CN201980862U - Reinforced structure of small-tonnage steel crane girder - Google Patents
Reinforced structure of small-tonnage steel crane girder Download PDFInfo
- Publication number
- CN201980862U CN201980862U CN2011200598638U CN201120059863U CN201980862U CN 201980862 U CN201980862 U CN 201980862U CN 2011200598638 U CN2011200598638 U CN 2011200598638U CN 201120059863 U CN201120059863 U CN 201120059863U CN 201980862 U CN201980862 U CN 201980862U
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- steel
- crane girder
- top flange
- plate
- reinforced structure
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Abstract
The utility model relates to the field of steel crane girder reinforcement, in particular to a reinforced structure of a small-tonnage steel crane girder. The reinforced structure comprises a pair of angle steel and a support plate, wherein the pair of angle steel is symmetrically arranged on the two sides of a top flange steel plate; the top flange steel plate and the angle steel are fixed by a single bevel groove in a butt-welding manner; and the support plate is welded and fixed on a stiffening plate of an original crane girder to reinforce the top flange steel plate and the stiffening plate. The reinforced structure of the small-tonnage steel crane girder has the advantages that the damage to an original structure is small, the whole welding capacity is minimized, and the over-head welding is avoided in welding, which is beneficial for construction; the original crane girder can be sustainably used after reinforced by the utility model, can meet the running requirement of cranes with ceaselessly-increased tonnages, avoids a great deal of human and financial resources consumed in original plant rebuilding, and can greatly quicken the plant reforming period at the same time. Therefore, the reinforced structure meets the mode of low-carbon economy advocated nowadays.
Description
Technical field
The utility model relates to the steel crane beam field of reinforcement, relates in particular to a kind of ruggedized construction of little tonnage steel crane beam.
Background technology
Exist the steel crane beam of a lot of little tonnages in the industrial premises of a large amount of medium-sized and small enterprises of China, little tonnage steel crane beam ubiquity crane girder cross section is little, the problem that rigidity is less than normal, and majority does not have brake structure, after crane lifting energy level increases, obvious deficiency can appear in former crane girder intensity, and former crane girder rigidity also is difficult to satisfy the amount of deflection allowed value of regulation and stipulation.Continuous lifting along with China's heavy industry energy level, crane lifting energy level demand is also increasing, if can make it be able to sustainable use by reinforcing old crane girder lifting carrying energy level, then avoided former factory building to rebuild required a large amount of person property that expends, can accelerate greatly the old factory rehabilitation cycle again simultaneously, meet the mode of the low-carbon economy of advocating now.
Disclose a kind of ruggedized construction of steel crane beam in the existing Chinese patent 200820302851.1, be connected shore and reinforce crane girder between steel crane beam and factory building steel column, shore can be connected the stage casing or the bottom of factory building columns.If shore is connected the stage casing of factory building columns, then the shearing of crane load generation will act directly on factory building columns half waist position, and is very unfavorable to former factory building columns, even the factory building columns that needs reinforcement, and increased the reinforcing amount.If shore is connected the bottom of factory building columns, basis to former factory building can produce horizontal shear, the foundation bearing capacity deficiency that may cause former factory building columns, and the foundation of reinforcing old factory building also is a relatively thing of difficulty, at last for steel crane beam, lower flange steel plate tension, fatiguability damages, therefore shore and former crane girder lower flange should not be welded, so method is not suitable for the reinforcing of little tonnage crane girder.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of ruggedized construction of little tonnage steel crane beam, this ruggedized construction welding job amount is reduced to minimum, and the welding process has been avoided overhead welding, operating position is good, need not remove original crane runway again, be beneficial to very much construction, greatly reduce the influence that enterprise is produced.
The utility model is achieved in that a kind of ruggedized construction of little tonnage steel crane beam, comprise angle steel and stay bearing plate, described angle steel is total a pair of, be symmetricly set on steel plate both sides, top flange, fix by monolateral groove butt welding between top flange steel plate and the angle steel, described stay bearing plate is weldingly fixed on the stiffener, reinforces top flange steel plate and stiffener.
The side of described stay bearing plate is weldingly fixed on the stiffener, and the top margin of stay bearing plate holds out against the top flange steel plate
Described stay bearing plate is a right-angled trapezium.
The ruggedized construction of the little tonnage steel crane beam of the utility model, because little tonnage crane girder top flange steel plate is generally thinner, after the employing angle steel was reinforced, the top flange steel plate became non-cantilever end, had well solved the problem that top flange, back steel plate flakiness ratio transfinites of reinforcing.Angle steel and former crane girder top flange steel plate adopt monolateral groove butt welding in addition, and be little to original design damage, and every crane girder is two weld seams only; The side of stay bearing plate is weldingly fixed on the stiffener simultaneously, the top margin of stay bearing plate and top flange steel plate hold out against and do not weld, single-piece welding job amount is reduced to minimum, and the welding process has been avoided overhead welding, operating position is good, need not remove original crane runway again, be beneficial to very much construction, greatly reduce the influence that enterprise is produced; After adopting the utility model to reinforce, make original crane girder be able to sustainable use, adapt to the crane operating needs that tonnage constantly increases, avoided former factory building to rebuild required a large amount of person property that expends, can accelerate greatly the old factory rehabilitation cycle again simultaneously, meet the mode of the low-carbon economy of advocating now.
Description of drawings
Fig. 1 is the ruggedized construction scheme drawing of the little tonnage steel crane beam of the utility model.
Among the figure: 1 top flange steel plate, 2 stiffeners, 3 angle steel, 4 stay bearing plates.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model statement, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
As shown in Figure 1, a kind of ruggedized construction of little tonnage steel crane beam, comprise angle steel 3 and stay bearing plate 4, described angle steel 3 has a pair of, be symmetricly set on top flange steel plate 1 both sides, fix by monolateral groove butt welding between top flange steel plate 1 and the angle steel 3, this welding manner is little to the original design damage, every crane girder is two weld seams only, and the welding job amount is reduced to minimum, and the welding process has been avoided overhead welding, operating position is good, need not remove original crane runway again, be beneficial to very much construction, greatly reduce the influence that enterprise is produced; A stay bearing plate 4 just is set between top flange steel plate 1 and stiffener 2 simultaneously at a certain distance, with integral rigidity and the torsional property that strengthens former crane girder, the side of stay bearing plate 4 is weldingly fixed on the stiffener 2, and the top margin of stay bearing plate 4 holds out against top flange steel plate 1 to reduce welding capacity.
Present embodiment can further describe into, described stay bearing plate 4 is a right-angled trapezium, has so not only alleviated the weight of equipment integral, can also guarantee original rigidity of structure.
Adopt the utility model that one example was built in 2005, span 21m, post are apart from 6m, and two 5T electric single-beam cranes adopt the welding steel crane girder, and the high 9m of crane rail is after reinforcing.It is as shown in table 1 below to check data, and every index all is significantly improved:
| The checking computations project | Before the reinforcing | After the reinforcing |
| The top flange strength-stress ratio | 1.19 | 0.77 |
| The lower flange strength-stress ratio | 0.96 | 0.91 |
| Monolithic stability stress | 1.19 | 0.74 |
| Relative amount of deflection | 1/898 | 1/1030 |
Table 1
Claims (3)
1. the ruggedized construction of a little tonnage steel crane beam, it is characterized in that: comprise angle steel (3) and stay bearing plate (4), described angle steel (3) is total a pair of, be symmetricly set on top flange steel plate (1) both sides, fix by monolateral groove butt welding between top flange steel plate (1) and the angle steel (3), described stay bearing plate (4) is weldingly fixed on the stiffener (2), reinforces top flange steel plate (1) and stiffener (2).
2. the ruggedized construction of little tonnage steel crane beam as claimed in claim 1 is characterized in that: the side of described stay bearing plate (4) is weldingly fixed on the stiffener (2), and the top margin of stay bearing plate (4) holds out against top flange steel plate (1).
3. the ruggedized construction of little tonnage steel crane beam as claimed in claim 1 or 2 is characterized in that: described stay bearing plate (4) is a right-angled trapezium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200598638U CN201980862U (en) | 2011-03-09 | 2011-03-09 | Reinforced structure of small-tonnage steel crane girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200598638U CN201980862U (en) | 2011-03-09 | 2011-03-09 | Reinforced structure of small-tonnage steel crane girder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201980862U true CN201980862U (en) | 2011-09-21 |
Family
ID=44608326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200598638U Expired - Lifetime CN201980862U (en) | 2011-03-09 | 2011-03-09 | Reinforced structure of small-tonnage steel crane girder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201980862U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107572372A (en) * | 2017-09-05 | 2018-01-12 | 长江精工钢结构(集团)股份有限公司 | The crane beam slab and its normotopia welding method of a kind of crane girder |
| CN111032340A (en) * | 2017-05-31 | 2020-04-17 | 利勃海尔比伯拉赫股份有限公司 | Supporting device for crane and working machine and crane with supporting device |
| CN112320579A (en) * | 2020-10-21 | 2021-02-05 | 中冶建筑研究总院有限公司 | Reinforcement construction method for novel crane beam with right-angle type abrupt change support |
-
2011
- 2011-03-09 CN CN2011200598638U patent/CN201980862U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111032340A (en) * | 2017-05-31 | 2020-04-17 | 利勃海尔比伯拉赫股份有限公司 | Supporting device for crane and working machine and crane with supporting device |
| CN107572372A (en) * | 2017-09-05 | 2018-01-12 | 长江精工钢结构(集团)股份有限公司 | The crane beam slab and its normotopia welding method of a kind of crane girder |
| CN112320579A (en) * | 2020-10-21 | 2021-02-05 | 中冶建筑研究总院有限公司 | Reinforcement construction method for novel crane beam with right-angle type abrupt change support |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110921 |
|
| CX01 | Expiry of patent term |