CN111894340A - Double-loop iron tower for ice-covered area power transmission line - Google Patents
Double-loop iron tower for ice-covered area power transmission line Download PDFInfo
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- CN111894340A CN111894340A CN202010924962.1A CN202010924962A CN111894340A CN 111894340 A CN111894340 A CN 111894340A CN 202010924962 A CN202010924962 A CN 202010924962A CN 111894340 A CN111894340 A CN 111894340A
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- truss
- cross arm
- power transmission
- ice
- double
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- 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
- E04H12/08—Structures made of specified materials of metal
- E04H12/10—Truss-like structures
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- 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
Abstract
The invention discloses a double-loop iron tower for an ice-covered area power transmission line, which comprises a tower body and a cross arm, wherein the cross arm comprises four cross supports which are fixedly arranged on the upper section of the tower body from top to bottom in sequence, each cross support is of a truss structure and comprises a truss beam and a reinforcing rod which form an airflow loop, the truss beams are sequentially connected end to form an isosceles trapezoid, and the reinforcing rods are fixedly arranged between the bottom edge and the waist of the isosceles trapezoid; the truss girder is a hollow pipe, a fan for forming air circulation and an electric heating wire for heating air are arranged in the truss girder, and an insulating outer layer is arranged on the surface of the truss girder. The invention can effectively remove ice on the cross arm in time when operating in an extremely cold ice-covered area, lightens the mechanical load of the cross arm, improves the capability of preventing ice flashover and lightning stroke of the iron tower, and ensures the safe, stable and energy-saving operation of a power transmission system.
Description
Technical Field
The invention relates to a basic electric power facility, in particular to a double-loop iron tower for an ice-covered area power transmission line.
Background
With the rapid development of electric power utilities in China, the land of a power transmission line corridor is more and more tense due to the vigorous construction of the power transmission line, the floor area of the power transmission line corridor can be greatly reduced by adopting the same-tower double-circuit or multi-circuit power transmission, and the construction of the same-tower double-circuit or multi-circuit power transmission line in China has a remarkable rising trend in recent years.
The existing double-loop iron tower structure is mainly made of various section steels, an insulator string used for hanging a lead is arranged on the tower, as an overhead line is exposed in the field for a long time, the threat of natural adverse factors such as dirt, thunder, ice and snow is inevitable in operation, when the insulator surface of the insulator string is polluted, the dirt dust on the insulating surface is wetted under meteorological conditions such as fog, dew, rain, snow and the like, and as the action of external voltage, the lead is grounded through the insulator surface, a cross arm and an iron lap to cause an electric leakage accident, and even can cause the insulator to generate a dirt flash phenomenon to cause line tripping or cause system collapse to cause huge loss when the lead is serious; in addition, when the top of the iron tower or the line is covered by ice and snow, the cross arm is easy to carry too much load, so that the performance of the motor is reduced, and the cross arm is easy to be damaged due to too much mechanical load, so that the normal operation of the double-loop iron tower is influenced.
In order to overcome the defects, the double-loop iron tower needs to be improved so as to obviously improve the lightning protection and ice flashover prevention capability of the double-loop iron tower in an ice coating area, improve the ice resistance and the mechanical strength, reduce the weight of a tower body and ensure the safe, stable and energy-saving operation of a power transmission system.
Disclosure of Invention
In view of the above, the invention provides a double-loop iron tower for power transmission lines in an ice-covered area, which can effectively improve the capability of preventing ice flashover and lightning stroke and ensure the safe, stable and energy-saving operation of a power transmission system.
The invention discloses a double-loop iron tower for an ice-covered area power transmission line, which comprises a tower body and a cross arm, wherein the cross arm comprises four cross supports which are sequentially and fixedly arranged on the upper section of the tower body from top to bottom, each cross support is of a truss structure and comprises a truss beam and a reinforcing rod which form an airflow loop, the truss beams are sequentially connected end to form an isosceles trapezoid, and the reinforcing rods are fixedly arranged between the bottom edge and the waist of the isosceles trapezoid; the truss girder is a hollow pipe, a fan forming airflow circulation and a heating wire heating gas are arranged in the truss girder, an insulating outer layer is arranged on the surface of the truss girder, the fan is arranged in each truss girder, gas flowing circulation is formed in each truss girder, the flowing gas can be heated to be heated air circulation under the heating action of the heating wire, when the double-loop iron tower works in a high and cold ice-covered area, ice covering on the cross arm body can be quickly melted by means of the heated air circulation formed in the truss girder, timely deicing is carried out on the cross arm body, the phenomenon that the ice covering on the cross arm body increases the mechanical load and the wetting risk of the cross arm body is avoided, and the safety and stability of the double-loop iron tower are improved.
Furthermore, the lower bottoms of the truss girders of the cross arm bodies positioned at the top of the tower body are positioned above the upper bottom, the lower bottoms of the truss girders of the other cross arm bodies are positioned below the upper bottom, the inverted truss girders are adopted for the cross arm bodies at the top, so that an insulator string can be hung conveniently, meanwhile, the waist of the isosceles trapezoid forms an inclined strut to achieve a perfect stress configuration, and the other cross arm bodies positioned below better support the reaction force from the cross arm bodies at the top of the tower body.
Furthermore, the truss girder is formed by connecting round pipes or square pipes in sequence, and the hollow pipe fitting not only reduces the weight of the whole double-loop iron tower, but also provides a passage for the circulation of hot air flow.
Furthermore, the insulating outer layer is made of silica gel, rubber or plastics, and the surface layer of the cross arm is covered with a layer of insulating material, so that the capability of the iron tower for preventing pollution flashover and lightning stroke can be effectively improved, and the safe, stable and energy-saving operation of a power transmission system is guaranteed.
The invention has the beneficial effects that: the invention discloses a double-loop iron tower for an ice-covered area power transmission line, which comprises a tower body and a cross arm, wherein the cross arm comprises four cross supports which are sequentially and fixedly arranged on the upper section of the tower body from top to bottom, each cross support is of a truss structure and comprises a truss beam and a reinforcing rod which form an airflow loop, the truss beams are sequentially connected end to form an isosceles trapezoid, and the reinforcing rods are fixedly arranged between the bottom edge and the waist of the isosceles trapezoid; the truss girders are hollow pipes, fans forming airflow circulation and heating wires for heating gas are arranged in the truss girders, insulating outer layers are arranged on the surfaces of the truss girders, each truss girder is internally provided with a fan, gas flowing circulation is formed in each truss girder, and the flowing gas can be heated into hot air circulation under the heating action of the heating wires, when the double-loop iron tower works in a high and cold icing area, ice covering the cross arm body can be quickly melted by the hot air circulation formed in the truss girders, the cross arm body is timely deiced, the phenomenon that the ice covering on the cross arm body increases the mechanical load and the wetting risk of the cross arm body is avoided, the safety and stability of the double-loop iron tower are improved, the surface layer of the cross arm body is covered with a layer of insulating material, the surface insulating strength between a lead and the ground is increased by 100-180%, the pollution flashover resistance and the lightning protection level of a power transmission line are obviously improved, the method can effectively improve the capability of the iron tower for preventing pollution flashover and lightning stroke, and ensures the safe, stable and energy-saving operation of a power transmission system.
Drawings
The invention is further described below with reference to the figures and examples.
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of the internal structure of the cross arm body.
Detailed Description
Fig. 1 is a schematic structural view of the present invention, fig. 2 is a schematic structural view of the inside of the cross arm body shown in fig. 2: the tower comprises a tower body 1 and a cross arm, wherein the cross arm comprises four cross supports 2 which are sequentially and fixedly arranged on the upper section of the tower body 1 from top to bottom, each cross support 2 is of a truss structure and comprises a truss girder 3 and a reinforcing rod 4 which form an airflow loop, the truss girders 3 are sequentially connected end to form an isosceles trapezoid, and the reinforcing rods 4 are fixedly arranged between the bottom edge and the waist of the isosceles trapezoid; the truss girder 3 is a hollow pipe, a fan 5 for forming air circulation and a heating wire 6 for heating air are arranged in the truss girder 3, an insulating outer layer is arranged on the surface of the truss girder 3, the fan 5 is arranged in each truss girder 3, air flowing circulation is formed in each truss girder 3, the flowing air can be heated to be hot air circulation under the heating action of the heating wire 6, when the double-loop iron tower works in an alpine ice-covered area, ice covering on the cross arm body 2 can be quickly melted by the hot air circulation formed in the truss girder 3, timely deicing is carried out on the cross arm body 2, the phenomenon that the mechanical load and the wetting risk of the cross arm body 2 are increased due to the ice covering on the cross arm body 2 is avoided, and the safety and stability of the double-loop iron tower are improved.
In this embodiment, the lower bottoms of the truss girders 3 of the cross arm bodies 2 positioned at the top of the tower body 1 are positioned above the upper bottom, the lower bottoms of the truss girders 3 of the other cross arm bodies 2 are positioned below the upper bottom, the inverted truss girders 3 are adopted for the top cross arm bodies 2, so that the insulator strings can be hung conveniently, the waist of the isosceles trapezoid forms an inclined support to achieve a perfect stress configuration, and the other cross arm bodies 2 positioned below better support the reaction force from the top cross arm bodies 2 of the tower body 1.
In this embodiment, the truss girder 3 is formed by connecting round pipes or square pipes in sequence, and the hollow pipe fitting not only reduces the weight of the whole double-circuit iron tower, but also provides a passage for the circulation of hot air flow.
In the embodiment, the insulating outer layer is made of silica gel, rubber or plastics, and the surface layer of the cross arm body 2 is covered with a layer of insulating material, so that the capability of the iron tower for preventing pollution flashover and lightning stroke can be effectively improved, and the safe, stable and energy-saving operation of a power transmission system is guaranteed.
The fan is arranged in each truss girder, gas flowing circulation is formed in each truss girder, flowing gas can be heated to be hot air circulation under the heating action of the heating wires, when the double-loop iron tower works in an alpine ice-covered area, ice covered on the cross support body can be quickly melted by the hot air circulation formed in the truss girders, the cross support body is timely deiced, the phenomenon that the mechanical load and the wetting risk of the cross support body are increased due to ice covering on the cross support body is avoided, the safety and the stability of the double-loop iron tower are improved, the surface insulating strength between a conducting wire and the iron tower grounding is increased by 100% -180% due to the fact that the surface layer of the cross support body is covered with a layer of insulating material, the pollution flashover prevention and lightning stroke prevention level of a power transmission line is remarkably improved, the pollution flashover prevention and lightning stroke prevention capacity can be effectively improved, and the safe, stable and energy-saving operation of a.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (4)
1. The utility model provides a two return circuit iron towers for covering ice district transmission line, includes body of the tower and cross arm, its characterized in that: the cross arm comprises four cross arm bodies which are sequentially and fixedly arranged on the upper section of the tower body from top to bottom, each cross arm body is of a truss structure and comprises a truss beam and a reinforcing rod, the truss beams form an airflow loop, the truss beams are sequentially connected end to form an isosceles trapezoid, and the reinforcing rods are fixedly arranged between the bottom edge and the waist of the isosceles trapezoid; the truss girder is a hollow pipe, a fan for forming air circulation and an electric heating wire for heating air are arranged in the truss girder, and an insulating outer layer is arranged on the surface of the truss girder.
2. The double-circuit iron tower for the power transmission line in the icing area according to claim 1, characterized in that: the lower bottoms of the truss girders of the cross arm bodies positioned at the top of the tower body are positioned above the upper bottom, and the lower bottoms of the truss girders of the other cross arm bodies are positioned below the upper bottom.
3. The double-circuit iron tower for the power transmission line in the icing area according to claim 2, characterized in that: the truss girder is formed by connecting round pipes or square pipes in sequence.
4. The double-circuit iron tower for the power transmission line in the icing area according to claim 2, characterized in that: the insulating outer layer is made of silica gel, rubber or plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010924962.1A CN111894340A (en) | 2020-09-05 | 2020-09-05 | Double-loop iron tower for ice-covered area power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010924962.1A CN111894340A (en) | 2020-09-05 | 2020-09-05 | Double-loop iron tower for ice-covered area power transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111894340A true CN111894340A (en) | 2020-11-06 |
Family
ID=73225435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010924962.1A Pending CN111894340A (en) | 2020-09-05 | 2020-09-05 | Double-loop iron tower for ice-covered area power transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111894340A (en) |
-
2020
- 2020-09-05 CN CN202010924962.1A patent/CN111894340A/en active Pending
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| PB01 | Publication | ||
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Address after: 400707 No.95, Jiade Avenue, caijiagang Town, Beibei District, Chongqing Applicant after: Chongqing Guangren Iron Tower Manufacture Co.,Ltd. Address before: 400707 No.95, Jiade Avenue, caijiagang Town, Beibei District, Chongqing Applicant before: CHONGQING GUANGREN TOWER MANUFACTURING Co.,Ltd. |