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<p><strong>瀏覽量：</strong>1606</p> <p><strong>更新時間：</strong>2024-07-04</p> <p><strong>價格：</strong><a href="#order"><img src=/images/cankaojia.gif border=0></a></p> <a href="#tagContent1" class="gwc_an2 lightbox" style=" float:left;" rel="group1">在線留言</a> </div> <div class="quimsyk" id="preview"> <div id="quimsyk" class="jqzoom"><a target="_blank"><img id="bigImg" src="http://img53.chem17.com/gxhpic_3cd5e59743/340bc9cd6000b56fabda7935fa04431e76260bd6e416f6e505cc6ef5d28951ee646c66030e631f7e_320_320_5.png" onload="AutoResizeImage(320,320,this)" jqimg="http://img53.chem17.com/340bc9cd6000b56fabda7935fa04431e76260bd6e416f6e505cc6ef5d28951ee646c66030e631f7e.png" alt="DCVG直流電壓梯度檢測儀"></a></div> </div> </div>  <div class="quimsyk" id="ny_pro_box02"> <div class="quimsyk" id="con"> <ul id="tags"> <li id="quimsyk" class="selectTag"><a onmouseover="selectTag('tagContent0',this)" href="javascript:void(0)" onfocus="this.blur()">詳細介紹</a></li> </ul> <div class="quimsyk" id="tagContent"> <div id="quimsyk" class="tagContent selectTag" id="tagContent0" style="display: block;"><link type="text/css" rel="stylesheet" href="/css/property.css"> <script> window.onload=function(){ changeTableHeight(); } window.onresize=function(){ changeTableHeight(); } function changeTableHeight(){ $(".proshowParameter table th").each(function?(i,o){ ????var $this=$(o),? ????height=$this.next().height(); ????$(this).css("height",height); var obj = $(o); var val = obj.text(); if(val == '' || val == null || val == undefined){ $(this).addClass('none'); }else{ $(this).removeClass('none'); } }); $(".proshowParameter table td").each(function?(i,o){ var obj = $(o); var val = obj.text(); if(val == '' || val == null || val == undefined){ $(this).addClass('none'); }else{ $(this).removeClass('none'); } }); } </script> <section class="proshowParameter"> <table style=" margin-bottom:20px;"> <tbody> </tbody> </table> </section><p style="text-align:center"><img alt="" src="http://www.wnkj.net/images/image/20160511142297619761.jpg" style="margin:0px" /></p><p style="text-align:center"><span style="font-family:microsoft yahei; font-size:14px">DCVG直流電壓梯度檢測儀</span></p><p> </p><p><span style="color:rgb(51, 51, 51); font-family:microsoft yahei; font-size:14px">DCVG直流電壓梯度檢測儀</span><span style="color:rgb(51, 51, 51); font-family:microsoft yahei; font-size:14px">技術(shù)簡介 </span></p><p><span style="color:rgb(51, 51, 51); font-family:microsoft yahei; font-size:14px">陰極保護電流（CP）加載到管道上時，通過管道防腐層破損點和土壤構(gòu)成的電壓梯度，相應的就在管道上方的地面建立了地面電場分布。越接近破損點的部位，電壓梯度就越大，管道上方地面的電流密度就越大。一般來說，裸露面積越大，其附近的電流密度越大，地面的電壓梯度也就越大。</span></p><p><span style="color:rgb(51, 51, 51); font-family:microsoft yahei; font-size:14px"> DCVG測量方法</span></p><p><span style="color:rgb(51, 51, 51); font-family:microsoft yahei; font-size:14px">是在保護站的陰極保護儀上串接一個中斷器，使CP電流以一定的時間周期進行開/關(guān)，開/關(guān)時間通過GPS同步技術(shù)校正，確保與接收機同步。檢測時在管線的上方，通過測量地面上的電位梯度與土壤中的電流方向來確定缺陷的位置。接收機也帶有GPS同步系統(tǒng)，測量時一個電極探頭在管線正上方，另一個探頭在管道的一測，兩探頭相隔1米左右，沿管線的走向每間隔1米測量一組數(shù)據(jù)，根據(jù)測量結(jié)果可準確定位缺陷位置和級別。 </span></p><p> </p><p><span style="font-family:microsoft yahei"> DCVG的檢測特點</span><br /><span style="font-family:microsoft yahei"> DCVG在防腐層的定量檢測方面提供出完整的信息，配合CIPS檢測技術(shù)可在陰保系統(tǒng)有效性等方面對埋地管道進行腐蝕及防護全面檢測和評價：</span><br /><span style="font-family:microsoft yahei"> 防腐層缺陷的定位，評估破損嚴重程度</span><br /><span style="font-family:microsoft yahei"> 測量出防腐層缺陷位置的管道受保護程度</span><br /><span style="font-family:microsoft yahei"> ■ 根據(jù)地面電場反映出的陰保電流變化，鑒定缺陷的腐蝕活性</span><br /><span style="font-family:microsoft yahei"> ■ 識別并定位地下設(shè)施對陰保系統(tǒng)對檢測的干擾</span><br /><span style="font-family:microsoft yahei"> ■ 確定直流雜散電流在管道防腐層破損點部位的流入和流出點的位置</span><br /><span style="font-family:microsoft yahei"> ■ 定位陽極地床，評估陽極場效應的影響范圍</span><br /><span style="font-family:microsoft yahei"> ■ 通過DCVG 信號幅度的衰減趨勢分析，可以識別較大的防腐層破損處腐蝕狀況</span><br /><span style="font-family:microsoft yahei"> ■ 通過檢測防腐層缺陷的電流方向，確定是否調(diào)整陰保電流以保證所有缺陷得到充分的保護</span></p><p><span style="font-family:microsoft yahei"> 模擬式DCVG的主要優(yōu)勢</span><br /><span style="font-family:microsoft yahei"> ■ 管道防腐層破損處定位精度高（10厘米內(nèi)）</span><br /><span style="font-family:microsoft yahei"> ■ 檢測指示直觀、易于操作</span><br /><span style="font-family:microsoft yahei"> ■ 在DCVG檢測過程中，對能達到的管線區(qū)域進行細致的檢查</span><br /><span style="font-family:microsoft yahei"> ■ 能夠確定存在的直流雜散電流干擾，及破損處電流流入/出點</span><br /><span style="font-family:microsoft yahei"> ■ 能夠確定防腐層破損位置是否得到陰極保護</span><br /><span style="font-family:microsoft yahei"> ■ 確定大管道防腐層破損在管道環(huán)向的位置；</span><br /><span style="font-family:microsoft yahei"> ■ 開挖之前就可以判斷出防腐層破損的大概形狀</span><br /><span style="font-family:microsoft yahei"> ■ 的DCVG技術(shù)能夠檢測復雜管網(wǎng)及高壓線下的管線</span><br /><span style="font-family:microsoft yahei"> ■ 以確定是否要調(diào)整整流器的設(shè)置，使得防腐層破損處接收足夠陰保電流</span></p><p><span 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