P20A Bases Fixing Angle Tower Crane

Products Specification

Type , Model: P20A Bases Fixing Angle Tower Crane

Size: 2M

Use for : L66A3 ,L 68A1, L68A3, L68B1, L68B2 , L68B3  mast section , P20A  R20A, P21A  R21A  ,2m L type mast

Materials: Q345B

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.

P20A Bases Fixing Angle Tower Crane

Tower Crane Knowledge sharing：

How to install and lift the tower crane as a whole

How to install the tower crane as a whole? Taking the QTZ80 tower crane as an example, this paper introduces the method of lifting the tower as a whole.

This method is applicable to the situation that there is no large hoisting equipment and proper construction site.

P20A Bases Fixing Angle Tower Crane

1. Preparation

Check whether the roadbed and track laying meet the requirements. The position of the ground anchor is determined according to the rotation and lifting direction of the vertical tower and the total height of the tower.

The ground anchor divides the main ground anchor and the auxiliary ground anchor. The main ground anchor is the key for the tower body to be erected. All the load of lifting the tower body is borne by the main ground anchor.

The center of the ground anchor wheel must be consistent with the center of the gauge to ensure that the tower body always rotates along the center surface of the gauge during lifting without eccentricity so as to balance the force of 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 safety wire rope to prevent the tower from falling down in the opposite direction during the rotation process.

P20A Bases Fixing Angle Tower Crane

2. Overall installation

According to the procedure required in the manual, install the walking mechanism, door frame and iron weight lifting arm on the support shaft of the door frame platform

Wear wire rope

The length of the hoist wire rope from the cab to the pulley block of the tower cap is finally fixed on the crane head, and the distance between the two pulley blocks shall be determined by calculation.

Before you erect the tower

The controller, limit switch and other electrical equipment shall be inspected. The movable control panel in the control room shall be removed and mounted on the outdoor bracket for easy operation when the tower is erected. Clamp the rail tongs and wedge the anti-skid wedge under the running wheel.

P20A Bases Fixing Angle Tower Crane

In order to strengthen the stiffness of the door frame can be tied on both sides of the frame cross brace. Before starting, strict division of duties and command and contact signals shall be stipulated for each post.

The inspection of the main ground anchor should be undertaken by experienced hoisting personnel. When any abnormal phenomenon such as looseness is found, the anchor should be stopped immediately and measures can be taken to increase the weight on the ground anchor.

Start the winch machine to make the tower body leave the battlements about 200mm and immediately stop the machine to check the stress condition of all parts.

Erect the tower

After checking and confirming that the situation is normal, continue to start the winch, and make the steel wire rope of the auxiliary ground anchor standing on the tower body become loose.

The towers are set up to 60  after hoist will gradually slow down, along with the change of the tower center of gravity when the tower center of gravity near the installation hinge wire rope hoist to stop working with mobile cranes taut insurance on the tower weight fall gently on the pad in advance good timbers.

P20A Bases Fixing Angle Tower Crane

After the tower body is stabilized, tighten the safety wire rope to make the tower body slightly slanting, then remove the cushion layer and then loosen the safety wire rope to put the tower body in a stable position.