（一(yi)）、結構特點及功能

QZ系列球型(xing)支座(zuo)是由(you)上(shang)支座(zuo)板(ban)(ban)(ban)(ban)、下支座(zuo)板(ban)(ban)(ban)(ban)、凸形(xing)(xing)中間(jian)板(ban)(ban)(ban)(ban)及兩塊不同(tong)形(xing)(xing)狀的聚四(si)氟乙烯板(ban)(ban)(ban)(ban)組成。下支座(zuo)板(ban)(ban)(ban)(ban)中間(jian)為一凹(ao)形(xing)(xing)球面(mian)，同(tong)凸形(xing)(xing)中間(jian)包相對應，兩者之間(jian)有一弧(hu)形(xing)(xing)四(si)氟板(ban)(ban)(ban)(ban)，通過求(qiu)美棉與滑(hua)動(dong)來滿(man)足梁端(duan)的轉動(dong)；上(shang)座(zuo)板(ban)(ban)(ban)(ban)上(shang)的不銹(xiu)鋼板(ban)(ban)(ban)(ban)與中間(jian)鋼板(ban)(ban)(ban)(ban)上(shang)的另一四(si)氟板(ban)(ban)(ban)(ban)組成第二(er)滑(hua)動(dong)面(mian)，完成梁體因(yin)溫(wen)差諸多原因(yin)所產生(sheng)的伸縮(suo)位移。

QZ球(qiu)型支座(zuo)以傳力(li)可靠，各向(xiang)轉動性能(neng)一致(zhi) 轉動靈(ling)活的特(te)點，不(bu)僅具備(bei)盆式(shi)橡膠(jiao)支座(zuo)承載能(neng)力(li)大，水平位移(yi)大等特(te)點，而且能(neng)更好地適應大轉角的需(xu)要，適用(yong)(yong)于寬橋、曲線橋。由于承壓部(bu)件不(bu)使用(yong)(yong)橡膠(jiao)件，不(bu)存(cun)在橡膠(jiao)低溫脆(cui)性等影響，因此(ci)特(te)別適用(yong)(yong)于低溫地區(qu)。