Safety of hooks, wire ropes and brakes for single beam cranes
Posted: Dec 12th, '24, 20:37
The three main components of a single beam crane are the hook, the wire rope and the brake. The intelligent crane is a multi-action lifting machine that lifts vertically and carries heavy objects horizontally within a certain range. [1] The work is characterized by intermittent movement, that is, the corresponding mechanism of taking material, migration, unloading and other actions in the more work cycle is alternately working, and the development and use of cranes in the market is more and more extensive. The horizontal distance, in m, between the rotating center line of the gantry crane and the plumb line of the fetching device. The amplitude of the non-rotating type boom crane refers to the horizontal distance between the center line of the spinner and the rear shaft of the boom or other typical axes. For the boom type crane, its rated lifting weight changes with the amplitude, and its lifting characteristics are characterized by lifting torque. The value indicated on the sign is the larger lifting weight. If there is a problem with these three components, it is easy to cause the suspended object to fall, and even cause serious casualties.
The common problem of the hook is mainly the hook of a kilo rope, that is, when the object is not well bound, the Angle between the kilo rope can not exceed 120 degrees, or the hook is touched sideways in the lifting, and the weight is placed at the bottom when the kilo rope will be pulled out of the hook. In addition, because the safety hook system is designed and manufactured with gray cast iron or cast steel model materials, it is brittle, non-collision resistant and easy to break, so in the process of lifting, if there is no narrow space or careless operation by the operator, the pulley will be damaged by collision. If the pulley system is damaged, the broken edge of the wheel will cause the cutting of the steel wire rope, and even the need to cut the steel wire rope will cause a traffic accident. If the operator does not refuel the hook pulley in time, the pulley can lead to excessive groove bottom wear due to inflexible rotation, and over time, the pulley will be half cracked, and the hook will be issued during operation. Not only that, when the amount of wear at the bottom of the groove continues to increase, it will make the wire rope directly embedded in the depth of the country, increase the friction resistance, which affects the steel wire rope as the embedded amount deepens, increases the social resistance, and thus increases the amount of steel wire drawing and accelerates the asset scrapping.
The common problems of wire rope are often caused by human factors. For example, when the operator is operating, the wire rope is often worn and bruised with some equipment and buildings, resulting in local breakage and deformation of the outer layer of the wire rope; When the reel is operated, the steel wire rope is twisted around multiple layers on the reel; The hook often rotates in the air, and the cause of the accident is that the wire rope is twisted; Long time oil shortage of wire rope, surface corrosion; The wire rope is often burnt at high temperature, and the wire rope burns out in contact with the power high-voltage line.
3. The common problems of the brake are: the main spring of the brake is damaged or adjusted too loosely, and the braking torque is insufficient; The brake lever lock nut is loose, the lever moves, or the joints of the lever system are stuck. The gap between brake-shoe openings is abnormal. When the brake is opened, the gap of the brake shoe on the other side can reach 2 ~ 3mm, and the gas watt of the brake shoe on the other side is also attached to the brake wheel, so that the brake and the brake wheel wear faster, and the heavy load can not brake. In addition, too tight braking is also unfavorable, because when the brake opening gap is less than the normal value, the rotation resistance of the brake wheel will increase, often smell the smell of burnt skin, when the friction thermal expansion, on the contrary, the car will not brake and accident.
To ensure the safe use of the three components of a single beam crane and prevent accidents, each crane user and operator can do the following:
More, to ensure that the safety hook anti-decoupling working device is intact, the hook should be anti-collision when in use; To often to each lubrication point refueling; The amount of cracks, breaks or wear found at the site can exceed the mark by replacing the pulley in time. It is necessary to check the hook body frequently, find that there are cracks and the wear amount of the hook mouth exceeds 10% of the specified thickness and the student's opening degree changes, should promptly put forward rectification. It is worth noting that the hook defect problem can not be repaired welding technology.
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The common problem of the hook is mainly the hook of a kilo rope, that is, when the object is not well bound, the Angle between the kilo rope can not exceed 120 degrees, or the hook is touched sideways in the lifting, and the weight is placed at the bottom when the kilo rope will be pulled out of the hook. In addition, because the safety hook system is designed and manufactured with gray cast iron or cast steel model materials, it is brittle, non-collision resistant and easy to break, so in the process of lifting, if there is no narrow space or careless operation by the operator, the pulley will be damaged by collision. If the pulley system is damaged, the broken edge of the wheel will cause the cutting of the steel wire rope, and even the need to cut the steel wire rope will cause a traffic accident. If the operator does not refuel the hook pulley in time, the pulley can lead to excessive groove bottom wear due to inflexible rotation, and over time, the pulley will be half cracked, and the hook will be issued during operation. Not only that, when the amount of wear at the bottom of the groove continues to increase, it will make the wire rope directly embedded in the depth of the country, increase the friction resistance, which affects the steel wire rope as the embedded amount deepens, increases the social resistance, and thus increases the amount of steel wire drawing and accelerates the asset scrapping.
The common problems of wire rope are often caused by human factors. For example, when the operator is operating, the wire rope is often worn and bruised with some equipment and buildings, resulting in local breakage and deformation of the outer layer of the wire rope; When the reel is operated, the steel wire rope is twisted around multiple layers on the reel; The hook often rotates in the air, and the cause of the accident is that the wire rope is twisted; Long time oil shortage of wire rope, surface corrosion; The wire rope is often burnt at high temperature, and the wire rope burns out in contact with the power high-voltage line.
3. The common problems of the brake are: the main spring of the brake is damaged or adjusted too loosely, and the braking torque is insufficient; The brake lever lock nut is loose, the lever moves, or the joints of the lever system are stuck. The gap between brake-shoe openings is abnormal. When the brake is opened, the gap of the brake shoe on the other side can reach 2 ~ 3mm, and the gas watt of the brake shoe on the other side is also attached to the brake wheel, so that the brake and the brake wheel wear faster, and the heavy load can not brake. In addition, too tight braking is also unfavorable, because when the brake opening gap is less than the normal value, the rotation resistance of the brake wheel will increase, often smell the smell of burnt skin, when the friction thermal expansion, on the contrary, the car will not brake and accident.
To ensure the safe use of the three components of a single beam crane and prevent accidents, each crane user and operator can do the following:
More, to ensure that the safety hook anti-decoupling working device is intact, the hook should be anti-collision when in use; To often to each lubrication point refueling; The amount of cracks, breaks or wear found at the site can exceed the mark by replacing the pulley in time. It is necessary to check the hook body frequently, find that there are cracks and the wear amount of the hook mouth exceeds 10% of the specified thickness and the student's opening degree changes, should promptly put forward rectification. It is worth noting that the hook defect problem can not be repaired welding technology.
Choose BONOVO for high-quality, customizable brush cutters for skid steers with fast delivery. Contact us today to discover how our superior products can enhance your land management tasks!
for more info just visit our website at www.bonovogroup.com
contact # : +86 158 6218 2088
email : sales@bonovogroup.com