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Middle rail box girder for large-tonnage bridge crane and manufacturing method of middle rail box girder

A technology of bridge cranes and box girders, which is applied in manufacturing tools, track systems, transportation and packaging, etc., and can solve the problems of the middle rail box girders being limited by the lifting capacity

Active Publication Date: 2018-08-10
NINGXIA TIANDI BENNIU YINQI EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a middle-rail box girder for a large-tonnage bridge crane and its manufacturing method, which solves the problem that the middle-rail box girder is limited by the lifting capacity. The main girder of bridge cranes over 125 tons can still use the middle rail box girder

Method used

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  • Middle rail box girder for large-tonnage bridge crane and manufacturing method of middle rail box girder
  • Middle rail box girder for large-tonnage bridge crane and manufacturing method of middle rail box girder
  • Middle rail box girder for large-tonnage bridge crane and manufacturing method of middle rail box girder

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Refer to attached figure 1 And attached figure 2 As shown, a middle-rail box girder for a large-tonnage bridge crane includes transverse ribs 10, reinforcing plates 20, rails 30, upper flanges 40, lower flanges 50, webs 60, longitudinal ribs 70, Track pressing plate 80, large bent plate 90, half shaft sleeve 100, plug plate 110. The transverse ribs 10 include small transverse ribs 11, large transverse ribs 12 and end transverse ribs 13. The upper flange plate 40, the lower flange plate 50, and two webs 60 form a box beam. The longitudinal ribs 70 and the transverse rib 10 are arranged inside the box girder, and the large bent plate 90 is arranged at the end of the box girder. The middle part of the upper end of the transverse rib 10 is in close contact with the upper flange plate 40, and the rest is fixedly connected with the upper flange plate 40 , both sides of the transverse rib 10 are respectively fixedly connected with the web 60 , the upper end of the web 60 is...

example 2

[0057] The difference between example 2 and example 1 is that example 2 has increased the edge plate of the through hole of the large transverse rib plate, and the rest are the same, refer to the attached Figure 8 , attached Figure 9 And attached Figure 10 As shown, the through hole trimming board includes a vertical trimming board 126 and a horizontal trimming board 127, the vertical trimming board 126 is arranged on the left and right sides of the through hole 123, and the horizontal trimming board 127 is arranged on the upper and lower sides of the through hole 123 Both sides are perpendicular to the plate body 121 and are fixedly connected with it, and the two ends of the horizontal trim board 127 are respectively fixedly connected with two vertical trim boards 126 .

[0058] The permissible extrusion stress between the transverse rib 10 and the upper flange 40 is 1.4 times that of welding without welding. Because the upper edge of the transverse rib 10 is tightly wel...

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Abstract

Disclosed are a middle rail box girder for a large-tonnage bridge crane and a manufacturing method of the middle rail box girder. Two semicircular reinforcing plates are welded to each of the two sides of a large transverse rib plate and a small transverse rib plate of the box girder, the upper end is machined overall, thus a smooth plane is formed, and the part, within a certain range at the bottom of a rail, of the plane is not welded to an upper flange plate and is only in close contact with the upper flange plate. The magnitude of extrusion stress between the upper flange plate and the transverse rib plates can be achieved by changing the thickness of the semicircular reinforcing plates, therefore, the technical bottleneck of use limitation of the middle rail box girder is broken through, the use range of the middle rail box girder is widened, thus the middle rail box girder is suitable for all elevating capacity types, the manufacturing method is simple, meanwhile, the condition that a large bent plate structural style with a half shaft sleeve is adopted for the end of the box girder is suggested for the first time, and economic low-height column hinge connection of the box girder and a trolley is achieved.

Description

technical field [0001] The invention relates to the field of crane equipment, in particular to a middle-rail box girder for a large-tonnage bridge crane and a manufacturing method thereof. Background technique [0002] At present, there are three positional relationships between the main girder and the track of the bridge crane: the track is in the middle of the upper flange plate of the main girder, and the center line of the track coincides with the center line of the main girder, that is, the middle rail box girder; the center of the track is aligned with the center of the main web of the main girder , that is, a full-off-track box girder; the centerline of the track is between the centerline of the main girder and the centerline of one side of the web, that is, a half-off-track box girder. [0003] For bridge cranes with a lifting capacity of less than 125 tons, the above three types of relationship between the main girder and the track position can be used. In order to...

Claims

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Application Information

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IPC IPC(8): B66C7/00B66C7/08B66C6/00B23K31/02B23P15/00
Inventor 姚天富李子木姚烁哲江龙杨民于才伟
Owner NINGXIA TIANDI BENNIU YINQI EQUIP
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