詳細(xì)介紹
HEDLAND流量計(jì)量廣泛應(yīng)用于工農(nóng)業(yè)生產(chǎn)、國(guó)防建設(shè)、科學(xué)研究對(duì)外貿(mào)易以及人民生活各個(gè)領(lǐng)域之中。在石油工業(yè)生產(chǎn)中,從石油的開(kāi)采、運(yùn)輸、煉冶加工直至貿(mào)易,流量計(jì)量貫穿于全過(guò)程中,任何一個(gè)環(huán)節(jié)都離不開(kāi)流量計(jì)量,否則將無(wú)法保證石油工業(yè)的正常生產(chǎn)和貿(mào)易交往。在化工行業(yè),流量計(jì)量不準(zhǔn)確會(huì)造成化學(xué)成分分配比失調(diào),無(wú)法保證產(chǎn)品質(zhì)量,嚴(yán)重的還會(huì)發(fā)生生產(chǎn)安全事故。在電力工業(yè)生產(chǎn)中,對(duì)液體、氣體、蒸汽等介質(zhì)流量的測(cè)量和調(diào)節(jié)占有重要地位。流量計(jì)量的準(zhǔn)確與否不僅對(duì)保證發(fā)電廠(chǎng)在*參數(shù)下運(yùn)行具有很大的經(jīng)濟(jì)意義,而且隨著高溫高壓大容量機(jī)組的發(fā)展,流量測(cè)量已成為保證發(fā)電廠(chǎng)安全運(yùn)行的重要環(huán)節(jié)。如大容量鍋爐瞬時(shí)給水流量中斷或減少,都可能造成嚴(yán)重的干鍋或爆管事故。這就要求流量測(cè)量裝置不但應(yīng)做到準(zhǔn)確計(jì)量,而且要及時(shí)地發(fā)出報(bào)警信號(hào)。在鋼鐵工業(yè)生產(chǎn)中,煉鋼過(guò)程中循環(huán)水和氧氣(或空氣)的流量測(cè)量是保證產(chǎn)品質(zhì)量的重要參數(shù)之一。在輕工業(yè)、食品、紡織等行業(yè)中,也都離不開(kāi)流量計(jì)量。
H200A-002; H200A-005; H200A-010; H200A-020; H200B-002; H200B-005; H200B-010; H200B-020; H200S-002; H200S-005; H200S-010; H200S-020; H201A-002; H201A-005; H201A-010; H201A-020; H201B-002; H201B-005; H201B-010; H201B-020; H201S-002; H201S-005; H201S-010; H201S-020; H202A-002; H202A-005; H202A-010; H202A-020; H202B-002; H202B-005; H202B-010; H202B-020; H202S-002; H202S-005; H202S-010; H202S-020; H600A-001; H600A-001-RF; H600A-002; H600A-002-RF; H600A-005; H600A-005-RF; H600A-010; H600A-010-RF; H600A-015; H600A-015-RF; H600B-001; H600B-002; H600B-005; H600B-010; H600B-015; H600S-001; H600S-001-RF; H600S-002; H600S-002-RF; H600S-005; H600S-005-RF; H600S-010; HEDLAND流量計(jì)量應(yīng)用比較多的換能器是外夾式和插入式。單聲道超聲波流量計(jì)結(jié)構(gòu)簡(jiǎn)單、使用方便,但這種流量計(jì)對(duì)流態(tài)分布變化適應(yīng)性差,微電子技術(shù)和計(jì)算機(jī)技術(shù)的飛躍發(fā)展極大地推動(dòng)儀表更新?lián)Q代,新型流量計(jì)如雨后春筍般涌現(xiàn)出來(lái)。至今,據(jù)稱(chēng)已有上百種流量計(jì)投向市場(chǎng),現(xiàn)場(chǎng)使用中許多棘手的難題可望獲得解決。我國(guó)開(kāi)展近代流量測(cè)量技術(shù)的工作比較晚,被設(shè)置在測(cè)量流動(dòng)通道6的上游端并相對(duì)于孔眼11和12,用于減少被測(cè)量的流體流入孔眼11和12;測(cè)量控制部件19,用于測(cè)量超聲波換能器8和9之間的超聲波的傳播時(shí)間;及計(jì)算部件20,用于根據(jù)該測(cè)量控制部件19的信號(hào)計(jì)算流量。
H600S-010-RF; H600S-015; H600S-015-RF; H601A-001; H601A-001-RF; H601A-002; H601A-002-RF; H601A-005; H601A-005-RF; H601A-010; H601A-010-RF; H601A-015; H601A-015-RF; H601B-001; H601B-002; H601B-005; H601B-010; H601B-015; H601S-001; H601S-001-RF; H601S-002; H601S-002-RF; H601S-005; H601S-005-RF; H601S-010; H601S-010-RF; H601S-015; H601S-015-RF; H602A-001; H602A-001-RF; H602A-002; H602A-002-RF; H602A-005; H602A-005-RF; H602A-010; H602A-010-RF; H602A-015; H602A-015-RF; H602B-001; H602B-002; H602B-005; H602B-010; H602B-015; H602S-001; H602S-001-RF; H602S-002; H602S-002-RF; H602S-005; H602S-005-RF; H602S-010; H602S-010-RF; H602S-015; H602S-015-RF; H700A-002; H700A-002-RF; H700A-005; H700A-005-RF; H700A-010; H700A-010-RF; H700A-020; H700A-020-RF; H700A-030; H700A-030-RF; H700B-002; H700B-005; H700B-010; H700B-020; H700B-030; H700S-002; H700S-002-RF; H700S-005; H700S-005-RF; H700S-010; H700S-010-RF; H700S-020; H700S-020-RF; H700S-030; H700S-030-RF; H701A-002; H701A-002-RF; H701A-005; H701A-005-RF; H701A-010; H701A-010-RF; H701A-020; H701A-020-RF; H701A-030; H701A-030-RF;H701B-002; 美國(guó)HEDLAND流量計(jì)盡量避開(kāi)鐵磁性物體及具有強(qiáng)電磁場(chǎng)的設(shè)備(如大電機(jī)、大變壓器的等),以免磁場(chǎng)影響傳感器的工作磁場(chǎng)和流量信號(hào)。傳感器勺轉(zhuǎn)換器間的流量信號(hào)線(xiàn)和激磁線(xiàn)。然而從雷電故障中損壞零部件的分析,引起故障的感應(yīng)高電壓和浪涌電流大部分足從控制室電源線(xiàn)路引入的,其他兩條途徑較少。由于電磁流量計(jì)測(cè)量含有懸浮固相或污臟體的機(jī)會(huì)遠(yuǎn)比其他流量?jī)x表多,出現(xiàn)內(nèi)壁附著層產(chǎn)生的故障概率也就相對(duì)較高。若附著層電導(dǎo)率與液體電導(dǎo)率相近。常見(jiàn)的調(diào)試期故障通常由安裝不妥。H701B-005; H701B-010; H701B-020; H701B-030; H701S-002; H701S-002-RF; H701S-005; H701S-005-RF; H701S-010; H701S-010-RF; H701S-020; H701S-020-RF; H701S-030; H701S-030-RF; H702A-002; H702A-002-RF; H702A-005; H702A-005-RF; H702A-010; H702A-010-RF; H702A-020; H702A-020-RF; H702A-030; H702A-030-RF; H702B-002; H702B-005; H702B-010; H702B-020; H702B-030; H702S-002; H702S-002-RF; H702S-005; H702S-005-RF; H702S-010; H702S-010-RF; H702S-020; H702S-020-RF; H702S-030; H702S-030-RF; H760A-002; H760A-002-RF; H760A-005; H760A-005-RF; H760A-010; H760A-010-RF; H760A-020; H760A-020-RF; H760A-030; H760A-030-RF; H760A-040; H760A-040-RF; H760A-050; H760A-050-RF; H760B-002; H760B-005; H760B-010; H760B-020; H760B-030; H760B-040; H760B-050; H760S-002; H760S-002-RF; H760S-005; H760S-005-RF; H760S-010; H760S-010-RF; H760S-020; H760S-020-RF; H760S-030; H760S-030-RF; H760S-040; H760S-040-RF; H760S-050; H760S-050-RF; H761A-002; H761A-002-RF; H761A-005; H761A-005-RF; H761A-010; H761A-010-RF; H761A-020; H761A-020-RF; H761A-030; H761A-030-RF; H761A-040; H761A-040-RF; H761A-050; H761A-050-RF; H761B-002; H761B-005; H761B-010; H761B-020; H761B-030; H761B-040; H761B-050; H761S-002; H761S-002-RF; H761S-005; H761S-005-RF; H761S-010; H761S-010-RF; H761S-020; H761S-020-RF; H761S-030; H761S-030-RF; H761S-040; H761S-040-RF; H761S-050; H761S-050-RF; H762A-002;H762A-002-RF; H762A-005; H762A-005-RF; H762A-010; H762A-010-RF; H762A-020; H762A-020-RF; H762A-030; H762A-030-RF; H762A-040; H762A-040-RF; H762A-050; H762A-050-RF; H762B-002; H762B-005; H762B-010; H762B-020; H762B-030; H762B-040; H762B-050; H762S-002; H762S-002-RF; H762S-005; H762S-005-RF; H762S-010; H762S-010-RF; H762S-020; H762S-020-RF; H762S-030; 上海HEDLAND 流量計(jì)英文名稱(chēng)是flowmeter,全國(guó)科學(xué)技術(shù)名詞審定委員會(huì)把它定義為:指示被測(cè)流量和(或)在選定的時(shí)間間隔內(nèi)流體總量的儀表。簡(jiǎn)單來(lái)說(shuō)就是用于測(cè)量管道或明渠中流體流量的一種儀表,工程上常用單位m3/h,它可分為瞬時(shí)流量(Flow Rate)和累計(jì)流量(Total Flow),瞬時(shí)流量即單位時(shí)間內(nèi)過(guò)封閉管道或明渠有效截面的量,流過(guò)的物質(zhì)可以是氣體、液體、固體;累計(jì)流量即為在某一段時(shí)間間隔內(nèi)(一天、一周、一月、一年)流體流過(guò)封閉管道或明渠有效截面的累計(jì)量。通過(guò)瞬時(shí)流量對(duì)時(shí)間積分亦可求得累計(jì)流量,所以瞬時(shí)流量計(jì)和累計(jì)流量計(jì)之間也是可以相互轉(zhuǎn)化的。
H762S-030-RF; H762S-040; H762S-040-RF; H762S-050; H762S-050-RF;H800A-030; H800A-030-RF; H800A-050; H800A-050-RF; H800A-075; H800A-075-RF; H800A-100; H800A-100-RF; H800A-150; H800A-150-RF; H800B-030; H800B-050; H800B-075; H800B-100; H800B-150; H800S-030; H800S-030-RF; H800S-050; H800S-050-RF; H800S-075; H800S-075-RF; H800S-100; H800S-100-RF; H800S-150; H800S-150-RF; H801A-030; H801A-030-RF; H801A-050*; H801A-050-RF; H801A-075; H801A-075-RF; H801A-100; H801A-100-RF; H801A-150; H801A-150-RF; H801B-030; H802S-075-RF; H802S-100; H802S-100-RF; H802S-150; H802S-150-RF; H808A-030; H808A-030-RF; H808A-050; H808A-050-RF; H808A-075; H808A-075-RF; H808A-100; H808A-100-RF; H808A-150; H808A-150-RF; H808B-030; H808B-050; H808B-075; H808B-100; H808B-150; H808S-030; H808S-030-RF; H808S-050; H808S-050-RF; H808S-075; H808S-075-RF; H808S-100; H808S-100-RF; H808S-150; H808S-150-RF; H860A-030; H860A-030-RF; H860A-050; H860A-050-RF; hedland流量計(jì)測(cè)量管道或明溝中液體、氣體或蒸汽等流體流量的工業(yè)自動(dòng)化儀表,又稱(chēng)流量計(jì)。流量是指單位時(shí)間內(nèi)流經(jīng)管道有效截面的流體數(shù)量。流體數(shù)量用體積表示者稱(chēng)為體積流量,單位為米3/時(shí)、升/時(shí)等;流體數(shù)量用質(zhì)量表示者稱(chēng)為質(zhì)量流量,單位為噸/時(shí)、千克/時(shí)等。