SR68JR Basic Mast Tower Crane Masts

Products Specification

Type , Model:

SR68JR Basic Mast Tower Crane Masts

S68JR Base Masts

L68 Base Masts 

Size: 2mx2mx7.5m 

Materials: Q345B

Within: Pins, 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.

SR68JR Basic Mast Tower Crane Masts

S68JR Base Masts

L68 Base Masts 

Tower Crane Knowledge sharing：

Tower Hang Accessories-Installation Steps and Attention of Balance Arm
Among the many components of the tower crane, the role of the tower crane balance arm is mainly to provide reverse torque for the lifting arm, so as to ensure the balance of the body in the lifting process. It is one of the important tower crane accessories.
In most cases, the tower crane balance arm is a structure formed by welding the I-steel and corner steel groups. It is divided into two sections and connected by an earplate pin shaft. The tower crane balance arm is equipped with railings and aisles, and the tail is equipped with a working platform.

One end of the tower crane balance arm is connected to the rotating tower body with two special axles, and the other end is combined with a rigid pull rod connected to the tower cap. The tail is equipped with a balanced weight and lifting mechanism.

SR68JR Basic Mast Tower Crane Masts

S68JR Base Masts

L68 Base Masts 

The lifting mechanism itself has an independent base, with four pins. The shaft is balanced on the tower crane balance arm. The weight of the balance weight varies with the length of the boom.
In the process of installing the balance arm of the tower crane, the two balance arms should be assembled on the ground first, and the lifting mechanism, the electric control box, and the resistance essence should be put together.

The balance arm lever is mounted on the balance arm and should be well connected. The rotary mechanism is connected to the temporary power supply, and the above part of the rotary support is rotated to the position where the balance arm is easily installed.
Immediately thereafter, the tower crane construction personnel should hang up the balance arm(the balance arm is equipped with 4 mounting hanging ears), and use the pin shaft to fix the balance arm and the rotary tower body.

SR68JR Basic Mast Tower Crane Masts

S68JR Base Masts

L68 Base Masts 

The balance arm is gradually raised to the appropriate position, so that the balance arm's pull rod and the balance pipe's pull rod on the top of the tower are connected with the pin wheel, and the pin shaft is closed and the opening pin is opened.

Finally, the balance arm is slowly lowered and then hoisted to reinstall the balance on the back of the balance arm to the position closest to the top of the tower.

The characteristics of the inner climbing tower crane model, and what are its advantages?
After many years of development, tower cranes have been derived from a large number of varieties. According to the design form, they can be divided into self-ascending tower cranes, inner climbing tower cranes, flat head towers, movable arm towers, and fast mounted towers.

Hang and so on. Among them, the inner climbing tower is often used in high-rise building construction.
In general, the interior climbing tower crane has the advantages of large effective construction capacity, low manufacturing costs, low operating costs, and a small area of material storage for the safety Gaohe crane assembly. In the current Chinese standard classification, the tower crane model The standard is QT, The "Q" represents the "crane" and the "T" represents the "tower".

SR68JR Basic Mast Tower Crane Masts

S68JR Base Masts

L68 Base Masts 

Since the inner climbing tower crane mechanism is on the upper part, it is on the number. This type of tower crane is also classified as "QTZ"-that is, it is classified as "up and rising" tower.
Unlike common attached tower cranes, interior climbing tower cranes are installed inside the building(special openings such as elevator shafts or stairwells). The construction surface is full circle. This is particularly important in the construction of cities with high building density.

Because the horizontal tower lifts its heavy arm across the block, it is easy to collide with buildings, wires, water pipes, etc., causing accidents and causing danger.
In addition, some of the manufacturers produced such models are also independently classified as one type, in the code The prefix "QTP" is given. The digital code of the inner climbing tower crane is still the same as that of other models.

For example, QTP40(4908) indicates that "the nominal gravity moment is 400KN · M, the arm is 49 meters long, and the lifting arm is 49 meters high(the end lifting) is a climbing tower crane with a weight of 0,8T", of which, 40 refers to 40 torque units, 1 unit corresponds to 10KN · M, 49 in parentheses is arm length, and "08" refers to 0.8 tons.