CN106836935A - A kind of upper font E glass-epoxies cross-arm tower - Google Patents
A kind of upper font E glass-epoxies cross-arm tower Download PDFInfo
- Publication number
- CN106836935A CN106836935A CN201710184100.8A CN201710184100A CN106836935A CN 106836935 A CN106836935 A CN 106836935A CN 201710184100 A CN201710184100 A CN 201710184100A CN 106836935 A CN106836935 A CN 106836935A
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- Prior art keywords
- tower
- insulator
- tower body
- cross
- oblique pull
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- 239000004593 Epoxy Substances 0.000 title claims abstract description 22
- 229920000647 polyepoxide Polymers 0.000 title claims abstract description 17
- 239000012212 insulator Substances 0.000 claims abstract description 99
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 59
- 239000010959 steel Substances 0.000 claims abstract description 59
- 239000002131 composite material Substances 0.000 claims abstract description 55
- 150000001875 compounds Chemical class 0.000 claims abstract description 16
- 238000009413 insulation Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 16
- 239000011152 fibreglass Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 9
- 238000005452 bending Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/24—Cross arms
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Insulators (AREA)
Abstract
The invention discloses a kind of upper font E glass-epoxies cross-arm tower, including tower leg, tower body and the tower head being sequentially connected with；Also include being arranged at three groups of tower body side by oblique pull insulator and the molecular composite material cross arm of post insulator, three groups of cross-arms are distributed in tower body both sides into upper font；Every group of compound cross-arm includes two oblique pull insulators and two support insulators and steel hanging point device；One end of the oblique pull insulator is connected with the tower body, and the other end is connected with one end of the support insulator, and the other end of the support insulator is connected with the tower body, and its tie point is located at the lower section of the oblique pull insulator and the tower body tie point；One end that the support insulator is connected with the oblique pull insulator is provided with connection steel hanging point device；On the premise of wire distance to the ground is ensured, the tower structure that the present invention is provided reduces tower height, line corridor width is reduced, so as to reduce shaft tower tower weight and pole and tower foundation.
Description
【Technical field】
The present invention relates to transmission line of electricity technical field, more particularly to a kind of upper font E glass-epoxies are (referred to as
Composite) cross-arm tower.
【Background technology】
Refer to shown in Fig. 1, current power transmission tower structure mainly uses all-steel structure, expend great deal of steel, consume
The substantial amounts of mineral products energy, causes the severe contamination of ecological environment.And overhead line structures use all-steel structure, exist quality weight,
The problems such as construction transport and difficult operation maintenance, therefore turn into a kind of new trend in transmission tower field using novel tower material.
Composite (FRP) is due to good with high-strength, lightweight, corrosion-resistant, handling ease, designability and insulating properties
The advantages of, increasingly paid attention to by engineering circles, it is that substitution steel build defeated especially for power transmission and transformation industry engineer applied institute pro-gaze
One of ideal material of electric pole tower structure.In recent years, with the further reduction and the continuous progress of technique of composite cost,
The research of domestic composite material pole tower is increasing, and gradually ripe.
For composite material pole tower, research both domestic and external in the past is concentrated mainly in " single lever-type ", in recent years, to lattice
Research also gradually increase, the elastic modelling quantity and compression strength that this is primarily due to composite be relatively low, and single pole structure is held
Carry the strength and stiffness requirement that power is difficult to meet the big load shaft tower of high voltage, therefore extra-high voltage and extra high voltage network composite wood
Material tower should be using the structural shape of " lattice ".But lattice composite material pole tower, but have suspension electricity on cross-arm centre position
Position produces, more long with respect to cross-arm length；Using all-steel structure, bending effect of the load to shaft tower is big, influence tower structure
Stability and service life.
【The content of the invention】
It is an object of the invention to provide a kind of upper font E glass-epoxies cross-arm tower, to reduce conductor load pair
The bending effect of shaft tower, so as to reduce tower weight, saves material, effectively reduces construction costs.
To reach above-mentioned purpose, the present invention is adopted the following technical scheme that and is achieved：
A kind of upper font E glass-epoxies cross-arm tower, including tower leg, tower body and the tower head being sequentially connected with；Also wrap
Include and be arranged at three groups of shaft tower side by oblique pull insulator and the molecular composite material cross arm of post insulator, three groups of cross-arms are into upper
Font is distributed in tower body both sides；Every group of compound cross-arm includes two oblique pull insulators and two support insulators and connection steel
Hanging point device；One end of the oblique pull insulator is connected with the tower body, and the other end is connected with one end of the support insulator,
The other end of the support insulator is connected with the tower body, and its tie point is connected positioned at the oblique pull insulator with the tower body
The lower section of point；One end that the support insulator is connected with the oblique pull insulator is provided with connection steel hanging point device；The branch
Post insulator is not less than the tie point of the support insulator and the tower body with the tie point of the oblique pull insulator.
Further, the oblique pull insulator be flexible piece, two ends by U-shaped ring connector respectively with steel hanging point device and tower
Body bolt connection.
Further, the support insulator is rigid member, and support insulator includes composite element, composite element
The steel sleeve at two ends and cross plate connector；Two composite end steel sleeves with steel hanging point device bolt connection,
The root steel sleeve and cross plate connector of two composites are bolted with tower body；Its one end and the tower body
Connected with steel plate.
Further, the oblique pull insulator is located at tower body middle part or tower body lateral surface with the tie point of the tower body.
Further, the support insulator is located at tower body middle part or tower body lateral surface with the tie point of the tower body.
Further, the oblique pull insulator or the support insulator are front and rear two, steel hanging point device with it is described
It is approximate V-shaped after being connected between two oblique pull insulators or two described support insulators.
Further, full skirt is carried on described oblique pull insulator and support insulator；Oblique pull insulator and post insulator
Sub- upper end is equipped with grading ring.
Further, it is combined component of the cross-arm in by electric clearance and insulation distance coverage and uses composite structure
Part, the material of the composite element is fiberglass.
Upper font E glass-epoxies cross-arm tower of the invention, including tower leg, tower body and the tower head being sequentially connected with；
Also include being arranged at three groups of shaft tower side by oblique pull insulator and the molecular composite material cross arm of post insulator, using compound
Material cross-arm mitigates bending effect of the load to shaft tower, while compensate for the deficiency of material stiffness by the rigidity of structure, increased
The rigidity and bearing capacity of composite material tower, are easy in high pressure, super-pressure and popularization and application in UHV transmission line engineering, greatly
Width reduces width of corridor, reduces tower weight, saves material, effectively reduces construction costs.
Further, steel bushing tubular type node, U-shaped ring connector and cross plate connector are solidified respectively by resin
It is connected to support insulator, tension composite insulator termination.The earth wire support of upper font E glass-epoxies cross-arm tower with
Ground wire connects, and earth wire support is connected with tower body steel structure, is grounded under drawing, and reaches the mesh ground of lightning protection；By ensureing that wire is hung
Point is satisfied by insulation distance to reach the purpose of tower head insulation to the distance of any metalwork；Space truss is constituted by each component
System transmits load；By the full skirt on composite element surface, increase the retting-flax wastewater of cross-arm；Electric field is improved by grading ring
Distribution.
Relative to prior art, the present invention has further the advantage that：
1st, width of corridor is saved:Compared with conventional angle steel wineglass tower, width of corridor saves 21.2m, up to 52%, advantageously reduces
Housing demolition amount and saving land resource；
2nd, low cost：Compared with conventional angle steel wineglass tower, steel tower weight reduction about 15.22%, base concrete side's amount drop
It is low by 9.3%, comprehensive cost reduction about 6%；
3rd, pattern is attractive in appearance：Employ it is follow-on upwarp font schemes on cross-arm, pattern is graceful, simple structure.
4th, windage yaw discharge accident probability is reduced：Due to make use of the insulation characterisitic of composite, transmission tower knot is eliminated
The suspension insulator of structure, reduces power transmission circuit caused by windage pollution flashover accident probability, improves line security operation level；
5th, it is convenient to be grounded：By rational arrangement so that steel construction part is continuous, the purpose of ground connection lightning protection is realized.
6th, operation expense is low：There is corrosion-resistant, high-low temperature resistant due to composite, the characteristics of stolen possibility is small,
Reduce the maintenance cost of circuit.
【Brief description of the drawings】
Fig. 1 is the structural representation of traditional all-steel wine glass-shaped transmission tower；
Fig. 2 is the upper font E glass-epoxy cross-arm tower line charts of the present invention；
Fig. 3 is the upper font E glass-epoxy cross-arm tower electrical installation schematic diagrams of the present invention；
Fig. 4 a are the upper font E glass-epoxy cross-arm tower cross-arm front views of the present invention；
Fig. 4 b are the upper font E glass-epoxy cross-arm tower cross-arm top views of the present invention；
In figure：Support insulator 1, oblique pull insulator 2, earth wire support 3, tower body 4, tower leg 6, steel hanging point device 10, first
Steel sleeve 11, the second steel sleeve 12, cross plate connector 13, grading ring 14, U-shaped ring connector 15.
【Specific embodiment】
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Refer to Fig. 2, upper font E glass-epoxies cross-arm tower line chart of the invention, including three sets of composite woods
Material cross-arm, two sets of steel construction earth wire supports 3 and tower body 4, tower leg 6.
Three sets of composite material cross arms are arranged at the side of tower body 4, and three sets are made up of oblique pull insulator 2 and support insulator 1
Compound cross-arm along tower body axis by upper font arrange.Often set composite material cross arm includes two oblique pull insulators, 2, two pillars
Insulator 1 and a set of steel hanging point device 10.
One end of the oblique pull insulator 2 is connected with the tower body 4, and the other end connects with one end of the support insulator 1
Connect, the other end of the support insulator 1 is connected with the tower body 4, its tie point is located at the oblique pull insulator 2 and the tower
The lower section of the tie point of body 4；One end that the support insulator 1 is connected with the oblique pull insulator 2 is provided with connection steel hanging point dress
Put 10；The support insulator 1 is not less than the support insulator 1 with the tower body 4 with the tie point of the oblique pull insulator 2
Tie point.Support insulator 1 is located at tower with the tie point and oblique pull insulator 2 of the tower body 4 with the tie point of the tower body 4
The middle part of body 4 or the lateral surface of tower body 4.
Refer to shown in Fig. 4 a and Fig. 4 b, support insulator 1 includes composite element, composite element two ends difference
It is provided with the first steel sleeve 11 and the second steel sleeve 12 and cross plate connector 13.
Composite material cross arm includes two support insulators 1, the second steel sleeve 12 of two support insulators 1 and cross
Plate connector 13 is connected by bolt with steel hanging point device 10；Grading ring 14 is fixed with second steel sleeve 12.Two
The steel sleeve 11 of support insulator 1 and cross plate connector 13 are fixedly connected with tower body 4.10, two branch of steel hanging point device
It is approximate " V "-shaped after being connected between post insulator 1.
The two ends of composite oblique pull insulator 2 are solid with steel hanging point device 10 and tower body 4 respectively by U-shaped ring connector 15
Fixed connection.
Composite support insulator 1, the material of composite oblique pull insulator 2 are fiberglass.
Steel hanging point device 10 includes steel pipe, some pieces of connecting plates, two pieces of thread gripping-boards and a stiffeners.
Steel construction earth wire support 3 and tower body 4 are constituted by some angle iron components.Steel construction earth wire support 3 connects with ground wire,
Steel construction earth wire support is connected with tower body 4, and steel construction earth wire support is electrically connected with tower body 4.
Component of the compound cross-arm in by electric clearance and insulation distance coverage uses composite element, described
The material of composite element is fiberglass.
According to the upper font E glass-epoxies cross-arm tower that above-mentioned technical proposal is realized, by resin by steel sleeve
Formula node, termination flange, U-shaped ring connector and cross plate connector solidify be connected to composite post insulator respectively
Son, composite inclined sliding insulator termination, blending bolt are integral by composite support insulator, the connection of composite inclined sliding insulator,
Constitute composite material cross arm.The deficiency of material stiffness is compensate for by the rigidity of structure, the rigidity of composite material tower is increased and is held
Power is carried, is easy in high pressure, super-pressure and popularization and application in UHV transmission line engineering.
(1) composite element end coupling
Composite element end coupling is all-steel structure, by resin by steel connector-steel bushing tubular type section
Point, U-shaped ring connector and cross plate connector solidify that to be connected to composite support insulator, compound oblique pull exhausted respectively
Edge termination.
(2) compound material insulation cross-arm
By bolt by composite element end coupling by two composite support insulators, two composites
Oblique pull insulator and the connection of a set of conducting wire hanging point device are integral, constitute compound material insulation cross-arm.
(3) Force principle of the compound cross-arm tower of font on
The compound cross-arm tower of upper font is a space truss system system, and it is to utilize composite insulation characterisitic in itself,
The purpose of insulation is realized, while the full skirt for passing through surface, increases the retting-flax wastewater of cross-arm；Electric Field Distribution is improved by grading ring.
Conductor load and tower body wind load are converted into the xial feed of the compound cross-arm tower member of upper font simultaneously, load is transferred to
Tower body.Cross-arm and tower body wherein pressure are transferred to tower body by two composite support insulators；And pulling force is combined by two
Material oblique pull insulator is delivered to tower body.
(4) lightning protection of the compound cross-arm tower of font and ground connection on
The ground connection of the compound cross-arm tower of upper font realized by outside steel structure member, by steel construction earth wire support 3 with
Ground wire connects, and steel construction earth wire support 3 is connected with tower body 4, reaches the purpose of ground connection lightning protection.
(5) insulation configuration of the compound cross-arm tower of font on
Upper font compound cross-arm tower is reached by ensureing that conducting wire hanging point is satisfied by insulation distance to the distance of any metalwork
To the purpose of tower head insulation.Insulation distance is mainly carries out insulation configuration by different voltages, height above sea level and gradation for surface pollution
And determine.In the scope of the air gap circle influenceed simultaneously for switching overvoltage and the air gap, using composite structure
Part, realizes the purpose of insulation, as shown in Figure 3.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
Specific embodiment of the invention is only limitted to this, for general technical staff of the technical field of the invention, is not taking off
On the premise of present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention by institute
Claims of submission determine scope of patent protection.
Claims (8)
1. a kind of upper font E glass-epoxies cross-arm tower, it is characterised in that including the tower leg (6), the tower body that are sequentially connected with
And tower head (4)；
Also include being arranged at three groups of composite horizontal strokes being made up of oblique pull insulator (2) and support insulator (1) of shaft tower side
Load, three groups of cross-arms are distributed in tower body (4) both sides into upper font, and three groups of cross-arms are arranged along tower body axis by upper font；Every group is combined
Cross-arm includes two oblique pull insulators (2) and two support insulators (1) and connection steel hanging point device (10)；The oblique pull
One end of insulator (2) is connected with the tower body (4), and the other end is connected with the one end of the support insulator (1), the pillar
The other end of insulator (1) is connected with the tower body (4), and its tie point is located at the oblique pull insulator (2) and the tower body (4)
The lower section of tie point；One end that the support insulator (1) is connected with the oblique pull insulator (2) is provided with connection steel hanging point dress
Put (10)；The support insulator (1) and the tie point of the oblique pull insulator (2) be not less than the support insulator (1) with
The tie point of the tower body (4).
2. upper font E glass-epoxies cross-arm tower according to claim 1, it is characterised in that the oblique pull is exhausted
Edge (2) is flexible piece, two ends by U-shaped ring connector respectively with steel hanging point device (10) and tower body (4) bolt connection.
3. font E glass-epoxy cross-arm towers are gone up as claimed in claim 1, it is characterised in that the post insulator
Sub (1) is rigid member, and support insulator (1) includes composite element, the steel sleeve at composite element two ends and cross
Plate connector (13)；Two composite end steel sleeves with steel hanging point device (10) bolt connection, two composites
Root steel sleeve and cross plate connector (13) be bolted with tower body (4)；Its one end is used with the tower body (4)
Steel plate is connected.
4. the upper font E glass-epoxies cross-arm tower as described in any one of claim 2 to 3, it is characterised in that described
Oblique pull insulator (2) is located at tower body (4) middle part or tower body (4) lateral surface with the tie point of the tower body (4).
5. the upper font E glass-epoxies cross-arm tower as described in any one of claim 2 to 3, it is characterised in that described
Support insulator (1) is located at tower body (4) middle part or tower body (4) lateral surface with the tie point of the tower body (4).
6. the upper font E glass-epoxies cross-arm tower as described in any one of claim 2 to 3, it is characterised in that described
Oblique pull insulator (2) or the support insulator (1) are front and rear two, and steel hanging point device (10) is exhausted with two described oblique pulls
It is approximate V-shaped after being connected between edge (2) or two described support insulators (1).
7. upper font E glass-epoxies cross-arm tower according to claim 1, it is characterised in that described oblique pull
Full skirt is carried on insulator (2) and support insulator (1)；Oblique pull insulator (2) and support insulator (1) upper end are equipped with
Grading ring.
8. upper font E glass-epoxies cross-arm tower according to claim 1, it is characterised in that compound cross-arm exists
Composite element, the material of the composite element are used by the component in electric clearance and insulation distance coverage
It is fiberglass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710184100.8A CN106836935A (en) | 2017-03-24 | 2017-03-24 | A kind of upper font E glass-epoxies cross-arm tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710184100.8A CN106836935A (en) | 2017-03-24 | 2017-03-24 | A kind of upper font E glass-epoxies cross-arm tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106836935A true CN106836935A (en) | 2017-06-13 |
Family
ID=59130576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710184100.8A Pending CN106836935A (en) | 2017-03-24 | 2017-03-24 | A kind of upper font E glass-epoxies cross-arm tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106836935A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419952A (en) * | 2017-09-06 | 2017-12-01 | 武汉南瑞电力工程技术装备有限公司 | A kind of extra-high voltage composite insulation cross arm |
| CN110094100A (en) * | 2019-04-28 | 2019-08-06 | 江苏神马电力股份有限公司 | A kind of wineglass tower |
| CN112431466A (en) * | 2020-11-27 | 2021-03-02 | 国网陕西省电力公司建设分公司 | Double-loop composite tower head tower |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB693423A (en) * | 1948-09-13 | 1953-07-01 | Archibald Milne Hamilton | Improvements relating to bridges and bridge-like structures and structural elements |
| CN101942922A (en) * | 2010-08-16 | 2011-01-12 | 中国电力科学研究院 | Process for preparing power transmission composite cross arm with electric mark corrosion tolerance and high hydrophobic property |
| CN202197048U (en) * | 2011-07-05 | 2012-04-18 | 河南省电力公司洛阳供电公司 | Double angle steel hanging point lifting and connecting tool for tower use |
| CN102966257A (en) * | 2012-11-16 | 2013-03-13 | 中国电力工程顾问集团西北电力设计院 | 750kV composite material cross arm |
| CN202996444U (en) * | 2012-12-19 | 2013-06-12 | 陕西省电力公司规划评审中心 | 750 kV power transmission line composite cross-arm structure configured with grading ring and shielding ring |
| CN206636296U (en) * | 2017-03-24 | 2017-11-14 | 国家电网公司 | A kind of upper font E glass-epoxies cross-arm tower |
-
2017
- 2017-03-24 CN CN201710184100.8A patent/CN106836935A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB693423A (en) * | 1948-09-13 | 1953-07-01 | Archibald Milne Hamilton | Improvements relating to bridges and bridge-like structures and structural elements |
| CN101942922A (en) * | 2010-08-16 | 2011-01-12 | 中国电力科学研究院 | Process for preparing power transmission composite cross arm with electric mark corrosion tolerance and high hydrophobic property |
| CN202197048U (en) * | 2011-07-05 | 2012-04-18 | 河南省电力公司洛阳供电公司 | Double angle steel hanging point lifting and connecting tool for tower use |
| CN102966257A (en) * | 2012-11-16 | 2013-03-13 | 中国电力工程顾问集团西北电力设计院 | 750kV composite material cross arm |
| CN202996444U (en) * | 2012-12-19 | 2013-06-12 | 陕西省电力公司规划评审中心 | 750 kV power transmission line composite cross-arm structure configured with grading ring and shielding ring |
| CN206636296U (en) * | 2017-03-24 | 2017-11-14 | 国家电网公司 | A kind of upper font E glass-epoxies cross-arm tower |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419952A (en) * | 2017-09-06 | 2017-12-01 | 武汉南瑞电力工程技术装备有限公司 | A kind of extra-high voltage composite insulation cross arm |
| CN110094100A (en) * | 2019-04-28 | 2019-08-06 | 江苏神马电力股份有限公司 | A kind of wineglass tower |
| CN112431466A (en) * | 2020-11-27 | 2021-03-02 | 国网陕西省电力公司建设分公司 | Double-loop composite tower head tower |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170613 |
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| RJ01 | Rejection of invention patent application after publication |