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水力控制閥結構特點及動作原理

人氣:97發表時間:2017-09-14
水力控制閥簡述
  Brief introduction of waterpower control valve
  1.結構特點
  水力控制閥一般分為隔膜型和活塞型兩大類,兩者工作原理相同,它由一個主閥(如圖1 .2)及其外裝的針閥、導閥、導管和壓力表等組合而成。并配合使用目的、功能及場所的不同而演變成遙控浮球閥、減壓閥、緩閉止回閥、流量控制閥、泄壓/持壓閥、水力電動控制閥、定水位閥、水泵控制閥、緊急關閉閥等。
  Structure characteristics
  The control valve for waterpower can be classified into the dissepiment type and the plunger type, which are of the same working principle. It is made up of a master valve(figurel、2) and a outside needle valve,  pilot valve, pipe and pressure gauge etc. It also can be categorized into float valve for  remote control, reducing valve, slow close check valve, flow control valve,  releasing pressure/keeping pressure valve, electric control valve for waterpower, water level valve, water pump control valve, emergency shutoff valve according to the using purposes and functions as well as the places in service.
  2.動作原理
  水力控制閥以上下游壓力差△P為動力,實行自動調節,從而使主閥閥盤完全開啟或同時關閉,或處于調節狀態。
  Working principles
  Control valve for waterpower can be adjusted automatically depending on the different pressure between upriver and downsteam making the disc of the master valve open completely or close fully at the same time, or valve in adjusting condition.
  全閉狀態:當主閥進口端水壓分別進入閥體及控制室,且主閥外部之球閥同時關閉,此時主閥處于全閉狀態,
  Full cut-off condition: when inlet pressure enters body and control room, meanwhile the exterior ball valve of the master valve closes so the master valve sha日be in condition of f}川cut-off:
  全開狀態:當主閥外部球閥全開后,此時控制室內水壓全部被排到大氣或下游低壓區時,主閥呈全開狀態,
  Full opening condition: After the exterior ball valve of master valve opens completely, the control room pressure is let out to the air or the downsteam lower pressure area to make the master valve be in condition of full opening.
  浮動狀態:調節主閥外部之球閥開度,使水流經過針閥與球閥之間水流達到平衡,此時主閥處于浮動狀態。
  Floating condition:the open-close degree of adjust the exterior ball valve of the master valve,make the flow through  needle valve and ball valve balance, at this time the master valve shall be in floating condition.
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