CN205805103U - A kind of 220kV double-layer horizontal strain insulator bores more tower - Google Patents
A kind of 220kV double-layer horizontal strain insulator bores more tower Download PDFInfo
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- CN205805103U CN205805103U CN201620503706.4U CN201620503706U CN205805103U CN 205805103 U CN205805103 U CN 205805103U CN 201620503706 U CN201620503706 U CN 201620503706U CN 205805103 U CN205805103 U CN 205805103U
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Abstract
The utility model discloses a kind of 220kV double-layer horizontal strain insulator and bore more tower, including tower leg, tower body.Tower body is cranked arm from above, lower bent lever, middle wire cross-arm and earth wire support composition, on crank arm, the number of lower bent lever and earth wire support is two, middle wire cross-arm is divided into middle wire cross-arm I and middle wire cross-arm II, two lower bent lever symmetries are fixed on above tower leg, middle wire cross-arm II two ends are fixed on the top of two lower bent levers, on crank arm and be fixed on above middle wire cross-arm I two ends, and position is corresponding with lower bent lever top, earth wire support is individually fixed in above the two ends of middle wire cross-arm I, the two ends of middle wire cross-arm I and middle wire cross-arm II are respectively provided with side cross-arm I and side cross-arm II, arranging on middle wire cross-arm hangs a little, hang on a little and be linked with jumper string, jumper string in splay insulator string by being connected to hang a little downward for a pair and is connected to hard jumping of splayed duplex hard jumper string lower end and forms.
Description
Technical field
This utility model relates to a kind of steel tower erected power transmission lines, and the brill more tower of more 500kV and above ac and dc circuit is directly bored on a kind of 220kV common-tower double-return road.
Background technology
In recent years, 220kV transmission line of electricity is mostly with common-tower double-return Lu Weizhu, and its tower structure mainly uses umbellate form or drum type version.Umbellate form or drum type tower structure are provided with four layers of cross-arm, including ground wire cross-arm from top to bottom, upper conductor cross-arm, middle wire cross-arm, lower wire cross-arm.Owing to the tower head size of its tower structure tower is higher, bore when getting over transmission line of electricity the most extremely difficult.When boring more 500kV and above ac and dc circuit, bore more point to be difficult to select, it is typically only capable to use 220kV circuit to detour, raises 500kV circuit or 220kV double back local becomes the mode of single time to realize boring more, but traditional technical scheme find bore more point difficulty itself, to relate to the great number of issues such as power failure, fiber optic cable communications, construction period during transformation longer, add operation investment, the shortcomings such as economy is poor simultaneously.
Utility model content
This utility model technical issues that need to address are to provide the Novel iron tower that a kind of tower head is low, can conveniently bore the 220kV transmission line of electricity of more 500kV transmission line of electricity.
For solving above-mentioned technical problem, this utility model be the technical scheme is that
nullA kind of 220kV double-layer horizontal strain insulator bores more tower，Including tower leg and be fixedly connected on the tower body above tower leg，Described tower body is mainly cranked arm from above、Lower bent lever、Middle wire cross-arm and earth wire support composition，Crank arm on described、The number of lower bent lever and earth wire support is two，Described middle wire cross-arm includes middle wire cross-arm I and middle wire cross-arm II，Said two lower bent lever symmetry is fixed on above tower leg，Middle wire cross-arm II two ends are fixed on the top of two lower bent levers，On crank arm and be fixed on above middle wire cross-arm I two ends，And position is corresponding with lower bent lever top，Earth wire support is individually fixed in above the two ends of middle wire cross-arm I，Crank arm on described、Lower bent lever and earth wire support are arranged with tower centrosymmetry，The two ends of described middle wire cross-arm I arrange side cross-arm I，Middle wire cross-arm II two ends arrange side cross-arm II，Two side cross-arms I、Two side cross-arms II、The middle part of middle wire cross-arm I and middle wire cross-arm II is respectively provided with and hangs a little，Hang on a little and be linked with jumper string，Described jumper string is connected to, by a pair, downward firmly the jumping with the level being connected to splayed duplex hard jumper string lower end in the hard jumper string of splayed duplex hung a little and forms.
Further improvement is that of technical solutions of the utility model: the length 1m longer than the length of side cross-arm I of described side cross-arm II.
Further improvement is that of technical solutions of the utility model: in the middle part of described middle wire cross-arm I hang a little with middle wire cross-arm II in the middle part of a relative distance that hangs be 1m.
Further improvement is that of technical solutions of the utility model: two earth wire supports are that corner shape is symmetrical arranged with tower center, the length sum of two side cross-arms II at described middle wire cross-arm II and two ends is equal to the length between two outer faces of earth wire support.
Further improvement is that of technical solutions of the utility model: the described hard jumper string of splayed duplex is composite insulator, often group jumper string is 2m with the dot spacing that hangs of middle wire cross-arm junction.
Further improvement is that of technical solutions of the utility model: described earth wire support apogee distance ground is 23m, and the distance between two outer faces of earth wire support is 16m, and the distance between two side cross-arms II is 16m.
Further improvement is that of technical solutions of the utility model: the distance of described earth wire support and middle wire cross-arm II is 5:6 with the distance ratio of middle wire cross-arm II and tower leg.
Owing to have employed technique scheme, the technological progress that this utility model obtains is:
This utility model is used for setting up two-way 220kV transmission line of electricity; can conveniently bore more 500kV transmission line of electricity; and can use as angle tower owing to cross-arm has certain width; and compress tower head height on the premise of the aspects such as electric clearance, lightning protection, Insulation Coordination, electromagnetic environment can be met as far as possible; and the 220kV double-layer horizontal strain insulator formed bores more tower; this brill more tower can directly bore more exhales a height of 33m and above tangent tower; need not 500kV circuit is carried out any transformation, convenient construction and operation.Owing to this utility model is that 0-90 degree angle tower can optimize line route, therefore bores more point selection and be very easy to.
This utility model uses two crank supports, and this pylon is arranged more succinct, and rolled steel dosage is less；Article two, the distance (root is opened) between cranking arm is bigger, and basis power is relatively smaller, and base concrete and quantity of reinforcement are less, more less than four lower limb pattern earthwork excavated volumes of traditional wine cup type pylon, it is possible to decrease overall economic indicator.
What this utility model related to bore more hanging of tower a little is divided into horizontal duplex, and upper strata hang position a little and lower floor hangs the horizontal-shift 1m in vertical dimension of position a little.Take into account in ice-covering area, between the adjacent lead wire and earth wire of levels, hang uneven distribution a little, when reducing coating ice falling, flashover between lead wire and earth wire occurs because blowing.
The double-layer horizontal strain insulator that this utility model relates to bores to be got in tower, and the length of two side cross-arms II at middle wire cross-arm II and two ends is equal to the length between two outer faces of earth wire support.In double loop or multiloop, the line of earth wire support and vertical direction is 0 degree with the angle on cross-arm and vertical direction, it is ensured that on ultra-high-tension power transmission line, shielding angle is the least so that the safety coefficient of transmission of electricity is the highest.
The 220kV double-layer horizontal strain insulator that this utility model relates to bores the hard jumper string of splayed duplex of more tower, compared with traditional hard jumper string of duplex, shorten jumper string and hang a little to the distance between bridle wirer carrying pole, make electrical body contraction in length, effectively reduce the height of jumper string, increase lower phase wire jumper distance to the ground, both met electric insulation clearance requirement, also steel tower is made to exhale high reduction further, so that boring the most convenient.
The hard jumper string of splayed duplex of the present utility model is composite insulator, composite insulator is made up of epoxy glass fiber due to axle, its tensile strength is 1.5 times of ordinary steel, it it is 3-4 times of high-strength magnetic, axial tension is the strongest, and there is stronger vibration absorption ability, shock resistant damping performance is the highest, for the 1/7-1/10 of porcelain insulator.Meanwhile, composite insulator has hydrophobicity, and when raining, the umbrella shape corrugated surface at composite insulator will not bedew formation moisture film, but becomes globule shape drippage, is difficult to constitute conductive channel, and its pollution flashover voltage is higher, for 3 times of same electric pressure porcelain insulator.
This utility model reasonable in design, stress are safe and reliable, reduce further tower head and the proportion requirement of tower body, have lower tower head and require with the horizontal-shift distance of adjacent wires to ground wire spacing, ground wire with tower body height, span central authorities.
Accompanying drawing explanation
Fig. 1 is the front view that this utility model bores more tower；
Fig. 2 is the side view of Fig. 1；
Fig. 3 is the top view of Fig. 1；
Fig. 4 is the schematic diagram that this utility model bores the most single time 500kV circuit；
Fig. 5 is the top view of Fig. 4；
Wherein, 1, tower leg, 2, lower bent lever, 3, crank arm on, 4, middle wire cross-arm, 4-1, middle wire cross-arm I, 4-2, middle wire cross-arm II, 5, interior angle side cross-arm, 5-1, side cross-arm I, 5-2, side cross-arm II, 7, firmly jump, 8, the hard jumper string of splayed duplex, 9, earth wire support, 10,220kV double-layer horizontal strain insulator bore more tower, 11,500kV tangent tower, 12,500kV anchor support, 13,500kV power transmission line.
Detailed description of the invention
Below in conjunction with embodiment, this utility model is described in further details:
As it is shown in figure 1, a kind of 220kV double-layer horizontal strain insulator bores more tower, two lower bent levers being connected with tower leg 1 including two tower legs 12, two are cranked arm wire cross-arm 4 and two band ground wires in 3, two groups hang earth wire support 9 a little.On crank arm 3 top be fixedly connected on middle wire cross-arm I 4-1, the top of lower bent lever 2 is fixedly connected on middle wire cross-arm II 4-2, middle wire cross-arm I 4-1 and middle wire cross-arm II 4-2 is parallel, the two ends of middle wire cross-arm I 4-1 are respectively provided with side cross-arm I 5-1, the two ends of middle wire cross-arm II 4-2 are respectively provided with side cross-arm II 5-2, two are cranked arm 3 top be provided with two band ground wires and hang earth wire support 9 a little.At middle wire cross-arm I 4-1, the middle part of two side cross-arm I 5-1, two side cross-arm II 5-2, middle wire cross-arm I 4-1 and middle wire cross-arm II 4-2 is fixedly installed respectively and hangs a little, and each hangs on a little and is linked with jumper string, altogether six groups of jumper strings.
The jumper string that this utility model uses firmly is jumped 7 by the level being connected to the downward hard jumper string of splayed duplex 8 that hangs a little and the lower end that is connected to the hard jumper string of splayed duplex 8 for a pair and is formed, and often the dot spacing that hangs of group jumper string and middle wire cross-arm 4 is 2m.Shorten jumper string than traditional hard jumper string of duplex and hang a little to the distance between bridle wirer carrying pole, make electrical body contraction in length, effectively reduce the height of jumper string, increase lower phase wire jumper distance to the ground, both electric insulation clearance requirement had been met, also steel tower is made to exhale high reduction further, so that boring the most convenient.
Earth wire support 9 apogee distance ground of the present utility model is 23m, and the distance between two outer faces of the earth wire support 9 boring Yue Ta two ends is 16m, and the distance between two side cross-arm II 5-2 is 16m；Meanwhile, in earth wire support 9 of the present utility model and lower floor, the distance ratio of the distance of wire cross-arm 4 and wire cross-arm in lower floor 4 with tower leg 1 is 5:6.This utility model reasonable in design, stress are safe and reliable, reduce further tower head and the proportion requirement of tower body, have lower tower head with tower body height, span central authorities to ground wire spacing.Meanwhile, tower leg 1 of the present utility model, lower bent lever 2, on crank arm 3, middle wire cross-arm 4 and earth wire support 9 be angle steel composition truss structure, tower structure symmetrically got over by whole brill.
As shown in Fig. 4, Fig. 5, at newly-built 220kV multiple-circuit on same tower with 500kV crossing elimination, in 500kV circuit both sides, each vertical base 220kV double-layer horizontal strain insulator bores more tower, by adjust bore more tower exhale height, the corner number of degrees, to parameters such as the distances of 500kV steel tower, can realize boring more.Fig. 4 and Fig. 5 is as a example by boring the most single time 500kV circuit, and this brill more tower is equally applicable to bore more 2 times parallel 500kV circuits.
Claims (7)
- null1. a 220kV double-layer horizontal strain insulator bores more tower，Including tower leg (1) and be fixedly connected on tower leg (1) top tower body，Described tower body is mainly cranked arm (3) from above、Lower bent lever (2)、Middle wire cross-arm (4) and earth wire support (9) composition，It is characterized in that: crank arm on described (3)、The number of lower bent lever (2) and earth wire support (9) is two，Described middle wire cross-arm (4) includes middle wire cross-arm I (4-1) and middle wire cross-arm II (4-2)，Said two lower bent lever (2) symmetry is fixed on tower leg (1) top，Middle wire cross-arm II (4-2) two ends are fixed on the top of two lower bent levers (2)，On crank arm (3) be fixed on above middle wire cross-arm I (4-1) two ends，And position is corresponding with lower bent lever (2) top，Earth wire support (9) is individually fixed in above the two ends of middle wire cross-arm I (4-1)，Crank arm on described (3)、Lower bent lever (2) and earth wire support (9) are arranged with tower centrosymmetry，The two ends of described middle wire cross-arm I (4-1) arrange side cross-arm I (5-1)，Middle wire cross-arm II (4-2) two ends arrange side cross-arm II (5-2)，Two side cross-arms I (5-1)、Two side cross-arms II (5-2)、The middle part of middle wire cross-arm I (4-1) and middle wire cross-arm II (4-2) is respectively provided with and hangs a little，Hang on a little and be linked with jumper string，Described jumper string is by being connected to the downward hard jumper string of the splayed duplex (8) that hangs a little for a pair and being connected to the hard jumper string of splayed duplex (8) The level of lower end jumps (7) composition firmly.
- A kind of 220kV double-layer horizontal strain insulator the most according to claim 1 bores more tower, it is characterised in that: the length of described side cross-arm II (5-2) is than the long 1m of length of side cross-arm I (5-1).
- A kind of 220kV double-layer horizontal strain insulator the most according to claim 2 bores more tower, it is characterised in that: described middle wire cross-arm I (4-1) middle part hang a little with middle wire cross-arm II (4-2) in the middle part of a relative distance that hangs be 1m.
- A kind of 220kV double-layer horizontal strain insulator the most according to claim 3 bores more tower, it is characterized in that: two earth wire supports (9) are that corner shape is symmetrical arranged with tower center, the length sum of two side cross-arms II (5-2) at described middle wire cross-arm II (4-2) and two ends is equal to the length between two outer faces of earth wire support (9).
- A kind of 220kV double-layer horizontal strain insulator the most according to claim 4 bores more tower, it is characterised in that: the hard jumper string of described splayed duplex (8) is composite insulator, and often group jumper string is 2m with the dot spacing that hangs of middle wire cross-arm (4) junction.
- A kind of 220kV double-layer horizontal strain insulator the most according to claim 5 bores more tower, it is characterized in that: described earth wire support (9) apogee distance ground is 23m, distance between two outer faces of earth wire support (9) is 16m, and the distance between two side cross-arms II (5-2) is 16m.
- 7. bore more tower according to a kind of 220kV double-layer horizontal strain insulator described in any one of claim 1-6, it is characterised in that: the distance of described earth wire support (9) and middle wire cross-arm II (4-2) is 5:6 with the distance ratio of middle wire cross-arm II (4-2) and tower leg (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620503706.4U CN205805103U (en) | 2016-05-30 | 2016-05-30 | A kind of 220kV double-layer horizontal strain insulator bores more tower |
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| CN201620503706.4U CN205805103U (en) | 2016-05-30 | 2016-05-30 | A kind of 220kV double-layer horizontal strain insulator bores more tower |
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| CN205805103U true CN205805103U (en) | 2016-12-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113090095A (en) * | 2021-03-18 | 2021-07-09 | 国核电力规划设计研究院有限公司 | Loop crossing tower and loop crossing line |
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2016
- 2016-05-30 CN CN201620503706.4U patent/CN205805103U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113090095A (en) * | 2021-03-18 | 2021-07-09 | 国核电力规划设计研究院有限公司 | Loop crossing tower and loop crossing line |
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| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170103 Address after: 050031 Changan District, Hebei, China, North Street, building No. 6, No. Patentee after: Hebei Electric Power Design & Research Institute Patentee after: Ningxia Hui Autonomous Region Electric Power Design Institute Address before: 050031 Changan District, Hebei, China, North Street, building No. 6, No. Patentee before: Hebei Electric Power Design & Research Institute |