What Is a Jib Crane?

A crane is a multi-action lifting machine that vertically lifts and carries heavy loads horizontally within a certain range. It is also called overhead crane, aerial crane, crane.

I. Subjective causes of the accident

(1) The driver lacks work experience and is paralyzed. After the crane is installed, the object to be hoisted cannot be carefully checked and its weight is evaluated, and it is lifted blindly.

(2) The driver violated the regulations and failed to strictly abide by the strict specifications of the technical parameters of the truck crane. As a result, the jib was too long and the boom width was too large, which caused an accident.

(3) The vehicle management department lacked management and could not arrange a special person to conduct on-site command when performing lifting operations.

Objective causes of the accident

(1)

(1) Each crane must be marked with a rated lifting capacity in a conspicuous place.

(2) During work, no one is allowed on the bridge or carried by hooks.

(3) Do not drive the crane without a license and after drinking.

(4) The operation must be focused, not allowed to talk, smoke or do irrelevant things.

(5) The vehicle must be clean; no equipment, tools, flammables, explosives, and dangerous goods are allowed to be scattered.

(6) The crane is not allowed to be overloaded.

(7) Lifting is not allowed in the following cases: inadequate binding; overload of the machine; unknown signal; cable stay; objects buried or frozen in the ground; someone on the suspended object; flammables and explosives without safety protection measures And dangerous goods; overfilled liquid goods; wire rope does not meet the requirements for safe use; the lifting mechanism is defective.

(8) When the crane is running on the line without obstacles, the hook or spreader and the bottom of the lifting object must be more than 2m above the ground. If you cross the obstacle, you must exceed the obstacle by 0.5m.

(9) When lifting less than 50% of the rated lifting weight, two mechanisms are allowed to move simultaneously; when lifting more than 50% of the rated lifting weight, only one mechanism can be used.

(10) For bridge cranes with main and auxiliary hooks, do not raise or lower the main and auxiliary hooks at the same time (special exception).

(11) Welding or hammering on the object to be suspended and working under the object are not allowed (when supported).

(12) The inspection or maintenance work must be performed after the power failure, and when the power failure sign is hung on the electric door. If it is necessary to work with electricity, it must be protected by safety measures and have a special person to take care of it.

(13) Don't throw things randomly from the car.

(14) Limit switches and interlock protection devices should be checked frequently.

(15) Touching the limit switch is not allowed as a method of stopping.

(16) When there is a problem with the lifting brake, lifting of heavy objects is not allowed.

(17) The suspended objects must not be allowed to operate over people or equipment.

(18) When welding a certain part of the crane, a special ground wire must be provided, and the ground wire of the fuselage is not allowed.

(19) When the hook is in the lower limit position, there must be more than two safety rope loops on the drum.

(20) Cranes are not allowed to collide with each other, let alone use one crane to push another crane to work.

(21) When lifting heavy objects, liquid metals, explosives, and dangerous goods, you must first slowly lift 100 ~ 200mm off the ground to test the reliability of the brake.

(22) The voltage of the lamps used for repair and inspection must be below 36V.

(23) All electrical equipment enclosures of bridge cranes should be grounded. If the trolley track is not welded on the main beam, welding ground measures should be taken. The ground wire can be galvanized flat iron with a cross-sectional area of more than 75mm2, bare copper wire of 10mm2, or galvanized round steel of more than 30mm2. There should be more than two grounding positions in the cab or crane body. The ground resistance between any point on the crane and the neutral point of the power supply should be less than 4.

(24) Do regular safety technical inspections and do pre-inspection and repair work.

In October 1937, the Japanese army invaded Shandong. Under the leadership of the Communist Party of China, anti-Japanese armed uprisings all over Shandong are surging. The First Division of the Eighth Route Army's 115th Division advanced into Shandong, fighting alongside local forces, and established and developed anti-Japanese base areas such as Luxi, Central Shandong, Jiaodong, and Qinghe. The military industries in these anti-Japanese base areas continued to grow and thrive in the anti-Japanese flames. Not only did they make a huge contribution to the elimination of the Japanese invaders, but they also established immortal feats for the victory of the liberation war. Among them, the Lunan Eighth Arsenal, which was born in 1943, is the predecessor of the Xugong Group. Twenty years later, New China s first 5-ton truck crane Q51 came out. At this point, China s crane manufacturing history was born from such a quench in the war. Refined factory.

Today, 73 years have passed, no matter in the raging war years or in the early days of the founding of the People's Republic of China, whether in the period of reform and opening up with blossoms or in the current era of China's economic boom, Xugong has always been responsible for the country and for the nation. Always daring to innovate and work tirelessly, creating one after another the pride of China's manufacturing industry only.

From 2002 to 2010, XCMG Heavy Industries completed the development of 14 large all-terrain crane series of large tonnage products ranging from 125 tons to 1200 tons. The 13 products that have been identified are all domestic firsts, reaching the international advanced level, and the product domestic market Occupancy rate is over 65% ^[1] .