宜昌醫(yī)院避雷針安裝廠家推薦咨詢湖北乾元上風(fēng)電氣供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="避雷針的保護(hù)范圍是多少？避雷針的工作原理就其本質(zhì)而言，避雷針不是避雷，而是利用其高聳空中的有利地來位，把雷電引向自身，承受雷擊。同時(shí)把雷電流泄入大地，起著保護(hù)其附源近比它矮的建筑物或設(shè)備免受雷擊的作用。簡(jiǎn)單一點(diǎn)說，一級(jí)保護(hù)是以30米為半徑、"><meta name="keywords" content="宜昌醫(yī)院避雷針安裝廠家,避雷針"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" 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href="http://www.cdcfah.com/cp/third-dgdq_kcdgdqcp/">庫(kù)存電工電氣產(chǎn)品</a>?宜昌醫(yī)院避雷針安裝廠家推薦咨詢湖北乾元上風(fēng)電氣供應(yīng)</p><div id="ec384xu" class="leftbox clearfix"><h1>宜昌醫(yī)院避雷針安裝廠家推薦咨詢湖北乾元上風(fēng)電氣供應(yīng)</h1><div id="8nrogar" class="proBig"><div id="s87c3dl" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/hbqysf/637232452424707031/2495206.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="qkzqnh7" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/hbqysf/637232452424707031/2495206.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="eikxub8" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>湖北省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>宜昌醫(yī)院避雷針安裝廠家,避雷針</p><p><span>***更新：</span>2021-01-19 03:07:05</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="ir2sxzg" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">湖北乾元上風(fēng)電氣工程有限公司</a></p><p><span>聯(lián)系人：</span>尹經(jīng)理</p><p><span>郵箱: </span></p><p><span>電話: </span>15671528728</p><p><span>傳真: </span>156_</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>156-71528728</p><p><span>地址: </span>武漢市江岸區(qū)金橋大道金橋壹號(hào)1203</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="8yqnpwn" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="3ias3jg" class="box"><p><h2> 避雷針的保護(hù)范圍是多少？ </h2> <p> <span style="display:none;"></span><span style="font-size:16px;">避雷針的工作原理就其本質(zhì)而言，避雷針不是避雷，而是利用其高聳空中的有利地來位，把雷電引向自身，承受雷擊。同時(shí)把雷電流泄入大地，起著保護(hù)其附源近比它矮的建筑物或設(shè)備免受雷擊的作用。簡(jiǎn)單一點(diǎn)說，一級(jí)保護(hù)是以30米為半徑、二級(jí)保護(hù)是45米為半百?gòu)健⑷?jí)保護(hù)是60米為半徑做弧的保護(hù)范圍。計(jì)算方法避雷針的保護(hù)半徑與高度（h）有關(guān)，宜昌醫(yī)院避雷針安裝廠家，以及與所現(xiàn)的滾球半徑有關(guān)， D為滾球半徑（度閃擊距離）類建筑物為D＝30米第二類建筑物為D＝45米第三類建筑物為D＝60米保護(hù)范圍采用規(guī)范之計(jì)算公式： Rx=?{h(2hr-h)}-?{hx(2hr-hx)} 其中Rx為避雷針在距離地問面hx米處的保護(hù)半徑（米）； hr為滾球半徑,根據(jù)建筑物類別取值30，宜昌醫(yī)院避雷針安裝廠家、45、60； hx為被保護(hù)物的高度一般來說，避雷針越高，保護(hù)范圍就越大，保護(hù)效果也越好，宜昌醫(yī)院避雷針安裝廠家，但考慮到避雷針建設(shè)的安全性和經(jīng)濟(jì)答性，避雷針大多建設(shè)在35米-45米之間。</span> 防雷避雷針安裝公司，湖北乾元上風(fēng)電氣供應(yīng)。宜昌醫(yī)院避雷針安裝廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="宜昌醫(yī)院避雷針安裝廠家,避雷針" src="https://tyunfile.71360.com/UploadFile/hbqysf/637232452424707031/2495206.jpg"></div><h2> 避雷針和避雷帶有什么區(qū)別？ </h2> <p> <span style="font-size:16px;"> ——★1避雷針是利用前列放電的原理，吸收雷電達(dá)到保護(hù)復(fù)作用。避雷針是保護(hù)某一片區(qū)域的，所以設(shè)置高度很高（具體高度，需要根據(jù)保護(hù)面積作復(fù)雜的計(jì)算），并且要有很高的強(qiáng)度要求，可以很好的吸收【直擊雷】的放電。 ——★2、建筑物避雷帶的避雷原理同避雷針相同，但是： ①、保護(hù)目的為建筑物自己，因此不制需要特別的高度等質(zhì)量要求； ②、一般的建筑物遭受直擊雷的可能性極低（高層建筑除外），主要防止【感應(yīng)雷】對(duì)建筑物的損害，一百般避雷帶足以滿足要求。 ——★3、直擊雷與感應(yīng)雷的區(qū)別： ①、直擊雷就是雷電直接與地面物體放電，釋放能量； ②、距離帶電云彩較近的建筑物，會(huì)度積聚與帶電云彩相反極性的、相同數(shù)量的電荷，當(dāng)帶電云彩突然失去電荷（如云彩之間放電），積聚在建筑物上的電荷就失去吸引力而四處泄放，這就是感應(yīng)雷。對(duì)于避雷針的材料，有很多種</span> 黃岡變電站避雷針廠家哪家好避雷針廠家，湖北乾元上風(fēng)電氣供應(yīng)，歡迎您來點(diǎn)電咨詢！</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="宜昌醫(yī)院避雷針安裝廠家,避雷針" src="https://tyunfile.71360.com/UploadFile/hbqysf/637232513372724610/4217025.jpg"></div><h2> 高樓大廈的避雷針用的什么材料？ </h2> <p> <span style="font-size:16px;">避雷針材料：宜采用圓鋼或焊接鋼管制成。避雷針注意事項(xiàng)： 1、所有金屬部件必須鍍鋅，操作時(shí)注意保護(hù)鍍鋅層。 2、采用鍍鋅鋼管管制作針尖，管壁厚度不得小于3mm,針尖刷錫長(zhǎng)度不得小于70mm 3、避雷針應(yīng)垂直安裝牢固。垂直度允許偏差為3/1000。 4、扁鋼為其寬度的2倍(且至少3個(gè)棱邊焊接)。 5、圓鋼為其直徑的6倍。 6、圓鋼與扁鋼連接時(shí)，其長(zhǎng)度為圓鋼直徑的6倍。 7、避雷針一般采用圓鋼或鋼管制成，其直徑不應(yīng)小于下列數(shù)值： **避雷針一般采用直徑為19mm鍍鋅圓鋼；屋面上的避雷針采用直徑25mm鍍鋅鋼管；水塔頂部避雷針采用直徑25mm或40mm的鍍鋅鋼管；囪頂上避雷針采用直徑25mm鍍鋅圓鋼或直徑為40mm鍍鋅鋼管e避雷環(huán)用直徑12mm鍍鋅圓鋼或截面為100mm2鍍鋅扁鋼，其厚度應(yīng)為4mm。</span> </p><h2> 避雷針的作用 </h2> <p> <span style="font-size:16px;">再也不怕打雷了防直擊雷裝置由接閃器、引下線和接地裝置三部分組成。接閃器就是通常所說的''避雷針''，它通過引下線和接地裝置與大地相連。由于''前列放電''效應(yīng)，大地被感應(yīng)出的電荷易聚集在針尖處，使得雷云與避雷針附近空間的電場(chǎng)強(qiáng)度相對(duì)較大，空氣也容易被擊穿，雷電流通過避雷針提供的放電通道泄放入地。這樣，雷擊雖然還是發(fā)生了，但總是擊向避雷針，而不是擊向要保護(hù)的物體，所以避雷針實(shí)際是引雷針。它將雷電吸引至自身，使雷電流通過引下線至接地裝置而泄放大地，從而使保護(hù)對(duì)象免遭雷擊。避雷針的保護(hù)范圍可用滾球法來確定。在一定范圍內(nèi)，隨著避雷針的增高，其保護(hù)范圍也隨之?dāng)U大，達(dá)到一定高度以后，其保護(hù)范圍就不再擴(kuò)大了。避雷針的高度是這樣確定的：對(duì)于類、第二類和第三類防雷建筑物，避雷針的有效高度分別為30米、45米和60米，所以盲目增加避雷針高度，既浪費(fèi)又無實(shí)際效果。</span> 防雷避雷針，湖北乾元上風(fēng)電氣供應(yīng)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="宜昌醫(yī)院避雷針安裝廠家,避雷針" src="https://tyunfile.71360.com/UploadFile/hbqysf/637232513374218750/1846083.jpg"></div><h2> 避雷針的覆蓋面積是多少 </h2> <p> <span style="font-size:16px;">據(jù)中國(guó)的規(guī)范規(guī)定，單支避雷針的保護(hù)范圍是一個(gè)錐體，高度為h的避雷針，其在地面上的保護(hù)半徑r=1.5h；在被保護(hù)物高度hx的水平面上，其保護(hù)半徑rx為：rx=(1.5h-2hx)P。 “折線法”是比較成熟的方法，在電力系統(tǒng)又稱“規(guī)程法”，即單支避雷針的保護(hù)范圍是一個(gè)以避雷針為軸的折線圓錐體。單支避雷針的保護(hù)范圍在DL/T620-997《交流電氣裝置的過電壓保護(hù)和絕緣配合》標(biāo)準(zhǔn)中有所規(guī)定；“滾球法”是國(guó)際電工會(huì)（IEC）推薦的接閃器保護(hù)范圍計(jì)算方法之一。我國(guó)建筑防雷規(guī)范GB50057-1994Z中也把“滾球法”強(qiáng)制作為計(jì)算避雷針保護(hù)范圍的方法。滾球法是以hR為半徑的一個(gè)球體沿需要防止擊雷的部位滾動(dòng)，當(dāng)球體只觸及接閃器（包括被用作接閃器的金屬物）或只觸及接閃器和地面（包括與大地接觸并能承受雷擊的金屬物），而不觸及需要保護(hù)的部位時(shí)，則該部分就得到接閃器的保護(hù)。</span> 防雷避雷針，湖北乾元上風(fēng)電氣供應(yīng)，品質(zhì)有保證！宜昌醫(yī)院避雷針安裝廠家</p><p style="text-indent:25px">防雷避雷針安裝公司，湖北乾元上風(fēng)電氣供應(yīng)，品質(zhì)有保證！宜昌醫(yī)院避雷針安裝廠家</p><h2> 避雷針是什么樣子？ </h2> <p> <span style="font-size:16px;">避雷針是保護(hù)建筑物等避免雷擊的裝置。在高大建筑物頂端安裝一個(gè)金屬棒，用金屬線與埋在地下的一塊金屬板連接起來，利用金屬棒的前列放電，使云層所帶的電和地上的電逐漸中和。唐代《炙轂子》一書在記載了這樣一件事：漢朝時(shí)柏梁殿遭到火災(zāi)，一位巫師建議，將一塊魚尾形狀的銅瓦放在層頂上，就可以主防止雷電所引起的天火。屋頂上所設(shè)置的魚尾開頭的瓦飾，實(shí)際上兼作避雷之用，可認(rèn)為是現(xiàn)代避雷針的雛形。而早在以前，中國(guó)已經(jīng)有了避雷針，一般以**為裝飾，龍嘴里有避雷針頭。法國(guó)旅行家卡勃里歐別·戴馬甘蘭1688年所著的《中國(guó)新事》一書中記有：中國(guó)屋脊兩頭，都有一個(gè)仰起的**，龍口吐出曲折的金屬舌頭，伸向天空，舌根連結(jié)一根細(xì)的鐵絲，直通地下。這種奇妙的裝置，在發(fā)生雷電的時(shí)刻就大顯神通，若雷電擊中了屋宇，電流就會(huì)從龍舌沿線睛行至地底，避免雷電擊毀建筑物。這說明，中國(guó)古代建筑上的如雷裝置，在大批量和結(jié)構(gòu)上已和現(xiàn)代避雷針基本相似。</span> 宜昌醫(yī)院避雷針安裝廠家</p><p style="text-indent:25px">湖北乾元上風(fēng)電氣工程有限公司致力于電工電氣，是一家貿(mào)易型的公司。公司業(yè)務(wù)分為武漢防雷檢測(cè)，變電站防雷接地，機(jī)房避雷針安裝，避雷針等，目前不斷進(jìn)行創(chuàng)新和服務(wù)改進(jìn)，為客戶提供良好的產(chǎn)品和服務(wù)。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠(chéng)信為本的理念，打造電工電氣良好品牌。湖北乾元上風(fēng)立足于全國(guó)市場(chǎng)，依托強(qiáng)大的研發(fā)實(shí)力，融合前沿的技術(shù)理念，飛快響應(yīng)客戶的變化需求。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2908389.html</p></div></div></div></div></div><div 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