CN205257790U - Fixed high -low leg handle portal crane - Google Patents

Abstract

The utility model relates to a hoisting apparatus specifically is a fixed high -low leg handle portal crane, solve that present liang chang position is far away apart from the road bed, on the unavailability road bed fortune roof beam crane span structure establish and within range line arrangement form is set a roof beam in place for the unable problem that adopts present portal crane of continuous high mound to liangchang fortune, including the girder, locate on the girder the rail and along the hoist and mount overhead traveling crane of rail operation, girder one end below set up with the low landing leg of the prefabricated back pre -buried steel board welded of bridge floor, other end below set up with the high landing leg of bridge lower steel pipe pile platform welded, its crowning landing leg adopts the merogenesis to assemble to form through flange joint, high landing leg bottom steel pipe carries out the full weld with pre -buried steel sheet to be connected, two -layer staggered arrangement is divided through the channel -section steel in high landing leg top steel pipe inboard, steel sheet welded connection is passed through at the top, low landing leg is inverted triangular structure. Reduce the span of portal crane, reduced the height of unilateral landing leg, the security that has improved the portal crane structure.

Description

Fixed high and low leg beam gantry crane

technical field

The utility model relates to a lifting device, in particular to a gantry crane with fixed height and low legs.

Background technique

With the continuous acceleration of national highway construction, the technology of erecting bridges with gantry cranes has become increasingly mature. The traditional gantry crane installation form is to set the gantry crane walking track on both sides of the pier column, and the gantry crane is installed across the pier to erect the beam. The gantry crane with lifting height and lifting capacity can meet the construction requirements. Due to the different width of road surface, design elevation of bridge deck and self-weight of girders in each project, and the limited number of existing gantry cranes, in the selection process of gantry cranes, the choice of gantry cranes that can fully meet the construction requirements is low. Especially for the location of the highway girder site is far away from the subgrade, it is impossible to use the subgrade to transport the girder to the bridge erection, and the line layout within the range of the girder site is continuous high piers, and the width of the bridge deck is large. The selection of equipment is difficult, and the existing idle gantry cranes do not meet the requirements of the site. If a new gantry crane that meets the requirements is purchased, the cost will be high and the utilization rate will be low.

Contents of the invention

The utility model solves the problem that the existing beam yard is far away from the roadbed, cannot use the roadbed to transport the beams and erect the bridge, and the line layout in the beam yard transportation and erection range is continuous high pier, so the existing gantry crane cannot be used. A new fixed high and low leg girder gantry crane.

The utility model is realized by adopting the following technical scheme: fixed high and low leg girder gantry crane, including the main girder, the steel rail laid on the main girder and the hoisting crane running along the steel rail. The low outriggers are welded with pre-embedded steel plates on the top, and the high outriggers welded with the steel pipe pile cap under the bridge are arranged under the other end, wherein the low outriggers are inverted triangular truss structures, and the high outriggers are assembled in sections and passed through The high-leg structure consists of two sets of columns arranged along the direction of the longitudinal bridge and the tops are at an acute angle to each other. Each set of columns is composed of two steel pipes arranged in parallel along the direction of the transverse bridge. The steel pipes are connected with horizontal support rods at intervals from top to bottom, and the upper and lower horizontal support rods are connected by oblique pull rods.

The tops of the four columns of the high legs are connected as a whole by positioning steel pipes, the inner sides of the positioning steel pipes are arranged in two layers by means of double channel steel, and the tops are welded by positioning steel plates. This structural design further strengthens the height of the high legs. Structural stability at the top.

The steel pipe pile cap structure under the bridge includes a stone chip tamping layer and a concrete pouring cap arranged from bottom to top, and a number of steel pipe piles are pre-embedded in the chip stone tamping layer and the concrete pouring cap, and the top of the steel pipe pile protrudes from the concrete. The cap is poured and connected as a whole through pre-embedded I-beams. The bottom of the four columns with high legs and the pre-embedded I-beams are fully welded with steel plates. This structural design ensures a stable connection between the bottom of the high leg and the steel pipe pile cap under the bridge.

The structural design of the utility model makes full use of resources such as existing gantry cranes and existing materials. On the basis of the original gantry cranes, on-site processing, refitting, and installation and debugging fix the high and low leg gantry cranes, in which the high legs are installed on the bridge. Below, the low outriggers are installed on the bridge deck, and the low outriggers are welded to the prefabricated beam top pre-embedded steel plate for consolidation connection, and the high outriggers are welded to the steel pipe pile cap under the bridge, which greatly reduces the span of the gantry crane , and the height of the low outrigger is greatly reduced, the stability of the gantry crane is greatly improved, and the safety risk during the use of the gantry crane is reduced; and the low outrigger is an inverted triangular truss structure, and the high outrigger is composed of two sets of columns set at an acute angle at the top , strong stability, the utility model is simple in structure, reasonable in design and convenient in construction, which not only reduces the span of the gantry crane, reduces the height of one side outrigger, improves the safety of the gantry crane structure, but also reduces the difficulty of equipment selection , Compared with newly purchased gantry cranes, a single gantry crane saves an investment of more than 800,000 yuan.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the side view of Fig. 1;

Fig. 3 is a partial enlarged view in Fig. 2;

Fig. 4 is the side view of Fig. 3;

Fig. 5 is A-A sectional view among Fig. 3;

In the figure: 1-main girder; 2-rail; 3-hoisting crane; 4-low outrigger; 5-steel pipe; 6-horizontal support rod; ; 10-concrete pouring platform; 11-steel pipe pile; 12-embedded I-beam.

detailed description

Fixed high and low leg girder gantry cranes, as shown in Figures 1 and 2, include the main girder 1, the steel rail 2 laid on the main girder, and the hoisting crane 3 running along the rail. The low leg 4 welded by the steel plate, and the high leg welded with the steel pipe pile cap under the bridge are arranged under the other end. The low leg is an inverted triangle truss structure, and the high leg is assembled in sections and passed through the flange The high outrigger structure consists of two sets of columns arranged along the longitudinal direction of the bridge and the tops are at an acute angle to each other. Each set of columns is composed of two steel pipes 5 arranged in parallel along the direction of the transverse bridge. Between two adjacent steel pipes The horizontal support rods 6 are connected at intervals from top to bottom, and the upper and lower horizontal support rods are connected by oblique pull rods 7 .

The tops of the four columns of the high legs are connected as a whole by positioning steel pipes 8, the inner sides of the positioning steel pipes are arranged in two layers by means of opposite-drawing channel steels, and the tops are welded by positioning steel plates.

The structure of the steel pipe pile cap under the bridge includes a stone chip tamping layer 9 and a concrete pouring cap 10 arranged from bottom to top, and a number of steel pipe piles 11 are pre-embedded in the chip rock tamping layer and the concrete pouring cap, and the top of the steel pipe pile protrudes from the concrete The cap is poured and connected as a whole through the pre-embedded I-beam 12, and the bottom of the four columns of the high leg and the pre-embedded I-beam are connected by full welding with steel plates.

The following steps can be adopted during installation of the gantry crane described in the utility model:

The basic steps of gantry crane installation are: 100t truck crane in place - segmented assembly of high outriggers - overall hoisting and low outrigger installation - installation of high outriggers - installation of main beam - welding of auxiliary reinforcement materials for high outriggers - installation of other gantry crane accessories.

1.100t truck crane in place

The 100t truck crane is positioned accurately by using the crane girder site and the road, which is mainly used for segmental hoisting of high outriggers under the bridge to complete the assembly of outriggers.

2. Installation of high outriggers under the bridge

1) Assemble the high outriggers in sections, use a 100t crane to hoist each outrigger one by one, and connect them as a whole with flanges;

2) After the high outriggers are assembled in sections, use a 100t truck crane to hoist them in place above the foundation as a whole, and use 0.67m×0.67m×40mm steel plates for full welding connection between the steel pipes at the bottom of the outriggers and the pre-embedded I-beams in the foundation. And use four 2.5m long, Φ outer = 300mm, δ = 6mm steel pipes fully welded to form a frame;

3) The top of the high leg is connected as a whole with 4 Φ outer = 300mm, δ = 6mm steel pipes, the inner side of the steel pipes are arranged in two layers of 16b# channel steel, and the top is welded with δ = 4cm steel plate;

4) After the high outriggers are in place, fix them on both sides with cable wind ropes.

3. Installation of low outriggers on the bridge deck

The low outriggers are technically transformed by using the upper part of the original MG160/10-40M gantry crane single side outriggers, hoisted in place with a 25t truck crane, and welded and consolidated with the pre-embedded steel plates on the beam top. After the low outriggers are welded and reinforced, use cable wind The rope is fixed on both sides.

4. Installation of main girder of gantry crane

The main girder of the gantry crane uses the original MG160/10-40M gantry crane main girder, which is cut off from the middle pin and half of it is selected. After the high and low outriggers of the gantry crane are in place and reinforced, a 100t truck crane under the bridge and a 25t truck crane on the bridge deck are used to complete the installation of the main girder of the gantry crane.

5. High leg auxiliary reinforcement material welding

The high outriggers are welded and connected between the two steel pipes along the bridge direction of the outriggers at vertical intervals of 8m with Φ outer=300mm, δ=6mm steel pipes to increase the overall rigidity and stability of the high outriggers of the gantry crane.

6. Finally, install all the remaining components of the gantry crane, including the installation of auxiliary components such as cranes, hoists, spreaders, electrical equipment, and operating rooms.

Engineering example:

Tongling Changjiang Highway-Railway Bridge subgrade junction LJ03 beam field is located in Gaogou Town, Wuwei County, Wuhu City, Anhui Province. The T-beam field is located on the right side of the line mileage K23+700, responsible for the prefabrication of 882 pieces of T-beams in the section K22+871.562～K25+426.562 , erection, and bridge deck system construction. At present, the beam making, beam erection and bridge deck system construction tasks have all been successfully completed. In order to meet the requirement of transporting the girders on the T-beam bridge, the applicant adopted the gantry crane described in the utility model under the condition that the existing gantry crane resources could not meet the on-site construction requirements, which effectively utilized the existing resources and shortened the bridge transportation distance , achieved the desired effect.

Claims (3)

1. a fixing height leg bale handle straddle truck, comprise girder (1), the lifting overhead traveling crane (3) that is layed in the rail (2) on girder and moves along rail, it is characterized in that below, girder one end arranges the low supporting leg (4) welding with the prefabricated back pre-embedded steel slab of bridge floor, the high supporting leg of steel-pipe pile cushion cap welding under the setting of other end below and bridge, described low supporting leg is inverted triangular truss structure, high supporting leg is to adopt merogenesis assembled and be formed by connecting by ring flange, high leg structure comprises along vertical bridge to direction and top is mutually two groups of columns that acute angle arranges, every group of column is made up of two steel pipes (5) that be arranged in parallel along direction across bridge direction, between adjacent steel pipe, from top to bottom interval is connected with horizontal support bar (6) between two, on, between lower horizontal support bar, connect by oblique drawbar (7).

2. fixing height leg bale handle straddle truck according to claim 1, it is characterized in that being connected as a single entity by positioning steel tube (8) between four root post tops of high supporting leg, positioning steel tube inner side is by dividing two-layer interlaced arrangement to kerve steel, and weld by fixing steel plate at top.

3. fixing height leg bale handle straddle truck according to claim 1 and 2, it is characterized in that under bridge, steel-pipe pile suspended deck structure comprises the slabstone compacting layer (9) and the concreting cushion cap (10) that arrange from the bottom to top, in slabstone compacting layer and concreting cushion cap, be embedded with some steel-pipe piles (11), concreting cushion cap is stretched out at steel-pipe pile top, and be connected as a single entity by pre-buried I-steel (12), between four root post bottoms of high supporting leg and pre-buried I-steel, adopt steel plate to carry out full weld and be connected.