Column crane special for movable arm type group tower

Abstract

The invention provides a special tower typed crane with a movable arm group tower, wherein, the tower body is connected by a fixed support arm 1, a standard section 2, and a jacking inner tower section 6; a hoisting inner tower section 9 is arranged on the jacking inner tower section; a rotary assembly 17 is arranged on the hoisting inner tower section 9 to articulate a boom 10, besides, a derricking mechanism 16 is also arranged on the hoisting inner tower section 9; wherein, a derricking cord 12 is connected between a windlass 19 and the boom to ensure that the boom can rotate in a scope of 15-89 degrees on a vertical plane; a hoisting mechanism 8 is arranged on the hoisting inner tower section; wherein, a hoisting cable is connected between the windlass and a hook pulley block 11 on the boom. When the crane is needed to be dismantled in the process of working in a form of inner attachment, the boom is boosted for an angle of 89 degree through the derricking mechanism to ensure the passing of the boom through a window at the top of the tower and ensure automatic falling from the middle of the iron tower; the hoisting mechanism 8 is positioned on the tower body, thus shortening the hoisting working trip to improve the construction efficiency; a hanger for dismantling the tower can also be arranged on the tower body to dismantle the crane conveniently; the crane has a simple and convenient construction, low construction cost and extensive application scope.

Description

Technical field [0001] The invention relates to the technical field of power transmission line construction. It is a tower crane with a boom that can rotate upwards by 89° in a vertical plane without a balance arm and a lifting mechanism on the tower body. It is particularly suitable for the construction of power transmission line towers . Background technique [0002] At present, the tower crane boom commonly used in the construction of transmission line towers in China can only reach an upward angle of 85° in the vertical plane and is equipped with a balance arm. During the construction of the internally attached tower, due to the boom, The balance arm cannot pass through the uppermost window of the iron tower, so it is complicated and difficult to dismantle the tower crane; in addition, the lifting mechanism of the conventional tower crane is usually located on the balance arm of the crane or on the ground, and placing the lifting mechanism on the ground will not only increase...

AI Technical Summary

Problems solved by technology

[0002] At present, the jib of the tower crane commonly used in the construction of domestic transmission line iron towers can only reach an upward angle of 85° in the vertical plane and is equipped with a balance arm. The balance arm cannot pass through the window at the top of the tower, so it is complicated and difficult to dismantle the tower crane; in addition, the lifting mechanism of a conventional tower crane is usually located on the balance arm of the crane or on the ground, and placing the lifting mechanism on the ground will not only increase the The amount of steel wire rope will also make the lifting work journey too long, thereby reducing the construction efficiency. The driver's cab is placed on the upper part of the crane, and the working status of the crane is monitored by the driver's eyesight, so the safety factor is not high in ensuring the driver's personal safety.

Therefore, when using this tower crane for tower construction, the construction is complicated, the safety factor is not high, the construction efficiency is low, and the cost is high.

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