青龍管業(002457.SZ)獲得1項實用新型專利證書
格隆匯1月12日丨青龍管業(002457.SZ)公佈,近日,公司收到中華人民共和國國家知識產權局頒發的實用新型專利證書。實用新型名稱:鋼筒型混凝土壓力管;專利申請日:2020年8月3日,授權公吿日:2020年12月29日;有效期:十年(自專利申請日起算)。
該實用新型涉及壓力輸水管道技術領域,尤其涉及一種鋼筒型混凝土壓力管。該鋼筒型混凝土壓力管,預應力鋼絲使鋼筒其處於大壓縮狀態而增大鋼筒的容許設計應力,從而一方面提高該鋼筒型混凝土壓力管承受內外壓的能力,另一方面減輕對於保護層和內襯層的不利影響。
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