Low-wind-resistance cross section structure of double-box-girder quay crane girder

Abstract

The utility model discloses a low-wind-resistance double-box-girder quay crane girder cross section structure which comprises a double-box-girder quay crane girder cross section, and the lower half section of an outer side web plate of the double-box-girder quay crane girder cross section is arranged to be an inward bending section. An included angle alpha is formed between the upper end of the inward bending section and the outer side web plate; an included angle beta is formed between the upper end of the inward bending section and a bottom plate of the cross section of the double-box-girder quay crane girder; the included angle alpha and the included angle beta are both acute angles. The wind power coefficient in the cart running direction and the trolley running direction can be reduced at the same time.

Description

Technical Field

[0001] The utility model relates to a double-box girder cross-section technology of a shore container crane, and more specifically to a double-box girder shore crane cross-section structure with low wind resistance. Background Art

[0002] Usually, the outer side plate of the shore container crane with double box girder section is vertical, such as Figure 1 The position indicated by the middle arrow. When the beam is horizontal, when there is wind blowing in the direction of the trolley, the windward area is large, the deformation of the front beam is large, and the comfort of operation is affected. Moreover, when the beam is raised, since the machine room is generally on the land side of the upper beam on the land side, the center of gravity of the whole machine is biased towards the land side track. When there is wind blowing from the sea side to the land side in the direction of the trolley, the flange plate at the bottom of the beam is wide and the windward area is large, which will reduce the stability of the whole machine and increase the tension of the windproof cable on the sea side. Utility Model Content

[0003] In view of the defects existing in the prior art, the purpose of the utility model is to provide a double-box girder quay crane beam cross-section structure with low wind resistance, which can simultaneously reduce the wind coefficient in the running direction of the large vehicle and the running direction of the small vehicle.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A double-box girder quayside bridge girder section structure with low wind resistance, comprising a double-box girder quayside bridge girder section;

[0006] The lower half of the outer web of the double box girder quay bridge girder cross section is arranged as an inwardly bent section;

[0007] An angle α is formed between the upper end of the inwardly bent section and the outer web;

[0008] An angle β is formed between the upper end of the inwardly bent section and the bottom plate of the cross section of the double-box girder quay bridge girder;

[0009] The angle α and the angle β are both acute angles.

[0010] Preferably, both the angle α and the angle β are no greater than 60°.

[0011] Preferably, a vertical height H between the upper end of the inwardly bent section and the lower end of the inwardly bent section is not greater than 1 / 2 of the height of the outer web.

[0012] The utility model provides a low-wind-resistance double-box-girder quay bridge beam cross-section structure, in which the outer web is designed to be bent inward at the lower end, which can reduce the wind coefficient in the direction of the trolley running, and can also reduce the wind coefficient in the direction of the trolley running (beam raised state). Therefore, when the beam is in a horizontal state, when there is wind blowing in the direction of the trolley running, the wind coefficient is reduced because the outer web is bent inward, and the deformation of the front beam is reduced. Moreover, when the beam is in an raised state, when there is wind blowing from the sea side to the land side in the direction of the trolley running, the outer side of the flange plate at the bottom of the beam is bent upward, thereby reducing the wind coefficient, improving the stability of the whole machine when the wind in the direction of the trolley running blows from the sea side to the land side, and can reduce the tension of the windproof cable on the sea side. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the cross-sectional structure of the double-box girder quay crane girder;

[0014] Figure 2 It is a schematic diagram of the cross-sectional structure of the double-box girder quay bridge beam of the utility model. DETAILED DESCRIPTION

[0015] In order to better understand the above technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Combination Figure 2 As shown, the utility model provides a low wind resistance double box girder quayside bridge beam cross-section structure, including a double box girder quayside bridge beam cross-section;

[0017] The lower half of the outer web 1 of the cross-section of the double-box girder quay bridge beam is set as an inwardly bent section, which can reduce the wind coefficient in the running direction of the trolley and the trolley at the same time.

[0018] An angle α is formed between the upper end of the inwardly bent section and the outer web;

[0019] An angle β is formed between the upper end of the inwardly bent section and the bottom plate of the cross section of the double-box girder quay bridge;

[0020] The angle α and the angle β are both acute angles.

[0021] For every 1° inclination of the angle α or the angle β, the wind force coefficient can be reduced by 0.005, and can be lower by 0.3 at most, so the angle α and / or the angle β is not greater than 60°.

[0022] The height is determined according to the cross-sectional properties and construction requirements. The vertical height H between the upper end of the inward bending section and the lower end of the inward bending section is not greater than 1 / 2 of the height of the outer web 1.

[0023] The cross-sectional structure of the double-box girder quayside bridge of the utility model can be adjusted as needed. The cross-sectional structure of the ...

[0024] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A double-box girder quayside bridge beam cross-section structure with low wind resistance, comprising a double-box girder quayside bridge beam cross-section, characterized in that: The lower half of the outer web of the double box girder quay bridge girder cross section is arranged as an inwardly bent section; An angle α is formed between the upper end of the inwardly bent section and the outer web; An angle β is formed between the upper end of the inwardly bent section and the bottom plate of the cross section of the double-box girder quay bridge girder; The angle α and the angle β are both acute angles.

2. The low wind resistance double box girder quayside bridge girder cross-section structure according to claim 1 is characterized by: The angle α and the angle β are both no greater than 60°.

3. The low wind resistance double box girder quayside bridge girder cross-section structure according to claim 1 is characterized by: A vertical height H between the upper end of the inwardly bent section and the lower end of the inwardly bent section is not greater than 1 / 2 of the height of the outer web.

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