To avoid accidents and unwanted incidents when using cranes, crane drivers need to be familiar with crane operating techniques to ensure safety and maximum efficiency. Cranes or other types of lifting machinery and equipment have the common characteristic of a mechanical system that combines the use of cables and a hoist system to hang the hoisting object, and often use a boom mechanism or bridge girder or portal frame for hoisting. heavy objects for construction and assembly of construction projects, or cranes for loading and unloading goods.
Nowadays, cranes are very popular, but very few people know the basic technical characteristics of the vehicle, especially in this industry, construction machinery, driving and operating wheeled cranes. One of the particularly high-risk industries often makes mistakes that are overloaded and leave unpredictable consequences. Often people only pay attention to the overload of reach, which is an extremely serious shortcoming.
WHEN CRANE TRUCKS OFTEN 3 CASES OF OVERLOADING. Overloading reach Overloading the boom Overloading the reins The manufacturing engineer has calculated all 3 cases and designed an auto-shutoff safety system and load meter to ensure safety but in reality when working a lot When we still have to overwork the load, they have designed a load pressing system for us, but not everyone can use this function well. - Overloaded crane reach often occurs when hoisting goods far away from the weight of the cargo plus the weight that requires a lot of low reach, causing loss of balance and causing the vehicle to overturn.
- Overloaded cranes that burn their booms often happen when the boom has a long reach or a short radius, and when lifting a load that exceeds the allowable weight, the boom will break, especially when using an auxiliary boom, the main boom is all over and the auxiliary boom is piggybacking. will be very weak.
- Overloaded cranes with reins often occur when lifting heavy goods with a short radius and short output rods (the booms are designed evenly). Cranes that have a separate output from the cylinder will be able to lift heavier loads without the outrigger cable system. of the remaining segments. At that time, the boom will not be overloaded, the reach will not be overloaded, but it will cause the bridle cable in the boom to break, the boom and the cargo will roll back, which is extremely dangerous.
Instructions for operating cranes safely and effectively. Check crane parts, crane machines, and cranes before operating.
1. Check the outside of the crane Check the lights, crane safety barriers and overload information warning system... Check all parts: bolts, screws, belts, crane , hooks, links... if found loose, rusty or deformed, they need to be replaced immediately. Check the fuel tank: oil, lubrication system, cooling, check the vehicle's air pressure. Ensure the cockpit is clean and tidy. Ensure a safe distance from high voltage lines
2. Check if the crane is unloaded. The crane can only move when the outriggers are retracted. The safe distance from the rotating part of the axle to obstacles is at least 1m. Test with static load Test with dynamic load Check the lifting capacity and outrigger pressure of the crane. If not carefully calculated, it can lead to the vehicle overturning. Pay special attention that the surface pressure of the pad legs is not greater than the ground load. The crane truck must be firmly fixed before lifting the crane. The parking place must be on a solid level, with anti-sink and sinking measures. Use the outrigger pad under the outrigger properly according to regulations. Check the balance and stability. of the machine using a meter
3. Pay attention to the operation of a loaded crane. When tying the load, use uniform cables or chains to ensure balance. For packages with sharp corners, padding is required to prevent wear or breakage. When lifting the load, hang the sling in a vertical direction. Before lifting the load to the set position, check at 0.2m level. If the situation seems stable, continue. Otherwise, it must be lowered to reset. When moving in a horizontal direction, the load must be 0.5m higher than the obstacle. There are load assessments and actual construction status.
4. While the crane is operating, it is strictly forbidden to drag the load with the wrapped drum. Lift the load when it is unstable or the cables and chains are misaligned. Within the crane's turning radius, it is not allowed to stand close. The load is buried or obstructed by other obstacles. When the engine has not completely stopped, change of direction is absolutely not allowed. In addition, drivers need to read and understand the regulations and instructions of the crane and crane manufacturers to operate properly.
When experiencing damage beyond control, the crane must stop operating to ensure the safety of human life and machinery.
