（一）、結構特(te)點及功能

QZ系列球(qiu)型支座(zuo)是由上(shang)支座(zuo)板(ban)(ban)(ban)(ban)、下(xia)支座(zuo)板(ban)(ban)(ban)(ban)、凸形(xing)中間板(ban)(ban)(ban)(ban)及兩塊(kuai)不(bu)同形(xing)狀的(de)聚四氟(fu)乙烯板(ban)(ban)(ban)(ban)組成。下(xia)支座(zuo)板(ban)(ban)(ban)(ban)中間為一(yi)凹形(xing)球(qiu)面，同凸形(xing)中間包相對應，兩者之間有一(yi)弧形(xing)四氟(fu)板(ban)(ban)(ban)(ban)，通(tong)過求美棉與滑動(dong)(dong)來滿足梁端的(de)轉動(dong)(dong)；上(shang)座(zuo)板(ban)(ban)(ban)(ban)上(shang)的(de)不(bu)銹鋼(gang)板(ban)(ban)(ban)(ban)與中間鋼(gang)板(ban)(ban)(ban)(ban)上(shang)的(de)另一(yi)四氟(fu)板(ban)(ban)(ban)(ban)組成第二滑動(dong)(dong)面，完成梁體因溫差諸多原因所產生的(de)伸縮位移(yi)。

QZ球(qiu)型(xing)支座以傳力(li)可(ke)靠，各向(xiang)轉(zhuan)動(dong)性(xing)能一致 轉(zhuan)動(dong)靈活的特點(dian)，不(bu)僅(jin)具備(bei)盆式(shi)橡(xiang)(xiang)膠支座承載(zai)能力(li)大(da)，水平位移大(da)等特點(dian)，而(er)且能更(geng)好地適(shi)應大(da)轉(zhuan)角(jiao)的需(xu)要(yao)，適(shi)用(yong)(yong)于(yu)寬橋、曲線(xian)橋。由于(yu)承壓部件不(bu)使用(yong)(yong)橡(xiang)(xiang)膠件，不(bu)存在橡(xiang)(xiang)膠低溫(wen)脆性(xing)等影響，因(yin)此特別(bie)適(shi)用(yong)(yong)于(yu)低溫(wen)地區。