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安全閥的工作原理和操作規范

發布時間:2017-11-07 14:51:53   發布人:http://www.aiqin1.cn
安全閥是鍋爐、壓力容器.壓力管道等承壓設備保護裝置。安全閥的工作原理和操作規范了解很重要。在上海高壓閥門看來:安全閥是直接依靠介質壓力產生的作用力來克服作用在閥瓣上的機械載荷使安全閥開啟的,作用在閥瓣上的機械載荷主要來自重錘或彈簧,這種幾乎是固定的機械載荷。要想保證安全閥的密封性能,必須閥座密封面和閥瓣密封面的平整度和表面粗糙度有嚴格的要求。
Safety valve is boiler, pressure vessel, pressure pipe and other pressure equipment protection device. It is very important to understand the working principle and operation specification of safety valve. In the view of Shanghai high pressure valve: safety valve is the direct force produced by the medium pressure to overcome the mechanical load on the valve flap to open the safety valve, the mechanical load on the valve flap mainly from weight or spring, which is almost constant mechanical load. In order to ensure the sealing performance of the safety valve, the valve seat sealing surface and the valve seal surface smoothness and surface roughness must be strictly required.

安全閥的工作原理:
Working principle of safety valve:
以彈簧式安全閥為例:工作原理是壓力=壓強X面積。壓力就是彈簧的壓力,面積就是密封面的面積。當作用在密封面上的壓強乘以密封面的面積形成的向上的推力大于彈簧的壓力,彈簧被壓縮,密封面打開,將壓力通過泄壓孔排出。
Take the spring safety valve as an example: the working principle is the pressure = pressure X area. Pressure is the pressure of spring, the area is the area of the sealing surface. When the pressure acting on the sealing surface is multiplied by the area of the sealing surface, the upward thrust is greater than the pressure of the spring, the spring is compressed, the sealing surface is opened, and the pressure is discharged through the pressure relief hole.
當設備內的壓力超過規定的工作壓力并達到安全閥的開啟壓力時,內部介質作用于鬧瓣上面的力大于加載機構施加在它上面的力,于是  閥瓣離開閥座,安全閥開啟,設備內的介質即通過閥座排出。此時內壓作用于閥瓣上面的力又小于加載機構施加在它上面的力,閥瓣又緊壓著閥座,介質停止排出,設備保持正常的工作壓力繼續運行。所以,安全閥是通過閥瓣上介質作用力與加載機構作用力的消長,自行關閉或開啟以達到防止設備超壓的目的。
When the equipment inside the pressure exceeds the pressure of work and achieve the safety valve opening pressure, the internal medium acting on the flap above downtown the force is greater than the loading mechanism applied on top of it, then leave the seat valve, safety valve opens, equipment in the medium is discharged through the valve seat. The force acting on the valve clack is less than the force exerted on it by the loading mechanism, and the valve tightly presses the valve seat, the medium stops discharging, and the equipment keeps the normal working pressure and continues to run. Therefore, the safety valve is through the valve on the medium force and the force of the loading and unloading mechanism of growth and decline, self closing or opening, in order to achieve the purpose of preventing equipment overpressure.
當安全閥的整定壓力大于被保護系統的工作壓力時,閥門處于關閉狀態,這時作用在閥瓣上的力有彈簧預緊力F,方向向下,介質的作用力,方向向上,再就是閥座對閥瓣的托力(密封力),這個密封力在密封面上所產生的比壓力,保證了安全閥關閉件間有了必需的密封性。
When the safety valve set pressure is greater than the protection system of the working pressure, the valve is in the closed state, the role of the force on the valve spring preload F, downward direction, medium force, direction, and is the seat of the valve (sealing force), uplift forces the sealing force in the sealing surface than the pressure generated, ensuring the safety valve closure with the required sealing.
我們會用優良的、貼切的服務,讓顧客感受到親情般的溫暖,始終視顧客的安全如己如親。我們會用自然優勢打造產品的獨特之處,從而給消費者帶來享用產品時獨特的心境。
We will use good, appropriate service, so that customers feel the warmth of family ties, always depending on the safety of customers, such as ourselves. We will use natural advantages to create unique products, so as to give consumers a unique mood to enjoy products.

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