SEVENCRANE underhung double girder bridge crane is a commonly bridge crane with electric trolleys. The performance parameters of the double-girder bridge crane include: lifting capacity, lifting height, span, mechanism working speed, working level, wheel pressure, etc. These parameters are explained in detail below:
1. Lifting capacity: refers to the maximum lifting weight allowed by the double-girder overhead crane during normal operation.
2. Lifting height: the distance between the upper limit position and the lower limit position of the spreader (hook or electromagnetic chuck, etc.).
3. Span: the distance between the vertical center lines of the wheels at both ends of the crane’s main beam.
4. Mechanism working speed (5th speed)
(1) Lifting speed: refers to the lifting speed of the lifting mechanism motor at the rated speed and when the pickup device is fully loaded.
(2) Cart operating speed: refers to the operating speed of the crane when the motor of the cart operating mechanism is at the rated speed.
(3) Trolley operating speed: refers to the operating speed of the lifting trolley when the motor of the trolley operating mechanism is at the rated speed.
5. Work level: It is an indicator of the working status of the whole machine that indicates the full load level of the industrial underhung double girder bridge crane’s lifting load and the busyness of the number of lifting operations. The working levels of the overhead cranes are divided into 8 levels from A1 to A8: light (A1-A3), intermediate (A4, A5), heavy (A6, A7), and extra heavy (A8).
6. Wheel pressure: The maximum vertical pressure exerted on the wheels of the cart by the bridge’s own weight and the trolley’s dead weight and rated lifting weight when the trolley is at the extreme position.
Operation precautions for top 10 underhung double girder bridge crane for sale
1. When lifting heavy objects for the first time in each shift, the heavy objects should be lowered again after being lifted 0.5 meters above the ground, and the brake performance should be checked and confirmed to be reliable before normal operations.
2. During operation, the operator should sound the alarm for the following operations according to regulations.
① Lifting and lowering heavy objects; when driving large or small vehicles;
② When the crane is passing through with unclear vision, it must continuously sound the alarm;
③When the crane is driving close to another crane in the span.
④When lifting heavy objects close to people.
3. Operations should be carried out in accordance with unified command signals.
4. When there is a sudden power outage during work, all controller handles should be placed in the “zero” position, and the crane should be checked to see if it is operating normally before resuming work.
5. During normal operation, it is strictly prohibited to apply the reverse brake to stop the crane or trolley. When changing the direction of movement of the crane or trolley, the handle must be placed in the “zero” position to completely stop the mechanism before driving in the reverse direction.
6. For warehouse underhung double girder bridge crane cost with two hooks, when the main and auxiliary hooks are replaced and the heights of the two hooks are similar, the main and auxiliary hooks must operate separately to avoid collision between the two hooks.
7. A crane with two hooks is not allowed to lift two objects with two hooks at the same time; adjust the lifting mechanism brake when it is not working.
8. It is not allowed to use the limited position limiter to stop, and it is strictly prohibited to adjust the lifting mechanism brake when there is a load.
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