Crane safety operation procedures
1. The crane driver is specially trained. After passing the examination of the relevant departments, the certificate is issued and the permit is issued. It is strictly forbidden for the unlicensed personnel to operate the lifting equipment.
2.Before work, the crane driver must check whether the devices are normal. The crane is partially de-energized in the substation and the crane casing must be reliably grounded.
3.When lifting heavier objects, the heavy objects should be lifted about 10 centimeters from the ground to check the stability of the crane and brake is flexible and effective, in order to continue to work under the confirmed normal conditions.
4.The crane driver must cooperate with the conductor and obey the conductorundefineds signal command. The horn must be sounded before the operation. If the command signal is not clear or wrong, the driver has the right to refuse execution. At work, the driverundefineds emergency stop signal to anyone must be obeyed immediately.
5.It is strictly forbidden to hang people on the station, and it is strictly forbidden to hang more than the top of the person. It is strictly forbidden for everyone to stand and pass under the hanging object.
6.When the crane is fully loaded, it is forbidden to use two or more kinds of operation at the same time. The left and right rotation angles of the lifting boom should not exceed 45°. It is strictly prohibited to slant, hoist and lift quickly. It is strictly forbidden to hoist objects buried in the ground, and it is strictly forbidden to hang and pull objects with a large area attached to the ground.
7.When the crane works near the live line, it should maintain a safe distance. Within the maximum range of rotation, the nearest distance to the transmission line is allowed to see the following table. The safety distance should be increased to 1.5 times in rainy and foggy weather. When the crane passes under the transmission line, the boom must be lowered.
8.Lifting a heavy object with two cranes at the same time must obey the unified command of the special person. The lifting speed of the two machines should be equal, and the weight of the object should not exceed 75% of the total lifting capacity allowed by the two machines. When tying the slings, pay attention to the distribution of the load. The load shared by each vehicle should not exceed 80% of the maximum allowable lifting capacity.
9.When the crane is working, the distance between the hook and the pulley should be kept at a certain distance to prevent the cable from being pulled off or the boom to be turned over. When the boom is fully extended to the maximum elevation angle and the hook is lowered to the lowest position, the steel cable on the hoist drum should be kept at least 3 inches.
10.When working, the elevation angle of the boom should not be less than 30°. When the crane is loaded with load, the amplitude of the boom should be avoided as much as possible. It is absolutely forbidden to change the operating lever before the crane is stopped.
11.When the wind at the operation site reaches the fifth level, the lifting operation with a large wind receiving area shall not be carried out; when the wind reaches the sixth level or above, the lifting operation shall not be carried out. Hanging objects are not allowed to hang in the air during work stoppages or breaks.
12.After the work is completed, the hooks and booms should be placed in the specified stable position and all control handles should be placed in the neutral position.
13.The command signal should be clearly explained to the crane driver in advance. If the command signal is not clear during the operation, a relay assistant should be set to accurately transmit the signal.
14.The command gesture should be clear, the signal should be clear, not allowed to carry gloves. 2.3 Lifting objects, should first check whether the binding is firm, the rope should be padded at the corners and at the fast mouth, the center of gravity of the lifting should be accurate, and the object should not be twisted, twisted, sunken or inclined after being stressed.
15.Before the object to be hung is fixed in position, the crane driver must not leave the work position, and it is not allowed to interrupt the work when the rigging is stressed or the lifting object is suspended.
16.When the crane driver refuses to lift due to overweight, the commander should take measures to reduce the heavy load of the crane and strictly prohibit overloading the command crane.
17.The crane driver should strictly abide by the “ten unhanging”
1. The overload or the weight of the suspended object is unclear;
2. The command signal is not clear and not hoisted;
3. The binding or hanging is not strong or unbalanced, which may cause sliding Hanging;
4, when hanging on the object or floating objects;
5, the structure or parts have defects that affect the safety work or damage;
6; when there is unclear embedded objects, do not hang;
7 The work site is dim, unable to see the site, the object being hoisted and the command signal is not hoisted;
8. The angle between the corner of the object and the bundled wire is not hanged; ;
9, the crane insurance device is not complete, not reliable, not hanging.