CN201574611U - Flat ground-type ultrahigh-voltage double-circuit power-output iron tower - Google Patents
Flat ground-type ultrahigh-voltage double-circuit power-output iron tower Download PDFInfo
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- CN201574611U CN201574611U CN2009202580468U CN200920258046U CN201574611U CN 201574611 U CN201574611 U CN 201574611U CN 2009202580468 U CN2009202580468 U CN 2009202580468U CN 200920258046 U CN200920258046 U CN 200920258046U CN 201574611 U CN201574611 U CN 201574611U
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Abstract
The utility model discloses a flat ground-type ultrahigh-voltage double-circuit power-output iron tower, which includes a tower body, a tower head and lead wires, wherein double-circuit lead wires are arranged on two sides of the tower body; the tower head includes an upper crossarm, a middle crossarm and a lower crossarm, insulator strings are arranged at two ends of the upper crossarm as well as at two ends of the lower crossarm, V-shaped insulator strings are arranged at two ends of the middle crossarm, and the phase conductors are hung on upper insulator strings, the middle insulator strings and the lower insulator strings; and the lower insulator strings adopt I-shaped insulator strings, and the upper crossarm, the middle crossarm and the lower crossarm are symmetrically arranged on two sides of the tower body. By adopting the technical scheme, the utility model has the advantages: the V-shaped insulator strings and the I-shaped insulator strings are mixed and adopted on the same tower, the corridor is narrower, and the local adoption of the V-shaped insulator strings has little influence on the weight of the rod tower, and the investment in the body is relatively reduced.
Description
Technical field
The utility model relates to a kind of transmission facility, relates to a kind of two circuit iron tower of level land super-pressure that is applicable to specifically.
Background technology
The tangent tower of the most usefulness of iron tower in the current power transmission line project, common used tower is to adopt the vertically arranged shaft tower of three-phase conducting wire, adopt the vertically arranged shaft tower pattern of three-phase conducting wire to mainly contain drum type at present, umbellate form, several forms such as fly swatter type, fly swatter type double loop iron tower six phase conductors are all in same tower window, by compressing alternate horizontal range, reduced the circuit corridor, but its tower head size is bigger, complex structure, the tower head force structure is unreasonable, single tower index is higher, and the body investment is bigger, and this arrangement safety reliability is low, in case accident appears in a loop, will suffer disaster simultaneously in another loop.Be not suitable for the electric parameter requirements such as distance to the ground, Insulation Coordination and angle of oscillation of 500KV supertension line.And forms such as present drum type and umbellate form, used insulator string has two kinds of patterns: I type insulator string and V-type insulator string.When adopting the insulator pattern, all adopt V-type insulator string or I type insulator string for the double loop overhead transmission line, I type insulator string has simple in structure, construct, move advantage easily, and tangent tower cross-arm length is short than V string tangent tower, use in building the 500kV engineering extensively, but I type insulator string does not have restrictive function to the skew of lead, the whole width of corridor of I type insulator string shaft tower is wide, establish housing demolition around the circuit auxilliary like this, the trees felling is more; The V-type insulator string has restrictive function to the skew of lead, the whole width of corridor of V-type insulator string shaft tower is less than the width of corridor of I type string, can reduce housing demolition like this, reduce trees felling etc., but its lead cross-arm is longer than I type insulator string shaft tower lead cross-arm, and the shaft tower interlamellar spacing increases, so iron tower Dan Ji is heavier, and V-type insulator string insulator quantity doubles than I type string, has increased the body investment.
Summary of the invention
The purpose of this utility model just is to overcome above-mentioned deficiency and provides a kind of and reduce cost and less super-pressure double loop, the level land electric power pylon of width of corridor of shaft tower.
The purpose of this utility model can realize by following technical measures:
Super-pressure double loop, a kind of level land electric power pylon, it comprises body of the tower, tower head and lead, the double loop wire arrangements is in the body of the tower both sides, tower head comprises upper strata cross-arm, middle level cross-arm and the lower floor's cross-arm that is distributed in the body of the tower both sides, the both ends of this upper strata cross-arm and lower floor's cross-arm are provided with insulator string respectively, the both ends of middle level cross-arm are provided with the V-type insulator string, and the upper, middle and lower insulator string hangs a phase conductor respectively.
Super-pressure double loop, above-mentioned level land electric power pylon, described lower floor insulator string is an I type insulator string.
Super-pressure double loop, above-mentioned level land electric power pylon, described upper strata cross-arm, middle level cross-arm and lower floor's cross-arm are to be symmetrically distributed in the body of the tower both sides.
Adopt technique scheme, the utility model has following advantage: mix on same tower and adopt V-type insulator string and I insulator string, the corridor is narrower, and the local V-type insulator string that adopts is less to the influence of shaft tower weight, and the body investment increases less relatively.
According to the electric parameter requirements such as distance to the ground, Insulation Coordination and angle of oscillation of this engineering 500kV supertension line, be comparable factor with equal service condition, claim highly to be that 36 meters 2 type tangent towers are example, the worker to exhale
Journey is gone here and there to full V, full I string, and three kinds of shaft tower patterns of middle phase V string are arranged result such as table 1.
Table 1 is three kinds of comprehensive comparison sheets of tower
By finding out among the figure, the lead cross-arm that full V tower three-phase conducting wire cross-arm is arranged than other two kinds of tower heads is grown 2 ~ 4 meters, and other two kinds of tower heads of conductor layer gap ratio are arranged high 2.5 ~ 3 meters.Full V Tata area of bed is big, and the tower head area that keeps out the wind increases, and body of the tower master material increases because of the stress that wind load produces, and the specification of body of the tower master material increases, and tower weight increases.Full V tower interlamellar spacing increases, and lead wire and earth wire tension force produces moment of flexure to every section main material of tower head and increases, and tower head master material increases, and tower weight increases.In addition, because interlamellar spacing increases, tower head part weight is owing to size increases, and cross-arm length increases, and cross-arm weight is because the size increase also increases, and comprehensively these several, full V Tata is heavy the heaviest; And owing to all adopt the V string, insulator quantity is more, the body investment that therefore full V string is arranged at most, but its circuit corridor is less relatively, and has adopted and limited the lead windage yaw behind the V string and also reduced width of corridor.
Two kinds of shaft towers of full I string and the middle string of V mutually, though cross-arm length and conductor layer spacing have difference slightly, but it is suitable substantially to integrate single basic tower weight, difference is little, but middle phase V boom tower is because the V string has been adopted in the part, the insulator quantity every base of full I boom tower of comparing increases by 1, so the full I boom of body output investment ratio tower all increases to some extent, increases by 0.65 ten thousand yuan.But middle phase V boom tower is owing to adopt the V string, its limit lead maximum horizontal range is compared reduction to some extent with full I string, dwindle 3.5m, therefore the phase V boom tower full I boom tower of comparing in, in the situation that single basic shaft tower body foundation of investment remains unchanged, reduced the unit transmission capacity that circuit width of corridor 17% has improved circuit.
Compare with full V boom tower, middle phase V boom tower limit lead horizontal range is dwindled about 1m, though after considering the lead windage yaw, the dynamic line corridor of middle phase V boom tower shaft tower can increase to some extent, but the shaft tower tower weight is lighter, insulator quantity is used less relatively, and the full V boom of the basic shaft tower body of the list output investment ratio tower of middle phase V boom tower reduces about 17% respectively.
In sum, middle phase V boom tower formula circuit corridor is narrower, and the body investment is less, unit transmission capacity height.
The area, level land generally is the key area of socio-economic development, populous, the corridor is narrow, though with regard to this engineering, location, the level land population of circuit process is comparatively rare, economical and undeveloped, the circuit corridor is unrestricted substantially, but considers later socio-economic development, must reduce the corridor as much as possible, economize the land resource,, reduce the body investment simultaneously as much as possible for future development stays big as far as possible space.Comprehensive above factor be V-type insulator, following phase mutually in the level land section recommends to adopt with on be the tangent suspension tower of I type insulator mutually.
Description of drawings
Fig. 1 is the structural representation that tower head adopts the V string entirely;
Fig. 2 is the structural representation that tower head adopts the I string entirely;
Fig. 3 is the utility model tower head structural representation.
The specific embodiment
Super-pressure double loop, a kind of level land electric power pylon as shown in Figure 3, it comprises body of the tower 1, tower head 2 and lead, the double loop wire arrangements is in body of the tower 1 both sides, tower head 2 comprises upper strata cross-arm 3, middle level cross-arm 4 and the lower floor's cross-arm 5 that is distributed in the body of the tower both sides, the both ends of horizontal 3 loads in this upper strata and lower floor's cross-arm 5 are provided with insulator string 6 respectively, the both ends of middle level cross-arm 4 are provided with V-type insulator string 7, and the upper, middle and lower insulator string hangs a phase conductor respectively.
The utility model lower floor insulator string is an I type insulator string, can also be that other insulator strings can both be realized effect of the present utility model.
Preferred version of the present utility model is that upper strata cross-arm, middle level cross-arm and lower floor's cross-arm are to be symmetrically distributed in the body of the tower both sides.
Claims (3)
1. super-pressure double loop, level land electric power pylon, it comprises body of the tower, tower head and lead, the double loop wire arrangements is in the body of the tower both sides, it is characterized in that: tower head comprises upper strata cross-arm, middle level cross-arm and the lower floor's cross-arm that is distributed in the body of the tower both sides, the both ends of this upper strata cross-arm and lower floor's cross-arm are provided with insulator string respectively, and the both ends of middle level cross-arm are provided with the V-type insulator string.
2. super-pressure double loop, level land according to claim 1 electric power pylon is characterized in that: described lower floor insulator string is an I type insulator string.
3. super-pressure double loop, level land according to claim 1 and 2 electric power pylon, it is characterized in that: described upper strata cross-arm, middle level cross-arm and lower floor's cross-arm are to be symmetrically distributed in the body of the tower both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202580468U CN201574611U (en) | 2009-11-12 | 2009-11-12 | Flat ground-type ultrahigh-voltage double-circuit power-output iron tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202580468U CN201574611U (en) | 2009-11-12 | 2009-11-12 | Flat ground-type ultrahigh-voltage double-circuit power-output iron tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201574611U true CN201574611U (en) | 2010-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202580468U Expired - Fee Related CN201574611U (en) | 2009-11-12 | 2009-11-12 | Flat ground-type ultrahigh-voltage double-circuit power-output iron tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201574611U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107869272A (en) * | 2016-09-23 | 2018-04-03 | 国家电网公司 | Tower of ± 800kV the extra-high voltage direct-currents with 330kV ultrahigh-voltage alternating-currents circuit with tower |
| CN107869271A (en) * | 2016-09-23 | 2018-04-03 | 国家电网公司 | Pyramidal structure of ± 1100kV the extra-high voltage direct-currents with 750kV ultrahigh-voltage alternating-currents circuit with tower |
-
2009
- 2009-11-12 CN CN2009202580468U patent/CN201574611U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107869272A (en) * | 2016-09-23 | 2018-04-03 | 国家电网公司 | Tower of ± 800kV the extra-high voltage direct-currents with 330kV ultrahigh-voltage alternating-currents circuit with tower |
| CN107869271A (en) * | 2016-09-23 | 2018-04-03 | 国家电网公司 | Pyramidal structure of ± 1100kV the extra-high voltage direct-currents with 750kV ultrahigh-voltage alternating-currents circuit with tower |
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Legal Events
| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100908 Termination date: 20161112 |