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Correct debugging method of electric valve

by:Sino Valves     2021-02-24
When the electric valve electric device is started, the start button on the electric panel should be pressed, and the motor will start and the valve will open. After a certain time, the motor will automatically stop running. The 'opened' signal light on the electric panel should be clear; if the valve is closed , You should press the close button on the electric panel, the valve will run in the closing direction, and after a certain period of time, the valve will be fully closed. At this time, the 'closed' signal light is on. During the operation of the valve, the signal lamp in the intermediate state of opening or closing shall indicate accordingly. The valve indication signal is consistent with the actual action, and can be closed tightly and opened, indicating that the electric device is normal. Electric gate valve is used in different places because the water pressure difference or air pressure difference between the two ends of the gate is different (when the gate valve is closed), the torque limiting mechanism can be adjusted appropriately. When used in places where the water pressure or air pressure difference between the two ends of the electric gate valve is low, the torque limit mechanism should be adjusted to a lower torque. When using the HZ series, z series or ZB and the capsule spring pod, the Hz series turn When the torque limiting mechanism is used, the adjusted torque value is required to be larger, and vice versa. The adjustment methods of the above series are the same. When adjusting the ZD series valve electric device, it is necessary to remove the side cover of the box body, adjust the torque limit mechanism, loosen the set screw in the adjustment nut, loosen the adjustment nut, relax the torque spring, and put it to the loosest position , Then tighten the set screw in the adjusting nut to fix the adjusting nut. Note that the top end of the set screw must fall in the shaft groove. If the top end is not aligned with the shaft groove, just turn the adjusting nut a little in the direction of the compression spring to align it with the shaft groove set screw. Then install the side cover, adjust and open the valve. If the torque limiting mechanism operates, the spring is too loose and tightened to stop. In this way, the torque limiting mechanism can work at a lower torque to ensure that the torque limiting mechanism will reliably operate when the stroke control mechanism fails or the torque is exceeded for other reasons, and the motor power supply is cut off to protect the valve from damage. How to debug the switch limit of the electric valve device After the electric head is connected to the power supply, how to electrically stop the valve switch in place, and then save it. The electric valve has a larger operating force than ordinary valves. The switching speed of the electric valve can be adjusted. The structure is simple and easy to maintain. It can be used to control air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media, etc. The flow of various types of fluids. Due to the cushioning characteristics of the gas itself during the action, it is not easy to be damaged by jamming, but there must be a gas source, and its control system is also more complicated than an electric valve. This type of valve should generally be installed horizontally in the pipeline. Simply put, the electric valve is to use an electric actuator to control the valve, so as to realize the opening and closing of the valve. It can be divided into upper and lower parts, the upper part is the electric actuator, and the lower part is the valve. The electric valve should be simulated action and pressure test before installation. Advantages: It has a good effect on liquid media and large pipe diameter gases, and is not affected by the weather. Not affected by air pressure. Disadvantages: high cost, bad in humid environment. For the electric valve device, see the fault and troubleshooting method. The power cord is disconnected 2. Control circuit failure 3. Failure of stroke or torque control mechanism 1. Check the power cord 2. Troubleshoot the line 3. Troubleshoot the stroke or torque control mechanism. 2 The rotation direction of the output shaft does not meet the requirements. The phase sequence of the power supply is reversed, and any two power lines are reversed. 3 Motor overheating 1. Continuous working time is too long 2. One phase line is disconnected 1. Stop running and let the motor cool down 2. Check the power line 4, the motor stops during operation 1. The valve is faulty 2. The electric device is overloaded, and the torque control mechanism operates. Check the valve 2. Increase the setting torque 5 After the valve is in place, the motor does not stop or the light does not light up. The stroke or torque control mechanism is faulty 2. Improper adjustment of travel control mechanism 1. Check the stroke or torque control mechanism 2. Re-adjust the stroke control mechanism. The electric valve controller is one of the components of the overall automatic control system. Its installation and debugging mainly need to pay attention to the following points: 1. The model and specifications purchased by the customer are installed and fixed according to the figure, and the rear panel is grounded. The terminal must be grounded reliably. 2. The circuit diagram numbers of the controller and the electric device are the same. Use the cable to connect the controller and the electric device according to the same terminal number. If the user does not need on-site control, the 12, 13, and 14 terminals can not be connected. When the electric valve controller is used in an automatic control system, terminals 12, 13, and 14 are used as the input terminals for the corresponding signals of 'automatic opening' and 'automatic closing'. 3. Press the power button, the power indicator light is on, the on-site remote control switch points to the remote control, and the remote control indicator light is on. 4. Open the valve to 50% opening with the handwheel, press the valve open or close button, check whether the rotation direction of the valve is consistent with the pressed button, if not, press the stop button immediately, cut off the three-phase power supply, and change Any two phases of the three-phase power supply. 5. Press the valve open button, when the valve is fully open, the valve open indicator on the front panel will be on; press the valve close button, when the valve is fully closed, the valve close indicator on the front panel will be on; when the valve is open When you need to stop during the closing process, press the stop button to stop the valve. Short-circuit the No. 4 and No. 7 terminals, and the emergency light on the front panel will turn on. 6. When the valve is in the fully open position, adjust the adjustment potentiometer on the front panel to make the opening meter display 100%. 7. The on-site remote control switch points to the site, the on-site indicator light is on, short-circuit terminals 12 and 13, and the valve runs in the open direction, which is the jog state; short-circuits the terminals 12 and 14, and the valve runs in the closed direction, which is the jog state. . 8. The fuse on the rear panel is 5×20, 1A.
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