Technical solution for manual to electric conversion of gate valves

Technical solution for manual to electric conversion of gate valves

Considering the cost of the original manual valve, it is indeed easy to directly transform the electric valve, but the cost is high. However, with the advancement of technology, ordinary manual valves can now be converted into electric valve devices.

1Transform manual valves into electric valves and determine suitable valves and electric devices

The customer needs to provide the types of manual valves (ordinary valves) such as gate valves, globe valves, butterfly valves, ball valves, etc. The structure of the valve determines the operation mode of the valve electrical device.

Valve electric devices can be divided into angular stroke, linear stroke, and multi turn types according to their operating modes.

1Multi rotation electric actuator: requires operation3600The above ° is used to achieve the opening and closing of valves, mainly for globe valves, pipe clamp valves, and diaphragm valves;

2Most angular and linear actuators are modified on the basis of multi turn actuators:Based on a multi turn system, it is composed of a worm gear and a secondary gearbox0~90Angle stroke electric actuator; The linear electric actuator is composed of screw components.

① Angular travel:0~90Angle stroke, used to control angle stroke valves such as ball valves, plug valves, butterfly valves, and louver valves;

② Straight stroke: Output force, generate displacement, commonly used to support various valves to form electric valves or electric regulating valves (such as regulating valves, single seat valves, etc.)

Technical solution for manual to electric conversion of gate valves

Convert manual valve to electric valve and determine the force or torque to be output by the electric device(torque)

For multi rotation electric devices, partial rotation electric devices, and angular stroke electric actuators, the important parameter is torque, measured in units ofN.mThe opening or closing of the valve requires torque to be applied to it. If the torque is small, it may result in the inability to close or open.

For linear electric actuators, the important parameter is force, measured in units ofNIf the same force is small, the valve cannot be opened or closed.

Therefore, in the process of choosing an electric device, a simple principle should be followed: it is better to choose a large one than a small one.

Transforming manual valves into electric valves to determine the control mode of the electric device for the valve

Category I:Ordinary electric devices have simple dial displays for valve switches, while external control requires an electric device control box, which is the basic model.

The second category; Mechatronics electric device. This electric device has its own control box, also known as mechatronics integration. Equipped with LCD display and feedback capability4～20maThe standard signal can determine the fully open, fully closed, and uncertain intermediate positions of the valve, that is, switch control. The electrical components are installed on a reversible board to adjust the torque control mechanism, stroke control mechanism, and opening indicator mechanism.

There are three buttons on the button box, the middle is the on-site and remote conversion button, the left side is the on-site valve closing button, the right side is the on-site valve opening button, the remote control button box, remote controlDC24VSwitching contacts and opening the button box are on-site operations. There are two knob boxes on the knob device, one is the mode button knob (red), and the other is the operation button (black). Relying on the electrical housing, the protruding arrow indicates the operation mode. The operation button rotates clockwise to open the valve with the arrow, and counterclockwise to close the valve. ）

The third category:Adjusting the electric device is to add analog control on the basis of the electromechanical integrated electric device, which can receive and feedback4～20mAStandard signal can achieve precise adjustment of the valve, determining the fully open, fully closed, and precise intermediate position of the valve.

Before renovation

after renovation

Before renovation

after renovation