As a high-frequency use facility in commercial buildings and public venues, the operational stability and service life of
automatic swing doors depend directly on the standardization of daily maintenance. Quarterly maintenance, as a key link between daily inspections and annual overhauls, can not only identify and resolve potential faults in a timely manner but also reduce component wear through systematic maintenance, effectively extending the service life of the equipment.
Adequate preparation before maintenance is a prerequisite for ensuring operational safety and efficiency, which needs to be carried out from three dimensions: personnel, tools, and safety protection. In terms of personnel, operators should have a basic understanding of the structure of automatic swing doors and electrical knowledge, and be familiar with the model parameters of the equipment to be maintained to avoid blind operations. Tool preparation should fully meet maintenance needs. Core tools include: screwdrivers (Phillips and flathead), Allen wrenches, torque wrenches, brushes, high-pressure air cans, lubricants (silicone-based grease, mechanical lubricating oil), rags, multimeters, etc.; at the same time, equipment manuals and maintenance records should be prepared to facilitate reference during operation and record archiving. Safety protection measures are essential. Before operation, turn off the main power supply of the automatic swing door and hang a warning sign stating "Maintenance in Progress, No Switching On" to avoid personal injury caused by accidental startup; for high-altitude operations (such as maintenance inside the chassis), set up a stable operating platform and wear protective equipment such as safety helmets and safety belts.
The quarterly maintenance of automatic swing doors should follow the principle of "external first, then internal; mechanical first, then electrical", focusing on systematic maintenance of core components to ensure the smooth coordinated operation of all parts.
The door body and guide rail are key mechanical components that directly affect operational stability, and the core of maintenance lies in cleaning and lubrication. First, wipe the surface of the door body, door frame, and guide rail with a rag to remove dust, oil stains, debris, etc., especially clean up the accumulated dust and foreign objects in the guide rail groove to avoid jamming or wear when the door body slides; for glass door bodies, use special glass cleaner to ensure light transmittance and prevent scratches on the glass surface. After cleaning, lubricate the guide rail: apply silicone-based grease evenly on the contact surface of the guide rail, with the amount of grease sufficient to cover the contact surface to avoid excessive grease adsorbing dust. At the same time, check the connection parts of the door body, use a torque wrench to inspect fasteners such as hinges and screws to ensure there is no loosening or falling off; if screw slipping or hinge deformation is found, replace the accessories in a timely manner.
The unit and transmission system are the power core of the
automatic swing door, and the focus of maintenance is inspection, cleaning, and precise lubrication. First, open the chassis shell, clean the dust inside the chassis with a brush and high-pressure air can, focusing on cleaning components such as the motor, gearbox, and transmission belt; check the motor operation status, detect the motor winding resistance with a multimeter to judge whether there is a short circuit, open circuit, etc., and observe whether the motor produces abnormal noise or overheating during operation. For the gearbox, check the lubricating oil level; if the level is below the standard line, supplement the same type of mechanical lubricating oil. For the transmission belt, check its tension and wear condition: press the belt with fingers, and the deflection should be controlled between 5-10 millimeters; if the belt is cracked, aged, or has insufficient tension, adjust or replace it in a timely manner. In addition, check the installation firmness of the encoder (position sensor) and signal connection lines to ensure stable signal transmission and avoid affecting the positioning accuracy of the door body.
The induction and control system is the key to ensuring the intelligent operation of the equipment, and the core of maintenance is sensitivity calibration and circuit inspection. First, clean the probes of various sensors (microwave radar, infrared induction, etc.) to remove dust and oil stains to avoid affecting induction accuracy; calibrate the sensor sensitivity through actual tests, adjust the induction range and trigger distance to ensure that it can accurately identify passage needs and avoid false triggering. Check the wiring connections of the control system, see if the terminals are loose or oxidized, wipe the surface of the terminals with a rag; if oxidation marks are found, apply a small amount of conductive paste to improve contact performance. At the same time, check the buttons and display screen of the control panel to ensure normal operation and clear display. In addition, test the operation logic of the control program, verify whether functions such as one-way triggering, two-way triggering, and delayed closing are normal; if there is a program abnormality, contact the manufacturer for debugging in a timely manner.
Safety protection devices are the "lifeline" of equipment operation, and quarterly maintenance must ensure that all protection functions are effective and reliable. Focus on checking anti-pinch sensors (infrared correlation, pressure sensors): block the sensor probe or use objects to simulate blocking the door body closing, test whether the door body can reverse immediately; if the anti-pinch function fails, check the sensor circuit or replace the sensor. Check the overload protection and emergency braking functions: simulate overload conditions and observe whether the equipment can automatically cut off the power supply; test the emergency opening device to ensure that the door body can be manually and quickly released in case of power failure or failure, ensuring the smoothness of personnel evacuation channels. In addition, check whether the safety warning signs are clear and complete; if they are blurred or damaged, replace them in a timely manner.
During maintenance, common fault troubleshooting should be carried out simultaneously to achieve "maintenance, troubleshooting, and problem-solving at the same time". Common faults and troubleshooting methods are as follows: 1. The door body jams during operation, which is mostly caused by foreign objects in the guide rail or insufficient lubrication; thoroughly clean the guide rail and supplement grease. 2. Insensitive induction or false triggering, which may be due to sensor probe contamination or improper sensitivity settings; clean the probe and recalibrate it. 3. Loud noise during motor operation, which is mostly caused by lack of oil in the gearbox or wear of transmission components; supplement lubricating oil or replace worn parts. 4. Door body positioning deviation, which may be due to loose encoder or insufficient belt tension; tighten the encoder or adjust the belt tension. For faults that cannot be solved on-site (such as control system faults), record the fault phenomenon and contact professional maintenance personnel for treatment.
After the completion of quarterly maintenance, do a good job in finishing work and record archiving. First, restore the equipment to its original state: close the chassis shell, remove the warning signs, and restore the main power supply; conduct a comprehensive trial operation of the equipment, test functions such as door opening, closing, induction, and safety protection to ensure normal operation. Second, fill in the maintenance record form in detail, recording maintenance time, operators, maintenance content, problems found, and treatment results to provide data support for subsequent maintenance. In addition, establish an equipment maintenance file, file each maintenance record, analyze maintenance data regularly, and optimize the maintenance cycle and process.
Standardized quarterly maintenance is a key measure to extend the service life of
automatic swing doors, which can not only reduce the failure rate and maintenance costs but also ensure the long-term stable operation of the equipment. Operation and maintenance personnel must strictly follow the operation procedures of this guide, pay attention to detail control, and flexibly adjust maintenance priorities according to equipment of different scenarios and models. Only by normalizing and standardizing maintenance work can we give full play to the passage advantages of automatic swing doors and provide users with a safe and convenient passage experience.
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