（一）、結構特點及(ji)功能

QZ系列球型支(zhi)(zhi)座(zuo)(zuo)是由上(shang)(shang)(shang)支(zhi)(zhi)座(zuo)(zuo)板(ban)(ban)(ban)、下支(zhi)(zhi)座(zuo)(zuo)板(ban)(ban)(ban)、凸形(xing)中(zhong)間板(ban)(ban)(ban)及(ji)兩(liang)塊(kuai)不同(tong)形(xing)狀的(de)(de)聚四氟乙烯板(ban)(ban)(ban)組成(cheng)。下支(zhi)(zhi)座(zuo)(zuo)板(ban)(ban)(ban)中(zhong)間為一凹形(xing)球面，同(tong)凸形(xing)中(zhong)間包相對應，兩(liang)者之間有一弧形(xing)四氟板(ban)(ban)(ban)，通過求美棉與滑動來滿足梁端的(de)(de)轉動；上(shang)(shang)(shang)座(zuo)(zuo)板(ban)(ban)(ban)上(shang)(shang)(shang)的(de)(de)不銹鋼板(ban)(ban)(ban)與中(zhong)間鋼板(ban)(ban)(ban)上(shang)(shang)(shang)的(de)(de)另一四氟板(ban)(ban)(ban)組成(cheng)第二滑動面，完成(cheng)梁體因(yin)溫(wen)差諸多原因(yin)所產生的(de)(de)伸縮位移。

QZ球型支(zhi)座(zuo)以傳力可靠，各(ge)向(xiang)轉(zhuan)動性(xing)能(neng)一致(zhi) 轉(zhuan)動靈活的特點，不(bu)僅具備盆式橡膠支(zhi)座(zuo)承載能(neng)力大，水平位移大等(deng)特點，而且能(neng)更好(hao)地適應大轉(zhuan)角的需(xu)要，適用于寬橋、曲線橋。由(you)于承壓部件(jian)不(bu)使(shi)用橡膠件(jian)，不(bu)存(cun)在橡膠低溫(wen)脆性(xing)等(deng)影(ying)響，因此特別(bie)適用于低溫(wen)地區。