Installing method of portal crane

A technology of a gantry crane and an installation method, which is applied to the cranes, trolleys, transportation and packaging, etc., can solve the problems of difficult adjustment of rigid legs, safety, etc., and achieves accurate cable wind force, reduced cable wind adjustment, and convenient adjustment. Effect

Inactive Publication Date: 2006-09-20
TONGJI UNIV
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Problems solved by technology

The general method is to erect the entire rigid leg first, and then lift the girder into place. This method is difficult to adjust the center of gravity of ...
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Method used

Since the rigid leg of the present invention is gradually promoted in sections, the problem of unstable center of gravity is well solved, and the use of the lifting cylinder to tension the tower cable wind can accurately adjust and measure the impact of the cabl...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

A method for installing the gantry crane features that in the procedure of lifting up the large steel beam, the rigid legs and flexible legs are also lifting. It includes such steps as in-situ assembling master steel beam, hanging the carrier and maintenance hoist from the master beam, standing up two lifting towers, hydraulic lifting while segmenting assembling rigid legs and flexible legs, installing the running mechanism to the legs, and structural installation.

Application Domain

Technology Topic

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  • Installing method of portal crane
  • Installing method of portal crane
  • Installing method of portal crane

Examples

  • Experimental program(1)

Example Embodiment

[0009] The present invention will be further described with reference to the accompanying drawings. See figure 1 , 2 3, the present invention consists of beam 1, rigid leg 2, hinge point JX 3, sliding block 4, hinge point JS 5, lifting cylinder 6, tower top gantry beam 7, tower frame 8, walking mechanism 9, A-shaped head 10. Hinge point JB 11, hinge point JA 12, flexible leg lower crossbeam 13, flexible leg 14 and sliding trolley 15.
[0010] installation method:
[0011] 1. Installation of the tower and the gantry beam on the top of the tower
[0012] The present invention uses two pairs of towers 8 as lifting towers. The effective height of the towers 8 varies according to the specific gantry crane. Generally, it can be as high as more than 100 meters, with a cross-section of 4 meters, and a steel pipe lattice structure. The bottom of the frame 8 is connected with the ground foundation by bolts. The gantry beam 7 at the top of the tower is a box-shaped structure. The load capacity of each tower is more than two thousand tons. The center distance of the two towers across the gantry crane beam 1 is more than ten meters. On the top of the two towers, a box-shaped tower top gantry beam is a lifting beam, and the lifting cylinder 6 is placed on the gantry beam 7 on the top of the tower. ,see figure 2 Shown. After the installation of the tower 8 and the gantry beam 7 on the top of the tower is completed, the theodolite is used to calibrate the verticality of the tower, after meeting the requirements, they are fixed with a cable wind rope, and the movable end of the cable wind rope is clamped by a clamp.
[0013] Second, the promotion of beams
[0014] After the installation of the gantry beam 7 on the top of the tower frame 8 is completed, the lifting of the beam 1 starts. For the first lifting, the lifting height is determined according to the specific situation. Stop at about ten meters, install the rigid leg 2 upper structure and the flexible leg A head 10, calibrate its horizontal position, and fix it. Before the second lifting, use the hinge point JS 5 to connect one end of the rigid leg 2 to the beam 1, and place the other end of the rigid leg 2 on the two sliding trolleys 15. In this way, the rigid leg 2 is automatically seated as the frame 1 is lifted. After it is in place, calibrate the axis and connect with electric welding. At the same time, before the second lifting, the flexible leg 14 is connected to the A-shaped head 10 using the hinge point JA 12, so that the beam 1 is in place and the flexible leg 14 is automatically in place.
[0015] 3. Installation of rigid legs, see figure 2. In the first step, the rigid leg 2 is placed in the predetermined position in sections, and the upper and lower positions of the two ends are adjusted by hydraulic jacks, and the hinge point JS 5 and the hinge point JX 3 are connected. In the second step, one segment of the rigid leg 2 rises as the girder is lifted, and the other end is towed by a hoist to overcome horizontal friction. In the third step, slowly push the assembled walking mechanism 9 under the rigid leg 2. Finally, the beam 1 is lowered, and the joints at the sections are calibrated and welded.
[0016] Fourth, the installation of flexible legs, see image 3. After the gantry suspension beam 1 is raised for the first time, there are symmetrical hinge points JA 12 on both sides of the lower end of the A-shaped head 10 of the flexible leg, one on each side. In the first step, the flexible leg 14 is laid flat, one end of the leg tube is connected with the A-shaped head 10 by a hinge JA 12, and the other end is connected with the walking mechanism by a hinge JB 11. In the second step, the girder 1 is lifted, the flexible legs 14 naturally follow, and a horizontal traction force is applied in the horizontal direction of the flexible leg walking mechanism, which can reduce the vertical lifting force. In the third step, the girder 1 is in place, and the flexible leg 14 is naturally closed at the fracture.
[0017] Because the rigid legs of the present invention are gradually lifted in sections, the problem of instability of the center of gravity is well solved. In addition, the use of a lifting cylinder to tension the tower cable wind can accurately adjust and measure the force of the cable wind. The invention has been tested and has achieved great success in the application of two 600-ton×182-meter gantry cranes in the overall lifting project. Therefore, this method has substantial characteristics and significant advancement.
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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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