Valve electric device and the stem nut connection form can be divided into thrust type and torque type. Thrust-type electric devices need to withstand the axial thrust of the valve stem, while the torque-type electric device to the stem transfer torque. Thrust-type electric device installation valve can not directly replace the torque-type electric device. Because, with the thrust-type electric valve and electric torque device with a valve structure of the stent is different. When the valve with thrust-type electric device to install the torque-type electric device, the valve should be added to the original bracket thrust plate and then connect the torque-type electric device, in order to solve the thrust-type electric device and the torque-type electric device Connection conversion problem. Structurally installed Thrust-type electric valve (Figure 1) into the installation of torque-type electric valve (Figure 2), the common thrust plate shown in Figure 3. The thrust plate's role is to undertake the electric device torque, by the trapezoidal thread of the stem nut to transmit the axial force of opening and closing the valve, so in calculating the strength of the parts to withstand the axial force of the valve opening and closing, the design of axial force to undertake the way The key of new thrust plate structure design. Common type thrust plate from the flange box, gland nuts, anti-loosening screws and oil cups and other components. Insert the bearing and stem nut into the flange box and screw in the gland nut. In order to ensure the bearing rotation gap, gland nut screwed into the depth of special control, the gap is too large or too small to drive Figure 1 Install the thrust-type electric valve Lee. On the other hand, gland nuts to withstand the axial force of closing the valve, so the flange box and gland nut to be threaded connection, and ensure adequate strength. To ensure a fixed position gland nuts, but also to install anti-loose screws. This thrust plate structure is more complex, more parts, large amount of processing, assembly quality strict requirements, debugging a long time, high cost. The common thrust plate is a closed structure, to withstand axial force, so the flange box and gland nut to be threaded connection, and ensure adequate strength. The new (Figure 4) thrust plate is a one-way open design, bearing only upward axial force through the bearing, the downward axial force acting directly on the bracket, so the structure is simple. The new thrust plate facilitates connection with the motorized unit and bracket, while minimizing its height and weight. For example, the connection between the thrust plate and the supporter instead uses a screw hole on the thrust plate flange and is bolted
Econimoc series
Econimoc series
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