CN209369168U - A kind of large-sized station boiler large girder end shear connections structure - Google Patents
A kind of large-sized station boiler large girder end shear connections structure Download PDFInfo
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- CN209369168U CN209369168U CN201821974714.2U CN201821974714U CN209369168U CN 209369168 U CN209369168 U CN 209369168U CN 201821974714 U CN201821974714 U CN 201821974714U CN 209369168 U CN209369168 U CN 209369168U
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Abstract
The utility model discloses large-sized station boiler large girder end shear connections structures, it is arranged symmetrically resistant slide plate above and below the large girder superposed surfaces that large girder upper beam and large girder underbeam are formed and along the web of large girder, shearing bolt is arranged to be connected to form the large girder end shear connections structure across resistant slide plate with large girder superposed surfaces.Large girder upper beam, large girder underbeam and resistant slide plate are carried out whole brill of matching to process, be transported to after on-site hoisting and resistant slide plate is tightened to the large girder superposed surfaces that large girder upper beam and large girder underbeam are formed or more by shearing bolt column before carrying and is arranged symmetrically to form large girder end shear connections structure along the web of large girder.The utility model increases rubbing surface number in the resistant slide of the increase up and down plate of former large girder end superposed surfaces, improves the shear-carrying capacity of frictional high-strength bolts, meets the requirement of large girder end shear-carrying capacity.
Description
Technical field
The utility model relates to the technical fields of station boiler, more particularly, are related to a kind of big plate of large-sized station boiler
Beam end shear connections structure.
Background technique
Conventional large-sized station boiler large girder stoplog height nearly 9m, remote super generating transport size, thus common practice be will be big
Plate-girder is split as upper beam and underbeam along short transverse, in order to resist the sliding after upper and lower load bearing beam between superposed surfaces (such as Figure 1A institute
Show), underbeam superposed surfaces arrange 4~6 column high-strength bolts along the direction beam length L to transmit Transverse Shear usually in large girder height
Power, to resist the sliding between upper underbeam, this structure is referred to as the shear connections structure (as illustrated in figures ib and 1 c) of large girder.
But as station boiler further develops to the direction of high parameter, large capacity, the loading of boiler body is increasing,
The shearing of large girder end section is also increasing.By taking 1000MW π type double reheat boiler as an example, K4 large girder end shearing is set
Evaluation is difficult to meet shear-carrying capacity requirement up to 5200 tons using the plane connection structure that singly rubs shown in Figure 1B.
According to Shear Lag Effect and specialize in the result shows that: if the width for widening upper underbeam superposed surfaces increases again
Add bolt to arrange, can not guarantee that multiple row bolt equilibrium carries；The bolt column that actual conditions are proximate to web assume responsibility for more
Transverse shearing force, and it is smaller to arrange the transverse shearing force that it undertakes further away from the bolt of web.That is, only by the number of increase Bolt
Amount is difficult to meet the shear-carrying capacity requirement of bolt, and the bolt column that may cause instead close to web undertake larger shearing generation first
It destroys.
Summary of the invention
In order to solve the problems in the existing technology, the purpose of the utility model is to provide one kind by increasing rubbing surface
Quantity improves the structure type of frictional high-strength bolts shear-carrying capacity, not only economical but also simply solve large girder end and cut
Power is excessive and the technical problem of high-strength bolt difficult arrangement.
The utility model provides large-sized station boiler large girder end shear connections structure, in large girder upper beam and big plate
The large girder superposed surfaces that beam underbeam is formed have been arranged symmetrically resistant slide plate up and down and along the web of large girder, and shearing bolt column are worn
The resistant slide plate is crossed to connect to form the large girder end shear connections structure with large girder superposed surfaces.
According to one embodiment of the utility model large-sized station boiler large girder end shear connections structure, the big plate
Beam upper beam and large girder underbeam are described big for structural I-beam and including upper flange, lower wing plate and intermediate vertical web
Plate-girder superposed surfaces are overlapped and are formed by the lower wing plate of large girder upper beam and the upper flange of large girder underbeam.
According to one embodiment of the utility model large-sized station boiler large girder end shear connections structure, resistant slide plate
Including upper resistant slide plate and lower resistant slide plate, the upper resistant slide plate is arranged in above the lower wing plate of large girder upper beam, under described
Resistant slide plate is arranged in below the upper flange of large girder underbeam, and the shearing bolt is arranged across the upper resistant slide plate, large girder
The lower wing plate of upper beam, the upper flange of large girder underbeam and lower resistant slide plate and connect form large girder end shear connections
Structure
It is described anti-according to one embodiment of the utility model large-sized station boiler large girder end shear connections structure
Sliding plate includes the resistant slide plate on web two sides and two pieces of sons being arranged symmetrically, and the lower resistant slide plate includes being located at web
Resistant slide steel plate under two sides and two pieces of sons being arranged symmetrically.
According to one embodiment of the utility model large-sized station boiler large girder end shear connections structure, the shearing resistance
Bolt be classified as 4~6 column and along the width direction of large girder arrange, each column shearing bolt column include multiple shearing bolts and
It is arranged along the length direction of large girder.
According to one embodiment of the utility model large-sized station boiler large girder end shear connections structure, the antiskid
Plate is moved to be arranged in the end section of large girder or arrange along the length direction overall length of large girder.
Compared with prior art, the utility model large-sized station boiler large girder end shear connections structure and its assembly side
Method improves the high-strength spiral shell of friction-type to increase rubbing surface number in the resistant slide plate of increase up and down of former large girder end superposed surfaces
The shear-carrying capacity of bolt neither increases bolt specification nor increases bolt quantity, can but improve the bearing capacity of bolt three times, meet
The requirement of large girder end shear-carrying capacity.
Detailed description of the invention
Figure 1A shows the sliding situation schematic diagram of large girder in the prior art, and Figure 1B shows large girder in the prior art
Upper underbeam superposed surfaces use the resistant slide connection structure main view of single rubbing surface form, and Fig. 1 C shows large girder in the prior art
Upper underbeam superposed surfaces use the resistant slide connection structure side view of single rubbing surface form.
Fig. 2 shows the large-sized station boiler large girder end shear connections knots according to the utility model exemplary embodiment
The schematic view of the front view of structure.
Fig. 3 shows the large-sized station boiler large girder end shear connections knot according to the utility model exemplary embodiment
The side structure schematic view of structure.
Fig. 4 shows the large-sized station boiler large girder end shear connections knot according to the utility model exemplary embodiment
The action principle figure of structure.
Description of symbols:
1- large girder upper beam, the lower wing plate of 1-1- large girder upper beam, 2- large girder underbeam, 2-1- large girder underbeam upper limb
Plate, 3- large girder superposed surfaces, 4- web, 5- shearing bolt column, antiskid under resistant slide plate, 7- on the upper resistant slide plate of 6-, 6-1-
Move resistant slide plate under plate, 7-1-.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
?.
In view of the above technical problems, the utility model proposes the increase resistant slides up and down in former large girder end superposed surfaces
Steel plate increases rubbing surface number, improves the structure type of frictional high-strength bolts shear-carrying capacity, not only economical but also simply solve
Determined large girder end shear excessive, the technical problem of high-strength bolt difficult arrangement.
The technical solution of the utility model is specifically described and is illustrated below.
As station boiler further develops to the direction of high parameter, large capacity, the loading of boiler body is increasing, greatly
The shearing of plate-girder end is also increasing.By taking 1000MW π type double reheat boiler as an example, K4 large girder end shearing force design value reaches
It 5200 tons, is connected using list rubbing surface shown in Figure 1B with Fig. 1 C and is difficult to meet shear-carrying capacity requirement.
According to Shear Lag Effect principle, increase bolt column by widening the width of upper underbeam superposed surfaces merely, it can not
Enough guarantee multiple row bolt equilibrium carrying；The bolt column that actual conditions are proximate to web assume responsibility for more transverse shearing force, and separate
The transverse shearing force that the bolt column of web undertake is smaller.That is, the method for increasing bolt number of columns is difficult to meet Bolt
Shear-carrying capacity requirement, the bolt column that may cause close web instead undertake larger shearing and first destroy.
According to the calculation formula of following stoplog end bolt number, the large girder section for being Q to shearing, superposed surfaces bolt sum
N will meet following formula:
In formula, μ is rubbing surface anti-slip coefficient, and μ is definite value after large girder material determines；P is the high-strength of different size
The Prestress design value of bolt, increases with the increase of bolt specification；K is that pass coefficient takes k=1 to circular hole.Therefore, from
Above formula is not difficult to find out, to reduce the high-strength bolt quantity of large girder superposed surfaces, first is that increasing bolt specification, improves pretightning force P,
But the high-strength bolt of current maximum specification has used M30, and the oversized high-strength bolt more than M30, performance is unstable, design
Specification does not provide Prestress design value yet, therefore increases bolt specification and do not have feasibility；Second is that increasing the number of rubbing surface
nf, large girder stoplog is single rubbing surface structure, n at presentf=1, as illustrated in figures ib and 1 c.
Therefore, according to the loading characteristic of large girder, king-sized section is being sheared, is being considered as increasing above and below former superposed surfaces
Add the scheme of resistant slide plate, so that former high-strength bolt becomes three rubbing surfaces by single rubbing surface, improves 3 times of bearing capacity, it is this to do
Method economy is simple and is easily achieved.
Fig. 2 shows the large-sized station boiler large girder end shear connections knots according to the utility model exemplary embodiment
The schematic view of the front view of structure, Fig. 3 show the large-sized station boiler large girder end according to the utility model exemplary embodiment
The side structure schematic view of portion's shear connections structure.
As shown in Figures 2 and 3, exemplary embodiment according to the present utility model, the large-sized station boiler of the utility model
About 3 large girder superposed surfaces that large girder end shear connections structure is specifically formed in large girder upper beam 1 and large girder underbeam 2 and
It is arranged symmetrically resistant slide plate along the web 4 of large girder, shearing bolt column 5 pass through resistant slide plate and large girder superposed surfaces 3 connect
Connect the large girder end shear connections structure to form the utility model.
Wherein, large girder upper beam 1 and large girder underbeam 2 be structural I-beam and include upper flange, lower wing plate and in
Between vertical web 4, large girder superposed surfaces 3 overlap by the lower wing plate 1-1 of large girder upper beam and the upper flange 2-1 of large girder underbeam
It is formed.
The resistant slide plate of the utility model includes upper resistant slide plate 6 and lower resistant slide plate 7, and upper resistant slide plate 6 is arranged big
Above the lower wing plate 1-1 of plate-girder upper beam, lower resistant slide plate 7 is arranged in below the upper flange 2-1 of large girder underbeam, shearing bolt column
5 pass through upper resistant slide plate 6, the lower wing plate 1-1 of large girder upper beam, the upper flange 2-1 of large girder underbeam and lower resistant slide plate 7 and
Connection forms above-mentioned large girder end shear connections structure.
In order to form balanced frictional force, upper resistant slide plate 6 includes on 4 two sides of web and two pieces of sons being arranged symmetrically
Resistant slide plate 6-1, lower resistant slide plate 7 include the resistant slide steel plate 7-1 under 4 two sides of web and two pieces of sons being arranged symmetrically.
Shearing bolt is arranged, shearing bolt column 5 are 4~6 column and arrange along the width direction of large girder that each column is anti-
Bolt column are cut to include multiple shearing bolts and arrange along the length direction of large girder.Wherein, shearing bolt is the high-strength spiral shell of M30
Bolt.
Theoretically, resistant slide plate can be penetrated through along the length direction overall length of large girder and be arranged, but should mainly be considered big
Plate-girder shears king-sized end section installation, other sections determine whether to install after should being calculated according to shear-carrying capacity.
Fig. 4 shows the large-sized station boiler large girder end shear connections knot according to the utility model exemplary embodiment
The action principle figure of structure.
As shown in figure 4, after large girder starts carrying, the lower wing plate 1-1 of large girder upper beam and the upper limb of large girder underbeam
Plate 2-1 will have the tendency that opposite sliding, constitute a pair of of rubbing surface；In addition, upper 6 He of resistant slide plate newly increased in the utility model
Lower resistant slide plate 7 due to being tightened in large girder superposed surfaces before carrying with high-strength shearing bolt column, with superposed surfaces it
Between produce pressing force, when superposed surfaces sliding, upper resistant slide plate 6 and lower resistant slide plate 7 are respectively relative to superposed surfaces to be had up and down
It is remain stationary motionless trend, therefore superposed surfaces also have sliding trend relative to upper resistant slide plate 6 and lower resistant slide plate 7 respectively,
Friction pair is constituted, therefore the structure has newly increased two rubbing surfaces, forms 3 rubbing surfaces altogether, then nf=3.Then according to formula 1,
3 times of the bearing power increase of every high-strength shearing bolt, the shear-carrying capacity of large girder end height shearing section improves three times.
Also, 3 rubbing surfaces have been the ultimate bearings of large girder stoplog, then the upper and lower increase to resistant slide plate is passed through at rubbing surface
The steel plate of reason cannot have been recurred to the effect for increasing rubbing surface, because newly-increased resistant slide plate can not be generated with former resistant slide plate
Opposite tendency toward sliding does not constitute new friction pair.
Therefore, the embodiment of the utility model can farthest realize the promotion of shear-carrying capacity, without increasing bolt
Specification and bolt quantity, can but improve the bearing capacity of bolt three times, meet the requirement of large girder end shear-carrying capacity.If no
Using this method, then needs to add and set boiler colonnade, additionally increase more steel.By taking GE company, the U.S. as an example, 600MW or more
For unit in order to evade domestic large girder stoplog technical patent, spy adds additional a colonnade, and steel construction dosage is caused to rise 1,000
Remaining ton.The utility model can effectively contain rival using conventional single rubbing surface stoplog design large capacity, high parameter boiler
Large girder.
When assembling to above-mentioned large-sized station boiler large girder end shear connections structure, following step is specifically included
It is rapid:
Large girder upper beam 1, large girder underbeam 2 and resistant slide plate (including upper resistant slide plate 6 and lower resistant slide plate 7) are carried out
It is whole to be processed with brill, it is concentric with bolt hole when guaranteeing in-site installation.After large girder is transported to on-site hoisting, it will resist before carrying
Sliding plate (upper resistant slide plate 6 and lower resistant slide plate 7) is tightened to large girder upper beam 1 and large girder by shearing bolt column 5
Underbeam 2 formed about 3 large girder superposed surfaces and be arranged symmetrically along the web of large girder 4, form the big plate of the utility model
Beam end shear connections structure.
In order to guarantee the resistant slide effect of resistant slide plate, resistant slide plate used by the utility model need to successively carry out former material
Material inspection, processing of rust removing, rubbing surface sandblasting Shot Blasting, integrally matches with large girder and bores working process and non-rubbing surface painting at blanking
It fills the procedure of processing of processing and then is assembled with large girder.For proof strength, resistant slide plate is preferably high strength steel
Plate.
In conclusion the utility model is by the resistant slide plate of increase up and down in former large girder end superposed surfaces, to increase
Add rubbing surface number, improve the shear-carrying capacity of frictional high-strength bolts, neither increase bolt specification nor increases bolt quantity,
But the bearing capacity that bolt three times can be improved, meets the requirement of large girder end shear-carrying capacity.
The utility model is not limited to specific embodiment above-mentioned.The utility model expands to any in this specification
The new feature of middle disclosure or any new combination, and disclose any new method or process the step of or any new group
It closes.
Claims (6)
1. a kind of large-sized station boiler large girder end shear connections structure, which is characterized in that in large girder upper beam and large girder
The large girder superposed surfaces that underbeam is formed have been arranged symmetrically resistant slide plate up and down and along the web of large girder, shearing bolt arrange across
The resistant slide plate connects to form the large girder end shear connections structure with large girder superposed surfaces.
2. large-sized station boiler large girder end shear connections structure according to claim 1, which is characterized in that the big plate
Beam upper beam and large girder underbeam are described big for structural I-beam and including upper flange, lower wing plate and intermediate vertical web
Plate-girder superposed surfaces are overlapped and are formed by the lower wing plate of large girder upper beam and the upper flange of large girder underbeam.
3. large-sized station boiler large girder end shear connections structure according to claim 2, which is characterized in that resistant slide plate
Including upper resistant slide plate and lower resistant slide plate, the upper resistant slide plate is arranged in above the lower wing plate of large girder upper beam, under described
Resistant slide plate is arranged in below the upper flange of large girder underbeam, and the shearing bolt is arranged across the upper resistant slide plate, large girder
The lower wing plate of upper beam, the upper flange of large girder underbeam and lower resistant slide plate and connect form large girder end shear connections
Structure.
4. large-sized station boiler large girder end shear connections structure according to claim 3, which is characterized in that described anti-
Sliding plate includes the resistant slide plate on web two sides and two pieces of sons being arranged symmetrically, and the lower resistant slide plate includes being located at web
Resistant slide steel plate under two sides and two pieces of sons being arranged symmetrically.
5. large-sized station boiler large girder end shear connections structure according to claim 1, which is characterized in that the shearing resistance
Bolt be classified as 4~6 column and along the width direction of large girder arrange, each column shearing bolt column include multiple shearing bolts and
It is arranged along the length direction of large girder.
6. large-sized station boiler large girder end shear connections structure according to claim 1, which is characterized in that the antiskid
Plate is moved to be arranged in the end section of large girder or arrange along the length direction overall length of large girder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821974714.2U CN209369168U (en) | 2018-11-28 | 2018-11-28 | A kind of large-sized station boiler large girder end shear connections structure |
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| CN201821974714.2U CN209369168U (en) | 2018-11-28 | 2018-11-28 | A kind of large-sized station boiler large girder end shear connections structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403543A (en) * | 2018-11-28 | 2019-03-01 | 东方电气集团东方锅炉股份有限公司 | A kind of large-sized station boiler large girder end shear connections structure and its assembly method |
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2018
- 2018-11-28 CN CN201821974714.2U patent/CN209369168U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403543A (en) * | 2018-11-28 | 2019-03-01 | 东方电气集团东方锅炉股份有限公司 | A kind of large-sized station boiler large girder end shear connections structure and its assembly method |
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