H205B Mast Section YONGMAO Tower Crane

Products Specification

Type , Model: H205B Mast Section YONGMAO Tower Crane

Size: 2.3mx2.3mx6m 

Use for : YONGMAO Tower Crane (H205A H205B)

Materials: Q345B

Within bolts, Ladder, Platform

Process: Blasting derusting, 

Painting:  Under painting , Middle painting, Surface painting.

Our factory produce and supply almost all famous brand tower crane :Mast section, Anchor Frame, Fixing angle ,Adaptor and so on as good quality and price.

H205B Mast Section YONGMAO Tower Crane

Tower Crane Knowledge sharing：

Three point operation technique of standard bolt connection of tower crane and points for attention in inspection

First, after the initial installation of the tower crane should be operated for 2 shifts, the fastening condition of all the connecting bolts should be checked once, and in the next half month or so, and the key inspection of the bolts at the above parts should be conducted after the lifting of the tower.

It is also necessary to rotate the position of the tower arm during inspection. The bolts being checked are directly below the position of the balance arm, so that it is credible and effective to check whether the bolts are tightened.

Second, the tower crane work, a set of connection when the same joint pre-tightening force is too large, the deputy of axial force of bolt connection can vary widely, big bolt pretightening under heavy load for a long time, easy to produce fatigue fracture, were also found in the actual examination eight foundation bolt of a fracture.

Belong to this phenomenon. Pay attention to the consistency of pre-tightening torque during installation, and in field operation, due to the different strength of workers.

 It is very likely that the pre-tightening torque of the four column bolts is different, the use of torque wrench can be well controlled, to say the least, should also be checked and adjusted by experienced foreman fastening.

H205B Mast Section YONGMAO Tower Crane

Third, when the tower crane is transferred to the field, all the connecting bolts of the tower body shall be inspected, derusted and lubricated in detail, and any abnormality such as crack, wear, severe corrosion, overall or local plastic deformation shall be replaced. It is recommended that it should not be used more than twice to avoid fatigue damage.

This requirement, existing tower crane probably majority did not achieve. If discover when be short of, be short of, unfavorable and proper processing is made, because building unit is opposite, the processing quality of high-strength bolt, material is not easy control, appropriate buys to former tower crane manufacturing plant had better, high-strength bolt should manufacturer mark, grade mark.

choose a suitable installation site

Our company is specialized in tower crane design, production and sales of professional companies, with professional tower crane technology, tower crane knowledge. In this paper, how to choose a suitable installation site for tower crane

First, check whether the subgrade and track laying meet the requirements, bury the ground anchor, and determine the location of the ground anchor according to the rotation and lifting direction of the tower and the total height of the tower.

Secondly, the main anchor and auxiliary anchor. The main ground anchor is the key to tower uplift, all the load of rotating lifting tower is borne by the main ground anchor, and in the tower demolition, still need to use the ground anchor.

 So it must be carefully buried, to achieve the required bearing capacity, and make anti-corrosion treatment.

H205B Mast Section YONGMAO Tower Crane

The center of the anchor wheel must be consistent with the center of the gauge, so as to ensure that the tower is always rotated along the center surface of the gauge in the lifting process, without eccentricity.

 So as to balance the force on the gate frame. The function of the auxiliary ground anchor is to loosen the wire rope with rotation when the tower is lifted.

This ground anchor is the anchor point of the insurance wire rope to prevent the tower from collapsing in the opposite direction during rotation

Regulations on safety management of personnel, equipment and operation during operation of tower crane

According to the summary of the causes of tower crane accidents in recent years, it is found that the proportion of tower crane accidents in operation is the highest

Therefore, it is an effective measure to reduce the accident of tower crane to do well the safety management regulations of personnel, equipment and operation in the operation of tower crane.

H205B Mast Section YONGMAO Tower Crane

1. the tower crane driver to keep energy, focus, it is forbidden to listen to the radio, MP3 player, it is forbidden to drink and go to work, keep calm state of mind, don't drive of quarrelling, running smoothly

It is forbidden to fast and slow, closely monitored hanging chains, the whole process of lifting, running, whereabouts, unsafe factors may not be on the hook hoisting, shall not leave the operating handle hands, prohibit irrelevant personnel into the cab.

2. The cab shall only follow the command of the designated person. If the signal intention is unclear or the command violates the rules and regulations, the driver shall not hang the crane.

3. Do not hang heavy objects in the air after work or during the outage. When the machine is stopped, the hoisting boom must be turned downwind, the trolley should be stopped at the root of the hoisting boom, the hook should be lifted to the height limit, and the power supply should be cut off before leaving.

4. The hydraulic system, electrical protection system, braking system of structural parts and safety limiter system that have been adjusted by special personnel are not allowed to be changed at will by others.

The handover record and equipment operation record shall be filled out exactly in each shift.

5. In case of rainstorm, fog and wind exceeding the control torque of tower crane turning, the operation must be stopped. Sufficient lighting equipment should be provided at night.

6. It is strictly prohibited to enlarge and shorten the torque and height limiter, and strictly implement the provisions of no lifting for ten

7. It is strictly prohibited to operate the connection beyond grade. When changing direction, first move the handle to the zero position, and then reverse operation can be carried out after the positive operation stops.

8. In case of abnormal sound, motor heating or other faults, lower the weight and stop the machine for inspection. The lifting boom must be turned downwind.

9. When two or more tower cranes are working in the same area, they should pay attention to each other's position. The vertical direction and horizontal height difference protection should be more than 2 meters away from each other.

H205B Mast Section YONGMAO Tower Crane

10. When the tower crane is set near the high-tension line, the front and rear arms and the steel wire shall be kept at a distance of 2-6 meters in the horizontal and vertical directions.

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