CN111622576A - High-strength metal electric power tower structure and erection method - Google Patents
High-strength metal electric power tower structure and erection method Download PDFInfo
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- CN111622576A CN111622576A CN202010405237.3A CN202010405237A CN111622576A CN 111622576 A CN111622576 A CN 111622576A CN 202010405237 A CN202010405237 A CN 202010405237A CN 111622576 A CN111622576 A CN 111622576A
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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
- E04H12/12—Structures 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
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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
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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
- E04H12/20—Side-supporting means therefor, e.g. using guy ropes or struts
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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
- E04H12/22—Sockets or holders for poles or posts
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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
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Abstract
The invention discloses a high-strength metal electric power tower structure which comprises two symmetrically arranged reinforced concrete electric poles, wherein the lower ends of the two reinforced concrete electric poles are respectively provided with an installation mechanism, a first iron cross beam is arranged between the two reinforced concrete electric poles, the upper ends of the two reinforced concrete electric poles are jointly and fixedly connected with a horizontally arranged second iron cross beam, two sides of the second iron cross beam are respectively provided with a rod-shaped suspension insulator, two sides of the two reinforced concrete electric poles are respectively provided with a composite cross arm structure, lightning conductors are respectively pulled on the two reinforced concrete electric poles, and the lower ends of the two lightning conductors are respectively provided with a connecting block. The invention enriches the pole type, reduces the line reconstruction cost, can effectively utilize a narrow corridor and reduce the height of the pole tower by using the composite cross arm and the composite insulator compared with the prior method of increasing the pole tower and the like to solve the problem of cross spanning, is simple and easy to implement in construction, and can save a large amount of manpower, material resources and financial resources.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a high-strength metal electric power tower structure and an erection method.
Background
A tower is a rod-shaped or tower-shaped structure that supports and maintains a distance between overhead transmission line conductors and overhead ground wires and to the ground. All countries in the world adopt steel construction, timber structure and reinforced concrete structure for line shaft tower. Rod-shaped structures of wood and reinforced concrete are commonly referred to as poles, and steel structures of turriform and reinforced concrete chimney-shaped structures are commonly referred to as towers. The tower without the stay wire is called a self-standing tower, and the tower with the stay wire is called a stay wire tower. China lacks wood resources, does not use wood poles, has prominent achievement in the aspects of reinforced concrete poles and reinforced concrete chimney-shaped crossing towers manufactured by applying the centrifugal principle, and the pole tower is one of basic devices in overhead distribution lines and can be divided into three types, namely wood poles, cement poles and metal poles according to the used materials. The cement pole has the advantages of long service life, small maintenance workload and the like, and is widely used. The most used concrete rods are tapered rods, the taper is generally 1/75, and the tapered rods are divided into common reinforced concrete rods and prestressed reinforced concrete rods;
the existing electric power tower structure is single in pole type, large in load on the upper portion of the tower and high in line transformation cost, and therefore a high-strength metal electric power tower structure and an erection method are provided for solving the problems.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, the pole type of an electric power pole tower structure is single, the upper load of the pole tower is large, and the line transformation cost is high, and provides a high-strength metal electric power pole tower structure and an erection method.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a high strength metal electric power tower structure, includes the reinforced concrete pole that two symmetries set up, two the lower extreme of reinforced concrete pole all is equipped with installation mechanism, and is equipped with first iron crossbeam, two between two reinforced concrete poles the common fixed connection in upper end of reinforced concrete pole has the second iron crossbeam that the level set up, the both sides of second iron crossbeam all are equipped with excellent type suspension insulator, two the both sides of reinforced concrete pole all are equipped with compound cross arm structure, two all pull on the reinforced concrete pole and establish the lightning conductor, and the lower extreme of two lightning conductors all is equipped with the connecting block.
Preferably, the mounting mechanism comprises a horizontally arranged mounting plate, and mounting screws are inserted into two sides of the mounting plate.
Preferably, the composite cross arm structure comprises a horizontally arranged sheath, a core rod is arranged in the sheath, hanging heads and a connecting base are respectively arranged at two ends of the sheath, an umbrella skirt is arranged on the side wall of the upper side of the sheath, and a composite insulator is obliquely arranged at the upper end of the sheath.
Preferably, the method for erecting the high-strength metal electric power tower structure comprises the following steps:
(1) selecting a tower rod structure: the structure of the overhead transmission line tower is designed based on different altitudes, the electric clearance of the tower is influenced by the altitudes, the steel consumption of the tower is seriously influenced, the straightness is realized, the size of a tower head is reduced as much as possible, a middle-phase V-string suspension mode is suitable for optimizing the tower in a line hanging mode of an ultrahigh-voltage linear iron tower, the steel consumption of the tower is reduced by reducing the size of a tower window, and whether a side-phase V-string suspension mode is adopted or not is reasonably selected based on different meteorological conditions, different tower types and different wires;
(2) selecting a crank arm form: the mode of the crank arm K node of the tower is optimized, the single-loop tower mostly adopts the mode of a straight crank arm, the structure is simple, the stress of the K node is good, the stress of the main material of the crank arm is simple, the mode of a bent crank arm can be adopted, the size of the tower head is reduced, and the tower weight is more economical and reasonable;
(3) optimizing the gradient of the tower body and the size of the tower root opening: the tower body gradient and the tower root opening size are optimized, the tower body gradient and the tower root opening size can directly influence the specifications of the inclined material and the main material of the tower body, and the attractiveness and the weight of the tower can also be influenced. The reasonable gradient of the tower body can lead the tower material to be stressed uniformly, and can lead the change of the material specification to be coordinated with the change of the stress distribution of the tower material, the optimal gradient and the optimal root opening can lead the weight of the whole base iron tower to be the objective function, and the foundation acting force and the stress performance of the component are comprehensively considered for final selection;
(4) optimizing the principle of inclined material arrangement: in order to enable the stress of the web members to be more reasonable, the horizontal angle of the web members is controlled to be between 35 degrees and 45 degrees, in order to prevent the web members from being simultaneously pressed, K-shaped web members are arranged at the partition surfaces, and the quantity of the cross web members among the partition surfaces of the tower body is optimized, so that the diagonal material is simple in arrangement, the force transmission route is clear, the tower body cloth material is uniform and coordinated, the stress conditions of the main diagonal material and the diagonal material are reasonably distributed, the gradient and the length of the diagonal material are optimized, and compared with various arrangement schemes of a minimum shaft, a parallel shaft and the like, small cross and large cross are screened, and the tower weight can be reduced to the maximum extent;
(5) and (3) node construction optimization: the node structure is one of the main links of the optimization design of the tower structure of the overhead transmission line, the calculation mode and the actual tower shape are unified as much as possible through the optimization of the node structure design, and the nodes are simplified as much as possible on the premise of meeting the structural requirements, so that the tower weight can be reduced, the secondary stress can be prevented, and the node structure design mainly follows the following principle: in order to reduce the loss of the section of the rod piece, the hole-aligning arrangement of the two connecting rod pieces is avoided as much as possible; the situations that the node plates are bent and the rod pieces are connected eccentrically are prevented as much as possible; the area of the node plate is required to be as large as possible, and the nodes are connected compactly; in order to reduce the weight of the tower, the number of the wrap angle steel connections needs to be reduced; oblique materials and main materials are arranged by multiple rows of bolts; the omnibearing long and short leg design is suitable for overhead transmission line towers in mountainous areas, so that the natural environment can be well protected, the construction difficulty can be reduced, the construction period can be shortened, and the earthwork engineering quantity can be reduced;
(6) selecting materials of overhead transmission line towers: the overhead transmission line tower can adopt a circular-section steel pipe, so that the stability of the structure can be improved, the length of a rod piece can be reduced, and the wind load of the tower body can be reduced.
The invention has the following beneficial effects:
1. the pole type is enriched, the pole tower uses the composite cross arm to simplify, the structural design cancels the wire iron cross arm for the 110kV double pole, reduces the upper load of the pole tower, optimizes the pole tower structure, enriches the line pole type, and simultaneously, the 110kV double pole line wire is suspended with the composite cross arm and the composite insulator, thereby having high practical value;
2. the line transformation cost is reduced, compared with the prior method of increasing towers and the like to treat the cross spanning problem, the composite cross arm and the composite insulator can effectively utilize a narrow corridor, reduce the height of the towers, are simple and easy to construct, and can save a large amount of manpower, material resources and financial resources.
Drawings
FIG. 1 is a schematic structural diagram of a high-strength metal power tower structure according to the present invention;
fig. 2 is a schematic structural diagram of a composite cross arm structure of a high-strength metal electric power tower structure according to the present invention.
In the figure: the lightning protection structure comprises a reinforced concrete electric pole 1, a first iron cross beam 2, a second iron cross beam 3, a rod-shaped suspension insulator 4, a lightning conductor 5, a connecting block 6, a mounting plate 7, a mounting screw 8, a sheath 9, a core rod 10, a hanging head 11, a connecting base 12, an umbrella skirt 13 and a composite insulator 14.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-2, a high-strength metal electric power tower structure comprises two symmetrically arranged reinforced concrete electric poles 1, wherein the lower ends of the two reinforced concrete electric poles 1 are respectively provided with a mounting mechanism, a first iron cross beam 2 is arranged between the two reinforced concrete electric poles 1, the upper ends of the two reinforced concrete electric poles 1 are jointly and fixedly connected with a horizontally arranged second iron cross beam 3, both sides of the second iron cross beam 3 are respectively provided with a rod-shaped suspension insulator 4, both sides of the two reinforced concrete electric poles 1 are respectively provided with a composite cross arm structure, the two reinforced concrete electric poles 1 are respectively provided with a lightning conductor 5, the lower ends of the two lightning conductors 5 are respectively provided with a connecting block 6, the mounting mechanism comprises a horizontally arranged mounting plate 7, mounting screws 8 are respectively inserted into both sides of the mounting plate 7, the composite cross arm structure comprises a horizontally arranged sheath 9, a core rod 10 is arranged in the sheath 9, both ends of the sheath 9 are respectively provided with a hanging, the side wall of the upper side of the sheath 9 is provided with the umbrella skirt 13, the upper end of the sheath 9 is provided with the composite insulator 14 which is obliquely arranged, the pole type is enriched, the pole tower is simplified by using a composite cross arm, the structural design is realized, a wire iron cross arm is cancelled for a 110kV double pole, the upper load of the pole tower is reduced, the pole tower structure is optimized, the line pole type is enriched, meanwhile, the 110kV double pole line wire is suspended with the composite insulator by using the composite cross arm, the practical value is very high, the line reconstruction cost is reduced, compared with the prior art that the cross-over problem is solved by adopting modes of increasing the pole tower and the like, a narrow corridor can be effectively utilized, the height of the pole tower is reduced, the construction is simple and easy to implement, and a large amount of manpower;
an erection method of a high-strength metal electric power tower structure comprises the following steps:
the method comprises the following steps that (1) tower pole structure selection, namely, an overhead transmission line tower structure is designed based on different altitudes, the electric clearance of the tower is influenced by the altitude, the steel consumption of the tower is seriously influenced, the tower pole structure is straightened, the size of a tower head is reduced as much as possible, a middle-phase V-string suspension mode is suitable for optimizing the tower in a line hanging mode of an ultrahigh-voltage linear iron tower, the steel consumption of the tower is reduced by reducing the size of a tower window, and whether a side-phase V-string suspension mode is adopted or not is reasonably selected based on different meteorological conditions, different tower types and different wires;
(2) selecting a crank arm form: the mode of the crank arm K node of the tower is optimized, the single-loop tower mostly adopts the mode of a straight crank arm, the structure is simple, the stress of the K node is good, the stress of the main material of the crank arm is simple, the mode of a bent crank arm can be adopted, the size of the tower head is reduced, and the tower weight is more economical and reasonable;
(3) optimizing the gradient of the tower body and the size of the tower root opening: the tower body gradient and the tower root opening size are optimized, the tower body gradient and the tower root opening size can directly influence the specifications of the inclined material and the main material of the tower body, and the attractiveness and the weight of the tower can also be influenced. The reasonable gradient of the tower body can lead the tower material to be stressed uniformly, and can lead the change of the material specification to be coordinated with the change of the stress distribution of the tower material, the optimal gradient and the optimal root opening can lead the weight of the whole base iron tower to be the objective function, and the foundation acting force and the stress performance of the component are comprehensively considered for final selection;
(4) optimizing the principle of inclined material arrangement: in order to enable the stress of the web members to be more reasonable, the horizontal angle of the web members is controlled to be between 35 degrees and 45 degrees, in order to prevent the web members from being simultaneously pressed, K-shaped web members are arranged at the partition surfaces, and the quantity of the cross web members among the partition surfaces of the tower body is optimized, so that the diagonal material is simple in arrangement, the force transmission route is clear, the tower body cloth material is uniform and coordinated, the stress conditions of the main diagonal material and the diagonal material are reasonably distributed, the gradient and the length of the diagonal material are optimized, and compared with various arrangement schemes of a minimum shaft, a parallel shaft and the like, small cross and large cross are screened, and the tower weight can be reduced to the maximum extent;
(5) and (3) node construction optimization: the node structure is one of the main links of the optimization design of the tower structure of the overhead transmission line, the calculation mode and the actual tower shape are unified as much as possible through the optimization of the node structure design, and the nodes are simplified as much as possible on the premise of meeting the structural requirements, so that the tower weight can be reduced, the secondary stress can be prevented, and the node structure design mainly follows the following principle: in order to reduce the loss of the section of the rod piece, the hole-aligning arrangement of the two connecting rod pieces is avoided as much as possible; the situations that the node plates are bent and the rod pieces are connected eccentrically are prevented as much as possible; the area of the node plate is required to be as large as possible, and the nodes are connected compactly; in order to reduce the weight of the tower, the number of the wrap angle steel connections needs to be reduced; oblique materials and main materials are arranged by multiple rows of bolts; the omnibearing long and short leg design is suitable for overhead transmission line towers in mountainous areas, so that the natural environment can be well protected, the construction difficulty can be reduced, the construction period can be shortened, and the earthwork engineering quantity can be reduced;
(6) selecting materials of overhead transmission line towers: the overhead transmission line tower can adopt a circular-section steel pipe, so that the stability of the structure can be improved, the length of a rod piece can be reduced, and the wind load of the tower body can be reduced.
According to the invention, the pole type is enriched, the use of the composite cross arm for the pole tower is simplified, the structural design is adopted, the wire iron cross arm is omitted for the 110kV double poles, the upper load of the pole tower is reduced, the pole tower structure is optimized, the line pole type is enriched, meanwhile, the 110kV double pole line wire is suspended with the composite cross arm and the composite insulator, the practical value is very high, the line transformation cost is reduced, compared with the prior method of increasing the pole tower and the like to treat the cross spanning problem, the narrow corridor can be effectively utilized, the height of the pole tower is reduced, the construction is simple and easy to implement, and a large amount of manpower, material resources and financial resources can be saved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The utility model provides a high strength metal electric power tower structure, includes reinforced concrete pole (1) that two symmetries set up, its characterized in that, two the lower extreme of reinforced concrete pole (1) all is equipped with installation mechanism, and is equipped with first indisputable crossbeam (2), two between two reinforced concrete poles (1) the common fixed connection in upper end of reinforced concrete pole (1) has second indisputable crossbeam (3) that the level set up, the both sides of second indisputable crossbeam (3) all are equipped with stick type suspension insulator (4), two the both sides of reinforced concrete pole (1) all are equipped with compound cross arm structure, two all draw on reinforced concrete pole (1) and establish lightning conductor (5), and the lower extreme of two lightning conductors (5) all is equipped with connecting block (6).
2. A high strength metal electric tower structure as claimed in claim 1, wherein said mounting means comprises a horizontally disposed mounting plate (7), and mounting screws (8) are inserted into both sides of the mounting plate (7).
3. The high-strength metal electric tower structure according to claim 1, wherein the composite cross arm structure comprises a horizontally arranged sheath (9), a core rod (10) is arranged in the sheath (9), two ends of the sheath (9) are respectively provided with a hanging head (11) and a connecting base (12), the upper side wall of the sheath (9) is provided with an umbrella skirt (13), and the upper end of the sheath (9) is provided with an obliquely arranged composite insulator (14).
4. An erection method of a high-strength metal electric tower structure according to claim 1, characterized by comprising the steps of:
(1) selecting a tower rod structure: the structure of the overhead transmission line tower is designed based on different altitudes, the electric clearance of the tower is influenced by the altitudes, the steel consumption of the tower is seriously influenced, the straightness is realized, the size of a tower head is reduced as much as possible, a middle-phase V-string suspension mode is suitable for optimizing the tower in a line hanging mode of an ultrahigh-voltage linear iron tower, the steel consumption of the tower is reduced by reducing the size of a tower window, and whether a side-phase V-string suspension mode is adopted or not is reasonably selected based on different meteorological conditions, different tower types and different wires;
(2) selecting a crank arm form: the mode of the crank arm K node of the tower is optimized, the single-loop tower mostly adopts the mode of a straight crank arm, the structure is simple, the stress of the K node is good, the stress of the main material of the crank arm is simple, the mode of a bent crank arm can be adopted, the size of the tower head is reduced, and the tower weight is more economical and reasonable;
(3) optimizing the gradient of the tower body and the size of the tower root opening: the tower body gradient and the tower root opening size are optimized, the tower body gradient and the tower root opening size can directly influence the specifications of the inclined material and the main material of the tower body, and the attractiveness and the weight of the tower can also be influenced.
5. The reasonable gradient of the tower body can lead the tower material to be stressed uniformly, and can lead the change of the material specification to be coordinated with the change of the stress distribution of the tower material, the optimal gradient and the optimal root opening can lead the weight of the whole base iron tower to be the objective function, and the foundation acting force and the stress performance of the component are comprehensively considered for final selection;
(4) optimizing the principle of inclined material arrangement: in order to enable the stress of the web members to be more reasonable, the horizontal angle of the web members is controlled to be between 35 degrees and 45 degrees, in order to prevent the web members from being simultaneously pressed, K-shaped web members are arranged at the partition surfaces, and the quantity of the cross web members among the partition surfaces of the tower body is optimized, so that the diagonal material is simple in arrangement, the force transmission route is clear, the tower body cloth material is uniform and coordinated, the stress conditions of the main diagonal material and the diagonal material are reasonably distributed, the gradient and the length of the diagonal material are optimized, and compared with various arrangement schemes of a minimum shaft, a parallel shaft and the like, small cross and large cross are screened, and the tower weight can be reduced to the maximum extent;
(5) and (3) node construction optimization: the node structure is one of the main links of the optimization design of the tower structure of the overhead transmission line, the calculation mode and the actual tower shape are unified as much as possible through the optimization of the node structure design, and the nodes are simplified as much as possible on the premise of meeting the structural requirements, so that the tower weight can be reduced, the secondary stress can be prevented, and the node structure design mainly follows the following principle: in order to reduce the loss of the section of the rod piece, the hole-aligning arrangement of the two connecting rod pieces is avoided as much as possible; the situations that the node plates are bent and the rod pieces are connected eccentrically are prevented as much as possible; the area of the node plate is required to be as large as possible, and the nodes are connected compactly; in order to reduce the weight of the tower, the number of the wrap angle steel connections needs to be reduced; oblique materials and main materials are arranged by multiple rows of bolts; the omnibearing long and short leg design is suitable for overhead transmission line towers in mountainous areas, so that the natural environment can be well protected, the construction difficulty can be reduced, the construction period can be shortened, and the earthwork engineering quantity can be reduced;
(6) selecting materials of overhead transmission line towers: the overhead transmission line tower can adopt a circular-section steel pipe, so that the stability of the structure can be improved, the length of a rod piece can be reduced, and the wind load of the tower body can be reduced.
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Cited By (1)
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CN113266192A (en) * | 2021-04-13 | 2021-08-17 | 北方工业大学 | Bracing wire reinforcing method for tower body of self-supporting power transmission tower |
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WO2018070593A1 (en) * | 2016-10-11 | 2018-04-19 | 주식회사 성진 | Fixed type temporary arm apparatus and method used for non-blackout power distribution work |
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CN113266192A (en) * | 2021-04-13 | 2021-08-17 | 北方工业大学 | Bracing wire reinforcing method for tower body of self-supporting power transmission tower |
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