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阀门电动装置的选择方法

2013-1-15 12:00:40      点击:
 1.电动装置的最大推力允许值  如果阀门轴向力由电动装置承担(即阀杆螺母在电动装置中),其推力值不允许超过电动装置的允许值。   2.阀杆螺母的最大转圈数  在选用多回转阀门电动装置时必须说明阀门工作时阀杆螺母的最大转圈数,这样可以正确选配电动装置中位置指示机构的有关齿轮速比,以使位置指示有足够的精度满足阀门工作过程中对阀门开、关程度的观察,否则易造成错觉,影响正常工作。   3.阀杆直径的允许值  升降杆阀门选择电动装置应注意其允许通过的阀杆直径值,阀杆直径必须小于该值。另外,对于多回转电动装置,在选用时还应提出对阀杆罩高度的要求(与阀门痛径有关)。旋转杆阀门可不配带阀杆罩。   4.阀门与电动装置的连接  阀门与电动装置的连接型式与尺寸应符合国家标准:GB/T12222-1989多回转阀门驱动装置的连接,GB/T12223-1989部分回转阀门驱动装置的连接。  目前,部分回转阀门电动装置均有机械限位,以防止无法判断阀瓣位置,这类阀门与电动装置间的连接螺孔和键槽位置的对应关系要求严格。

 

 

译文:
Valve electric device selection method 1 power unit to allow the maximum value of thrust If the valve axial force borne by the electrical device (ie, stem nut in electric devices), the thrust value must not exceed the allowable value of electric devices. (2) the maximum number of turns stem nut In the selection of multi-turn valve actuators must describe the work of the valve stem nut maximum number of turns, so you can correct matching of electric devices in the gear position indicator body ratio, so that the position indicator valve with sufficient accuracy to meet work during the course of the valve gate opening and closing of the observation, otherwise easily lead to the illusion of normal work. 3 the value of stem diameter to allow Lifting the valve lever should be noted that the choice of electric devices allow the stem diameter, stem diameter must be less than this value. In addition, for multi-turn electric devices, should also be made ​​in the selection of high demands on the valve stem cover (with the valve diameter for pain). Rotating rod may not fit with the valve stem cover. 4 valves and electrical connection devices Valves and electrical connection device type and size should be consistent with national standards: GB/T12222-1989 multi-turn valve actuator connection, GB/T12223-1989 part-turn valve actuator connection. Currently, part-turn valve actuators have a mechanical stop to prevent the valve can not determine the location, type of valve with electric actuator screw and keyway connection between the location of the correspondence demanding.