升降機是建築工程垂直運輸不可缺少的施工設備。jinnianlaishigongshengjiangjideexingshigushiyoufasheng,jiuqigenbenyuanyin,guanlicuoshibubudaowei,quefakexuexing,shizaochengshigongshengjiangjishiguyinhuandegenbenyuanyin。zheliyiSC型施工升降機為例,提出幾個需要重視的問題。
1、防墜安全器
防墜安全器是shi施shi工gong升sheng降jiang機ji上shang重zhong要yao的de一yi個ge部bu件jian,要yao依yi靠kao它ta來lai消xiao除chu吊diao籠long墜zhui落luo事shi故gu的de發fa生sheng,保bao證zheng乘cheng員yuan的de生sheng命ming安an全quan。因yin此ci防fang墜zhui安an全quan器qi出chu廠chang試shi驗yan非fei常chang嚴yan格ge的de,出chu廠chang前qian由you法fa定ding的de檢jian驗yan單dan位wei對dui它ta進jin行xing轉zhuan矩ju的de測ce量liang,臨lin界jie轉zhuan速su時shi測ce量liang,彈dan簧huang壓ya縮suo量liang的de測ce量liang,每mei台tai都dou附fu有you測ce試shi報bao告gao,組zu裝zhuang到dao施shi工gong升sheng降jiang機ji上shang後hou進jin行xing額e定ding載zai荷he下xia的de墜zhui落luo試shi驗yan,而er工gong地di上shang使shi用yong中zhong的de升sheng降jiang機ji都dou必bi須xu每mei三san個ge月yue就jiu要yao進jin行xing一yi次ci墜zhui落luo試shi驗yan。對dui出chu廠chang兩liang年nian的de防fang墜zhui安an全quan器qi(防墜安全器上出廠日期),還hai必bi須xu送song到dao法fa定ding的de檢jian驗yan單dan位wei進jin行xing檢jian測ce試shi驗yan,以yi後hou每mei年nian檢jian測ce一yi次ci。到dao目mu前qian為wei止zhi很hen少shao有you人ren送song檢jian,有you些xie工gong地di甚shen至zhi連lian每mei三san個ge月yue檢jian測ce一yi次ci墜zhui落luo試shi驗yan都dou不bu做zuo,都dou認ren為wei自zi己ji的de防fang墜zhui安an全quan器qi沒mei有you問wen題ti,可ke是shi一yi旦dan出chu了le事shi故gu就jiu後hou悔hui莫mo及ji。為wei什shen麼me不bu按an製zhi度du定ding期qi試shi驗yan和he送song檢jian呢ne?使shi用yong單dan位wei盲mang目mu認ren為wei不bu壞huai就jiu算suan好hao。實shi際ji上shang防fang墜zhui安an全quan器qi好hao壞huai隻zhi能neng通tong過guo試shi驗yan和he送song檢jian才cai能neng判pan斷duan好hao壞huai,日ri常chang運yun行xing中zhong是shi無wu法fa確que定ding其qi是shi否fou好hao壞huai的de,對dui那na些xie超chao期qi服fu役yi的de防fang墜zhui安an全quan器qi,建jian議yi還hai是shi早zao些xie送song檢jian和he定ding期qi試shi驗yan為wei好hao,隻zhi有you做zuo到dao心xin中zhong有you數shu,才cai能neng將jiang惡e性xing事shi故gu防fang患huan於yu未wei然ran。
2、安全開關
升降機的安全開關都是根據安全需要設計的,有圍欄門限位、吊籠門限位、頂門限位、極限位開關、上下限位開關、對(dui)重(zhong)防(fang)斷(duan)繩(sheng)保(bao)護(hu)開(kai)關(guan)等(deng)。一(yi)些(xie)工(gong)地(di)上(shang)為(wei)了(le)省(sheng)事(shi)將(jiang)一(yi)些(xie)限(xian)位(wei)開(kai)關(guan)人(ren)為(wei)取(qu)消(xiao)和(he)短(duan)接(jie)或(huo)損(sun)壞(huai)後(hou)不(bu)及(ji)時(shi)修(xiu)複(fu),就(jiu)等(deng)於(yu)取(qu)消(xiao)了(le)這(zhe)幾(ji)道(dao)安(an)全(quan)防(fang)線(xian),種(zhong)下(xia)了(le)事(shi)故(gu)隱(yin)患(huan)。例(li):diaolongyaozhuangzaichangdongxi,diaolongneifangbuxiaxushenchudiaolongwai,errenweiquxiaomenxianweihuodingmenxianwei,zaishangshuanquansheshibuwanshanhuobuwanhaodeqingkuangxia,zhaoyangzairenzaiwu,zhezhongweizhangzuoyeshinarenshengmingkaiwanxiaode,weilebimianshiguyinhuandefasheng,xiwangshiyongdanweilingdaojiaqiangguanli,yangeyaoqiushengjiangjiweihuhecaozuorenyuandingqijianzhagezhonganquankaiguandeanquankekaoxing,dujueshigudefasheng。
3、齒輪、齒條的磨損更換
工地上的施工,作業環境條件惡劣,水泥、砂漿、塵(chen)土(tu)不(bu)可(ke)能(neng)消(xiao)除(chu)幹(gan)淨(jing),齒(chi)輪(lun)與(yu)齒(chi)條(tiao)的(de)相(xiang)互(hu)研(yan)磨(mo),齒(chi)都(dou)磨(mo)尖(jian)了(le)仍(reng)然(ran)還(hai)在(zai)使(shi)用(yong),應(ying)當(dang)引(yin)起(qi)重(zhong)視(shi)。眾(zhong)所(suo)周(zhou)知(zhi),齒(chi)形(xing)應(ying)如(ru)同(tong)一(yi)個(ge)懸(xuan)臂(bi)梁(liang),當(dang)磨(mo)損(sun)到(dao)一(yi)定(ding)尺(chi)寸(cun)時(shi),必(bi)須(xu)更(geng)換(huan)齒(chi)輪(lun)(或齒條)。磨損到什麼程度就要停止使用更換新的呢?可以采用25-50mm公法線千分尺進行測量,當齒輪的公法線長度由37.1mm磨損到小於35.1mm尺寸時(2個齒)就必須要更換新齒輪。當齒條磨損後,由齒厚卡尺測量,弦高為8mm時齒厚從12.56mm磨損到小於10.6mm時,齒條一定要更換了,然而工地上很多"老掉牙"的齒輪、齒條的升降機仍然在超期服役使用,為了安全起見,必須更換新配件。
4、暫載率的定義
工地上的升降機頻繁作業,利用率高,但不得不考慮電機的間斷工作製問題,也就是常說的暫載率的問題(有時叫負載持續率)它的定義是FC=工作周期時間/負載時間×100%,其中工作周期時間為負載時間和停機時間。有的工地上升降機是租賃公司租來的,總想充分利用,而電機的的暫載率(FC=40%或25%)就(jiu)完(wan)全(quan)不(bu)顧(gu),電(dian)機(ji)怎(zen)麼(me)不(bu)發(fa)熱(re)呢(ne)?有(you)的(de)甚(shen)至(zhi)於(yu)冒(mao)出(chu)焦(jiao)糊(hu)味(wei)還(hai)在(zai)使(shi)用(yong),這(zhe)是(shi)很(hen)不(bu)正(zheng)常(chang)的(de)操(cao)作(zuo)使(shi)用(yong)。如(ru)果(guo)傳(chuan)動(dong)係(xi)統(tong)潤(run)滑(hua)不(bu)良(liang)或(huo)運(yun)行(xing)阻(zu)力(li)過(guo)大(da),超(chao)載(zai)使(shi)用(yong),或(huo)作(zuo)頻(pin)繁(fan)的(de)啟(qi)動(dong),那(na)就(jiu)更(geng)是(shi)小(xiao)馬(ma)拉(la)大(da)車(che)了(le)。因(yin)此(ci)工(gong)地(di)上(shang)的(de)每(mei)個(ge)司(si)機(ji)都(dou)必(bi)須(xu)明(ming)白(bai)暫(zan)載(zai)率(lv)的(de)概(gai)念(nian),按(an)科(ke)學(xue)規(gui)律(lv)辦(ban)事(shi),這(zhe)種(zhong)電(dian)機(ji)本(ben)身(shen)就(jiu)是(shi)按(an)間(jian)斷(duan)作(zuo)業(ye)設(she)計(ji)的(de)。
5、緩衝器
shigongshengjiangjishangdehuanchongqideshigongshengjiangjianquandezuihouyidaofangxian,diyi,tabixushezhi,dier,tabixuyouyidingdeqiangdu,nengchengshoushengjiangjiedingzaihedechongji,qieqidaohuanchongdezuoyong。erxianzaihenduogongdi,youdesuiyoushezhi,danbuzuyiqidaohuanchongdezuoyong,youdigongdishangjiuwanquanmeiyouhuanchongqi,zheshijiduancuowude,xiwangshiyongdanweizhuyijinxingjianzha,buyaoqingshizhezuihouyidaofangxian。
6、樓層停靠安全防護門
施(shi)工(gong)升(sheng)降(jiang)機(ji)各(ge)停(ting)靠(kao)層(ceng)應(ying)設(she)置(zhi)停(ting)靠(kao)安(an)全(quan)防(fang)護(hu)門(men)。很(hen)明(ming)顯(xian)如(ru)果(guo)不(bu)按(an)要(yao)求(qiu)設(she)置(zhi),在(zai)高(gao)處(chu)等(deng)候(hou)的(de)施(shi)工(gong)人(ren)員(yuan)很(hen)容(rong)易(yi)發(fa)生(sheng)意(yi)外(wai)墜(zhui)落(luo)事(shi)故(gu)。在(zai)設(she)置(zhi)停(ting)靠(kao)安(an)全(quan)防(fang)護(hu)門(men)時(shi),應(ying)保(bao)證(zheng)安(an)全(quan)防(fang)護(hu)門(men)的(de)高(gao)度(du)不(bu)小(xiao)於(yu)1.8m,且qie層ceng門men應ying有you聯lian鎖suo裝zhuang置zhi,在zai吊diao籠long未wei到dao停ting層ceng位wei置zhi,防fang護hu門men無wu法fa打da開kai,保bao證zheng作zuo業ye人ren員yuan安an全quan。而er目mu前qian工gong地di上shang普pu遍bian存cun在zai著zhe等deng候hou施shi工gong電dian梯ti的de人ren員yuan隨sui時shi可ke以yi打da開kai安an全quan防fang護hu門men,這zhe是shi十shi分fen危wei險xian的de,應ying引yin起qi重zhong視shi。
7、基礎圍欄
根據GB10055之規定"基(ji)礎(chu)圍(wei)欄(lan)應(ying)裝(zhuang)有(you)機(ji)械(xie)聯(lian)鎖(suo)或(huo)電(dian)氣(qi)聯(lian)鎖(suo),機(ji)構(gou)聯(lian)鎖(suo)應(ying)使(shi)吊(diao)籠(long)隻(zhi)能(neng)位(wei)於(yu)底(di)部(bu)所(suo)規(gui)定(ding)的(de)位(wei)置(zhi)時(shi),基(ji)礎(chu)圍(wei)欄(lan)門(men)才(cai)能(neng)開(kai)啟(qi),電(dian)氣(qi)聯(lian)鎖(suo)應(ying)使(shi)防(fang)護(hu)圍(wei)欄(lan)開(kai)啟(qi)後(hou)吊(diao)籠(long)停(ting)車(che)且(qie)不(bu)能(neng)起(qi)動(dong)"。有(you)相(xiang)當(dang)多(duo)施(shi)工(gong)升(sheng)降(jiang)機(ji),在(zai)吊(diao)籠(long)接(jie)近(jin)圍(wei)欄(lan)門(men)時(shi),吊(diao)籠(long)底(di)部(bu)壓(ya)住(zhu)一(yi)根(gen)橫(heng)梁(liang)向(xiang)下(xia)運(yun)行(xing),通(tong)過(guo)換(huan)向(xiang)滑(hua)輪(lun)鋼(gang)絲(si)繩(sheng)帶(dai)動(dong)圍(wei)欄(lan)門(men)向(xiang)上(shang)開(kai)啟(qi),這(zhe)是(shi)不(bu)允(yun)許(xu)的(de),很(hen)容(rong)易(yi)給(gei)圍(wei)欄(lan)外(wai)附(fu)近(jin)的(de)人(ren)造(zao)成(cheng)傷(shang)害(hai)。
8、吊籠頂部控製盒
GB10055之規定"吊籠頂部應設有檢修或拆裝時使用的控製盒,並具有在多種速度的情況下隻允許以不高於0.65m/sdesuduyunxing。zaishiyongdiaolongdingbukongzhiheshi,qitacaozuozhuangzhijunqibudaozuoyong。cishidiaolongdeanquanzhuangzhirengqibaohuzuoyong。diaolongdingbukongzhiyingcaiyonghengdingyalianniuhuoshuangwentaikaiguanjinxingcaozuo,diaolongdingbuyinganzhuangfeizixingfuweijitingkaiguan,renheshihoujunkeqieduandianlu,tingzhidiaolongdedongzuo"。這一條主要針對SC型施工升降機,很少企業的產品能同時滿足該條的五項規定:包括一些有名的設計單位設計的產品。不滿足這五項規定,有什麼壞處呢?有可能由於安裝、維wei護hu人ren員yuan的de誤wu操cao作zuo,而er造zao成cheng安an全quan事shi故gu。希xi望wang有you關guan使shi用yong單dan位wei對dui施shi工gong升sheng降jiang機ji進jin行xing對dui照zhao檢jian查zha,尤you其qi是shi老lao產chan品pin,如ru不bu符fu合he上shang述shu規gui定ding的de應ying積ji極ji采cai取qu措cuo施shi進jin行xing改gai造zao。
9、過壓、欠壓、錯斷相保護
過壓、欠壓、錯斷相保護裝置是在當出現電壓降、過電壓、dianqixianluchuxiancuoxiangheduanxiangguzhangshi,baohuzhuangzhidongzuo,shigongshengjiangjitingzhiyunxing。youxiegongdishangshigongshengjiangjiweixiurenyuan,bujishipaichuyinqiguoqianyacuoduanxiangbaohuzhuangzhidongzuodeguzhang,ershibabaohuzhuangzhiquxiaohuoduanjie,shiqibuqizuoyong,geishebeiliuxiashiguyinhuan,youyixiezaoqichanpingenbenmeiyougaibaohuzhuangzhi,jianyiyingyuyipeibei。shigongshengjiangjiyingzaiguoqianya、錯斷相保護裝置可靠有效的情況下方可載人運物。
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