LQ electric deviceBefore installation, make sure the valve is in the fully closed position, with the keyway of the output shaft of the electric device and the mutual position of the two limit screws. Then, install the valve stem and key together into the output shaft of the electric device, and fix the flange of the valve and the joint of the electric device with the same bolt.

Turn the limit screw into the closed position until it touches the limit block inside the electric box, then turn it out 1-2 times, and finally tighten the locking nut on the limit screw.

Rotate the handwheel to open the valve to the "fully open" position, and adjust the limit screw of the open position according to the above method.

Open the box cover and connect the core wire of the cable to the corresponding terminal according to the electrical control wiring diagram

Rotate the handwheel to make the valve in the open position of about 50%, turn on the power and check whether the electrical control "on" and "off" buttons and indicator lights are consistent with the rotation direction of the valve. If they are not consistent, adjust the phase sequence of the power supply to make them consistent.

adjust

Purpose of adjustment

Adjust the stroke control mechanism: When the valve reaches the "fully open" and "fully closed" positions required by the user, the cam can trigger the micro switch and make its contact action cut off the motor power supply.

Adjust the working position of the potentiometer to ensure that the valve opening indicated by the opening gauge in the control room is consistent with the actual situation.

Steps for adjustment

Adjustment of travel control mechanism

1. Cut off the power and turn the handwheel to bring the valve to the "fully closed" position.

2. Rotate the two lower cams in the stroke control mechanism clockwise to activate the corresponding micro switches (hear a "click" sound), so that the 2GXK switch acts slightly earlier than the 1GXK switch, and then tighten the set screws on the cams.

3. Rotate the handwheel to open the valve to about 50% full open position, turn on the power and electrically close the valve. Use a microswitch to cut off the motor power and stop the electric device from working.

4. Check whether the valve stop position indicated by the opening indicator dial meets the requirements. If it does not meet the requirements, make slight adjustments according to the above method until it meets the requirements.

5. Rotate the rear wheel to place the valve in the "fully open" position, and simultaneously rotate the cam in the opposite direction to the adjustment direction according to the above method. Adjust the two cams that control the "fully open" position in the stroke control mechanism, so that when the valve is electrically opened, its stopping position meets the requirements.

Adjustment of potentiometer working position

The large rotation angle of the potentiometer is about 270 °, and the designed working angle is 225 °. The purpose of adjustment is to make the 225 ° working angle of the potentiometer within its large rotation angle of about 270 °, so that the opening meter in the control indicates correctly and does not damage the potentiometer. The specific adjustment method is as follows:

1. When the valve is in the "fully closed" position, rotate the potentiometer shaft with the reverse welding needle. When it reaches the end point, rotate it back about 10 ° to fix the gear and potentiometer shaft. Then loosen the screw on the sector gear so that its left end merges with the potentiometer gear and rotates the set screw on the sector gear tightly.

2. Adjust the "zero" and "full" knobs on the opening gauge in the control room so that when the valve is in the "fully closed" position, the opening gauge indicates "0" and when it is in the "fully open" position, the opening gauge indicates "100"“