Fixing Angles 290HC Mast Liebherr

Products Specification

Type , Model: Fixing Angles 290HC Mast Liebherr

Size: 1.8M

Use for : 120HC , 132HC, 154HC  Mast Liebherr,1.8mx1.8mx2.5m

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.

Fixing Angles 290HC Mast Liebherr

Tower Crane Knowledge sharing：

Safety measures, inspection items and operation sequence for tower crane removal

The demolition process of tower crane is a stage of frequent tower crane accidents. Safety measures and inspection items for tower crane demolition must be well done, and construction must be carried out in accordance with the strict order of tower crane removal.

1. Warning lines shall be set up in the disassembly area, marked with obvious signs and under the supervision of special personnel.

2. Check whether the performance of the removed tower crane is good, no fatigue damage to the metal structure, no weld cracking, welding, no serious corrosion, and no loosening of the bolts of the rotary support.

The steel wire rope, pulley block, electrical equipment, jacking mechanism, lifting rotary mechanism, etc., should be carefully inspected before disassembly, found problems need to be qualified rectification before the operation.

Remove the standard section of tower crane and the attached wall frame

(1) check whether the regulating wheel on the jacket is pressed on the outer surface of the main chord of the tower body, if the clearance is too large, need to be adjusted to 3 ~ 5mm.

Hang up the counterweight, remove the high strength bolt connecting the lower support with the standard section and the standard section, start the jacking oil pump, make the standard section out of the tower, then slowly push to the external end of the introduced beam, then start the oil pump to slow down, carefully observe the movement of the casing frame relative to the jacking beam and the tower body, and stop the operation immediately if there is any abnormal situation.

Fixing Angles 290HC Mast Liebherr

Attention in the process of ascending and descending is strictly prohibited tower crane rotation.

(2) start the oil pump to make the whole lower support fall into the tower, and bolt fastening fixed, remove the counterweight and beam on the standard section, and then repeat the above operation, until it is attached to the wall.

Note that the jacking rod must be put into the hanging ears on both sides at this time, and check whether the climbing claw affects the descending.

(3) according to the regulations and construction requirements to remove the attached wall frame.

(4) repeat the above operations until the specified operation height, stop the work of the standard section.

(5) cooperate with the standard section and the transfer of wall frame. Note that there should be enough space for the demolition operation.

4. Dismantle the hoisting wire rope and the variable amplitude wire rope, fix the trolley in the predetermined position, pull the hoisting wire rope to the big arm pull-rod pulley block for fixing, remove part of the balance weight, at this time, only the third 2t balance weight should be left.

Remove the boom. Park the big boom at the designated position, and the car crane at the center of the big boom. The center of the big boom is 17.5m away from the root of the big boom, and the distance between the two wire rope lifting points is not less than 6m.

Slowly lifting the rod is in a state of relaxation, dismantle the tie pin, the hoisting wire rope tension rod, smooth down to the specified location, unload large arm connected to the bearing pin shaft, and the roots in the big arm and arm head department had a narrow squeak,

prevent big arms shaking, slow down big arm, and decline hoisting wire rope, synchronize the tie rod with large arm down, until the arm can set the location specified. Then lower the pull rod, disassemble the big arm and pull rod, and transfer.

Remove the cab. Check the electrical wiring of the cab, remove the electrical and pin shaft of the cab, and lift it to the designated position with the truck crane.

Remove the balance arm. Stop the truck crane at the center of the balance arm, remove the left piece of balance weight, set the lifting rope, slowly rise to a certain height, loosen the balance rod, remove the balance arm and the upper support pin shaft, tie the safety rope, slowly fall to the designated position.

Remove the tower cap. Mobile truck crane, tie the lifting rope, remove the connecting pin shaft, slowly lift, smoothly put in the designated position.

Remove the upper and lower support, slewing support and slewing mechanism, loosen the fixing bolt of slewing mechanism, and slowly lift the truck crane to the fixed position. Loosen the connecting bolt between the support and the socket, tie the lifting cable, lift slowly, and put the upper and lower support and the slewing support in the designated position.

Remove the casing holder. Remove the oil tank, jacking mechanism and enclosure railing on the casing frame, fix the jacking oil cylinder, slowly lift the whole casing frame。

Making the casing frame rise slowly along the standard section, and the regulating wheel should rotate evenly until the whole casing frame is separated from the standard section, and then put it in the designated position.

Remove remaining standard section and foundation section.

Fixing Angles 290HC Mast Liebherr

Safety technology for tower crane adhesion construction: construction requirements, techniques and matters needing attention

In this paper, the tower crane construction machinery plant (http://www.fx68.net) will focus on the construction of the tower crane adhesion safety technology, respectively from the construction requirements, construction process, construction safety considerations, etc., discussed in detail.

Requirements for construction of tower crane adhesion

1. When the tower crane is attached to the building, its mechanical strength must meet the attachment requirements of the tower crane.

2. In case of gale force 6 or above, it is forbidden to install or remove the anchoring device.

Construction technology and process of tower crane attachment:

Fixing Angles 290HC Mast Liebherr

1. According to the total construction height of the project, as well as the structural characteristics of the building and the construction schedule, the following attachment scheme is arranged as follows: two anchors are arranged。

the distance between the attachment supports is 1500m, and Angle steel attachment rod system and the corresponding attachment technology are adopted.

2. When installing the attachment frame and the attachment bar, the theodolite shall be used for observation, and the perpendicularity of the tower shall be ensured by adjusting the attachment bar.

3. The attachment frame shall be set as far as possible at the joint of the standard section of the tower crane. The tower body shall be clamped tightly and diagonal brace shall be set for reinforcement.

4. with the tower body section of the jacking and assembly of the additional anchor device, should be attached to the building in time. The free height of the tower above the anchorage device shall not exceed 40m in general.

5. When multiple anchorage devices are needed for the construction of ultra-high buildings, the lower anchorage device can be transferred to the upper part for use.

However, the distance between the first anchorage device and the tower crane foundation shall not exceed 50m. The arrangement of each anchorage device shall conform to the relevant provisions in the operation instruction.

6. the placement of attachment support must be reinforced and appropriately enhance the mark of concrete. When attaching, the structural strength of the attachment support must reach the designed strength.

The attached support is provided on the cast-in-place concrete inner wall panel. The support and reinforcement must be set between the wall panel and the wall panel .Attachment support should be fixed firmly, and the gap between it and the building structure should be embedded tightly.

Safety precautions for attached construction of tower crane

Fixing Angles 290HC Mast Liebherr

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