K40 Mast Section For Tower Crane Masts

Products Specification

Type , Model: K40 Mast Section For Tower Crane Masts

Size: 1.6mx1.6mx5m 

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.

K40 Mast Section For Tower Crane Masts

Tower Crane Knowledge sharing：

Debugging steps of lifting height limiter in tower
It can produce a variety of tower crane model products, tower crane equipment and accessories. Has to do the tower hanging standard assembly, can process any manufacturer's standard festival, quality and cheap.
Tower crane is a large mechanical equipment, its safety can not be underestimated. Therefore, the security equipment of the tower crane is indispensable and must be in good condition. The following explanation explains the debugging steps of the tower lifting the lifting height limiter.

K40 Mast Section For Tower Crane Masts

1. The lifting height limiter adjustment is carried out under the empty load of the tower crane, and the micro-switch is pressed separately. Verify the sensitivity and reliability of the two gear lifting limit microswitches. When pressing the micro-switch corresponding to the cam, the power of the fast-rising work block is cut off, and the lifting hook can only rise at a low speed. When pressing the micro-switch corresponding to the cam, the rising power supply is cut off, and the lifting hook can only fall and can not rise.
2. When the hook is raised, the vertical distance from the top to the bottom of the car is 1.3 meters or 1 meter, and the mobilization shaft is 2Z, so that the cam 2T moves to make the micro-switch 2WK instantaneous change and tighten the nut.

K40 Mast Section For Tower Crane Masts

3. Raise the lifting hook at a low speed so that the vertical distance from the top to the bottom of the car is 1 meter or 0.7 meters, and the mobilization shaft is 1Z, so that the cam 1T moves to make the microswitch 1WK instantaneous switch, tightening the nut.

4. Multiple blank load verification and correction of the height limit of the two gears.
5. The height limiter should be readjusted when the doubling rate of the hook pulley is changed.

Taking QTZ63 tower crane as an example, the debugging method of the moment limiter is introduced.

Below, take the example of the lifting moment limiter applied on the QTZ63 tower crane to explain the debugging method of the torque limiter.
1. When the hook is empty, use a screwdriver to distinguish between the stroke switches 1, 2, and 3 to ensure that the three switches are sensitive and reliable.
1 The stroke switch 1 is a limit switch with a fixed torque of 80 %, press the switch, and the buzzer alarm on the linkage table.
2 Trip switches 2 and 3 are the limit switches for extra torque. Press down the switch. The power supply for the lifting mechanism to pick up and change the amplitude mechanism is blocked. The lifting hook can only land, and the variable car can only run backwards. And the linkage table instigates the light to shine, beeping continuously alarm.

K40 Mast Section For Tower Crane Masts

2. When adjusting the hook takes a fourfold rate and a single breaking height of 40 meters or less, lifting the weight slightly from the ground, the car may run.
3. When the working range is 50 meters long, the car runs to a 25-meter range, and the lifting component is 2290KG. After the lifting weight is lifted from the tower, the adjustment and adjustment of the adjustment screw 4 to the stroke switch 1 corresponds to the stroke switch 1. Change the connection and tighten the corresponding adjustment nut 7.
4. According to the constant amplitude variable code adjustment moment limiter, adjust the stroke switch 2.
5. Adjust the moment limiter to adjust the stroke switch 3 according to the constant amplitude variation.