)的入口處。雨(yu)(yu)(yu)(yu)(yu)(yu)水(shui)(shui)(shui)(shui)(shui)斗(dou)(dou)(dou)有(you)(you)整(zheng)流(liu)(liu)格柵(zha)(zha)裝置(zhi),能(neng)迅速(su)排除(chu)(chu)屋(wu)(wu)面(mian)雨(yu)(yu)(yu)(yu)(yu)(yu)水(shui)(shui)(shui)(shui)(shui),格柵(zha)(zha)具有(you)(you)整(zheng)流(liu)(liu)作(zuo)用,避免(mian)形(xing)成過大(da)的旋渦,穩定斗(dou)(dou)(dou)前(qian)水(shui)(shui)(shui)(shui)(shui)位,減少(shao)摻氣 迅速(su)排除(chu)(chu)屋(wu)(wu)面(mian)雨(yu)(yu)(yu)(yu)(yu)(yu)水(shui)(shui)(shui)(shui)(shui)、雪(xue)水(shui)(shui)(shui)(shui)(shui),并能(neng)有(you)(you)效(xiao)阻擋(dang)較大(da)雜(za)物雨(yu)(yu)(yu)(yu)(yu)(yu)水(shui)(shui)(shui)(shui)(shui)斗(dou)(dou)(dou)分為87型(xing)(xing)、79型(xing)(xing)、65型(xing)(xing)，虹(hong)(hong)吸(xi)式(shi)雨(yu)(yu)(yu)(yu)(yu)(yu)水(shui)(shui)(shui)(shui)(shui)斗(dou)(dou)(dou)，堰流(liu)(liu)式(shi)雨(yu)(yu)(yu)(yu)(yu)(yu)水(shui)(shui)(shui)(shui)(shui)斗(dou)(dou)(dou)三大(da)類。一般(ban)用87型(xing)(xing)(79型(xing)(xing)、65型(xing)(xing)進化版(ban))和虹(hong)(hong)吸(xi)式(shi)雨(yu)(yu)(yu)(yu)(yu)(yu)水(shui)(shui)(shui)(shui)(shui)斗(dou)(dou)(dou)。雨(yu)(yu)(yu)(yu)(yu)(yu)水(shui)(shui)(shui)(shui)(shui)斗(dou)(dou)(dou)有(you)(you)整(zheng)流(liu)(liu)格柵(zha)(zha)裝置(zhi),能(neng)迅速(su)排除(chu)(chu)屋(wu)(wu)面(mian)雨(yu)(yu)(yu)(yu)(yu)(yu)水(shui)(shui)(shui)(shui)(shui),格柵(zha)(zha)具有(you)(you)整(zheng)流(liu)(liu)作(zuo)用,避免(mian)形(xing)成過大(da)的旋渦,穩定斗(dou)(dou)(dou)前(qian)水(shui)(shui)(shui)(shui)(shui)位,減少(shao)摻氣 迅速(su)排除(chu)(chu)屋(wu)(wu)面(mian)雨(yu)(yu)(yu)(yu)(yu)(yu)水(shui)(shui)(shui)(shui)(shui)、雪(xue)水(shui)(shui)(shui)(shui)(shui),并能(neng)有(you)(you)效(xiao)阻擋(dang)較大(da)雜(za)物。