| Needle valve knowledge|Needle valve drive device |
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Needle valveThe driving device uses external power to open and closeNeedle valveinstallation.The purpose of using the drive device is to make the operation of the valve labor-saving, convenient, fast and reliable, or to realize automatic control and remote control.The basic requirements of the valve drive device are: torque or thrust can meet the opening and closing needs of the valve, the stroke and torque control is accurate and reliable, the selection of power is suitable for the site situation, the opening and closing action meets the control requirements, and the device itself is light and small. Needle valveThe driving device is divided into multi-rotation type, partial rotation type and linear reciprocating type according to the movement mode of the output shaft3Kind.The multi-turn type is the multi-turn rotary type, which is suitable for valves whose stem or stem nut needs to be turned multiple times to fully open or fully close, such as gate valves and globe valves. The series of output torque values are generally40~10000Nm(Thrust is20~1100Thousand cattle).The part-turn type is suitable for valves whose stem can be fully opened or fully closed within one turn, such as ball valves and butterfly valves. The output torque series are generally 125~125000Nm.The linear reciprocating type is suitable for valves whose stem can be fully opened or fully closed only by linear reciprocating movement, such asNeedle valve. Needle valveAccording to the power source, the driving device can be divided into manual device, gear transmission device, pneumatic device, electric device, hydraulic device, gas-liquid linkage device, electro-hydraulic linkage device, etc.The most primitive and simplest valve drive device is a hand wheel and a handle.along withNeedle valveLarge-scale production and automation of the production process, for all kinds ofNeedle valveThe need for drive devices is increasing.Needle valveThe drive device occupies an important position in industrial production automation. |