CN204475954U - A kind of main material combining angle cross section without fill plate four for electric power pylon cut-offs node - Google Patents
A kind of main material combining angle cross section without fill plate four for electric power pylon cut-offs node Download PDFInfo
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- CN204475954U CN204475954U CN201520080060.9U CN201520080060U CN204475954U CN 204475954 U CN204475954 U CN 204475954U CN 201520080060 U CN201520080060 U CN 201520080060U CN 204475954 U CN204475954 U CN 204475954U
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Abstract
The utility model discloses a kind of main material combining angle cross section without fill plate four for electric power pylon and cut-off node, comprise four main materials, subcontracting process, described four main material two diagonal angles stagger and cut-off, the diagonal angle cut-off uses subcontracting process, described subcontracting process is arranged on inside two main materials cut-offfing at diagonal angle, and described four main materials directly contact setting between two mutually.The utility model cancels conventional four combination Bolted angle connection fill plates, direct four limbs with bolts, when main material breaking point ensures component strength and rigidity requirement, pasting board in cancelling flexibly, the pattern of direct employing subcontracting process connects, and effectively reduces node weight about 10%.Consider the stressed larger factor of four combination angle steel simultaneously, breaking point be have employed to the processing mode of " wrong internode, between two diagonal angle cut-off ", effectively prevent the adverse effect of cut-offfing connection stiffness sudden change, improve the safety of node.Owing to eliminating the fill plate of conventional four combination angle steel, effectively reduce whole tower weight amount, decrease welding job, processing facility, easy construction, have obvious advantage.
Description
Technical field
The utility model is that transmission relation iron tower main material cut-offs Types of nodes, espespecially without fill plate four combine angle steel electric power pylon adopt a kind of Special Main material cut-off Types of nodes.
Background technology
Along with the fast development of power grid construction, the progressively raising of electric pressure, multiloop, UHV transmission line construction get more and more, and adjoint tower load is also increasing, shaft tower component pattern also forward diversification strides forward, and single angle (containing large angle steel) can not meet load requirement.For the large load steel tower of mountain route, four combination angle head towers are adopted to be optimal selections, investigate production and condition of construction that current four combine angle steel, mostly the fill plate quantity of discovery four combination angle steel towers are that steel tower is heavier, welding capacity is comparatively large, inconvenient main cause of processing and construct.Day by day narrow with line corridor, mountain area cabling gets more and more, orographic condition residing for shaft tower is also more and more severe, and line construction transport of materials capabilities limits it is also proposed new challenge to the transport of large gauge iron tower construction member, becomes a difficult problem urgently to be resolved hurrily in Transmission Line Design.
Current conventional four combination angle steel towers, connect mainly through fill plate between four limbs component, all need the many impacts taking into full account that fill plate brings when many key node tectonic type designs.The main material of conventional four combination angle steel cut-offs Nodes and need arrange the interior pasting board identical with fill plate thickness, and the iron tower main material component simultaneously connected all needs to arrange a thicker fill plate.The main material of conventional four combination angle steel tower cut-offs Types of nodes and mainly contains following several respects shortcoming:
(1) in order to connect four combination angle steel, each internode of iron tower main material all needs to arrange the plate with fill plate same thickness, causes steel tower weight to lay particular stress on, and welding job amount is large, processing and construction inconvenience;
(2) in order to meet the requirement (considering the factor that four combination angle steel are connected by fill plate) that the main material of four combination angle steel connects, main material cut-offs Nodes need arrange the interior pasting board identical with fill plate thickness, causes node weight to lay particular stress on; And cut-off at the breaking point place main material of the stressed larger four limbs of script, the sudden change of Nodes rigidity is larger. simultaneously
Summary of the invention
Cut-off Nodes Problems existing and deficiency for existing current four combination angle steel tower main materials, provide a kind of main material combining angle cross section without fill plate four for electric power pylon to cut-off node, concrete technical scheme is as follows:
A kind of main material combining angle cross section without fill plate four for electric power pylon cut-offs node, comprise four main materials 1, exterior angle Baogang 2, described four main materials 1 liang of diagonal angle staggers and cut-offs, use exterior angle, the diagonal angle Baogang 2 of cut-offfing, described subcontracting process 2 is arranged on inside two main materials 1 cut-offfing at diagonal angle, and described four main materials 1 directly contact setting between two mutually.
Alternately, above-mentioned a kind of main material combining angle cross section without fill plate four for electric power pylon cut-offs node, the direction of described subcontracting process 2 with cut-off main material direction and arrange consistent, and be close to and cut-off main material, described subcontracting process 2 epimere is cut-off main material with top and is connected by link 3, and described subcontracting process 2 hypomere is cut-off main material with bottom and is connected by link.
Alternately, above-mentioned a kind of main material combining angle cross section without fill plate four for electric power pylon cut-offs node, and described link 3 is bolt.
Alternately, above-mentioned a kind of main material combining angle cross section without fill plate four for electric power pylon cut-offs node, and described subcontracting process 2 section area is more than or equal to and cut-offs main material section area.
Alternately, above-mentioned a kind of main material combining angle cross section without fill plate four for electric power pylon cut-offs node, described four main materials 1 are angle steel A4, angle steel B5, angle steel C6, angle steel D7, and described angle steel A4 and angle steel C6 forms diagonal angle one, and described angle steel B5 and angle steel D7 forms diagonal angle two; Described angle steel A4 and angle steel C6 cut-offs at breaking point 1 place, and described angle steel B5 and angle steel D7 cut-offs at breaking point 29 place.
Alternately, above-mentioned a kind of main material combining angle cross section without fill plate four for electric power pylon cut-offs node, described four main materials 1 between two mutually directly contact be directly fixedly connected with by link.
In sum, owing to have employed technique scheme, the beneficial effects of the utility model are:
What the utility model adopted combines the main material of angle steel without fill plate four and cut-offs node, cancel conventional four combination Bolted angle connection fill plates, the subcontracting process that the wrong internode of direct employing, between two diagonal angle are arranged solves main material and cut-offs connection and the larger problem of breaking point rigidity sudden change, subcontracting process is provided with in main material leg of angle, while the main material internal force of effective transmission, eliminate original interior pasting board, relatively former connected mode reduces node weight about 10%, effectively prevent the adverse effect of cut-offfing connection stiffness sudden change, improve the safety of node.By rationally arranging specification and the length of subcontracting process, main material component power transmission needs can be met to greatest extent, make conventional four combination angle steel no longer adopt cross fill plate and directly connect with bolt simultaneously, thus the object reaching reduction node weight, avoid connection stiffness to suddenly change, effectively reduce tower weight, reduce welding job amount, conveniently process and construct, shorten the construction period simultaneously, cost-saving, there is certain economy, four combination angle steel beam column are used at mountain route more convenient.
Accompanying drawing explanation
The utility model illustrates by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is that the main material of electric power pylon cut-offs node location schematic diagram front view;
Fig. 2 is that the main material of electric power pylon cut-offs node location schematic diagram side view;
Fig. 3 is that the main material of existing conventional four combination angle steel cut-offs node connecting structure schematic diagram;
Fig. 4 is the sectional view of 1-1 in Fig. 3;
Fig. 5 is the sectional view of 2-2 in Fig. 3;
Fig. 6 combines the main material of angle steel without fill plate four in the utility model to cut-off node connecting structure diagram;
Fig. 7 is the sectional view of 1-1,2-2 in Fig. 6;
Fig. 8 is the sectional view of 3-3,4-4 in Fig. 6;
Fig. 9 is the sectional view of 5-5 in Fig. 6;
Figure 10 cut-offs nodal finite element entity simulation model for combining the main material of angle steel without fill plate four;
Figure 11 cut-offs main material finite element solid simulation model for combining angle steel main material breaking point without fill plate four;
Figure 12 does not cut-off main material finite element solid simulation model for combining angle steel main material breaking point without fill plate four;
Figure 13 is for combine angle steel main material breaking point subcontracting process finite element solid simulation model without fill plate four;
Figure 14 is for combine angle steel main material breaking point connecting bolt finite element solid simulation model without fill plate four.
Reference numeral: 1 is main material, 2 is subcontracting process, 3 is link, 4 is angle steel A, 5 is angle steel B, 6 is angle steel C, 7 is angle steel D, 8 is breaking point one, 9 is breaking point two, 10 is a subcontracting process, 11 is No. two subcontracting process, 12 is No. three subcontracting process, 13 is No. four subcontracting process, 14 is conventional four combination angle steel breaking points, 15 is fill plate, 16 is interior pasting board, 17 is tower body and tower leg main material, 18 is main material breaking point, 19 is weld, 20 for not cut-off main material angle steel, 21 for cut-offfing main material angle steel.
Detailed description of the invention
All features disclosed in this manual, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Now current, node is cut-off for the main material of conventional four combination angle steel, as shown in Figure 3, because of the reason that four combination angle steel need fill plate 15 to connect, usual main material breaking point 14 is generally selected in internode waypoint, and the mode adopting subcontracting process 2 and interior pasting board 16 to combine carries out node connection, as shown in Figure 4, it is identical that the thickness setting and four of interior pasting board 16 combines Bolted angle connection fill plate 15, to transmit the internal force of main material up and down.Even if this connected mode is when subcontracting process 2 meets joints requirement, consider the factor that four combination angle steel connect by fill plate 15, still need to arrange the interior pasting board 16 with fill plate uniform thickness, cut-off node weight larger, and cut-off at the breaking point place main material of the stressed larger four limbs of script, the sudden change of Nodes rigidity is larger. simultaneouslyOther four combination angle steel main material component carries out component connection from all needing to arrange thicker fill plate 15 in each internode, and described fill plate 15 is welded into cross at weld 19, as shown in Figure 5, causes tower weight to lay particular stress on, and increases welding job amount, processing and construction inconvenience.
For the deficiency of pattern in the past, the present invention is when main material breaking point ensures component strength and rigidity requirement, and pasting board in cancelling flexibly, directly adopts the pattern of subcontracting process to connect, effectively reduce node weight about 10%; Consider the stressed larger factor of four combination angle steel simultaneously, breaking point be have employed to the processing mode of " wrong internode, between two diagonal angle cut-off ", effectively prevent the adverse effect of cut-offfing connection stiffness sudden change, improve the safety of node.The more important thing is and eliminate conventional four combination angle steel main material component fill plate, effectively reduce whole tower weight amount, decrease welding job, processing is convenient, easy construction, and inserting knot pattern is simple.
Main material cut-offs node and adopts the pattern of subcontracting process to process, and ensures the reliability connected.Subcontracting process is arranged on inside two main materials cut-offfing at diagonal angle, and direction is consistent with cut-offfing main material direction, and is close to and cut-offs main material, is connected respectively cut-off main material up and down by bolt.
As shown in Fig. 1, Fig. 6, breaking point 18 place of the main material of power transmission tower tower body 17 is provided with four main materials 1, exterior angle Baogang 2, and described four main materials 1 liang of diagonal angle staggers and cut-offs, and shows as the breaking point 1 on tower body, breaking point 29.Use exterior angle, the diagonal angle Baogang 2 of cut-offfing, described exterior angle Baogang 2 is arranged on inside two main materials 1 cut-offfing at diagonal angle, and described four main materials 1 directly contact setting between two mutually.Directly contact is by link mutually between two for described four main materials 1, and such as bolt is directly fixedly connected with.The direction of described exterior angle Baogang 2 with cut-off main material direction and arrange consistent, and be close to and cut-off main material, main material is cut-off by link 3 in described exterior angle Baogang 2 epimere and top, and such as bolt connects, and described exterior angle Baogang 2 hypomere is cut-off main material with bottom and is connected by link.Described breaking point 1 and breaking point 29 are positioned at different internode, and described breaking point 1 should not be less than 1.5 meters with the distance of breaking point 29.
Described four main materials 1 are angle steel A4, angle steel B5, angle steel C6, angle steel D7, and described angle steel A4 and angle steel C6 forms diagonal angle one, and described angle steel B5 and angle steel D7 forms diagonal angle two.As shown in Figure 7, described angle steel A4 and angle steel C6 cut-offs at breaking point 1 place, and a subcontracting process 10, No. two subcontracting process 11 are arranged on the two main materials 1 cut-off at diagonal angle, i.e. the inner side of described angle steel A4 and angle steel C6.And at this breaking point 1 place, described angle steel B5 and angle steel D7 does not cut-off, the inner side of described angle steel B5 and angle steel D7 does not need to arrange subcontracting process yet.As shown in Figure 8, described angle steel B5 and angle steel D7 cut-offs at breaking point 29 place, and No. three subcontracting process 12, four extra angle Baogangs 13 are arranged on the two main materials 1 cut-off at diagonal angle, i.e. the inner side of described angle steel B5 and angle steel D7.And at this breaking point 29 place, described angle steel A4 and angle steel C6 does not cut-off, the inner side of described angle steel A4 and angle steel C6 does not need to arrange subcontracting process yet.
As shown in Figure 9, described four main materials 1, namely directly contact is by link 3 mutually between two for angle steel A4, angle steel B5, angle steel C6, angle steel D7, and such as bolt is directly fixedly connected with.Without the need to arranging fill plate 15 between angle steel.
Described main material cut-offs the specification of node subcontracting process and length, connecting bolt specification and quantity all need to determine according to Force Calculation, ensure effectively to transmit main material internal force, subcontracting process area should not be less than the section area cut-offfing main material simultaneously, such as should not be less than the section area 1.3 times cut-offfing main material, effectively ensure the reliability connected.Main material cut-offs the cross four main material components in compound section that node connects not to be needed arrange other components and directly adopt bolt to connect.The length of four combination angle steel beam column subcontracting process, width and thickness calculate according to the internal force size of component to be determined to meet detailing requiments simultaneously, ensures the safety of component.Connecting bolt also needs to meet and calculates and detailing requiments, ensures the reliability connected between component.
What the utility model adopted combines the main material of angle steel without fill plate four and cut-offs Types of nodes, by finite element simulation simulation-analysis software and real model experiment equipment, carries out scheme comparison, determines best main material and cut-off Types of nodes.The main technological route that the utility model is implemented: carry out a large amount of finite element simulation sunykatuib analyses and calculate, comparative analysis combines without fill plate four feasible program that the main material of angle steel cut-offs node, by technology and economy comparison, determines the scheme of the optimum adopted.Carry out the real model experiment checking determining scheme, carry out combining the main material of angle steel without fill plate four and cut-off node verification and design optimization.
As shown in Figure 10, main material connected node main material between the adjacent segments of structure staggers and cut-offs in diagonal angle between two, adopts one group of subcontracting process to connect respectively on the diagonal, and another is organized relative angle steel and staggers after a fragment position and also adopt two subcontracting process to connect.In nodal finite element model, main material adopts the four combination angle steel without fill plate, and diagonal angle staggers and cut-offs, and is cut-offfing the corresponding employing in place two subcontracting process, subcontracting process and to cut-off main material with bolts.
Finite element analysis paper examines this type of combine angle steel without fill plate four and to stagger the reasonability of cut-offfing at diagonal angle between two, investigate diagonal angle between two and cut-off the stress performance of pattern at the main material in breaking point place, subcontracting process and connecting bolt, investigate this type of and cut-off pattern and whether can reach the larger deficiency of the reduction breaking point stiffness variation of expection.Whole model, adopt in lower end and combine the main material bottoms of angle steel without four of fill plate and to impose restriction fringe conditions, carry out node load-bearing simulation loading in upper end load application condition, 2 the main material of subcontracting process sections of cut-offfing are by its switching performance of bolt coupled simulation.Because force-mechanism is identical with analytical model, model is for one group of diagonal angle breaking point modeling analysis, and on diagonal, other one group of breaking point is stressed identical.For taking into full account the stress performance of this category node, the tension exist component actual capabilities and Compression operating mode have all carried out sunykatuib analysis, investigate the stress performance of node according to FEM (finite element) model result of calculation (VON-MISE stress), the stressing conditions of main material, subcontracting process and connecting bolt that cut-offs of diagonal angle is as follows between two for Nodes.
(under tension operating mode, main material pulling force is 4101.04KN to carry out the analysis of example loading simulation according to the stressed size of typical tower; Under pressurized operating mode, pressure is 4729.4KN), under four angle steel main material tension (pressure) operating mode, (pressure) stress and connecting angle is on average drawn to draw (pressure) stress to obtain according to the main material angle cross section of proper calculation: under tension operating mode, main material non-bolt hole site is 236.8MPa, have spiro keyhole position to be set to 290.2MPa, interior bag connecting angle net section mean stress is 221.1 MPa; Under pressurized operating mode, main material non-bolt hole site is 273.04MPa, has spiro keyhole position to be set to 327.0MPa, and interior bag connecting angle net section mean stress is 249.9MPa.
According to finite element method (fem) analysis stress as shown in figure 12, the stress distribution that Nodes does not cut-off in angle steel is comparatively even, and distribution situation conforms to the stress situation by modular formula theory calculate; Finite element method (fem) analysis stress as shown in figure 11, the angle steel that diagonal angle disconnects is a bit larger tham without subcontracting process section stress and does not cut-off angle steel before bolt, and be all less than and do not cut-off angle steel having subcontracting process interlude stress, larger in this section corresponding subcontracting process stress distribution.Cut-offfing angle steel and must being passed to subcontracting process by bolt by effective for load of Nodes upper end is described, load is passed to lower end angle steel by bolt by subcontracting process again, and subcontracting process assume responsibility for the effect of transmitting and cut-offfing angle steel internal force well.
As shown in figure 13, the stress envelope display of subcontracting process, it cut-offs angle steel section internal stress in connection and distributes relatively large, and distribution is comparatively even, comparatively identical with gauge theory calculated value.Because of the reason that tapping stress is concentrated, subcontracting process is the maximum position of its stress for shank of bolt and hole wall extrude contact site around bolt hole, and it is all in elastic range.Finite element analysis results illustrates, subcontracting process delivers the main material internal force that diagonal angle cut-offs the four combination angle steel without fill plate effectively, serves the good action of main material internal force " transmission tie ".It only has diagonal two angle steel to cut-off at same Nodes, compares the connected node that former four angle steel cut-off simultaneously, reduces the shortcoming of rigidity sudden change, has won again the good result reducing rigidity sudden change while effective transmission internal force.
As shown in figure 14, in the elastic range of material, (the elastic limit of material stress of setting is connecting bolt stress major part
) in, shearing bolt should check its shear-carrying capacity and pressure-bearing bearing capacity, and the bearing strength design load of screw rod is
, stress envelope display connecting bolt is safe, and delivers the component internal force by its junction preferably.
Can be found out by finite element VON-MISE stress diagram analysis result, subcontracting process, cut-off the stress of main material angle steel and bolt, outside removing bolt hole circumferential stress is comparatively large, (bolt hole week is that shank of bolt and hole wall extrude contact site, and the bearing strength design load of this position Q420 steel is
, and the elastic limit of materials stress defined during finite element analysis is
, consider that it is still in elastic stage by reality), no matter be main material tension or pressurized, it is all in elastic stage, and stress performance is better, and what diagonal angle between two can cut-off by subcontracting process effectively combine angle steel internal force without fill plate four transmits at node upper and lower.Simultaneously diagonal angle cut-offs the shortcoming reducing the change of breaking point rigidity Relatively centralized preferably between two, limited point of analytical proof, and adopting diagonal angle to cut-off between two can effective transmission capacity, and win the ideal effect reducing rigidity and suddenly change, this category node advantage is comparatively obvious simultaneously.
Relational language is explained:
As shown in Figure 1 and Figure 2, main material cut-offs node and refers to electric power pylon tower body 17 main material 1(steel tower vertical direction four main bearing member) single component is because to produce and the factor such as transport needs when reaching certain length to disconnect, and this cut-offs general at steel tower near nodal.
Conventional four combination angle steel adopt four limbs equal leg angle to be combined into cross section, and need jointly be connected four limbs angle steel by fill plate with bolt, current domestic electric power pylon four combines angle steel and all adopts this cross section type, and member section as shown in Figure 5.
Combining angle steel without fill plate four adopts four limbs equal leg angle to be combined into cross section, but it is without the need to connecting four limbs angle steel by fill plate, directly adopts bolt to splice, current domestic temporary nothing, belong to and using first, therefore be called " combining angle steel without fill plate four ", member section is illustrated in fig. 9 shown below.
The utility model is not limited to aforesaid detailed description of the invention.The utility model expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (6)
1. the main material combining angle cross section without fill plate four for electric power pylon cut-offs node, comprise four main materials (1), subcontracting process (2), it is characterized in that: described four main material (1) two diagonal angles stagger and cut-off, the diagonal angle cut-off uses subcontracting process (2), described subcontracting process (2) is arranged on two main material (1) inner sides that diagonal angle cut-offs, and described four main materials (1) directly contact setting between two mutually.
2. a kind of main material combining angle cross section without fill plate four for electric power pylon cut-offs node as claimed in claim 1, it is characterized in that: the direction of described subcontracting process (2) with cut-off main material direction and arrange consistent, and be close to and cut-off main material, described subcontracting process (2) epimere and top are cut-off main material and are connected by link (3), and described subcontracting process (2) hypomere and bottom are cut-off main material and be connected by link.
3. a kind of main material combining angle cross section without fill plate four for electric power pylon cut-offs node as claimed in claim 2, it is characterized in that: described link (3) is bolt.
4. a kind of main material combining angle cross section without fill plate four for electric power pylon cut-offs node as claimed in claim 1, it is characterized in that: described subcontracting process (2) section area is more than or equal to and cut-offs main material section area.
5. a kind of main material combining angle cross section without fill plate four for electric power pylon cut-offs node as claimed in claim 1, it is characterized in that: described four main materials (1) are angle steel A(4), angle steel B(5), angle steel C(6), angle steel D(7), described angle steel A(4) and angle steel C(6) form diagonal angle one, described angle steel B(5) and angle steel D(7) form diagonal angle two; Described angle steel A(4) and angle steel C(6) cut-off at breaking point one (8) place, described angle steel B(5) and angle steel D(7) cut-off at breaking point two (9) place.
6. a kind of main material combining angle cross section without fill plate four for electric power pylon cut-offs node as claimed in claim 5, it is characterized in that: described four main materials (1) between two mutually directly contact be directly fixedly connected with by link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520080060.9U CN204475954U (en) | 2015-02-05 | 2015-02-05 | A kind of main material combining angle cross section without fill plate four for electric power pylon cut-offs node |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520080060.9U CN204475954U (en) | 2015-02-05 | 2015-02-05 | A kind of main material combining angle cross section without fill plate four for electric power pylon cut-offs node |
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| CN204475954U true CN204475954U (en) | 2015-07-15 |
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| CN201520080060.9U Withdrawn - After Issue CN204475954U (en) | 2015-02-05 | 2015-02-05 | A kind of main material combining angle cross section without fill plate four for electric power pylon cut-offs node |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612454A (en) * | 2015-02-05 | 2015-05-13 | 中国电力工程顾问集团西南电力设计院有限公司 | Main material breaking joint for cross section of filler-plate-free four-combination angle steel of transmission tower |
-
2015
- 2015-02-05 CN CN201520080060.9U patent/CN204475954U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612454A (en) * | 2015-02-05 | 2015-05-13 | 中国电力工程顾问集团西南电力设计院有限公司 | Main material breaking joint for cross section of filler-plate-free four-combination angle steel of transmission tower |
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Granted publication date: 20150715 Effective date of abandoning: 20170222 |
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| AV01 | Patent right actively abandoned |