簡介:千斤頂是鉗工劃線時所使(shi)用的支撐(cheng)工具,是用來支撐(cheng)毛(mao)坯或不規則工件進行(xing)劃線的工具,通常是三個一組使(shi)用。
千斤頂是鉗工(gong)劃線時所使(shi)用的(de)支(zhi)撐工(gong)具,是用來支(zhi)撐毛坯或不規則工(gong)件進行劃線的(de)工(gong)具,通常(chang)是三個一組(zu)使(shi)用。
千(qian)(qian)(qian)斤頂(ding)(ding)(ding)(ding)是一(yi)種(zhong)(zhong)用(yong)(yong)鋼性頂(ding)(ding)(ding)(ding)舉件作(zuo)為(wei)工作(zuo)裝(zhuang)置,通過頂(ding)(ding)(ding)(ding)部(bu)托(tuo)座(zuo)或底部(bu)托(tuo)爪在行程內頂(ding)(ding)(ding)(ding)升重物的(de)輕(qing)小起重設備。按(an)結(jie)構(gou)特征可分(fen)為(wei)齒條(tiao)千(qian)(qian)(qian)斤頂(ding)(ding)(ding)(ding)、螺旋千(qian)(qian)(qian)斤頂(ding)(ding)(ding)(ding)和(he)液(ye)壓千(qian)(qian)(qian)斤頂(ding)(ding)(ding)(ding)3種(zhong)(zhong)。千(qian)(qian)(qian)斤頂(ding)(ding)(ding)(ding)是一(yi)種(zhong)(zhong)起重高du小 (小于1m)的(de)簡單的(de)起重設備。它械式和(he)液(ye)壓式兩種(zhong)(zhong)。機(ji)械式千(qian)(qian)(qian)斤頂(ding)(ding)(ding)(ding)又(you)有(you)齒條(tiao)式與(yu)螺旋式兩種(zhong)(zhong),由于起重量小,操(cao)作(zuo)費力,一(yi)般只用(yong)(yong)于機(ji)械維(wei)修工作(zuo),在修橋過程中(zhong)不適用(yong)(yong)。液(ye)壓式千(qian)(qian)(qian)斤頂(ding)(ding)(ding)(ding)結(jie)構(gou)緊湊,工作(zuo)平穩,有(you)自鎖(suo)作(zuo)用(yong)(yong),故使(shi)用(yong)(yong)廣泛。
千斤頂工作原理(li):
千(qian)斤(jin)(jin)頂分為(wei)機械千(qian)斤(jin)(jin)頂和液壓(ya)千(qian)斤(jin)(jin)頂兩(liang)種(zhong),原(yuan)(yuan)理(li)各有不(bu)(bu)同(tong)(tong)。從原(yuan)(yuan)理(li)上(shang)來說(shuo),液壓(ya)千(qian)斤(jin)(jin)頂所基于(yu)的(de)(de)原(yuan)(yuan)理(li)為(wei)帕斯卡原(yuan)(yuan)理(li),即:液體各處的(de)(de)壓(ya)強(qiang)是一致的(de)(de),這(zhe)樣,在平(ping)衡的(de)(de)系統中(zhong),比(bi)(bi)較(jiao)小的(de)(de)活塞(sai)上(shang)面施加的(de)(de)壓(ya)力(li)比(bi)(bi)較(jiao)小,而(er)大的(de)(de)活塞(sai)上(shang)施加的(de)(de)壓(ya)力(li)也(ye)比(bi)(bi)較(jiao)大,這(zhe)樣能(neng)夠(gou)保(bao)持液體的(de)(de)靜止。所以(yi)(yi)通過液體的(de)(de)傳遞,可以(yi)(yi)得(de)到(dao)不(bu)(bu)同(tong)(tong)端上(shang)的(de)(de)不(bu)(bu)同(tong)(tong)的(de)(de)壓(ya)力(li),這(zhe)樣就可以(yi)(yi)達到(dao)一個(ge)變換(huan)的(de)(de)目的(de)(de)。我們所常見到(dao)的(de)(de)液壓(ya)千(qian)斤(jin)(jin)頂就是利用(yong)了這(zhe)個(ge)原(yuan)(yuan)理(li)來達到(dao)力(li)的(de)(de)傳遞。機械千(qian)斤(jin)(jin)頂采(cai)用(yong)機械原(yuan)(yuan)理(li),以(yi)(yi)往(wang)復扳動(dong)手柄,拔爪即推動(dong)棘輪間隙回轉,小傘(san)齒輪帶動(dong)大傘(san)齒輪、使舉重螺桿(gan)旋轉,從而(er)使升降套筒獲得(de)起升或下降,而(er)達到(dao)起重拉力(li)的(de)(de)功能(neng)。
千斤頂主要規格有:
規格mm | 高dumm | 外徑mm |
φ35×60 | 60 | 35 |
φ50×80 | 80 | 50 |
φ70×100 | 100 | 70 |
φ100×150 | 150 | 100 |
φ150×250 | 250 | 150 |
φ200×300 | 300 | 200 |
φ260×400 | 400 | 260 |
φ280×450 | 450 | 280 |
φ300×500 | 500 | 300 |
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