Waterproof Test for Stage Electric Hoists

To ensure that the stage electric hoist can still operate normally after being taken out of the water during the waterproof test, it is necessary to make preparations before the test, operate in a standardized manner during the test, and conduct inspections and handling after the test. The specific content is as follows: Pre - test Preparations - Select the Appropriate Product: Ensure that the stage electric hoist used for the test has no quality defects. All components are firmly installed, and there are no problems such as damage or aging of the seals. Also, it should have a certain waterproof design or protection level, and theoretically possess a certain degree of waterproof ability. - Record the Initial State: Conduct a detailed inspection and record of the appearance of the electric hoist, the connection of various components, electrical performance, etc., including measuring the insulation resistance, testing the lifting and lowering functions, and checking the braking performance, etc., in order to compare with the state after the test. Standardized Operations during the Test Process - Control Immersion Conditions    - Depth and Time: Determine the immersion depth and time reasonably according to the waterproof design of the electric hoist and the expected usage environment. Generally, it can be immersed at a depth of 0.5 - 1 meter underwater for 2 - 4 hours. It should not be immersed for too long to avoid unnecessary damage.    - Nature of the Water: Try to use clean fresh water for the test, and avoid using water containing corrosive substances or impurities to prevent corrosion or blockage of the electric hoist. - Process Monitoring: During the immersion process, the state of the electric hoist in the water can be observed through equipment such as transparent observation windows or underwater cameras. Check whether a large number of bubbles emerge (indicating possible water leakage), as well as whether there are abnormal shaking, component detachment, etc. Post - test Inspection and Handling - Appearance Inspection: After taking the electric hoist out of the water, first conduct a comprehensive inspection of its appearance. Check whether there are obvious water stains, marks, whether the housing is deformed or cracked, and whether there are signs of looseness or water ingress at the connection parts of various components. - Drying Treatment    - Surface Drying: Use a clean towel, absorbent materials, etc. to dry the water on the surface of the electric hoist. For parts that are not easy to dry, such as gaps and holes, tools such as a hair dryer can be used for low - temperature drying. Note that the temperature should not be too high to avoid damaging the components.    - Internal Drying: For internal spaces that may have water ingress, such as the motor cavity and control box, natural ventilation for air - drying, placing desiccants, or using professional drying equipment can be adopted for drying treatment. During the drying process, some detachable components can be appropriately opened to accelerate the drying speed, but pay attention to protection to avoid the entry of dust and other impurities. - Performance Testing    - Insulation Test: Use a megohmmeter to measure the insulation resistance of the electric hoist to ensure that its insulation performance meets the requirements. Generally, the insulation resistance should not be less than 0.5 megohm. The specific value can refer to the product manual or relevant standards.    - Function Test: After confirming good insulation performance, connect the power supply for function testing, including functions such as lifting, lowering, braking, slow - speed and fast - speed operation. Check whether the operation of the electric hoist is stable, whether there are abnormal noises, jams, slipping, etc., and whether the braking is sensitive and reliable.    - Accuracy Test: Test the lifting height, positioning accuracy, etc. of the electric hoist to check whether it can meet the design requirements, ensuring that it can accurately complete the lifting and positioning tasks of stage equipment in actual use. If any abnormal conditions are found in the electric hoist after the test, it should be repaired and debugged in a timely manner

until it resumes normal operation. At the same time, record the test process and results in detail to provide a reference for subsequent maintenance and improvement.