CN103031977A - High-strength flexible hubbed flange structure - Google Patents
High-strength flexible hubbed flange structure Download PDFInfo
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- CN103031977A CN103031977A CN2012105363572A CN201210536357A CN103031977A CN 103031977 A CN103031977 A CN 103031977A CN 2012105363572 A CN2012105363572 A CN 2012105363572A CN 201210536357 A CN201210536357 A CN 201210536357A CN 103031977 A CN103031977 A CN 103031977A
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Abstract
The invention provides a high-strength flexible hubbed flange structure, comprising a convex-platform-shaped flange body, wherein a convex part of a convex platform is provided with through holes which are parallel to the axis of the convex part; a flange plate at the bottom of the convex part is provided with a bolt hole which is parallel to the axis; the distance a from the central line of the bolt hole to the edge of the flange body is not less than 1.1 times as much as the diameter of a bolt; and hole diameters of the through holes are different. According to the high-strength flexible hubbed flange structure, the stress of the flange neck part of the flange and the bolt is more reasonable, the thickness of the flange plate is relatively thinned and the steel utilization amount is saved.
Description
Technical field
The present invention relates to a kind of flange, relate in particular to a kind of high-strength flexible hubbed flange structure.
Background technology
Along with the development of long distance, large capacity transmission technology, the construction of UHV transmission line, the transmission tower structure presents the trend of maximization, and high strength steel is day by day urgent in the application of steel tube component and flange connected node.
Existing steel tube tower in electric transmission line master material connects the have stiffening flange of adding and non-stiffened flange commonly used.Non-stiffened flange, owing to the floor of not putting more energy into causes the flanged plate distortion larger, its intensity is less also; The stiffening flange of adding is arranged, as shown in Figure 1, be welded with the floor of putting more energy on it, increased the workload of welding, and welding quality is difficult for guaranteeing.
Hubbed flange is a kind of novel flange connection type, and one is forged and formed, and therefore the floor of not putting more energy into has avoided having the large problem of flange welding workload of putting more energy into, and more easily guarantees product quality; Hubbed flange is compared with non-stiffened flange and has been set up neck flange, has improved thus the strength and stiffness of flange, thereby has enlarged the scope of application that flange connects at various different tube diameters steel pipes.At present, the high strength steel pipe tower z master material in China's project of transmitting and converting electricity still adopts the high-intensity stiffening flange of the adding connection that has mostly; Have indivedual employing Q345 hubbed flanges to connect high tensile steel tube, although load-carrying properties meet the demands, the strength matching degree is unreasonable.For example the hubbed flange that adopts of Japanese power transmission steel pipe tower is rigid flange, and namely flanged plate is thicker, rigidity is larger, without the perk distortion, caused thus the whole steel using amount of flange more greatly, very economical.
In addition, other industry such as China's petrochemical industry and Japan's transmission of electricity industry flange are commonly used plug-in type or downhand welding connected mode with the connected mode of steel pipe, be that two fillet welds are arranged between steel pipe and the flange, the welding job amount is relatively large, low but the weldquality detection difficult of its weld seam class requirement, weldquality is difficult to control, and two fillet welds leave far, and actual loading is inhomogeneous; In addition, the connected mode of slip-on welding flange and steel pipe is that steel pipe is inserted in the neck flange, between outer wall of steel pipe and neck flange inwall, produce easily certain gap, if there are the defectives such as trachoma, slag inclusion in fillet weld, pickle is known from experience from fault location and is entered gap between slip-on welding flange neck inwall and the outer wall of steel pipe during flange pickling, when zinc-plated in galvanized bath subsequently, high temperature can make the liquid in the gap transfer gas to and expand rapidly, cause in the gap pressing rapidly and strengthen and the spalling weld seam, when serious even produce booster.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of high-strength flexible hubbed flange, the flange neck of this flange and bolt stressed more reasonable, and relatively attenuate flanged plate thickness, saved steel using amount.
Concrete scheme of the present invention is:
A kind of high-strength flexible hubbed flange structure, comprise the boss shape flange body, be provided with the through hole parallel with its axis at this boss projection, the flanged plate of described projection bottom is provided with the bolt hole parallel with described axis, described bolt hole center line is not less than 1.1 times of diameters of bolt to the flange body edge apart from a, and does not wait in the aperture of described through hole.
Further, the inwall of described through hole has the inclined plane, and the inclined plane of described through-hole wall is shunk downwards by the flange body top, large, the little through hole in lower end on forming.
Further, the angle of the inclined plane of described through-hole wall and vertical plane is 5 °-15 °.
Further, the inwall of described through hole has cambered surface, forms through hole small in ends, broad in the middle.
Further, the bottom on the inclined plane of described through-hole wall is connected with vertical section.
Further, the aspect ratio of the inclined plane vertical height of described through-hole wall and described vertical section is 1.2:1.
Further, the bottom of described steel pipe and the top of the described flange body formation circumferential welded seam that offsets, described steel pipe and flange body are integrally welded by described circumferential welded seam.
Further, the described flange body steel that adopt intensity to be not less than the Q390 intensity rank are made.
Further, also comprise the bolt that matches with described bolt hole, the strength grade of described bolt is not less than 8.8 grades.
Further, has the from top to bottom inclined plane of expansion with the parallel outer wall of described flange body axis.
Further, described flanged plate 4 thickness are calculated by following formula:
In the formula: R
f---top power between the flanged plate, N;
C---flanged plate thickness, mm;
E---pitch of bolts, mm;
T
b---the pulling force during axial tension in corresponding tube wall section of bolt, N;
A---bolt hole center is to the distance of flange periphery, mm;
B---bolt hole center is to neck flange root distance, mm;
e
0---the nut edge is to the distance of flange periphery, mm;
The shear strength design load of fv---steel, N/mm
2
The Intensity Design value of f---steel, N/mm
2
A kind of transmission tower that has such as the arbitrary described hubbed flange of claim 1-9, comprise the body of the tower that is consisted of by mobile jib 8, cross-arm 9 and the hubbed flange that is arranged on described body of the tower both sides, described mobile jib is formed by connecting by plurality of sections of steel pipes, connect by described hubbed flange between every joint steel pipe, the described body of the tower height that is made of mobile jib is 35m-150m.
Adopt technique scheme, technique effect of the present invention has:
The high-strength flexible hubbed flange that the present invention proposes adopts inside and outside double-pitch type flange arrangement, and namely inside and outside sidewall is equipped with the inclined plane, makes the reasonable stress of flange neck and bolt.
The present invention proposes a kind of flexible hubbed flange that adopts high strength steel, namely selecting the high strength steel one to forge forms, high strength steel adopts the steel be not less than the Q390 intensity rank, has reduced welding job amount that traditional having add stiffening flange, has saved engineering cost; Adopt the flexible design theory, relatively attenuate flanged plate thickness, saved steel using amount, under the prerequisite that guarantees safe and reliable load-carrying properties, have significant economy; In addition, can also on intensity, be complementary with the high strength steel pipe member that is connected preferably.
The flange that the present invention proposes is that butt welding is connected with the connected mode of steel pipe, namely docks by means of a circumferential welded seam between steel pipe and the flange, and welding job amount less, weldquality can detect, and welding quality is guaranteed easily, and is stressed and service behaviour is more reasonable.
Description of drawings
Fig. 1 is that prior art has the structural representation that adds stiffening flange;
Fig. 2 is the structural representation of hubbed flange one embodiment provided by the invention;
Fig. 3 is the structural representation of another embodiment of hubbed flange provided by the invention;
Fig. 4 is the structural representation that hubbed flange provided by the invention is connected with steel pipe;
Fig. 5 is the flexible principle schematic of hubbed flange provided by the invention;
Fig. 6 is the structural representation of transmission tower provided by the invention.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
As shown in Figure 2, a kind of hubbed flange, comprise boss shape flange body 1, be provided with the through hole parallel with its axis 2 at this boss projection, the flanged plate 4 of described projection bottom is provided with the bolt hole parallel with described axis 5, described bolt hole 5 center lines to flange body 1 edge is not less than 1.1 times of diameters of bolt apart from a, has the from top to bottom inclined plane 7 of expansion with the parallel outer wall of described flange body 1 axis, the inwall of described through hole 2 has inclined plane 6, the inclined plane 6 of described inwall is shunk downwards by flange body 1 top, it is large to form the upper end, the through hole 2 that the lower end is little, the inclined plane 6 of described inwall is 10 ° with the angle of vertical plane, bottom on described flange body 1 inwall inclined plane 6 is connected with vertical section 12, and the vertical height on described inwall inclined plane 6 and the aspect ratio of described vertical section 12 are 1.2:1.
As shown in Figure 3, a kind of hubbed flange, comprise boss shape flange body 1, be provided with the through hole parallel with its axis 2 at this boss projection, the flanged plate 4 of described projection bottom is provided with the bolt hole parallel with described axis 5, described bolt hole 5 center lines to flange body 1 edge is not less than 1.1 times of diameters of bolt apart from a, has the from top to bottom inclined plane 7 of expansion with the parallel outer wall of described flange body 1 axis, the inwall of described through hole 2 has cambered surface 11, form small in ends, through hole 2 broad in the middle, the bottom of described inwall cambered surface 11 is connected with vertical section 12, and the aspect ratio of the vertical height of described inwall cambered surface 11 and described vertical section 12 is 1.2:1.
The high-strength flexible hubbed flange that the present invention proposes adopts inside and outside double-pitch type flange arrangement, and namely inside and outside sidewall is equipped with the inclined plane, makes the reasonable stress of flange neck and bolt; As shown in table 1, according to FEM data as can be known, inside and outside double-pitch type flange arrangement shown in Figure 1 and interior straight outer sloping formula, namely flange inner wall is that vertical plane, outer wall are that the flange arrangement on inclined plane is compared, its neck and bolt strained reduction arranged all.
The stressed comparison of two kinds of flange necks of table 1 pattern
As shown in Figure 4, flange of the present invention and steel pipe 3 adopts butt welding to be connected, i.e. the top of the bottom of described steel pipe 3 and the described flange body 1 formation circumferential welded seam that offsets, and it is integrally welded that described steel pipe 3 and flange body 1 are passed through described circumferential welded seam.
The high-strength flexible hubbed flange that the present invention proposes can be selected the high strength steel of Q390 and above intensity rank, the high-strength bolt of corresponding configuration 8.8 and above intensity rank.The intensity rank of flange and bolt is higher, the specification of flange and bolt is less, steel using amount less, economy is better.
As shown in Figure 5, the high-strength flexible hubbed flange that the present invention proposes has adopted flexible theory, and it is relatively thin that its flexible theory is mainly reflected in flanged plate thickness, has certain flexibility, with the bolt reasonable coordination, make flanged plate allow slight deformation, produce the top power R between the flanged plate
f, and to bolt strained consideration correction factor m, the correlation computations formula is as follows respectively:
1, the bolt design formulas during the hubbed flange axial tension:
In the formula:
---the bolt tension force of stressed maximum, N;
T
b---the pulling force during axial tension in corresponding tube wall section of bolt, N;
M---bolt strained correction factor gets 0.62;
A---bolt hole center is to the distance of flange periphery, mm;
B---bolt hole center is to neck flange root distance, mm.
When 0.62 (a+b)/a less than 1.1 the time, get 0.62 (a+b)/a=1.1.
2, the designing requirement of flanged plate thickness C is as follows:
Top power
Shear stress
Normal stress
In the formula: R
f---top power between the flanged plate, N;
C---flanged plate thickness, mm;
E---pitch of bolts, mm;
e
0---the nut edge is to the distance of flange periphery, mm;
The shear strength design load of fv---steel, N/mm
2
The Intensity Design value of f---steel, N/mm
2
Wherein, these two design loads that numerical value is steel of fv and f are according to the strength grade of the steel limit value by regulation and stipulation, and the true stress during design can not surpass this limit value (the 17th page of specified in more detail visible " Code for design of steel structures "), known T
b, a, b, E, e
0, try to achieve top power R according to formula (2)
f, the numerical value of a preliminary given flanged plate thickness C is again brought formula (3) into, (4) left-half equation is obtained shear stress, normal stress, and the inequality that satisfies right half part requires, and then the C value can be determined; Do not satisfy, then need again iteration tentative calculation, until satisfied.
As shown in Figure 6, a kind of transmission tower with this hubbed flange, comprise the body of the tower that is consisted of by mobile jib 8, the cross-arm 9 that is arranged on described body of the tower both sides and hubbed flange 10, described mobile jib 8 is formed by connecting by plurality of sections of steel pipes, connect by described hubbed flange 10 between every joint steel pipe, the described body of the tower height that is made of mobile jib 8 is 35m-150m, because this transmission tower is too tall and big, need between supervisor, to set up hubbed flange 10, be convenient to install, this hubbed flange 10 has flexibility, can effectively bear supervisor's weight.
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement the specific embodiment of the present invention, and do not break away from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (12)
1. high-strength flexible hubbed flange structure, comprise boss shape flange body (1), be provided with the through hole parallel with its axis (2) at this boss projection, the flanged plate (4) of described projection bottom is provided with the bolt hole parallel with described axis (5), it is characterized in that: described bolt hole (5) center line is not less than 1.1 times of diameters of bolt to flange body (1) edge apart from a, and does not wait in the aperture of described through hole (2).
2. hubbed flange as claimed in claim 1, it is characterized in that: the inwall of described through hole (2) has inclined plane (6), and the inclined plane of described through-hole wall is shunk downwards by flange body (1) top, forms that the upper end is large, the little through hole (2) in lower end.
3. hubbed flange as claimed in claim 2 is characterized in that: the inclined plane (6) of described through hole (2) is 5 °-15 ° with the angle of vertical plane.
4. hubbed flange as claimed in claim 1, it is characterized in that: the inwall of described through hole (2) has cambered surface (11), forms through hole (2) small in ends, broad in the middle.
5. hubbed flange as claimed in claim 2, it is characterized in that: the bottom on the inclined plane (6) of described through hole (2) inwall is connected with vertical section (12).
6. hubbed flange as claimed in claim 5, it is characterized in that: inclined plane (6) vertical height of described through hole (2) inwall and the aspect ratio of described vertical section (12) are 1.2:1.
7. hubbed flange as claimed in claim 1 is characterized in that: the top of the bottom of described steel pipe (3) and described flange body (1) the formation circumferential welded seam that offsets, described steel pipe (3) is integrally welded by described circumferential welded seam with flange body (1).
8. hubbed flange as claimed in claim 1 is characterized in that: the steel that described flange body (1) adopts intensity to be not less than the Q390 intensity rank are made.
9. hubbed flange as claimed in claim 1, it is characterized in that: also comprise the bolt that matches with described bolt hole (5), the strength grade of described bolt is not less than 8.8 grades.
10. hubbed flange as claimed in claim 1 is characterized in that: have the from top to bottom inclined plane (7) of expansion with the parallel outer wall of described flange body (1) axis.
11. hubbed flange as claimed in claim 1 is characterized in that: described flanged plate (4) thickness is calculated by following formula:
In the formula: R
f---top power between the flanged plate, N;
C---flanged plate thickness, mm;
The E pitch of bolts, mm;
T
b---the pulling force during axial tension in corresponding tube wall section of bolt, N;
A---bolt hole center is to the distance of flange periphery, mm;
B---bolt hole center is to neck flange root distance, mm;
e
0---the nut edge is to the distance of flange periphery, mm;
The shear strength design load of fv---steel, N/mm
2
The Intensity Design value of f---steel, N/mm
2
12. transmission tower that has such as the arbitrary described hubbed flange of claim 1-9, it is characterized in that: comprise the body of the tower, the cross-arm (9) that is arranged on described body of the tower both sides and the hubbed flange (10) that are consisted of by mobile jib (8), described mobile jib (8) is formed by connecting by plurality of sections of steel pipes, connect by described hubbed flange (10) between every joint steel pipe, the described body of the tower height that is made of mobile jib (8) is 35m-150m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210536357.2A CN103031977B (en) | 2012-12-12 | 2012-12-12 | High-strength flexible hubbed flange structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210536357.2A CN103031977B (en) | 2012-12-12 | 2012-12-12 | High-strength flexible hubbed flange structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103031977A true CN103031977A (en) | 2013-04-10 |
| CN103031977B CN103031977B (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210536357.2A Active CN103031977B (en) | 2012-12-12 | 2012-12-12 | High-strength flexible hubbed flange structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108019084A (en) * | 2017-12-27 | 2018-05-11 | 国网江苏省电力有限公司经济技术研究院 | Special-shaped flexible flange connecting node of power transmission tower |
| CN109457868A (en) * | 2018-07-10 | 2019-03-12 | 国网浙江省电力有限公司丽水供电公司 | A kind of steel tube concrete column feet node and its construction method |
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| CN201902736U (en) * | 2010-12-31 | 2011-07-20 | 浙江飞挺管业有限公司 | Welding neck flange |
| CN202090659U (en) * | 2010-12-30 | 2011-12-28 | 国家电网公司 | Flange and flange component used for AD (alternating current) EHV (extra-high voltage) steel tubular tower |
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2012
- 2012-12-12 CN CN201210536357.2A patent/CN103031977B/en active Active
Patent Citations (10)
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| GB949474A (en) * | 1959-08-28 | 1964-02-12 | Dilo Ges Drexler Und Co | Sealing means |
| CN2349529Y (en) * | 1998-11-25 | 1999-11-17 | 张延丰 | External end cap side neck-changeable flange for float head type heat-exchanger |
| DE10216175C1 (en) * | 2002-04-12 | 2003-07-24 | Stiebel Eltron Gmbh & Co Kg | Plastic vessel or pipe has internal and external casings bonded by friction-welding their differing plastic materials together in single operation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108019084A (en) * | 2017-12-27 | 2018-05-11 | 国网江苏省电力有限公司经济技术研究院 | Special-shaped flexible flange connecting node of power transmission tower |
| CN109457868A (en) * | 2018-07-10 | 2019-03-12 | 国网浙江省电力有限公司丽水供电公司 | A kind of steel tube concrete column feet node and its construction method |
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|---|---|
| CN103031977B (en) | 2015-07-08 |
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