What are the precautions for using a single-speed, fixed electric hoist?

2022-10-12

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The single-speed fixed electric hoist features an integrated electromechanical design; by simply changing the die, it can press wire ropes of different specifications, making operation straightforward and safe, while also facilitating inspection, installation, and maintenance of the motor. However, its main drawbacks include poor motor heat dissipation, uneven group performance, and complex power supply systems as well as manufacturing and assembly processes. Next, let’s discuss the precautions for using a single-speed fixed electric hoist.

 Single-speed fixed electric hoist

For single-speed fixed electric hoists, the operator’s walking area and the path over which the load is moved must be free of obstructions. The up, down, left, and right directions of the manual push-button controls shall be accurate and responsive, and the motor and reducer shall operate without abnormal noise. The brake shall be sensitive and reliable. It should also be noted that no foreign objects are allowed on the operating track of the single-speed fixed electric hoist. The upper and lower limit switches must operate accurately. The hook stop nut shall be securely tightened. The hook shall rotate smoothly in both horizontal and vertical planes. The swivel pulley shall turn freely. In addition, it is crucial that there be no obvious defects: the wire rope on the drum must be neatly arranged, with no signs of the pulley grooves becoming disengaged, and lubrication must be adequate. The lifting equipment must show no abnormalities. The ambient operating temperature is -25~40 ℃. In fact, it is not suitable for operation in environments with highly corrosive gases or relative humidity greater than 85% such premises. It cannot replace an explosion-proof hoist for handling explosive materials. Single-speed, fixed electric hoists must not be used to lift or lower loads from the side, and overloading is strictly prohibited. During operation, operators must regularly inspect the wire rope for signs of misalignment, knotting, groove distortion, or excessive wear; any such issues must be promptly addressed. In addition, the rope guide and limit switches should be routinely checked to ensure they are functioning properly and to prevent potential accidents. The company is committed to expanding and developing both domestic and international markets, employing a dual approach that combines online e-commerce platforms with offline brick-and-mortar sales.

Single-speed fixed electric hoists are highly effective for lifting, pulling, loading and unloading heavy objects, and for welding inverted oil tanks; they are also suitable for the installation and relocation of various large and medium-sized concrete structures, steel structures, and mechanical equipment. They are ideal for construction and installation companies, factories, and mining enterprises, as well as for civil and bridge construction, power generation, shipbuilding, automobile manufacturing, and general construction. In addition to these applications, they can also be used in infrastructure projects such as highway and bridge construction, metallurgy, mining, slope stabilization and tunneling, and shaft lining and protection. During operation, operators must regularly inspect the wire rope for signs of misalignment, knotting, groove wear, or excessive abrasion; if any such issues are found, they should be addressed promptly. Furthermore, the rope guide and limit switches should be checked frequently to ensure they are safe and reliable. In particular, under no circumstances should limit switches be manually manipulated to halt the lifting of a load or to stop the operation of the equipment. Upon completion of work, the main power switch must be turned off to completely disconnect the power supply. In addition, dedicated maintenance personnel should be assigned to conduct weekly inspections of the single-speed fixed electric hoist’s key performance parameters and safety condition, and any faults discovered should be rectified without delay. Newly installed or reassembled single-speed fixed electric hoists must first undergo multiple no-load test runs. However, the power supply should not be switched on until the installation is fully completed. For example, prior to normal use, it is necessary to perform 125% Static load test at the rated load, lifting off the ground by approximately 100mm10 Check for normal operation after a few minutes.

The above article outlines the precautions for using a single-speed, fixed electric hoist. Those who were previously unfamiliar with this topic are encouraged to read it. That’s all for today’s key points—hopefully they will be helpful to those concerned.

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