CN111502385A - 35kV single-circuit compact high-strength electric pole - Google Patents

35kV single-circuit compact high-strength electric pole Download PDF

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Publication number
CN111502385A
CN111502385A CN202010352668.8A CN202010352668A CN111502385A CN 111502385 A CN111502385 A CN 111502385A CN 202010352668 A CN202010352668 A CN 202010352668A CN 111502385 A CN111502385 A CN 111502385A
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China
Prior art keywords
electric pole
lead
pole
degrees
shaped
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CN202010352668.8A
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Chinese (zh)
Inventor
李小生
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Yichun Honghui New Machinery And Electricity Co ltd
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Yichun Honghui New Machinery And Electricity Co ltd
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Priority to CN202010352668.8A priority Critical patent/CN111502385A/en
Publication of CN111502385A publication Critical patent/CN111502385A/en
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/02Structures made of specified materials
    • E04H12/12Structures made of specified materials of concrete or other stone-like material, with or without internal or external reinforcements, e.g. with metal coverings, with permanent form elements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/24Cross 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)
  • Wind Motors (AREA)

Abstract

The invention discloses a 35kV single-loop compact high-strength electric pole which comprises a three-section pin pulling rod, a groove-shaped lead cross arm, a V-shaped lead insulator string and a ground lead support, wherein the three-section pin pulling rod comprises a bottom electric pole, a middle electric pole and a top electric pole, the groove-shaped lead cross arm, the V-shaped lead insulator string and the ground lead support are arranged in sequence, the protection angle of a ground lead to a lead is α, the angle range of α is 11 degrees to α degrees and is less than or equal to 18 degrees, the swing angle of a lead hanging position of the lead is zero, the accident rate of discharging of the lead to a pole tower and short circuit of the lead in a gear caused by strong wind can be greatly reduced, the occupied corridor resources required by a circuit are less, the protection angle of the ground lead to the lead is α, the angle range of α is 11 degrees to α degrees and is less than or equal to 18 degrees, the lightning trip.

Description

35kV single-circuit compact high-strength electric pole
Technical Field
The invention belongs to the field of power transmission and distribution lines, and particularly relates to a 35kV single-loop compact high-strength electric pole.
Background
The wire V-shaped suspension string technology has been applied to angle steel and steel tube towers of high-voltage grade transmission lines, but has not been found on reinforced concrete poles; the lightning protection method aims at the problems that lightning accidents of the existing 35kV power grid frequently occur in China in recent years, the safe and stable operation of the power grid is seriously threatened, the existing lightning protection measures of the 35kV power transmission line play a certain role but are still not enough, especially the existing 35kV single-loop compact high-strength pole is also subjected to discharging on a pole tower and short circuit of a lead in a pole due to strong wind, the corridor resources required by cables occupy more, the protection angle of the 35kV single-ground lead cannot be effectively reduced, and the lightning protection measures are also poor. Therefore, effective solutions to solve the above problems need to be proposed.
Disclosure of Invention
The invention aims to provide a 35kV single-loop compact high-strength electric pole. The lightning protection method solves the problems that in the prior art, lightning accidents of the current 35kV power grid frequently occur in China in recent years, the safe and stable operation of the power grid is seriously threatened, the existing lightning protection measures of the 35kV power transmission line play a certain role but are still not enough, especially the problems that the discharging of a pole tower and the short circuit of a lead in a gear are caused due to the fact that the lead is in strong wind, the corridor resources required by cables occupy more, the protection angle of the 35kV single-ground lead cannot be effectively reduced, and the lightning protection measures are poor are solved.
The technical scheme provided by the invention is as follows: a35 kV single-loop compact high-strength electric pole is provided with: the three-section type pin pulling rod is a reinforced concrete pole and comprises a bottom pole, a middle pole and a top pole which are sequentially connected with one another; the bottom electric pole, the middle electric pole and the top electric pole are connected through steel plate rings in a welding mode;
the number of the groove-shaped wire cross arms is three, and the fixed ends of the groove-shaped wire cross arms are fixedly connected with the top electric pole through anchor ears; the two trough-shaped wire cross arms are symmetrically distributed, the distance between the central axis of each trough-shaped wire cross arm and the top end face of the top electric pole is 6000mm, and the distance between the central axis of the other trough-shaped wire cross arm and the top end face of the top electric pole is 3000 mm; the anchor ears are all provided with through nails for fixation;
the bottom of the V-shaped lead insulator string is arranged at an included angle of 120 degrees, one end of the V-shaped lead insulator string is connected with the fixed end of the groove-shaped lead cross arm through the through nail, and the other end of the V-shaped lead insulator string is fixedly connected with the free end of the groove-shaped lead cross arm to form a stable triangular structure;
the distance between the central axis of the ground wire support and the top end face of the top electric pole is 200mm, ground wire hanging points are arranged on the same side of the ground wire support and the cross arm of the other groove-shaped lead, the protection angle of the ground wire to the lead is α, and the angle range of α is 11 degrees & lt α and is not more than 18 degrees.
Further, the diameter of the three-piece tapered rod gradually increases from the top downward, and the taper of the three-piece tapered rod is 1/75.
Furthermore, the three-section type tapered rod is made of prestressed threaded steel bars, high-strength prestressed steel bars and concrete, and the strength grade of the concrete is C80.
Further, the bottom of bottom pole is equipped with the flange, and will through rag bolt bottom pole and basis fixed connection.
Further, the steel plate ring is made of Q345.
Has the advantages that:
the invention relates to a 35kV single-loop compact high-voltage pole, which is a V-shaped lead insulator string arranged at an included angle of 120 degrees, wherein one end of the V-shaped lead insulator string is connected with the fixed end of a groove-shaped lead cross arm through a through nail, the other end of the V-shaped lead insulator string is fixedly connected with the free end of the groove-shaped lead cross arm so as to form a stable triangular structure, the swing angle of a lead hanging position of the V-shaped lead insulator string is zero, the accident rates of pole tower discharge, lead short circuit and the like of a line lead in a gear and caused by strong wind of the line lead can be greatly reduced, less corridor resources are occupied for the line, the protection angle of the ground to the lead is α, the angle range of α is 11 degrees and α degrees or less than 18 degrees, the protection angle of a 35kV single ground wire to the lead can be effectively reduced, the line tripping accident rate can be greatly reduced, the accident rate of a power grid caused by lightning stroke is reduced, the accident rate of the line is reduced, the lightning stroke accident rate of the line is reduced, and the.
Drawings
Fig. 1 is a schematic view of a 35kV single-loop compact high-strength electric pole in a main view structure;
FIG. 2 is an enlarged schematic view of the invention at A;
fig. 3 is a schematic view of a main view local structure of a 35kV single-loop compact high-strength electric pole of the invention.
In the figure: 1-three-section pin-out rod, 11-bottom electric pole, 12-middle electric pole, 13-top electric pole, 2-steel plate ring, 3-groove-shaped lead cross arm, 4-hoop, 5-through nail, 6-V-shaped lead insulator string, 7-ground wire support, 8-ground wire hanging point and 9-flange.
Detailed Description
Embodiments of the present invention are further described below with reference to the accompanying drawings.
As shown in figures 1-3, the 35kV single-loop compact high-strength electric pole in the embodiment comprises a three-section type pin pulling rod 1, the three-section type pin pulling rod 1 is a reinforced concrete electric pole, the three-section type pin pulling rod 1 comprises a bottom electric pole 11, a middle electric pole 12 and a top electric pole 13 which are sequentially connected with one another, the bottom electric pole 11, the middle electric pole 12 and the top electric pole 13 are connected through a steel plate ring 2 in a welded mode, three groove-shaped lead cross arms 3 are arranged, fixed ends of the groove-shaped lead cross arms 3 are fixedly connected with the top electric pole 13 through anchor ears 4, two groove-shaped lead cross arms 3 are symmetrically distributed, the distance between the central axis of each groove-shaped lead cross arm 3 and the top end face of the top electric pole 13 is 6000mm, the distance between the central axis of the other groove-shaped lead cross arm 3 and the top end face of the top electric pole 13 is 3000mm, the anchor ears 4 are fixed by the anchor nails 5, V-shaped lead insulation supports arranged at the bottoms of 120 degrees are connected with the groove-shaped lead cross arms 3 through anchor ears 5, the anchor ears 6, the anchor ears are connected with the ground wire supports at angles between the top ends of the anchor ears 3 and the earth wire supports, the anchor ears are connected with the earth wire supports, the earth wires at angles of the earth wires at the.
The 35kV single-loop compact high-strength electric pole comprises the following embodiments that the electric pole is 230mm in diameter, 50mm in wall thickness and 1/75 in taper, 3100mm in width of a line corridor, the electric pole structure meets the current regulation specification through calculation, requirements in aspects of lightning protection, insulation fit, electromagnetic environment and the like are met, a small occupied area is achieved without wire drawing, the number of the groove-shaped wire cross arms 3 is three, the fixed end of each groove-shaped wire cross arm 3 is fixedly connected with the top electric pole 13 through a hoop 4, the other two groove-shaped wire cross arms 3 are symmetrically distributed, the distance between the central axis of each groove-shaped wire cross arm 3 and the top end face of the top electric pole 13 is 6000mm, the distance between the central axis of the other groove-shaped wire cross arm 3 and the top end face of the top electric pole 13 is 3000mm, the hoops 4 are respectively provided with a through-pin 5 for fixation, the V-shaped wire insulation string 6 arranged at an included angle of 120 degrees at the bottom is arranged, one end of the V-shaped wire insulation string 6 is connected with the groove-shaped wire cross arm fixed end 3 through the pin 5, the wire insulation support is larger than the wire cross arm 3, the wire support is used for forming a stable connection angle, the three-shaped wire suspension bracket, the three-wire suspension angle, the three-wire suspension bracket is used for reducing the live wire suspension wire, the live wire suspension.
In summary, one end of the V-shaped lead insulator string 6 arranged with an included angle of 120 degrees at the bottom is connected with the fixed end of the groove-shaped lead cross arm 3 through the through nail 5, the other end of the V-shaped lead insulator string 6 is fixedly connected with the free end of the groove-shaped lead cross arm 3 to form a stable triangular structure, the swing angle of the lead hanging position is zero, the accident rate of pole tower discharge, lead short circuit in the gear and the like of a line lead caused by strong wind can be greatly reduced, the occupied corridor resources required by the line are less, the protection angle of the ground to the lead is α, the angle range of α is 11 degrees to α degrees or less than 18 degrees, the protection angle of a 35kV single ground wire to the lead can be effectively reduced, the lightning stroke accident rate of the line can be greatly reduced, the lightning stroke accident rate of a power grid caused by lightning stroke is reduced, the lightning stroke accident rate of the line is reduced, the reasonable size arrangement of the V-shaped lead insulator string 6 has the characteristics of small occupied space, narrow corridor, simple structure, economy and durability, and the like, and is particularly suitable for severe wind damage, ice damage areas.
In this embodiment, the diameter of the three-piece tapered rod 1 gradually increases from the top downward, and the taper of the three-piece tapered rod 1 is 1/75. The diameter of the three-section type pin pulling rod 1 is gradually increased from the top to the bottom, so that the strength requirement can be met, the material is saved, the cost is reduced, the gravity center of the three-section type pin pulling rod 1 is reduced, and the stability is greatly improved. It is also added that, in general, pole tips are used for poles of small height, because the weight of the electric wires and the forces generated by wind loads are much smaller than for poles with higher height, the horizontal forces acting on the pole and the resulting bending moments are progressively greater from the top of the pole down, so that the strength of the top of the pole does not need to be the same as that of the root. In addition, the floor area of the device is basically equal to that of a steel pipe pole, the land acquisition difficulty of engineering construction is small, the cost for felling trees and removing houses in the range of a line corridor is low, and the construction is convenient.
In this embodiment, the three-segment tapered rod 1 is made of prestressed twisted steel, high-strength prestressed steel and concrete, wherein the strength grade of the concrete is C80. Compared with the common electric pole, the two have basically the same appearance. However, the concrete pole with the three-section type pin drawing rod 1 structure is mainly made of prestressed threaded steel bars, high-strength prestressed steel bars and concrete, and the steel bars are respectively made of HRBF500 prestressed threaded steel bars and high-strength prestressed steel bars (stress-relief steel bars), so that the tension performance of the steel bars is guaranteed, the pressure resistance of the concrete is further improved, the working performance of the three-section type pin drawing rod 1 is guaranteed, and various defects possibly occurring in the independent use process are avoided. Meanwhile, the coating has the advantages of corrosion resistance, remarkable economic and social benefits and the like, and has good application prospect in crowded areas of distribution network line corridors and coastal areas with strong corrosion.
Because the three-section type top pulling rod 1 is made of concrete, the compactness is high, the corrosion resistance is high, and the three-section type top pulling rod has good bearing capacity, is convenient to install, has relatively low investment cost, is approved in the design at present, and is actually applied to erecting a 35kV power line to produce a good effect.
In this embodiment, the bottom of bottom pole 11 is equipped with flange 9 to through rag bolt with bottom pole 11 and basic fixed connection. It should be noted that the production process of the three-section type tapered rod 1 is basically the same as that of a common partially prestressed electric pole, the three-section type tapered rod 1 is processed in sections, can be welded on site and integrally hoisted on site, and is connected with a foundation through foundation bolts, and the foundation can adopt a step type rigid or cast-in-place pile foundation, so that the connection strength of the three-section type tapered rod 1 and the foundation is ensured. The flange 9 increases the contact area between the bottom end of the bottom electric pole 11 and the foundation, so that the embedded electric pole has higher stability and enhances the lodging resistance.
In this embodiment, the steel plate ring 2 is made of Q345. Ensure the joint strength of sectional type junction, can effectively improve the corrosion resistance of Q345 steel in coastal, saline and alkaline environment to prolong its life, also can further alleviate pole weight.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (5)

1. The utility model provides a 35kV single loop compact pole that excels in which has:
the three-section type pin withdrawal rod (1), wherein the three-section type pin withdrawal rod (1) is a reinforced concrete pole, and the three-section type pin withdrawal rod (1) comprises a bottom pole (11), a middle pole (12) and a top pole (13) which are sequentially connected with one another; the bottom electric pole (11), the middle electric pole (12) and the top electric pole (13) are connected through a steel plate ring (2) in a welding mode;
the number of the groove-shaped wire cross arms (3) is three, and the fixed ends of the groove-shaped wire cross arms (3) are fixedly connected with the top electric pole (13) through anchor ears (4); the two trough-shaped wire cross arms (3) are symmetrically distributed, the distance between the central axis of each trough-shaped wire cross arm and the top end face of the top electric pole (13) is 6000mm, and the distance between the central axis of the other trough-shaped wire cross arm (3) and the top end face of the top electric pole (13) is 3000 mm; the anchor ears (4) are fixed by through nails (5);
the bottom of the V-shaped lead insulator string (6) is arranged at an included angle of 120 degrees, one end of the V-shaped lead insulator string (6) is connected with the fixed end of the groove-shaped lead cross arm (3) through the through nail (5), and the other end of the V-shaped lead insulator string (6) is fixedly connected with the free end of the groove-shaped lead cross arm (3) to form a stable triangular structure;
the distance between the central axis of the ground wire support (7) and the top end face of the top electric pole (13) is 200mm, a ground wire hanging point (8) is arranged on the same side of the ground wire support (7) and the other groove-shaped lead cross arm (3), wherein the protection angle of the ground wire to the lead is α, and the angle range of α is 11 degrees, α degrees and 18 degrees.
2. The 35kV single-circuit compact high-strength electric pole as claimed in claim 1, wherein the diameter of the three-segment tapered rod (1) is gradually increased from the top to the bottom, and the taper of the three-segment tapered rod (1) is 1/75.
3. The 35kV single-circuit compact high-strength electric pole as claimed in claim 1 or 2, wherein the three-segment tapered rod (1) is made of prestressed thread steel bars, high-strength prestressed steel bars and concrete, and the strength grade of the concrete is C80.
4. The 35kV single-loop compact high-strength electric pole as claimed in claim 1, wherein a flange (9) is arranged at the bottom of the bottom electric pole (11), and the bottom electric pole (11) is fixedly connected with a foundation through anchor bolts.
5. The 35kV single-circuit compact high-strength electric pole as claimed in claim 1, wherein the steel plate ring (2) is made of Q345.
CN202010352668.8A 2020-04-28 2020-04-28 35kV single-circuit compact high-strength electric pole Pending CN111502385A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010352668.8A CN111502385A (en) 2020-04-28 2020-04-28 35kV single-circuit compact high-strength electric pole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010352668.8A CN111502385A (en) 2020-04-28 2020-04-28 35kV single-circuit compact high-strength electric pole

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CN111502385A true CN111502385A (en) 2020-08-07

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202249083U (en) * 2011-09-16 2012-05-30 上海众益电器材料有限公司 Reinforced taper concrete pole
CN202745459U (en) * 2012-09-13 2013-02-20 江西华电电力设备有限公司 C80 high-intensity concrete large-top-diameter partially prestressed electric pole
CN103362343A (en) * 2013-07-04 2013-10-23 国家电网公司 Same-tower six-loop tower
CN104269232A (en) * 2014-09-22 2015-01-07 国家电网公司 Composite insulator V-shaped overhung string for overhead transmission line
CN205012746U (en) * 2015-04-17 2016-02-03 国家电网公司 Last style of calligraphy of 35kV cluster tangent tower
CN206016404U (en) * 2016-08-26 2017-03-15 中国能源建设集团安徽省电力设计院有限公司 A kind of steel ring component that reinforces for two concrete tapered pole junctions
CN207073321U (en) * 2017-07-31 2018-03-06 河北安达电气科技有限公司 A kind of electric force pole tower cross-arm
CN108240132A (en) * 2016-12-26 2018-07-03 黄冈昌耀电力器材有限公司 A kind of reinforced concrete pole flange component
CN110700676A (en) * 2019-09-30 2020-01-17 安徽省方大水泥制品有限公司 Sectional type prestressed high-strength reinforced concrete pole
CN110863691A (en) * 2019-09-12 2020-03-06 长沙晟丰电杆制造有限公司 Special high-strength prestressed concrete pole

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202249083U (en) * 2011-09-16 2012-05-30 上海众益电器材料有限公司 Reinforced taper concrete pole
CN202745459U (en) * 2012-09-13 2013-02-20 江西华电电力设备有限公司 C80 high-intensity concrete large-top-diameter partially prestressed electric pole
CN103362343A (en) * 2013-07-04 2013-10-23 国家电网公司 Same-tower six-loop tower
CN104269232A (en) * 2014-09-22 2015-01-07 国家电网公司 Composite insulator V-shaped overhung string for overhead transmission line
CN205012746U (en) * 2015-04-17 2016-02-03 国家电网公司 Last style of calligraphy of 35kV cluster tangent tower
CN206016404U (en) * 2016-08-26 2017-03-15 中国能源建设集团安徽省电力设计院有限公司 A kind of steel ring component that reinforces for two concrete tapered pole junctions
CN108240132A (en) * 2016-12-26 2018-07-03 黄冈昌耀电力器材有限公司 A kind of reinforced concrete pole flange component
CN207073321U (en) * 2017-07-31 2018-03-06 河北安达电气科技有限公司 A kind of electric force pole tower cross-arm
CN110863691A (en) * 2019-09-12 2020-03-06 长沙晟丰电杆制造有限公司 Special high-strength prestressed concrete pole
CN110700676A (en) * 2019-09-30 2020-01-17 安徽省方大水泥制品有限公司 Sectional type prestressed high-strength reinforced concrete pole

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Application publication date: 20200807

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