本文主要探討管線傳輸系統運轉期間，由於緊鄰限流板（Orifice）之斜盤式止回閥之震動及噪音量偏高，而經拆檢發現閥體內部閥盤（Disc）的樞軸斷裂，並導致閥盤在閥體內滾動引起的震動及噪音。管線上斜盤式止回閥的樞軸斷裂後的殘料隨管線造成異物入侵損毀設備，脫落的閥盤阻斷水流等潛在危機是不容忽視的。又受限於現有空間，無法將限流板與下游的止回閥間之距離加大，為了確保管線系統的可靠度，穩定度及安全度，及提昇機組設備的安全，因此本文針對限流板下游管閥損壞原因進行探討。

The purpose of this article is to research on the vibration and noise caused by disc rolling in the valve body during operation period of pipe line transmission system. It was discovered when dismantlement the pivot pin of the disc in valve body was broken which result in vibration and high noise from the Tilting Check Valve adjacent to orifice. The remaining material produced from the broken pivot pin of Tilting Check Valve in pipe line became foreign objects which might damage the equipment and the detached disc which might block the water flow are all potential risks which should not be ignored. Strained by the existing space, it is not possible to extend the distance between orifice plate and downstream check valve. Therefore, to ensure the reliability, stability and safety of the pipe line system and to enhance the safety of the equipment, we intend to carry out research on the cause of the damage of orifice plate and downstream check valve.