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Method of using small tower crane to remove arm lever of large tower crane

A tower crane, large-scale technology, applied in cranes, transportation and packaging, etc., can solve the problems that it is difficult to dismantle tower cranes of different specifications smoothly, and there is no research on small tower cranes to dismantle large tower cranes. manipulation effect

Active Publication Date: 2020-08-14
CHINA NAT CHEM ENG THIRD CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are two main demolition modes at present, one is the self-dropping demolition of a single tower crane, and the other is to dismantle a small tower crane through a large tower crane. It is difficult to realize the smooth dismantling of two tower cranes with different specifications

Method used

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  • Method of using small tower crane to remove arm lever of large tower crane
  • Method of using small tower crane to remove arm lever of large tower crane
  • Method of using small tower crane to remove arm lever of large tower crane

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Embodiment

[0028] A method for dismantling the jib of a large tower with a small tower crane, wherein the small tower crane is tower crane A in the figure, with a height of 176.25m (47 knots), and the length of the jib is 47.5m; the large tower crane is tower crane B in the figure, with a height of 190.4m (32 knots). The specific steps are

[0029] Step 1. Extend the jib of tower crane A to 55m (the original boom length is 47.5m), and increase the jib of tower crane A to 55m, and after calculation, it is necessary to simultaneously add a 3t counterweight and a 10m section Standard arm 3. Add two 4915mm length tie rods. The specific operation is as follows:

[0030] ① if figure 1 As shown, check the braking system of the hoisting mechanism of tower crane B and the normal operation of each mechanism. After confirming that the construction requirements are met, the balance weight of tower crane A is removed by tower crane B (a 4t counterweight is reserved), and the balance weight of tow...

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Abstract

The invention discloses a method of using a small tower crane to remove an arm lever of a large tower crane. The method comprises the steps of increasing the length of the arm lever of a cargo boom, and enabling the small tower crane to be taller than the large tower crane by increasing the height of the small tower crane or reducing the height of the large tower crane; removing balancing weightsof the large tower while reserving one balancing weight by using the small tower crane; detaching a lifting hook and breath-changing ropes of the large tower crane; using the small tower crane to remove arm segments of a large pull rod, arm segments of the cargo boom, arm segments of a short pull rod and the short pull rod of the large tower crane one by one, and lowering the removed parts to theground; removing the last balancing weight by using the small tower crane; using the small tower crane to remove a rear arm segment and a pull rod of the balance arm of the large tower crane; and using the small tower crane to remove a front arm segment of the balance arm of the large tower crane. With the method of using the small tower crane to remove the arm lever of the large tower crane, thepurpose of using the small tower crane to remove the arm lever of the large tower crane is achieved, a novel manner of removing tower cranes is provided, it is beneficial for smoothly removing the tower cranes of different sizes on special working conditions, and the method is low in construction difficulty, easy to operate and high in safety.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a method for removing a large tower boom by using a small tower crane. Background technique [0002] Tower crane, also known as "tower crane", is the most commonly used lifting equipment on construction sites. It is used to lift steel bars, Raw materials for construction such as wood flute, concrete, steel pipe, etc. The tower crane mainly includes structures such as cap, tower body, balance arm, lifting arm, tie rod, luffing trolley, slewing tower body and cab. [0003] After the tower crane is finished, it needs to be dismantled. There are two main demolition modes at present, one is the self-dropping demolition of a single tower crane, and the other is to dismantle a small tower crane through a large tower crane. It is very difficult to realize the smooth dismantling of two tower cranes with different specifications. Contents of the invention [0004] The o...

Claims

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Application Information

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IPC IPC(8): B66C23/28B66C23/62
CPCB66C23/28B66C23/62B66C2700/03
Inventor 罗会田罗胜张云金
Owner CHINA NAT CHEM ENG THIRD CONSTR
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