（一）、結構特點(dian)及(ji)功能

QZ系列球型支(zhi)座(zuo)是(shi)由上(shang)支(zhi)座(zuo)板(ban)(ban)(ban)(ban)、下(xia)支(zhi)座(zuo)板(ban)(ban)(ban)(ban)、凸形(xing)(xing)中間(jian)板(ban)(ban)(ban)(ban)及兩(liang)塊不(bu)同形(xing)(xing)狀的(de)聚四氟乙烯板(ban)(ban)(ban)(ban)組成(cheng)(cheng)。下(xia)支(zhi)座(zuo)板(ban)(ban)(ban)(ban)中間(jian)為一凹形(xing)(xing)球面，同凸形(xing)(xing)中間(jian)包相對應，兩(liang)者之間(jian)有一弧形(xing)(xing)四氟板(ban)(ban)(ban)(ban)，通過求美棉與滑(hua)動來滿足(zu)梁端的(de)轉動；上(shang)座(zuo)板(ban)(ban)(ban)(ban)上(shang)的(de)不(bu)銹鋼板(ban)(ban)(ban)(ban)與中間(jian)鋼板(ban)(ban)(ban)(ban)上(shang)的(de)另一四氟板(ban)(ban)(ban)(ban)組成(cheng)(cheng)第二滑(hua)動面，完(wan)成(cheng)(cheng)梁體因(yin)溫差諸多原(yuan)因(yin)所產生的(de)伸縮位(wei)移。

QZ球型支(zhi)(zhi)座(zuo)以傳力可靠，各向轉(zhuan)動(dong)性能(neng)(neng)一致 轉(zhuan)動(dong)靈活的(de)特點，不僅具備(bei)盆式橡膠(jiao)支(zhi)(zhi)座(zuo)承(cheng)載能(neng)(neng)力大(da)，水平位(wei)移大(da)等(deng)特點，而且能(neng)(neng)更好(hao)地適(shi)(shi)應大(da)轉(zhuan)角(jiao)的(de)需要(yao)，適(shi)(shi)用于寬橋(qiao)、曲(qu)線橋(qiao)。由于承(cheng)壓部件(jian)不使用橡膠(jiao)件(jian)，不存在橡膠(jiao)低溫脆(cui)性等(deng)影響(xiang)，因此特別(bie)適(shi)(shi)用于低溫地區。