Supplementary portal frame device of dismantling construction tower crane counterweight
The utility model relates to a construction engineering technique, concretely relates to tower crane demolishs operation construction technology.
In the construction of large single buildings, according to the arrangement requirement of construction organization, a large machine generally considers that a plurality of tower cranes are arranged in a building during arrangement, but due to the main structure, a truck crane cannot enter an operation surface when the tower cranes are dismantled, or the cost for entering the operation surface is too high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an auxiliary portal frame device for dismantling the counterweight of a construction tower crane is provided, and the counterweight of the construction tower crane is conveniently dismantled.
In order to solve the technical problem, the utility model adopts the following technical scheme: the utility model provides an supplementary portal frame device of dismantling balanced heavy of construction tower crane, is including setting up the portal frame in the building roofing, the portal frame includes two stands and supports in the frame top hoist and mount system on two stand tops, frame top hoist and mount system includes the spandrel girder that both ends are connected with two stand tops respectively, with spandrel girder swing joint's slip dolly and with the chain block that the slip dolly is connected, utilize chain block to hoist boom upper chord, at the middle part and the top of every stand, respectively draw a wire rope from two mutually perpendicular directions, wire rope is fixed in the roofing through the crab-bolt and is taut by euphroe, still includes that the balanced heavy removes the support and accepts the balanced heavy of dismantling and shifts the hydraulic pressure car of stacking, the balanced heavy hoisting mechanism who installs the balanced heavy of placing in hydraulic pressure car that will demolish on the support is removed to the balanced heavy.
Optionally, the upright column includes a bottom pillar and a plurality of layers of standard sections connected above the bottom pillar, and the bottom pillar is fixed to the roof girder through a connecting bolt.
Optionally, the stand is formed by welding an equilateral angle steel stand at four rectangular corners, and a cross brace and an inclined brace which are connected with the equilateral angle steel stand.
Optionally, the hoisting mechanism comprises a winch, a fixed pulley, a movable pulley and a hand-operated hoist, a steel wire rope led out from the winch passes through the fixed pulley and the movable pulley, and the movable pulley is connected with the hand-operated hoist.
Optionally, a stand column hanging rod is arranged on the side face of the stand column, a movable pulley, a pull rope connected with the movable pulley and a chain block are mounted on the stand column hanging rod, and the bearing beam is hung through the chain block.
The above technical scheme is adopted in the utility model, according to the field condition, adopt the portal frame to assist and demolish the tower crane counterweight, convenient operation, safe and reliable can arrange according to on-the-spot actual conditions is nimble, has solved large-scale monomer building engineering crowd tower and has demolishd a difficult problem, has obtained good benefit in the aspect of security, the economic type.
The specific technical solution and the advantages of the present invention will be described in detail in the following detailed description with reference to the accompanying drawings.
The invention will be further described with reference to the accompanying drawings and specific embodiments:
fig. 1 is a schematic structural view of the portal frame of the present invention;
FIG. 2 is a schematic structural view of the column hanger of the present invention;
FIG. 3 is a schematic view of the matching structure of the gantry and the tower crane boom of the present invention;
FIG. 4 is a schematic view of the structure in the direction A of FIG. 3;
fig. 5 is a schematic view of counterweight removal.
As shown in fig. 1 to 5, a portal frame device for assisting in dismantling a counterweight of a construction tower crane comprises a portal frame 1 erected on a building roof 2, the portal frame comprises two upright posts 11 and a frame top hoisting system supported at the top ends of the two upright posts, the frame top hoisting system comprises a bearing beam 12, two ends of which are respectively connected with the top ends of two upright posts, a sliding trolley movably connected with the bearing beam and a chain block 14 connected with the sliding trolley 13, the chain block on the bearing beam of the portal frame is utilized to hoist the upper chord of the hoisting arm, a steel wire rope 15 is respectively pulled from two directions which are vertical to each other at the middle part and the top part of each upright post, the steel wire rope is fixed on the roof through anchor bolts and tensioned by a rope tightening device, and also comprises a counterweight dismantling bracket 4 and a hydraulic vehicle 6 for receiving the dismantled counterweight 52 and transferring the piled counterweight, the counterweight dismantling support is provided with a hoisting mechanism for placing the dismantled counterweight in the hydraulic vehicle.
In order to install the portal frame, referring to fig. 2, the side of the upright is provided with an upright hanger rod 3, the upright hanger rod is provided with a movable pulley 31, a pull rope 33 connected with the movable pulley and a chain block 32, the chain blocks on the two upright hanger rods on the side are utilized to lift the bearing beam, two sliding trolleys are installed on the bearing beam, and then the chain blocks are installed on each sliding trolley on the bearing beam. At the position of 6m and 12m high of each upright post, a phi 14 steel wire rope is respectively pulled from two mutually vertical directions, two wire ropes at the same height and in the same plane are tensioned by two rope tighteners, the two steel wire ropes are just stressed at the same time, and the perpendicularity of the upright posts and the perpendicularity tolerance 4/1000 are observed.
The upright column comprises a bottom column and a plurality of layers of standard sections connected above the bottom column, and the bottom column is fixed with the roof girder 21 through a connecting bolt 22. The upright post is formed by welding an equilateral angle steel upright post with four rectangular corners, a cross brace and an inclined brace which are connected with the equilateral angle steel upright post.
Referring to fig. 5, the hoisting mechanism includes a winch 41, a fixed pulley 42, a movable pulley 43 and a hand hoist, wherein a steel wire rope led out from the winch passes through the fixed pulley and the movable pulley, and the movable pulley is connected with the hand hoist.
Referring to fig. 3 to 5, the process of removing the counterweight is as follows:
firstly, the upper chord of the lifting arm is hoisted by a chain block on a bearing beam of the portal frame (until the upper chord is just stressed). Then welding a balance weight at the tail end of the balance arm to remove the bracket; the counter weights are flatly placed on the roof one by one through a 3t movable pulley and a hydraulic vehicle on the roof by utilizing a lifting mechanism of the counter weight device, and are transferred in time and strictly forbidden to be stacked in a centralized mode.
The utility model discloses a through at on-spot spelling of structure roofing, installation portal frame to and the balanced heavy instrument such as demolising support, hydraulic pressure dolly, chain block, the tower crane is demolishd in the assistance, solves because the mobile crane can't get into the site operation difficult problem, and safety, economy, construction are convenient.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the above specific embodiments. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.