L68B2 Mast Section Tower crane installation steps, installation, testing and commissioning, application for inspection and application for permit
A. installation steps of tower crane
L68B2 Mast Section：
http://www.towercranesupply.com/product/l68b2-mast-section-for-tower-crane-masts
Installation sequence and brief route identification: embedded bolt → installation of foundation section → installation of standard section and jacket of tower body → installation of rotating assembly → installation of rotating tower body and cab → installation of balance arm → hoisting of balance weight → installation of lifting arm → hoisting of remaining balance weight → installation of hook → installation of cable → commissioning → jacking → attachment to attachment position.
1. Use a level meter to test the foundation level, and the foundation levelness shall not exceed 1 / 1000; the concrete strength grade shall not be lower than.
2. Install the tower body bottom type (Foundation joint) on the concrete foundation, use the theodolite to calibrate the center line of the tower body to be vertical to the horizontal plane, only less than 2 pieces of opening pad iron between the foundation planes are allowed to adjust the tower body, and the verticality of the tower body shall be less than 3 / 1000.
3. Install foundation joint, reinforcement joint and standard joint on foundation embedded bolt and embedded seat. Install the cross, weights, and four braces.
4. Assemble the platform on the jacket on the ground, install the jacket escalator, stand on the platform and install the hydraulic jacking device, lift the climbing jacket, cover it outside the tower body foundation section and two standard sections, make the opening of the climbing jacket parallel to the direction of the building, place the jacking beam on the jacket on the footstep of the lowest foundation section, and make the one with oil cylinder face the tower with footstep One side in.
5. Install the upper and lower supports and rotary ring gear as a component on the ground, install the guide rail and hoist the rotary part.
6. Lift the transition section of the tower body, check the electrical equipment in the cab on the ground, and lift the cab.
7. Pin the last tie rod of the balance arm and the pulling plate of the lifting arm on the tower cap on the ground and lift the tower cap.
8. Assemble the balance arm, lifting mechanism, balance arm rail and pull rod on the ground. Lift the balance arm as a whole to connect it with the hinge point of the tower body, and install the connecting pin and the balance arm pull rod.
9. According to the installation instructions of the crane manufacturer, first lift the balance weight of the block, and fasten T and t to the balance arm.
10. Assemble the boom, pull rod, lifting trolley and lifting mechanism on the ground. Lift the boom as a whole, connect it with the hinge point of the tower body, and install the boom tie rod.
11. Lift the remaining balance weight blocks T and t.
12. Install the hook and cable by winding the lifting steel wire rope, connect the power supply, and test run the tower crane to meet the requirements.
L68B2 Mast Section：
http://www.towercranesupply.com/product/l68b2-mast-section-for-tower-crane-masts
13. The lifting and connection of tower crane shall be in accordance with the instructions of the manufacturer of tower crane or the safety technical operation procedures for mechanical equipment. According to the required height of the main structure construction, the continuous lifting or attachment shall be carried out and then the lifting shall be carried out to the required height. For the first time, the continuous jacking operation shall be carried out to m, and the reinforcing joint and standard joint shall be used. Carry out continuous jacking for the second time, work to the height of M, use the reinforcing section and standard section. Carry out continuous jacking for the third time, work to the height of M, use the reinforcing section and standard section.
14. The connecting structure shall use the high-strength bolt or pin shaft manufactured by the original factory. If the self-13 system is made, it shall have the test certificate of qualified quality, otherwise it shall not be used.
15. When connecting bolts, special torque wrench shall be used and tightened according to the assembly technical requirements.
B. installation, inspection and commissioning of tower crane
1. Comprehensively check whether the wiring of tower crane circuit is correct.
2. Comprehensively check whether the connection parts of the whole machine are correct and firm.
3. Under the condition of no wind, the perpendicularity of the tower axis to the foundation horizontal plane is detected, and the allowable difference is less than 3 / 1000. 4. The grounding resistance of lightning protection detection of tower body is less than Ω, meeting the requirements.
5. Test run the tower crane, and check whether the lifting of the main machine, slewing of the tower crane and traveling of the trolley are normal.
6. Commission all safety devices of tower crane, including torque, superelevation and luffing limiter, to achieve sensitivity, accuracy, safety and reliability; hook and winch drum are equipped with safety devices; climbing and shaving are equipped with retainers, etc.
C. tower crane application for inspection and application for permit
After the tower crane is installed and tested and debugged, the relevant departments of the company shall conduct preliminary inspection, and then apply to the special equipment department of the provincial and Municipal Bureau of quality and technical supervision for inspection and apply for the permit before it is put into use.
L68B2 Mast Section：
http://www.towercranesupply.com/product/l68b2-mast-section-for-tower-crane-masts
