CN203742239U - Electric transmission line tower structure capable of improving stress distribution - Google Patents
Electric transmission line tower structure capable of improving stress distribution Download PDFInfo
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- CN203742239U CN203742239U CN201320879756.9U CN201320879756U CN203742239U CN 203742239 U CN203742239 U CN 203742239U CN 201320879756 U CN201320879756 U CN 201320879756U CN 203742239 U CN203742239 U CN 203742239U
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- angle steel
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- transmission line
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Abstract
The utility model discloses an electric transmission line tower structure capable of improving stress distribution. The electric transmission line tower structure is applied to wine-glass-shaped electric transmission line towers and comprises a tower window, structural parts for improving stress distribution are respectively arranged on the inner side of an upper tower arm and the inner side of a lower tower arm on the left side of the tower window and the inner side of an upper tower arm on the left side of the upper window on the right side of the tower window, and the structural parts are fixed to angle steel of the inner side of the upper tower arm and the inner side of the lower tower arm. The electric transmission line tower structure capable of improving stress distribution improves stress distribution of the tower window of the wine-glass-shaped tower, enables stress distribution of the angle steel of the tower window of the wine-glass-shaped tower to tend to be uniform, reduces the possibilities of tower collapse under the condition of ice coating, and improves the ice-disaster-resistance capacity of the tower.
Description
Technical field
The utility model belongs to Anti-icing of Transmission Lines calamity and subtracts ice damage field, relates in particular to a kind of transmission line tower structure that improves stress distribution.
Background technology
Transmission line of electricity is important component part indispensable in power system, is bearing the important task of delivery of electrical energy.But the appearance of shaft tower and wire, ground wire icing when winter, and the consequent accident of falling tower, formed threat to transmission line of electricity safe and stable operation, so a large amount of research need to be carried out in Anti-icing of Transmission Lines calamity aspect.Statistics shows, in the transmission line of electricity ice damage that Central China in 2008 occurs, and the 90%th, destroy and cause by tower structure, therefore shaft tower is the transmission line of electricity object that middle needs pay close attention to of taking precautions against natural calamities.At present, the work of Anti-icing of Transmission Lines calamity is mainly carried out from following two aspects: the one, transmission line of electricity is carried out to Real-Time Monitoring, so that anti-ice damage early warning information to be provided; The 2nd, improve shaft tower body construction.
The real-time detection of transmission line of electricity adopts transmission line online monitoring system to carry out, and mainly comprises that video frequency monitoring system, icing on-line monitoring system, shaft tower are tilted in line monitoring system and shaft tower unbalanced tensile force on-line monitoring system.Above-mentioned four kinds of monitoring systems can be monitored for transmission line wire, ground wire and Lifting Method in Pole Tower Integral Hoisting operation condition, and propose anti-ice damage early warning information, but the anti-ice calamity ability of transmission line of electricity itself is not had to castering action.
The improvement of shaft tower body construction is by improving tower structure shape or increasing the anti-ice calamity ability that some steel structures connect to improve Lifting Method in Pole Tower Integral Hoisting.While designing transmission line of electricity at present, because design flow is larger, so are generally all the tower structures that directly adopt in shaft tower storehouse, therefore tower structure unity of form, lacks some and designs targetedly.And, for the shaft tower in some large spans and large discrepancy in elevation situation, the stress of shaft tower angle steel is often concentrated on upper and lower the cranking arm that is distributed in shaft tower tower window, and this concentrated stress can cause this region angle steel in icing situation, to reach very soon yield limit, thereby produces the danger that shaft tower collapses.
Utility model content
For existing wine glass-shaped shaft tower in large span and large discrepancy in elevation situation, stress is often concentrated to be distributed in and on tower window, is cranked arm and the problem of lower bent lever, the utility model provides a kind of transmission line tower structure that improves stress distribution, and this tower structure can improve the anti-ice calamity ability of shaft tower.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
Can improve the transmission line tower structure of stress distribution, be applicable to wine glass-shaped electric power line pole tower, comprise tower window, between the upper tower arm inner side in described tower window left side and the upper tower arm inner side on lower tower arm inner side and right side and lower tower arm inner side, be equipped with the structural member that improves stress distribution, described structural member is fixed on the main material angle steel of tower arm inner side and lower tower arm inner side.
Said structure part is that yield strength is the angle iron component of Q345.
Said structure part is the rectangle framework angle iron component that diagonal is provided with intersection angle steel.
Described structural member comprises two parallel vertical angle steel, two parallel horizontal angle steel, an oblique long angle steel and two oblique angle cleats; The angle steel of upper tower arm inner side comprises the first angle steel (2) and the second angle steel (4), the angle steel of lower tower arm inner side comprises triangular steel (3) and the 4th angle steel (5), the first angle steel (2) is connected with triangular steel (3), and the second angle steel (4) is connected with the 4th angle steel (5); Two vertical angle steel two ends are individually fixed on four angle steel of tower arm inner side and lower tower arm inner side, and two horizontal angle steel two ends are also individually fixed on four angle steel of tower arm inner side and lower tower arm inner side on tower window, vertical angle steel and horizontal angle steel formation rectangle framework; Oblique long angle steel two ends are individually fixed in the first angle steel (2) and the 4th angle steel (5) is upper, and form the diagonal of described matrix framework; The two ends of the first oblique angle cleat in two oblique angle cleats are individually fixed in the center range of triangular steel (3) and oblique long angle steel, and the two ends of the second oblique angle cleat are individually fixed in the center range of the second angle steel (4) and oblique long angle steel.
Compared with prior art, the utlity model has following characteristics and beneficial effect:
1, improve wine glass-shaped shaft tower tower window upper stress and distributed, angle steel stress distribution on wine glass-shaped shaft tower tower window is tending towards evenly, reduced to occur the possibility that shaft tower collapses in icing situation, improved shaft tower anti-ice calamity ability.
2, be applicable to 500kV transmission line of electricity list and return wine glass-shaped straight line pole.
Brief description of the drawings
Fig. 1 is conventional wine glass-shaped shaft tower tower window overall structure schematic diagram;
Fig. 2 is conventional wine glass-shaped shaft tower tower window right side tower arm partial structurtes schematic diagram;
Fig. 3 is screwhole position schematic diagram on angle steel inside tower arm and lower tower arm on tower window;
Fig. 4 fixes the structural representation after vertical angle steel on angle steel inside tower arm and lower tower arm on tower window;
Fig. 5 is the structural representation after fixed lateral angle steel on angle steel inside tower arm and lower tower arm on tower window;
Fig. 6 fixes the structural representation after oblique angle steel on angle steel inside tower arm and lower tower arm on tower window;
Fig. 7 is the utility model wine glass-shaped shaft tower tower window overall structure schematic diagram;
Fig. 8 is the utility model tower window right side tower arm partial structurtes schematic diagram;
The Q345 steel angle structure schematic diagram of Fig. 9 for adopting in detailed description of the invention;
Figure 10 is the schematic diagram to shaft tower load application and constraint in simulation comparison test.
Detailed description of the invention
Further illustrate a kind of detailed description of the invention of the present utility model below in conjunction with accompanying drawing.
Referring to Fig. 1～2, this figure is conventional wine glass-shaped shaft tower tower window construction schematic diagram, and wherein, Fig. 1 is tower window overall structure schematic diagram.Fig. 2 is tower window right side tower arm partial structurtes schematic diagram, and in figure, 1 represents the cross spider of tower arm and lower tower arm on tower window right side, and 2,3,4,5 represent respectively four main material angle steel of tower arm and lower tower arm inner side on tower window.Because wine glass-shaped shaft tower tower window construction is symmetrical, the specific implementation process of the present utility model taking right side shown in Fig. 2 as example illustrates only below.
Taking the cross spider (1) of tower arm on tower window right side and lower tower arm as reference line, upper apart from reference line first node (6) L at angle steel (2) and angle steel (3) respectively
1, L
2locate three screws (8) of each perforate footpath 3cm, spacing 5cm; Similarly, upper apart from reference line Section Point (7) L at angle steel (4) and angle steel (5) respectively
1, L
2three screws (8) of locating each perforate footpath 3cm, spacing 5cm, screwhole position is shown in Fig. 3.Verify discovery by calculating, work as L
1value be upper tower arm lengths 1/5～1/4 between, L
2value be lower tower arm lengths 1/5～1/4 between, improve stress distribution effect better, and the insulation distance between phase conductor and shaft tower in can not reducing.
The angle steel that is Q345 by two yield strengths (9～10) is vertically fixed on respectively between angle steel (2) and angle steel (3) and angle steel (4) and angle steel (5), angle steel (9) two ends are individually fixed on angle steel (2) on below screw and the upper the top of angle steel (3) screw by screw, angle steel (10) two ends are individually fixed on angle steel (4) on below screw and the upper the top of angle steel (5) screw by screw, see Fig. 4.
The angle steel that is Q345 by two yield strengths (11～12) is horizontally fixed on respectively between angle steel (2) and angle steel (4) and angle steel (3) and angle steel (5), angle steel (11) two ends are individually fixed on the middle screw on middle screw and the angle steel (4) on angle steel (2) by screw, angle steel (12) two ends are individually fixed on the middle screw on middle screw and the angle steel (5) on angle steel (3) by screw, see Fig. 5.
The angle steel that is Q345 by a yield strength (13) is oblique to be fixed on angle steel (2) and angle steel (5), angle steel (13) two ends are individually fixed on the upper the top screw of angle steel (2) and angle steel (5) on the screw of below by screw, see Fig. 6.
Respectively open the screw (8) of an aperture 3cm at angle steel (13) mid point toward 5cm place, two ends, see Fig. 6.Between the upper the top screw of angle steel (4) and angle steel (13) top screw, be screwed the angle steel that yield strength is Q345 (14), on angle steel (3), between below screw and angle steel (13) below screw, be screwed the angle steel that yield strength is Q345 (15).To adding identical structural member between the upper tower arm in shaft tower tower window left side and lower tower arm, can obtain the utility model shaft tower tower window construction, see Fig. 7～8.
The intensity adopting in this detailed description of the invention is the angle steel of Q345, and cross section is L shaped, and cross sectional dimensions is 75mm × 5mm, and its structure as shown in Figure 9.
Test to illustrate the beneficial effects of the utility model below by simulation comparison.
First, set up respectively conventional wine glass-shaped tower structure and the utility model wine glass-shaped tower structure by the beam element BEAM188 of finite element analysis tool ANSYS, wherein, the size of beam element and material properties arrange according to shaft tower actual parameter.Then, calculate respectively conventional wine glass-shaped shaft tower and the utility model wine glass-shaped shaft tower tower arm stress distribution situation under identical unbalanced tensile force.
The unbalanced tensile force from wire and ground wire that shaft tower is subject to is equivalent in FEM (finite element) model the load applying in shaft tower corresponding connection node, and two kinds of shaft towers are applied to identical load.The load of every wire unbalanced tensile force equivalence is 60000N, and direction is along wire trend and face down into 30 degree angles with ground; The load of every ground wire unbalanced tensile force equivalence is 20000N, and direction is along wire trend and face down into 20 degree angles with ground.Four column foots of column foot part are equivalent to the displacement degree of freedom constraints of shaft tower to four nodes of column foot lowermost end in FEM (finite element) model to the fixation of shaft tower simultaneously.Concrete load and constraints apply position and see in Figure 10 shown in arrow.After having applied above-mentioned constraints and load, carry out FEM mechanics analysis by ANSYS analysis tool, obtain the displacement of each node and the stress of each unit in shaft tower.Because shaft tower is made up of angle steel Q235, the Q345 of two kinds of yield strengths, single suffered stress intensity analysis from angle steel unit, cannot intuitively react the degree of risk of shaft tower.A parameter of the utility model definition: stress percentage, be used for characterizing the ratio between the suffered stress in angle steel unit and this angle steel unit yield strength, stress percentage approaches or to exceed 1 unit more, and the degree of risk of shaft tower is just higher so.By calculating respectively the stress percentage of angle steel unit in two kinds of shaft tower FEM (finite element) model, can obtain 8 angle steel unit of stress percentage maximum separately, the stress percentage of these 8 angle steel unit is in table 1.
Two kinds of structure angle element stress percentage contrast tables of table 1
| ? | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Conventional shaft tower | 0.8143 | 0.7981 | 0.6056 | 0.5767 | 0.5028 | 0.5012 | 0.435 | 0.4288 |
| The utility model shaft tower | 0.5062 | 0.5043 | 0.4977 | 0.4962 | 0.4595 | 0.4415 | 0.4279 | 0.4104 |
analytical table 1 can be found, front 3 angle steel unit of conventional shaft tower stress percentage maximum, and its stress percentage is more much larger than all the other angle steel unit, shows that stress distribution is more concentrated; And 8 angle steel unit of the utility model shaft tower stress percentage maximum, its stress percent value is all similar, and all the angle steel unit of more conventional shaft tower reduces to some extent, shows that stress distribution is more even.As can be seen here, the utility model tower structure can obviously improve the stress distribution on tower window angle steel.
Claims (4)
1. the transmission line tower structure that can improve stress distribution, is applicable to wine glass-shaped electric power line pole tower, comprises tower window, it is characterized in that;
Between the upper tower arm inner side in tower window left side and the upper tower arm inner side on lower tower arm inner side and right side and lower tower arm inner side, be equipped with the structural member that improves stress distribution, described structural member is fixed on the main material angle steel of tower arm inner side and lower tower arm inner side.
2. transmission line tower structure as claimed in claim 1, is characterized in that:
Described structural member is that yield strength is the angle iron component of Q345.
3. transmission line tower structure as claimed in claim 1, is characterized in that:
Described structural member is the rectangle framework angle iron component that diagonal is provided with intersection angle steel.
4. transmission line tower structure as claimed in claim 3, is characterized in that:
Described structural member comprises two parallel vertical angle steel, two parallel horizontal angle steel, an oblique long angle steel and two oblique angle cleats; The angle steel of upper tower arm inner side comprises the first angle steel (2) and the second angle steel (4), the angle steel of lower tower arm inner side comprises triangular steel (3) and the 4th angle steel (5), the first angle steel (2) is connected with triangular steel (3), and the second angle steel (4) is connected with the 4th angle steel (5);
Two vertical angle steel two ends are individually fixed on four angle steel of tower arm inner side and lower tower arm inner side, and two horizontal angle steel two ends are also individually fixed on four angle steel of tower arm inner side and lower tower arm inner side on tower window, vertical angle steel and horizontal angle steel formation rectangle framework;
Oblique long angle steel two ends are individually fixed in the first angle steel (2) and the 4th angle steel (5) is upper, and form the diagonal of described matrix framework; The two ends of the first oblique angle cleat in two oblique angle cleats are individually fixed in the center range of triangular steel (3) and oblique long angle steel, and the two ends of the second oblique angle cleat are individually fixed in the center range of the second angle steel (4) and oblique long angle steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320879756.9U CN203742239U (en) | 2013-12-30 | 2013-12-30 | Electric transmission line tower structure capable of improving stress distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320879756.9U CN203742239U (en) | 2013-12-30 | 2013-12-30 | Electric transmission line tower structure capable of improving stress distribution |
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| Publication Number | Publication Date |
|---|---|
| CN203742239U true CN203742239U (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320879756.9U Expired - Fee Related CN203742239U (en) | 2013-12-30 | 2013-12-30 | Electric transmission line tower structure capable of improving stress distribution |
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| CN (1) | CN203742239U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105045997A (en) * | 2014-08-26 | 2015-11-11 | 国家电网公司 | Nonlinear flexible component stress calculation method capable of being free from restriction of hardware cost |
-
2013
- 2013-12-30 CN CN201320879756.9U patent/CN203742239U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105045997A (en) * | 2014-08-26 | 2015-11-11 | 国家电网公司 | Nonlinear flexible component stress calculation method capable of being free from restriction of hardware cost |
| CN105095575A (en) * | 2014-08-26 | 2015-11-25 | 国家电网公司 | Stress calculation method for no-linear flexible members without influence of external environmental factors |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20141230 |
|
| EXPY | Termination of patent right or utility model |