WO2021168963A1

WO2021168963A1 - Novel boom installation method for luffing jib tower crane

Info

Publication number: WO2021168963A1
Application number: PCT/CN2020/081521
Authority: WO
Inventors: 王建军; 米成宏; 衣磊; 刘振; 郑怀鹏; 李海峰
Original assignee: 徐州建机工程机械有限公司
Priority date: 2020-02-27
Filing date: 2020-03-27
Publication date: 2021-09-02
Also published as: CN111186779A

Abstract

A boom installation method for a luffing jib tower crane. For a luffing jib tower crane, after the installation of a rotating platform (1), a counterweight (2), a tower top (3), and a luffing mechanism (4) is completed, a boom (5) is installed. The installation steps of the boom (5) comprise: reeving a luffing wire rope (6); installing the boom (5) and a hoist rope (7); and installing a boom pull rod pulley block (8).

Description

A New Type of Boom Installation Method for Boom Tower Crane

Technical field

The invention relates to a new type of boom installation method of a boom tower crane, and belongs to the technical field of boom tower cranes.

Background technique

The safety and speed of the installation of boom tower cranes for super high-rise buildings have always been the concern of the industry and customers. After the boom tower crane completes the turntable, counterweight, tower top and mechanism according to the requirements, the boom installation and the winding of the luffing wire rope can be carried out. For the installation of boom tower cranes for super high-rise buildings, most of the traditional installation methods are currently used both at home and abroad. The traditional method is to first install the boom on the turntable using a truck crane; secondly, use the lifting mechanism and auxiliary hemp After the rope is wound around the luffing wire rope, the truck crane can slowly release the hook until the boom luffing wire rope is stressed; then the hoisting mechanism wire rope is threaded around the jib fixed pulley block, and one end hangs down. Go to the ground, wind the hoisting wire rope over the hook pulley on the ground, then connect the wire rope sleeve to the anti-torsion mechanism, and finally use the auxiliary crane to lift the rope to the head of the boom, and connect the anti-torsion mechanism to the arm head Connect the wires, and then put away the hoisting wire rope. This method requires winding and hoisting steel wire ropes at high altitude, which has low safety, low installation efficiency and long time-consuming.

Summary of the invention

In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a new type of installation method for the boom of a boom tower crane, which can reduce safety risks, reduce high-altitude operations, and can easily pass through the steel wire rope, etc., with high installation efficiency , Safe and reliable, greatly saving time and cost.

The present invention is realized through the following technical solutions: a new type of boom installation method for the boom tower crane, the boom is installed after the boom tower crane completes the installation of the slewing platform, counterweight, tower top and luffing mechanism, and The feature is that the installation steps of the boom are:

Step 1: Thread the luffing wire rope;

Step 2: Install the boom and hoisting wire rope;

Step 3: Install the pulley block of the boom pull rod.

Said step 1: first use the lifting mechanism and auxiliary hemp rope to thread the luffing wire rope with the pulley block on the top of the tower and the pulley block of the boom pull rod, and then fix the pulley block of the boom pull rod on the top of the tower.

Said step 2: After the assembling of the boom structure is completed, the boom pull rod is assembled, the pin connecting end of the boom pull rod is connected with the top section pin of the boom, and the lift The pull rod of the boom is placed in the pull rod bracket of the boom and locked;

Start the hoisting mechanism to hoist the hoist, bring the hoisting wire rope output by the hoist to the ground enough length, turn off the hoisting hoist, and then pass the hoisting wire rope through the pulley along the crane arm according to the hoisting wire rope winding diagram, and wear it as required Around the hook, fix the rope end and various rope stops;

After assembling, use a truck crane to slowly hoist the jib, tilt the jib as a whole about 20o, connect the root of the jib and the slewing platform on the tower crane with a pin, and lock it with a safety pin.

Said step 3: After the truck crane installs the boom on the slewing platform, use an auxiliary mechanism or auxiliary crane to move the boom pull rod pulley block from the top of the tower and install it on the boom pull rod, and slowly loosen the truck crane Release and luffing mechanism work together until the boom pull rod and luffing wire rope are fully stressed, then the installation of the boom is completed.

The beneficial effects of the present invention are: 1) high safety, the process of hoisting wire rope threading and rope end fixing the boom head is completely completed on the ground, avoiding high-risk work such as dragging by the auxiliary crane at a height and the installation personnel walking back and forth; 2 ) The installation efficiency is high. The winding process of the hoisting wire rope is completely completed on the ground. Compared with high-altitude operations, it saves time greatly. The auxiliary mechanism is used to install the boom pull rod pulley block, which is quick to install and saves costs; 3) High humanized design, greatly reducing The work and working hours at height are improved, and the humanity is high.

Description of the drawings

The present invention will be further described below based on the drawings and embodiments.

Figure 1 is a schematic diagram of the structure of the luffing steel wire rope in step 1 of the present invention after being wound;

Figure 2 is a schematic diagram of the overall installation of the boom in step 2 of the present invention;

Figure 3 is a schematic diagram of the step 3 of the present invention connecting the auxiliary mechanism to the pulley block of the boom pull rod;

4 is a schematic diagram of the connection between the pull rod pulley block of the auxiliary mechanism traction rod and the rod in step 3 of the present invention;

Figure 5 is a schematic diagram of the completed installation structure of the present invention.

In the picture: 1. Slewing platform, 2. Counterweight, 3. Tower top, 4. Luffing mechanism, 5. Lifting boom, 6. Luffing wire rope, 7. Lifting wire rope, 8. Lifting arm pull rod pulley block, 9. Lifting mechanism, 10. Pulley group at the top of the tower, 11. Lifting arm rod, 12. Auxiliary mechanism.

Detailed ways

Figure 1 to Figure 5 shows a new type of boom installation method for the boom tower crane. After the boom tower crane has completed the installation of the slewing platform 1, the counterweight 2, the tower top 3 and the luffing mechanism 4, the boom is installed 5 installation, characterized in that: the installation steps of the boom 5 are:

Step 1: Thread the luffing wire rope 6;

Step 2: Install the boom 5 and the hoisting wire rope 7;

Step 3: Install the pulley block 8 of the boom pull rod.

Said step 1: First use the lifting mechanism 9 and the auxiliary hemp rope to thread the luffing wire rope 6 with the top pulley block 10 and the boom pull rod pulley block 8 on the top of the tower, and then fix the boom pull rod pulley block 8 on the top of the tower 3 on.

Said step 2: After the assembling of the structural parts of the boom 5 is completed, the boom tie rod 11 is assembled, and the pin connecting end of the boom tie rod 11 is connected with the top section pin of the boom 5 , And place the boom tie rod 11 in the tie rod bracket of the boom 5 and lock it;

Start the hoisting mechanism 9 to hoist the hoist, bring the hoisting wire rope 7 output by the hoisting to the ground enough length, turn off the hoisting hoist, and then pass the hoisting wire rope 7 along the hoisting arm 5 through the pulley according to the hoisting wire rope winding diagram , Thread the hooks as required, and fix the rope ends and various rope stops;

After assembling, use a truck crane to slowly hoist the boom 5, the boom 5 is tilted about 20o as a whole, and the boom root of the boom 5 is connected with the slewing platform 1 of the tower crane with a pin shaft and locked with a safety pin.

Said step 3: After the truck crane installs the boom 5 on the slewing platform 1, use the auxiliary mechanism 12 or auxiliary crane to move the boom pull rod pulley block 8 from the tower top 3 and install it on the boom pull rod 11. Slowly release the truck crane, and the luffing mechanism 4 works in cooperation until the boom pull rod 11 and the luffing wire rope 6 are fully stressed, and the installation of the boom 5 is completed.

Claims

A new type of boom installation method for the boom tower crane. The boom tower crane is installed after the slewing platform (1), counterweight (2), tower top (3) and luffing mechanism (4) are installed. 5) Installation, characterized in that: the installation steps of the boom (5) are:

Step 1: Thread the luffing wire rope (6);

Step 2: Install the boom (5) and the hoisting wire rope (7);

Step 3: Install the pulley block (8) of the boom pull rod.
A new type of boom installation method for a boom tower crane according to claim 1, characterized in that, the step 1: first use a lifting mechanism (9) and an auxiliary hemp rope to connect the luffing wire rope (6) It is threaded with the pulley block (10) at the top of the tower and the pulley block (8) of the boom pull rod, and then the pulley block (8) of the boom pull rod is fixed on the top of the tower (3).
A new type of boom installation method for a boom tower crane according to claim 1, characterized in that, the step 2: after the completion of the assembling of the boom (5) structural parts, then the boom pull rod (11) Assemble, connect the pin connecting end of the boom tie rod (11) with the top section pin of the boom (5), and place the boom tie rod (11) on the boom (5) ) Is locked in the lever bracket;

Start the hoisting mechanism (9) to hoist the hoist, bring the hoisting wire rope (7) output by the hoist to the ground enough length, turn off the hoisting hoist, and then lift the hoisting wire rope (7) according to the hoisting wire rope winding diagram The heavy arm (5) passes through the pulleys, passes through the hooks as required, and fixes the rope ends and various rope stops;

After assembling, use a truck crane to slowly hoist the boom (5). The boom (5) is tilted about 20° as a whole, and the boom root (5) is connected to the slewing platform (1) of the tower crane with a pin. Connect and lock with safety pin.
A new type of boom installation method for a boom tower crane according to claim 1, wherein the step 3: after the truck crane installs the boom (5) on the slewing platform (1), Use the auxiliary mechanism (12) or auxiliary crane to move the boom pull rod pulley block (8) from the top of the tower (3) and install it on the boom pull rod (11), slowly loosen the truck crane, and the luffing mechanism (4) ) Work together until the boom pull rod (11) and the luffing wire rope (6) are fully stressed, and then the installation of the boom (5) is completed.