the main points when using the tower crane standard
Tower crane is the abbreviation of "tower crane" and is widely used in construction and transportation. It is mainly used for lifting equipment and materials. In Chinese national standards, the model standard for tower cranes is QT, where "Q" represents "crane" and "T" represents "tower". Tower hoist is a large mechanical equipment, widely used, but also dangerous, tower hoist specification when used, when pay attention to what points?
Tower crane models can be divided into the following types:
1, upper rotary type: QT, upper rotary tower crane;
2, upward rotation self-rising type: QTZ, upward rotation self-rising tower crane;
3, down rotary type: QTX, down rotary tower crane;
4, down rotation self-lifting type: QTS, down rotation self-lifting tower crane;
5, fast installation type: QTK, fast installation tower crane;
6, fixed: QTG, fixed tower crane;
7, climb type: QTP, climb tower crane;
8, tire type: QTL, tire tower crane;
9, car type: QTQ, car tower crane;
10, crawler type: QTU, crawler tower crane.
When using the tower crane specification, pay attention to the following points:
1, the tower crane driver and signal personnel must be specially trained and qualified for the job.
The driver shall be familiar with the mechanical properties and instructions of the tower crane and comply with the requirements in the instructions.
3, the driver can start the operation with a clear signal from the commander. Before the action, ring the bell first. If the signal is found to be unclear, do not operate at will.
The tower hoist shall have two drivers per shift, one driver shall operate, and the other driver shall be supervised on the ground to prevent accidents.
5, when hanging a good wire rope, lifting the hook wire rope tension, the operator must immediately stay away from the heavy lifting, not to stand under the lifting arm, to prevent heavy falling, arm rod collapse hurt people.
6, lifting at full load or near full load, it is forbidden to land the arm bar or perform two actions at the same time.
7, lifting heavy objects is strictly forbidden to fall freely, heavy objects fall using handbrake or foot brake control slowly down.
8, when the lifting arm changes the elevation angle, it must be empty and can not do other actions at the same time.
9, is prohibited from making fast rotation, prevent the rotation too fast causing the object to be in position and the weight centrifugal force is too large danger.
10, in the operation must listen to the signal of the commander. When the signal is unknown or may cause an accident, the operation should be suspended.
No one can stop and walk under the heavy arm when the tower is lifted.
It is of great significance for safety, efficiency and cost to do a good job in the management of Crane fittings
In order to ensure that problems such as mechanical problems encountered in tower lifting operations can be quickly solved, so each construction unit often leaves a large number of spare tower lifting accessories. Therefore, It is also very important for safety production, efficiency and cost saving to manage these crane parts well.
At present, the design and manufacture of Tower cranes have mostly adopted a modular approach and combined development. The so-called combination type is to use the structure of the tower body as the core, and to decompose the tower body into several parts according to its structure and functional characteristics, and according to the requirements of serialization and generalization.
After following the principle of modular system, each part is divided into several modules. According to the requirement of parameters, suitable modules are selected to form tower hoists with different technical characteristics to meet the specific needs of construction. The implementation of the modular tower crane will help speed up the development of tower crane products, save product development costs, and better customer service.
In this way, it brings convenience and particularity to the management of tower crane fittings. Convenience refers to the modular design that allows certain accessories to be used between different models and specifications of Tower cranes. The particularity is that some special tower crane accessories must be properly kept for preparation.
In addition, when the tower crane needs to replace accessories, it is particularly important to do a good job of disassembly and assembly. Safety accidents caused by improper disassembly and poor installation quality occupy a large proportion.
Tower lifting and disassembly must have qualified disassembly units to carry out operations, and within the scope of qualification to engage in installation and disassembly. The disassembly personnel must go through specialized business training, have a certain degree of disassembly experience and permit to take office.
At the same time, all types of workers must be complete, their positions are clear, and they must perform their duties and obey the unified command.
It is worth mentioning that in order to ensure the normal and safe use of Tower hoists, we must make it mandatory for tower hoists to be equipped with specified safety devices. Mainly: gravity moment limiter, starting weight limiter, height limiter, amplitude limiter, rotary limiter, hook safety device, reel safety device, wind speed meter, wire rope slotting insurance, car breakrope device, car anti-shaft device and buffer Wait.
These safety devices ensure that they are sound and sensitive and reliable. If damage is found in use, it should be repaired and replaced in a timely manner. It must not be removed or arbitrarily adjusted.
