CN104370217B - Portal crane for paving bridge decks - Google Patents

Abstract

The invention provides a bridge deck laying gantry crane, which includes a supporting traveling gantry, a bridge crane, and a spreader. The gantry is a steel structure assembly, and the bridge crane walks on it. The center of the side bridge deck can exceed the center of the beam of the gantry to lay the side bridge slab; the bridge crane moves on the gantry as a whole machine, and can adjust the board picking and laying positioning; each of the four legs of the gantry is equipped with a Cantilever crane, the cantilever crane reverses and lays the walking track of the door crane before and after, and implements the segmental forward or backward of the paving door machine; the spreader includes hanger, spreader shaft and rope. When the crane crosses the span, the rotary crane installed on the gantry crane completes the front and rear installation and disassembly of the traveling track beam of the gantry crane cart, which can facilitate and quickly cross the span and shorten the auxiliary adjustment time of the crane.

Description

Gantry crane for laying bridge deck

technical field

The invention relates to a large-scale bridge deck paving construction equipment, which belongs to the field of hoisting machinery design and manufacture.

Background technique

During the construction of long-span bridges, bridge decks are laid on steel girder bridges such as steel arch bridges, cable-stayed bridges, and suspension bridges. The bridge deck pavement construction process of some large bridges is generally erected by bridge erecting machines or laid by boat-type floating cranes in waterways. The investment in equipment for a bridge erecting machine is large, and less slabs can be laid in one day. The process is complicated, the equipment cost is large, the efficiency is low, the construction period of the bridge is long, and it is impossible to use the floating crane to lay the bridge across the valley without a waterway. This is the main problem existing in the existing construction technology and equipment.

Contents of the invention

The invention provides a gantry crane with a variable span for the construction of a large-scale bridge slab pavement, which can adapt to a certain bridge deck width range.

The present invention is achieved like this:

A bridge deck laying gantry crane, including a supporting traveling gantry, a bridge crane, and a spreader. The gantry is a steel structure assembly, and the bridge crane walks on it. The main girder adopts a cantilever structure, so that the side bridge deck The center can exceed the center of the gantry beam to lay the side bridge slab; the bridge crane moves on the gantry as a whole machine, and can adjust the board picking and laying positioning; a cantilever crane is installed on each of the four legs of the gantry. Reverse and lay the door crane walking track before and after the hoisting, implement the segmental forward or backward of the paving door machine; the spreader includes hanger, spreader shaft and rope. The rope adopts double-eared rope and shackle locking type, and the double-eared rope is hung in the arc groove on the hanger.

When the crane crosses the span, the rotary crane installed on the gantry crane completes the front and rear installation and disassembly of the traveling track beam of the gantry crane cart, which can facilitate and quickly cross the span and shorten the auxiliary adjustment time of the crane.

The bridge deck laying gantry crane of the invention realizes variable span and can adapt to a certain bridge deck width range.

Description of drawings

Fig. 1 is the general front view of gantry crane of the present invention;

Fig. 2 is a schematic side view of the gantry crane of the present invention;

Fig. 3 is the front view of the spreader of the gantry crane of the present invention

Fig. 4 is a side view of the spreader of the present invention;

Fig. 5 is the double ear rope figure of the present invention;

The marks in the figure are: 1 Overhead crane 2 Gantry 3 Gantry running mechanism 4 Rail clamp 5 Cantilever crane

6 chain hoist 7 spreader 8 spreader shaft 9 rope 10 shackle 11 groove.

detailed description

Further explanation is made below in conjunction with accompanying drawing:

The bridge deck laying gantry crane of the present invention is composed of a supporting traveling gantry 2, a bridge crane 1, and a spreader. For the bridge deck, a cantilever crane 6 is installed on each of the four legs of the gantry. The cantilever crane 6 reverses and lays the walking track of the gantry crane before and after, and implements the segmental forward or backward movement of the paving door machine; the bridge type on the gantry The crane takes boards and lays boards on the gantry; the hanger adopts the hanging board hanger type, which can turn 360°;

The general drawing of the crane shown in Figure 1 is:

1. Bridge crane, the whole machine can be moved without a mast, and can adjust the position of taking board and laying board;

2. The gantry steel structure assembly is the main load-bearing part of the decking door machine, and the bridge crane walks on it. The shape of the gantry frame structure can meet the requirements of the bridge decking station. In order to facilitate the positioning of the bridge plate during rotation and positioning , raise the height of the lower beam from the rail surface, which is set at 1904mm; the main girder of the gantry adopts a cantilever structure, so that the decking machine can lay the side plates of the bridge; And can realize the use of limited variable span;

3. Walking platforms, ladders, and railings, on which electrical equipment is arranged as maintenance channels;

4. It is the running mechanism of the cart, and its driving side is a three-in-one drive, which is used for moving the planking machine and adjusting the position of the planking machine;

5. It is used as a safety device for the rail clamp as a windproof parking machine for paving machines and as a safety device for construction on sloped roads;

6. The cantilever crane 6 is used as the planking machine to move forward or retreat the track, and is an important auxiliary functional part of the planking machine to realize the pre-span of the track and greatly shorten the auxiliary time of moving the machine;

7. The spreader is an important functional part of the decking operation, and there have been great improvements and breakthroughs in the design. The existing technology uses a sling without a hanger, so that the entire lifting height is relatively high, and the height of the equipment is correspondingly increased. For some bridges If the steel arch bridge cannot pass through the lifting equipment, the hanger adopts the hanger type to greatly shorten the hoisting height, and there are multiple arc grooves on the main frame of the hanger to adapt to the hanging cables of bridge decks of various lengths and sizes. The rope is hung in the arc groove on the main frame of the hanger and can swing left and right to adapt to bridge decks of various widths and sizes. The hanger has versatility and convenient operation.

The typical operation steps of the bridge deck laying gantry crane are as follows:

The bridge deck laying gantry crane is installed and adjusted to the normal working off state → in place → the beam platform truck transports the bridge deck to the bottom of the gate crane → the trolley on the bridge crane retreats to the center of gravity of the bridge deck to take the deck → the trolley moves forward and the bridge crane moves Go to the installation position and turn the bridge deck → install the bridge deck (middle plate) in place → transport the bridge deck (side plate) with a flatbed truck → move the trolley on the bridge crane back and take the side plate forward to the installation position and turn the side plate → the crane drops the side plate Put it in place → install another side plate → reverse the track → cross the span → repeat the above working process of the crane.

Due to the long auxiliary time of the original bridge deck slabs, only 12 slabs can be laid at most in one day. Now, after the Xiangjiang Bridge is put into use, a slab decking gantry crane can lay 25 slabs a day.

This shows that compared with the prior art, the decking gantry crane of the present invention has substantive features and progress, and the beneficial effect of its implementation is also very remarkable.

Claims (1)

1. A bridge deck laying gantry crane, comprising a portal frame, a bridge crane, and a spreader combination, the portal frame is a steel structure assembly, and the bridge crane walks on it, and its main girder adopts a cantilever structure, so that The center of the side bridge panel can exceed the center of the gantry beam to lay the side bridge slab; the bridge crane moves on the gantry as a whole machine, and can adjust the board picking and laying positioning; it is characterized in that the door A cantilever crane is provided on each of the four legs of the frame, and a chain hoist is provided on the cantilever crane, and a rail clamp is also provided on the legs of the portal frame. Carry out reverse transportation and laying, and implement segmental forward or backward movement of the decking gantry crane; the spreader includes a hanger, spreader shaft and rope, and the spreader adopts a hanger hanger type, which can fully rotate 360° ; The rope adopts double-eared rope and shackle locking type, and the double-eared rope is hung in the arc groove above the hanger.