L68C Mast Section For Tower Crane Masts

Products Specification

Type , Model: L68C Mast Section For Tower Crane Masts

Size: 2mx2mx3m 

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.

L68C Mast Section For Tower Crane Masts

Tower Crane Knowledge sharing：

What are the basic parameters of a tower crane? What are the criteria for basic parameters?

4. Work Speed
1 Rated lifting speed v. Refers to the recovery speed(m/min) of the fetch device at the rated speed of the lifting mechanism motor.
2 Tower crane(big car) operation speed VK. Refers to the running speed(m/min) of the tower crane at the rated speed of the large car running mechanism motor.
3 The speed of the car is VT. Refers to the speed(m/min) of the car running mechanism motor at the rated speed.
4 Variation speed VR. The uniform velocity of horizontal displacement of the rated load in a variable amplitude plane in a stable state. It is stipulated that at a height of 10m from the ground plane, when the wind speed is less than 3m/s, the tower is suspended on the horizontal river surface with an average speed(m/min) from the maximum, value to the minimum value.
5 lifting and stretching speed. When the lifting arm extends(or retracts), the speed at which its tip moves along the longitudinal core line of the arm frame(a/min).
Speed v. In the entry road driving condition, the tower is driven by its own energy at a maximum operating speed(km/h).

6 turning speed N. In the case where the rotating folding electric idea is rated speed, the local return angle speed(maximum amplitude, with additional load) of the tower crane is(r/min).

L68C Mast Section For Tower Crane Masts

5. Range L.
The horizontal distance between the vertical center line and the rotary center line when the tower is suspended in a horizontal field.
6. Heavy arm inclination.
In the lifting plane, the angle between the longitudinal central line and the degree line of the lifting arm is called the angle of the lifting arm, which is generally changed between 25 ° and 75 °.

What are the tower stop maintenance devices? What are their roles?
What are the tower stop maintenance devices? What do they do? Most construction units will use the same slogan, that is, "safe production," hence the name, development and construction security is the premise.

Tower lifting is a large starting mechanical equipment, its safety of course can not be underestimated.

In addition to strengthening the technical level of personnel operation, it is also necessary to strengthen the maintenance device of the tower crane. So, what are the tower stop maintenance devices? What are their roles?
1. Car broken rope cover device
It is used to prevent the car from breaking the traction rope and causing the car to lose control. In order to prevent the accident caused by the falling out of control of the car, a two-way car with variable amplitude broken rope protection device should be provided.
2. Tower hoist wire rope detaching device
It is used to prevent steel wire rope such as pulley, lifting roller and moving arm variable roller from leaving the pulley or roller. Both the pulley lifting drum and the movable arm variable width drum shall be provided with a steel wire rope detachable installation.

The gap between the name of the device and the outer edge of the pulley and the reel side plate shall not exceed 20 % of the diameter of the wire rope, and the surface in contact with the wire rope shall not be angular.

L68C Mast Section For Tower Crane Masts

3. Ceiling anti-detaching device
For the self-lifting tower machine, the top lifting device is removed from the tower body support or the connecting structure of the end of the oil cylinder during the abnormal joint and descending work hours.
4. Crash Prevention Device
It is used to prevent the car from falling out of the arm frame due to the failure of the variable wheel. The barrel-mounted tower machine should be equipped with a barrel-protected falling device. Even if the wheels take effect, the car may not fall out of the arm frame.
5. Buffer, stop device
The stop device must be installed at the end of the track path where the tower is walking and the car is changing. The buffer device is on the stop device or the tower machine(variable amplitude car).

When the tower machine collides with the stop device, the buffer should make the tower machine more stable without fierce impact.

L68C Mast Section For Tower Crane Masts

6. Windproof Anti-Slip device(rail clamp)
For tower machines running on the track, non-working wind Anti-Slip devices should be set up to prevent walking tower machines from sliding on their own in the event of strong winds, causing tipping.