SU433091A1 - TOWER CRANE FOR CONSTRUCTION AND INSTALLATION WORKS - Google Patents

Description

Known tower cranes for construction work, containing a stackable fixed tower, swinging boom with a cargo trolley mounted in the upper part of the tower, I. the main (.mounting) node of the hook suspension with rigid guides, auxiliary mechanical, mounted on the tower below the swivel head of the boom, and a swiveling transfer device mounted in the upper part of the lash under the auxiliary mechanism and made in the form of an annular chain with brackets that interact with mehanhanzm main lifting and auxiliary lifting mechanism. However, the difficulty of the orientation of the boom relative to the rotational-transfer device and setting it in a position coinciding with the direction of the brackets creates considerable difficulties in carrying out operations for transferring goods from the auxiliary lifting mechanism to the hook of the boom loading trolley, increasing the installation cycle time. The proposed krap differs in that the boom with the counterbalance console is fixedly mounted on the pivot element of the tower with a pivoting gear device mounted on it, oriented with respect to the boom by means of cyclically mounting brackets in the direction of the longitudinal axis of the boom, on the counterweight weights. This ensures shorter assembly times. FIG. 1 shows the proposed tower crane, the general view; in fig. 2 - upper turning section of the tower; in fig. 3 is a diagram of the boom, slewing gear and auxiliary pod.ma control mechanism. The crane contains a stackable tower 1, undercarriage 2 or the foundation, if the crane is permanently installed. The tower is made with a rotary element 3 installed rotatably around a vertical axis by means of a turnover device 4, for example, of the type of thrust roller or ball bearing and of a rotating rotational pattern 5 with a device that fixes a given angle of rotation. On the pivot element 3, the boom 6 is fixedly mounted, carrying a cargo trolley 7 of the main lift mechanism moving along the boom with a hook suspension 8 equipped, for example, with rigid guides

9 and a swivel hook 10. On the side opposite to the boom, on the swivel element 3, there is mounted an anti-spring console 11 with a load trolley 12 mounted on it with a hook suspension 13 of the auxiliary lifting mechanism.

On the same pivot element 3 of the tower under the boom, a pivoting and transfer device 4 is rotatably mounted around the vertical axis of the section by means of a pivoting device 15 with a drive 16, made in the form of an annular frame with brackets 17 diametrically located on it for suspension of the traverse 18 with a load 19.

Carrying out a cyclical rotation of the rotary transfer gear with periodic fixation of the position of the brackets, is installed; one of the brackets is cast under the counterweight arm. By means of an auxiliary lift, the load is lifted from a vehicle that delivers the load to the lifting point, and by moving it with the help of a load trolley on the counterweight console but towards the tower, it is transferred to the bracket mounted under the console.

For the rpy: ia boom of the previous cycle to the site of its installation, the swivel element of the tower, together with the mounted boom and the swiveling transmission device, turns to the required angle. Then, the pivotal transfer device is rotated relative to the pivot element of the tower by the corresponding angle, and the bracket with the load is set

under the boom for transferring the load from the bracket to the hook.

The Krukov suspension of the main lift mechanism removes the load from the bracket and delivers it to the mounting location. The cycle is repeated. However, due to the fact that the boom, the auxiliary lift mechanism and the pivotal transfer device are mounted on the pivot element of the tower when the boom is turned with the load trolley delivering the load to the installation site, the orientation of the pivotal transfer bracket arms relative to the boom axis is maintained.

The subject of the invention is the Tower crane for civil and erection works, which includes a stackable fixed tower, a swing arm with a counterweight console, a mounting lift mechanism, an auxiliary lifting mechanism, and a swing-transfer device with diametrically arranged brackets that interact with the mounting and auxiliary lifting mechanisms. , characterized in that, in order to shorten the cycle time of the assembly work, the boom with the counterbalanced console is fixedly mounted on the swivel element There are e towers with a pivotal transfer device mounted on it, oriented relative to the boom by means of crocodiles rotating cyclically in the direction of the longitudinal axis of the boom, with the auxiliary lifting mechanism placed on the console of the counterweight.

FIG. one