金屬閥座防漏機構之設計

Abstract

閥座是球閥的一部份，當球閥關閉時，閥座必須達到密封的效果。閥座材料通常為橡膠等軟性材質，但當球閥應用在高溫、高壓的環境時，閥座容易損壞。本文的目的是依循工程設計法的流程，從規格訂定、概念設計、具體化設計到細部設計，設計出一新型的金屬閥座。並利用電腦輔助軟體模擬其在球閥中的狀況。最後製造出新型設計的原型閥座。

A seat is a device mounted in a valve. When a ball valve is in close position, the seat makes a sealing effect in a ball valve. The seat material is usually plastic or rubber, so the seat will be damaged under high pressure or high temperature environment. The objective of this study is to design a new seat mechanism suitable for the ball valve. Related U.S. patents are surveyed for references during the design process. To design a new metal seat, there are four steps, arranged in the engineering design process: planning and clarifying the task, conceptual design, embodiment design, and detailed design. Some useful tools from Quality Function Deployment (QFD) technique and Theory of Inventive Problem Solving (TRIZ) method are used in design process. The prototype model is complete by using CAD and CAE software. Finally, a new prototype of metal seat in a ball valve is manufactured.