平板閘閥的工作原理
上海精品无码国产自产拍在线观看蜜桃閥門有限公司
之前介紹SAF2507雙相不鏽鋼高壓自力式調節閥,現在介紹平板閘閥的工作原理:雙重密封、自動泄壓、免維護 平板閘閥的啟閉件是平行閘板滑動閥。關閉件可以是單閘板或帶有撐開機構的雙閘板。閘板向閥座的壓緊力是由作用與浮動閘板的介質壓力來控製。如果是雙閘板平板閘閥,則兩閘板見的撐開機構可以補充這一壓緊力。
平板閘閥應用:
平板閘閥主要應用於燃氣管線、液化氣、天然氣、石油輸送、化工、城市管道、放空係統和汽儲存裝置上,用作啟閉設備。
平板閘閥用途分類:
平板閘閥在使用場合不同的情況下,可分為有導流孔平板閘閥、無導流孔平板閘閥、油田平板閘閥、管線平板閘閥、燃氣平板閘閥等。
平板閘閥相關參數:
通用規格:DN50-300mm;
溫度範圍:-20℃≈550℃;
壓力範圍:PN1.6-10Mpa;
閥體材質:WCB、304、316、WC6、WC9;
閥杆材質:F6A、F304、F316、F304、F304;
閥板材質:不鏽鋼、合金鋼;
連接方式:法蘭式;
介質範圍:水、油品、蜜桃激情视频、石油、燃氣及某些腐蝕性液體等;
平板閘閥的工作原理平板閘閥的選用:
1、石油、天然氣的輸送管線,選用單閘板或雙閘板的平板閘閥。
2、成品油的輸送管線和貯存設備,選用無導流平板閘閥。
3、石油、天然氣的開采井口裝置,選用暗杆浮動閥座帶導流孔平板閘閥(API16A係類)。
4、帶有懸浮顆粒介質的管道,選用刀型平板閘閥。
5、城市煤氣輸送管線選用軟密封明杆平板閘閥。
6、城市自來水工程選用無導流孔明杆平板閘閥。
7、如需清掃管線的帶導流孔的明杆平板閘閥。
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2、對閥門施加管理壓力時(2),壓力作用於閘板,迫使它貼近出口閥座上PTFE環,壓縮它直到閘板停在鋼製閥座上,這樣,就形成了雙重密封,首先是PTFE對金屬密封,然後是金屬對金屬密封,閥座也被牢固地撿到凹槽,在這一點(3),O形圈阻止任何後部介質流。(如圖2)
3、閥體壓力泄放後,形成進口密封,管道壓力作用於進口閥座(4),使其移向閘板,這時形成PTFE對金屬的密封,同時,O形圈(5)與閥座凹槽形成緊密的密封。(如圖3)
4、閥門自動泄放多餘的壓力,當閥體壓力大於管道壓力時,由於熱膨脹,進口閥座推向凹槽,閥體內多餘的壓力在閥座與閘板之間泄放到管道中。(如圖4)
平板閘閥的產品結構特點Products design features
●閥體有鑄造和焊接兩種結構。 Cast and weld two structures with the body
●閥座采用O形密封圈密封和施加預緊力的浮動閥座結構,使閥門進出口雙向密封;並且該結構的啟閉力矩僅為普通閥門的1/2,能達到輕鬆開、關閥門。 The seal ring uses the floating seat ring structure with o-sear ring sealed and pre-tightening force applied to have inlet and outlet dual-way sealed;and the open-close moment with this structure is 1/2 that of the common valves only,able to lightly open and close valves.
●閥座采用密封麵上鑲嵌PTFE,具有PTFE對金屬和金屬對金屬的雙重密封,PTFE密封麵同時清除閘板髒物的作用, The seat ring uses the sealing face inlaid with PTFE,so has dual seals of PTFE to metal and metal to metal, the PTFE sealingface also acts as removing the dirt on the wedge disc.
●金屬對金屬密封的閥門,閥體外部設有注油脂結構,油脂通過注脂器、閥座進入閥門密封麵,使閥門達到零泄漏。 For the valve with the metal to metal seal,there is grease injector outside of it,grease gets into the sealing face through the injector and the seat ring to have the valve up to null leak.
●帶導流孔閥門的閘板,無論是全開或是全關始終與密封麵吻合,密封麵得到保護不受介質直接衝刷,從而延長使用壽命。 The wedge disc of the valve with flow guide hole is always fitted with the sealing face whether in full open or full close status to have the sealing face protected without being directly eroded by the medium so as to extend the duration. ●閥門在全開時,通道平滑為直線,流阻係數極小,無壓力損失,可通毛球清掃管線。 When fully opened,the valve's channel is smooth and linear ,with an extremely small flow resisting coefficient and no pressure loss,and the pipeline can be cleaned with hair-ball through it.
●本閥采用帶自密封能力的填料結構,無需經常調節,開、關極為輕便,且密封性可靠,填料函處設有輔助密封油脂注入結構,密封性能可靠,真正達到零泄漏;解決了通用閥門填料處容易外漏的蔽病。 This valve uses the packing structure with the ability of self-seal,needs no constant adjustment,features very light open and close and a reliable seal An assisting sealing grease injection structure is set in the packing to have the sealing performance absoluy reliable and get a true null leak,settling the problem for the packing place of universal valves to be easiest leak outward.
●閥門關閉時能自動卸掉內腔高壓(詳見工作原理圖),保證使用安全。 Automatic removal of the high pressure in the internal cavity when the valve is about to close(see the working principle diagram)for the details) so as to ensure safety.
●全封閉結構,防護性能好,可適應全天候要求。 Fully sealed structure leaves a good protective property,suitalbe for the requirement of 24-hour duty.
●升降杆閥門設有指示杆或觀察窗以表示閥門的啟閉情況,旋轉杆閥門采用封閉齒輪轉動啟閉指示機構。 An indication rod or viewing window is set Ascend and descend stemwith the valve to whow the open-close condition,Revolve stem with the valve Use a sealed gear-driving open-close indicating mechansim.
●直理式閥門外表麵采用環氧煤瀝青防腐處理,能與管線同壽命。 The external surface of the directly built-in valve is corrosion resisting treated with epoxy coal bitumen and can be the same duration as the pipeline. 與本產品相關論文:超高溫煙道蝶閥閥杆斷裂處理