（一）、結構特點及(ji)功能

QZ系列球型支(zhi)座(zuo)是由上支(zhi)座(zuo)板(ban)(ban)(ban)(ban)、下(xia)支(zhi)座(zuo)板(ban)(ban)(ban)(ban)、凸(tu)形(xing)中間(jian)板(ban)(ban)(ban)(ban)及(ji)兩塊不(bu)同形(xing)狀的(de)(de)聚四(si)氟乙烯板(ban)(ban)(ban)(ban)組(zu)成(cheng)。下(xia)支(zhi)座(zuo)板(ban)(ban)(ban)(ban)中間(jian)為一(yi)(yi)凹形(xing)球面，同凸(tu)形(xing)中間(jian)包相對應，兩者之間(jian)有(you)一(yi)(yi)弧形(xing)四(si)氟板(ban)(ban)(ban)(ban)，通過求美(mei)棉(mian)與滑(hua)(hua)動來(lai)滿足梁端的(de)(de)轉(zhuan)動；上座(zuo)板(ban)(ban)(ban)(ban)上的(de)(de)不(bu)銹鋼板(ban)(ban)(ban)(ban)與中間(jian)鋼板(ban)(ban)(ban)(ban)上的(de)(de)另一(yi)(yi)四(si)氟板(ban)(ban)(ban)(ban)組(zu)成(cheng)第二滑(hua)(hua)動面，完(wan)成(cheng)梁體因(yin)溫差諸多原(yuan)因(yin)所產生(sheng)的(de)(de)伸縮位移。

QZ球(qiu)型支座以傳(chuan)力可靠(kao)，各(ge)向(xiang)轉動(dong)性能一致 轉動(dong)靈活的特(te)點，不僅具備(bei)盆式(shi)橡(xiang)膠支座承載能力大(da)，水平位移(yi)大(da)等(deng)特(te)點，而且能更(geng)好地適(shi)應(ying)大(da)轉角的需要，適(shi)用(yong)(yong)于(yu)(yu)寬橋、曲線橋。由于(yu)(yu)承壓部件(jian)不使用(yong)(yong)橡(xiang)膠件(jian)，不存在橡(xiang)膠低溫脆性等(deng)影響，因(yin)此(ci)特(te)別適(shi)用(yong)(yong)于(yu)(yu)低溫地區。