【螺(luo)翼(yi)式水(shui)表(biao)(biao)】螺(luo)翼(yi)式水(shui)表(biao)(biao)的特點 螺(luo)翼(yi)式水(shui)表(biao)(biao)和旋翼(yi)式水(shui)表(biao)(biao)的區別(bie)
螺翼式水表的特點
同旋翼式水表一樣,螺翼式水表也屬于(yu)速度(du)(du)式(shi)水(shui)(shui)(shui)(shui)表(biao)(biao)的一種。當水(shui)(shui)(shui)(shui)流入水(shui)(shui)(shui)(shui)表(biao)(biao)后(hou)(hou),沿軸線方向沖(chong)擊水(shui)(shui)(shui)(shui)表(biao)(biao)螺(luo)翼(yi)形(xing)的葉輪旋轉后(hou)(hou)流出,葉輪的轉速與(yu)(yu)水(shui)(shui)(shui)(shui)流速度(du)(du)成正比,經(jing)過減速齒(chi)輪傳動后(hou)(hou),在指(zhi)示裝(zhuang)置上顯示通過水(shui)(shui)(shui)(shui)表(biao)(biao)的水(shui)(shui)(shui)(shui)總(zong)量。水(shui)(shui)(shui)(shui)平(ping)螺(luo)翼(yi)式(shi)水(shui)(shui)(shui)(shui)表(biao)(biao):水(shui)(shui)(shui)(shui)平(ping)螺(luo)翼(yi)式(shi)水(shui)(shui)(shui)(shui)表(biao)(biao)用(yong)(yong)(yong)于(yu)計量大(da)(da)流量管道的水(shui)(shui)(shui)(shui)流總(zong)量。特別適合于(yu)供水(shui)(shui)(shui)(shui)主(zhu)管道和大(da)(da)型(xing)廠礦(kuang)用(yong)(yong)(yong)水(shui)(shui)(shui)(shui)量的需要。主(zhu)要特點是流通能力大(da)(da)、體(ti)積(ji)小、結構緊湊、便于(yu)使用(yong)(yong)(yong)和維修(xiu)。規范(fan)規定,安裝(zhuang)螺(luo)翼(yi)式(shi)水(shui)(shui)(shui)(shui)表(biao)(biao),表(biao)(biao)前與(yu)(yu)冷門(men)應有不小于(yu)8倍(bei)水(shui)(shui)(shui)(shui)表(biao)(biao)接口直徑,最少為(wei)前5D后(hou)(hou)3D,要求直管長度(du)(du)的主(zhu)要目的是保(bao)證(zheng)水(shui)(shui)(shui)(shui)流的穩(wen)定,因為(wei)保(bao)證(zheng)水(shui)(shui)(shui)(shui)表(biao)(biao)精度(du)(du)的基礎是水(shui)(shui)(shui)(shui)流處于(yu)穩(wen)定的層(ceng)流狀態(tai)。
螺翼式水表和旋翼式水表的區別
旋(xuan)翼(yi)式(shi)(shi)(shi)(shi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao)和螺(luo)翼(yi)式(shi)(shi)(shi)(shi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao)均為機械水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao),是(shi)(shi)(shi)靠水(shui)(shui)(shui)(shui)(shui)(shui)(shui)流推動葉輪轉(zhuan)動來計(ji)量用(yong)(yong)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)量的(de)(de)。旋(xuan)翼(yi)式(shi)(shi)(shi)(shi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao)是(shi)(shi)(shi)指旋(xuan)轉(zhuan)軸(zhou)與(yu)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)流方向(xiang)垂(chui)直的(de)(de)轉(zhuan)子上(shang)安置有(you)(you)(you)若干(gan)片徑向(xiang)旋(xuan)轉(zhuan)翼(yi)的(de)(de)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao);螺(luo)翼(yi)式(shi)(shi)(shi)(shi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao)是(shi)(shi)(shi)指旋(xuan)轉(zhuan)軸(zhou)與(yu)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)流方向(xiang)平行(xing)的(de)(de)轉(zhuan)子上(shang)安置有(you)(you)(you)若干(gan)片螺(luo)旋(xuan)狀旋(xuan)轉(zhuan)翼(yi)的(de)(de)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao)。從定義上(shang)我們(men)(men)不難(nan)看(kan)出(chu),它們(men)(men)最(zui)大(da)(da)的(de)(de)區別是(shi)(shi)(shi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)流與(yu)轉(zhuan)軸(zhou)的(de)(de)垂(chui)直與(yu)平行(xing)。我們(men)(men)再看(kan)看(kan)它們(men)(men)的(de)(de)外(wai)觀有(you)(you)(you)何不同(tong),旋(xuan)翼(yi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao)看(kan)起(qi)來像(xiang)(xiang)一(yi)(yi)個(ge)“大(da)(da)肚子”水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao),螺(luo)翼(yi)式(shi)(shi)(shi)(shi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao)像(xiang)(xiang)一(yi)(yi)個(ge)字母“I”的(de)(de)形狀,“肚子”是(shi)(shi)(shi)平平的(de)(de)。所有(you)(you)(you)小口徑水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao)(DN15-40)都是(shi)(shi)(shi)旋(xuan)翼(yi)式(shi)(shi)(shi)(shi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao),高于DN50的(de)(de)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao)有(you)(you)(you)螺(luo)翼(yi)式(shi)(shi)(shi)(shi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao)也有(you)(you)(you)旋(xuan)翼(yi)式(shi)(shi)(shi)(shi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao)。最(zui)后我們(men)(men)從功能上(shang)它們(men)(men)有(you)(you)(you)什么不同(tong)之處,旋(xuan)翼(yi)式(shi)(shi)(shi)(shi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao)是(shi)(shi)(shi)市(shi)場上(shang)采用(yong)(yong)較(jiao)多的(de)(de)產(chan)品,尤其(qi)適合居民生(sheng)活(huo)用(yong)(yong)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)等水(shui)(shui)(shui)(shui)(shui)(shui)(shui)量變(bian)化較(jiao)大(da)(da)的(de)(de)場合,但(dan)是(shi)(shi)(shi)該系列水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao)有(you)(you)(you)其(qi)自身的(de)(de)優(you)點但(dan)也有(you)(you)(you)結構設(she)計(ji)缺陷,由于水(shui)(shui)(shui)(shui)(shui)(shui)(shui)流經過水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao)機芯時,容易造成壓力損失較(jiao)大(da)(da),流通能力降(jiang)低;螺(luo)翼(yi)式(shi)(shi)(shi)(shi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao)也是(shi)(shi)(shi)旋(xuan)渦式(shi)(shi)(shi)(shi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao),不僅可以較(jiao)好的(de)(de)克服(fu)大(da)(da)肚子表(biao)(biao)(biao)(biao)存在的(de)(de)這一(yi)(yi)缺陷,而(er)且始動流量低,耐磨性能更(geng)好,缺點是(shi)(shi)(shi)計(ji)量精準度不如(ru)旋(xuan)翼(yi)式(shi)(shi)(shi)(shi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)表(biao)(biao)(biao)(biao),更(geng)適合管道大(da)(da)的(de)(de)用(yong)(yong)表(biao)(biao)(biao)(biao)場所,如(ru)農田灌(guan)溉,總(zong)管道等。