CN212837035U

CN212837035U - Cantilever power transmission tower

Info

Publication number: CN212837035U
Application number: CN202020509267.4U
Authority: CN
Inventors: 于周平; 刘贤; 刘超; 黄树鑫; 徐浩潇
Original assignee: Shaoxing University Yuanpei College
Current assignee: Shaoxing University Yuanpei College
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2021-03-30
Anticipated expiration: 2030-04-09

Abstract

The utility model discloses a cantilever power transmission tower, which comprises four box-type columns; the top ends of two oppositely arranged box-type columns are respectively connected with cantilever beams, the two cantilever beams and the connected box-type columns are positioned in a first plane, and the tops of the two cantilever beams are used as hanging wire ends connected with a power transmission line; the transverse guy cable is connected between the tops of the two cantilever beams; the two steel members are connected to the box column and are V-shaped, the two steel members are distributed on the left side and the right side of the first plane, and the V-shaped tips of the steel members are back to the first plane; four diagonal draw bars respectively connected between the top end of the cantilever beam and the V-shaped tip end of the steel member; two sets of side cable of connecting respectively between the V-arrangement pointed end of steel member and ground, each group contains two side cable. The utility model discloses can bear the dead weight of hanging wire and insulator chain, reduce the wind load and with the influence of the vibration effect that pulsating wind caused to can reach material saving and construction cost's effect.

Description

Cantilever power transmission tower

Technical Field

The application belongs to the technical field of building engineering, and particularly relates to a cantilever power transmission tower.

Background

In recent years, with the development of energy, the energy transfer to the west and north is accelerated, and the distance between an energy base and a load center is further and further increased. Therefore, in order to meet the urgent needs of large-scale and long-distance energy transmission and large-scale optimal configuration, the development of an extra-high voltage power transmission channel is inevitable. The power transmission tower is used as the most important basic unit of a power transmission channel, is a direct supporting structure of a power transmission line and is a high-rise structure. Because the environment and the terrain of the power transmission tower are complex and bear various loads including wind load, ice load, ground wire load and the like, the safety and the reliability of the power transmission tower are closely concerned by broad students and designers for a long time. In recent years, transmission towers adopted in extra-high voltage transmission channels tend to be large-sized gradually, numerous structural forms appear, and the problem that the whole transmission towers are greatly influenced by wind load exists.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a cantilever transmission tower can bear the dead weight of hanging wire and insulator chain, reduces wind load and with the influence of the vibration effect that pulsating wind arouses to can reach material saving and construction cost's effect.

In order to achieve the purpose, the technical scheme adopted by the application is as follows:

a cantilever power transmission tower disposed on the ground for connecting a power transmission line, the cantilever power transmission tower comprising:

the four box-shaped columns are vertically arranged on the ground and distributed in a diamond shape;

the top ends of two oppositely arranged box-type columns of the four box-type columns are respectively connected with cantilever beams, the two cantilever beams and the connected box-type columns are positioned in the same plane, the plane is a first plane, the distance between the two cantilever beams is increased towards the direction far away from the box-type columns, and the tops of the two cantilever beams are used as hanging wire ends connected with a power transmission line;

the transverse guy cable is connected between the tops of the two cantilever beams;

the two steel members are connected to the box column and are V-shaped, the two steel members are distributed on the left side and the right side of the first plane, and the V-shaped tips of the steel members are back to the first plane;

four diagonal draw bars respectively connected between the top end of the cantilever beam and the V-shaped tip end of the steel member;

two sets of side cable of connecting respectively between the V-arrangement pointed end of steel member and ground, each group contains two side cables, and the distance between two side cables in the same group increases towards keeping away from steel member one side.

Preferably, among the four box columns, a plurality of L-shaped angle steels are connected between two adjacent box columns to serve as cross beams, the L-shaped angle steels are horizontally connected, and the L-shaped angle steels positioned between the two adjacent box columns are distributed at equal intervals from top to bottom.

Preferably, the vertical space between two adjacent box-type columns is divided into a plurality of layers by L-shaped angle steel, X-shaped side braces are connected in each layer of space, and the four top ends of the X-shaped side braces are respectively fixed with the four end angles of the layer where the X-shaped side braces are located.

Preferably, a plane supporting arm is connected between the bottoms of the two cantilever beams.

Preferably, two oppositely arranged box columns connected with the cantilever beam in the four box columns are first box columns, and the other oppositely arranged box columns are second box columns;

two V-arrangement bottoms of steel member are connected with two first box post respectively, and the V-arrangement pointed end of steel member is located outside the rhombus place scope, and the V-arrangement pointed end of steel member is located the central line of two first box post connecting wires.

Preferably, the two V-shaped bottom ends of the steel member are located at the same height, and the V-shaped tip end of the steel member is higher than the two V-shaped bottom ends.

Preferably, an upper brace and a lower brace are connected between the V-shaped tip of the steel member and the second box-shaped column on the side where the V-shaped tip is located, the height of the connecting point of the upper brace and the second box-shaped column on the corresponding side is higher than that of the V-shaped tip, and the height of the connecting point of the lower brace and the second box-shaped column on the corresponding side is lower than that of the V-shaped bottom end.

According to the cantilever power transmission tower, four box-type columns distributed in a diamond shape are used as a main body structure, so that the anti-torque of the structure can be improved, and the consumable materials of the lower structure of the power transmission tower are reduced; the top ends of the two cantilever beams are used as the wire hanging ends, the structure form is simple, force transmission is clear, materials are saved, and the construction cost is reduced; the side inhaul cable can be used as a damping piece in the power transmission tower structure, so that the structural integrity can be improved, the torque borne by the power transmission tower structure is transmitted to the foundation, and the influence of the vibration effect caused by pulsating wind is reduced.

Drawings

Fig. 1 is a schematic structural view of a cantilever transmission tower of the present application;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a left side view of FIG. 1;

FIG. 4 is a front view of FIG. 1;

FIG. 5 is a schematic view of a Y-shaped structure of the present application;

FIG. 6 is a schematic view of a V-shaped structure of the present application.

In the drawings: 1. a wire hanging end; 2. a cantilever beam; 3. diagonal draw bars; 4. a box column; 5. a lateral stay cable; 6. x-shaped side braces; 7. l-shaped angle steel; 8. a transverse stay cable; 9. a planar support arm; 10. a steel member; 101. a V-shaped tip; 102. a V-shaped bottom end; 11. pulling up a strip; 12. and (4) pulling the strip downwards.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is noted that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present; when an element is referred to as being "secured" to another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

In one embodiment, a cantilever transmission tower is provided for installation on the ground for connecting to a transmission line. As shown in fig. 1 to 4, the cantilever power transmission tower of the present embodiment includes:

four box-type columns 4 which are vertically arranged on the ground and distributed in a diamond shape. The main column of the power transmission tower adopts a box-shaped section column, so that the bearing capacity is high, and materials are saved. And taking the height area of the box-type column as the lower main body structure of the power transmission tower. The bottom rectangle in fig. 1 is a schematic area of the ground.

Four box type posts 4 vertical settings and be the rhombus distribution in this embodiment, consequently the transmission tower of this embodiment is small-section transmission tower, and area is little, easily installation.

In order to further improve the stability of the main structure of the lower part of the power transmission tower, in one embodiment, among the four box-shaped columns 4, a plurality of L-shaped angle steels 7 are connected between two adjacent box-shaped columns 4 as cross beams, each L-shaped angle steel 7 is horizontally connected, and the plurality of L-shaped angle steels 7 located between two adjacent box-shaped columns 4 are distributed at equal intervals from top to bottom.

The crossbeam adopts L type angle steel, and L type angle steel can bear the axial tension and the pressure that box post 4 transmitted to for box post 4 provides the restraint, reduce single box post 4's slenderness ratio, improve the stability of post.

The main structure of the lower part of the power transmission tower adopts box-shaped columns 4 which are distributed in a prismatic shape, and the columns are connected by L-shaped angle steel 7, so that the overall stability of the lower part of the power transmission tower is improved, and the power transmission tower can bear and transmit load to a foundation. In addition, the main structure arranged in a diamond shape can improve the torque resistance of the structure and reduce the consumable materials of the lower structure of the power transmission tower.

On the basis of arranging the L-shaped angle steel 7 between the box-type columns 4, in another embodiment, the vertical space between two adjacent box-type columns 4 is divided into a plurality of layers by the L-shaped angle steel 7, an X-shaped side brace 6 is connected in each layer of space, and the four top ends of the X-shaped side brace 6 are respectively fixed with the four end angles of the layer.

The X-shaped side brace 6 can restrain the deformation of the side face of the structure and improve the overall stability of the structure. Four tops of the X-shaped side brace 6 are fixed with four end angles of the layer where the X-shaped side brace 6 is located respectively, so that the four tops of the X-shaped side brace 6 are abutted against the four tops of the two L-shaped angle steels 7 located above and below the X-shaped side brace, and the anti-deformation capacity is improved.

In four box posts 4 of this embodiment, wherein two box posts 4 tops of arranging relatively are connected with cantilever beam 2 respectively, and two cantilever beams 2 are in the coplanar with the box post 4 of being connected, and this plane is the first plane, and the distance between two cantilever beams 2 increases towards the direction of keeping away from box post 4, and the top of two cantilever beams 2 is as connecting transmission line's string line end 1.

The top parts of the two cantilever beams 2 are used as the wire hanging ends 1, so that the structure is simple, and force transmission is clear. And in order to improve the bearing capacity of the two cantilever beams 2, a transverse guy cable 8 is connected between the tops of the two cantilever beams 2, so that the two cantilever beams 2 are mutually restrained.

In addition, in an embodiment, a planar supporting arm 9 is connected between the bottoms of the two cantilever beams 2, the planar supporting arm 9 and the two cantilever beams 2 form a Y-shaped structure as shown in fig. 5, and a Y-shaped structure layer is adopted in the power transmission tower structure as a power transmission tower hanging power transmission line layer, so that the power transmission tower can bear the dead weight of a hanging line and an insulator string, materials are saved, and the construction cost is reduced.

The plane supporting arm 9 is arranged between the bottoms of the two cantilever beams 2, namely between the tops of the two corresponding box-type columns 4, so that the box-type column 4 body at the middle lower part of the power transmission tower can bear the pressure transmitted by the two cantilever beams, and the reliability of the structure is ensured.

The steel structure comprises two steel members 10 which are connected to the box column 4 and are V-shaped, wherein the two steel members 10 are distributed on the left side and the right side of the first plane, and the V-shaped tips of the steel members 10 face away from the first plane. As shown in fig. 6, the proximate end of the V-shape is the tip 101 of the V-shape and the two separate ends are the bottom 102 of the V-shape.

And also four diagonal braces 3 respectively connected between the top ends of the cantilever beams 2 and the V-shaped tip 101 of the steel member 10. In this embodiment, the number of the steel members 10 is two, and the number of the cantilever beams is two, so that the V-shaped tip 101 of each steel member 10 is connected with two diagonal braces 3, and the two diagonal braces 3 are respectively connected with one cantilever beam.

The height area of the cantilever beam is used as the upper structure of the power transmission tower, and the diagonal draw bars 3 are designed between the upper structure and the lower main body structure, so that the stress of the upper cantilever beam 2 can be greatly reduced; the oblique draw bar 3 can improve the wholeness of transmission tower superstructure and lower part major structure on the one hand, and on the other hand can provide the restraint for 2 structures of upper portion cantilever beam, and then improves the bearing capacity of transmission tower structure. In the embodiment, structures such as a brace and a stay cable are adopted to increase the transmission of force between the upper and lower structures, and the torsion resistance of the small-section power transmission tower is improved.

This embodiment still includes two sets of side cable 5 of connecting respectively between the pointed end 101 of the V-arrangement of steel member 10 and ground, and each group contains two side cable 5, and two side cable 5 with the group are connected with same steel member 10, and the distance between two side cable 5 with the group increases towards keeping away from steel member 10 one side. The side inhaul cable 5 can be used as a damping piece in the power transmission tower structure, so that the structural integrity can be improved, the torque borne by the power transmission tower structure is transmitted to the foundation, and the influence of wind load and a vibration effect caused by fluctuating wind is reduced.

In another embodiment, in order to strengthen the constraint between the upper structure and the lower main structure of the transmission tower, four of the box columns 4 are provided, the two oppositely arranged box columns 4 connected with the cantilever beam 2 are the first box column, and the other oppositely arranged box column 4 is the second box column.

Two V-arrangement bottoms of steel member 10 are connected with two first box post respectively, and the V-arrangement pointed end of steel member 10 is located outside the rhombus place scope, and the V-arrangement pointed end of steel member 10 is located the central line of two first box post connecting lines, guarantees the stress of furthest's reduction cantilever beam.

And the two V-shaped bottom ends 102 of the steel member 10 are located at the same height, and the V-shaped tip 101 of the steel member 10 is higher than the two V-shaped bottom ends 102. An upper brace 11 and a lower brace 12 are connected between the V-shaped tip 101 of the steel member 10 and the second box-type column on the side where the V-shaped tip 101 is located.

Wherein the height of the connection point of the upper brace 11 and the corresponding side second box-type column is higher than the V-shaped tip 101, and the height of the connection point of the lower brace 12 and the corresponding side second box-type column is lower than the V-shaped bottom 102, thereby significantly improving the integrity between the upper structure and the lower body structure of the power transmission tower and the load-bearing capacity of the power transmission tower.

The structural advantages of the cantilever transmission tower of the present application are further illustrated below with reference to the following examples.

Example 1

The feasibility of the cantilever power transmission tower structure is verified through a simulated loading test.

1. The materials and parameters used for making the structural model were as follows:

(1) bamboo chip: the density is 0.8g/cm3, the grain tensile strength is 60MPa, the compressive strength is 30MPa, and the elastic modulus is 6 GPa.

(2) Bonding material: 502 glue.

2. Making models and their rods

(1) The main column (box column) is designed into a box section, the section dimension b multiplied by h is 8mm multiplied by 8mm, the wall thickness is 1mm, the height is 700mm, and a stiffening rib is arranged in the main column at an interval of 100mm on average, so that the integrity of the box column is ensured.

(2) The cantilever beam is designed into a box-shaped section, the section dimension b multiplied by h is 12mm multiplied by 12mm, the wall thickness is 1mm, and the length is 450 mm.

(3) The beam (L-shaped angle steel) is of an L-shaped rod structure, the two sides are 6mm and 7mm respectively, the length is 500mm, and the thickness of each side of the rod is 1 mm.

(4) The plane supporting arm adopts a box-shaped section rod, the section size is 7mm multiplied by 7mm, and the wall thickness is 1 mm; on average, every 30mm of stiffening ribs are designed in the member.

(5) The steel member adopts a triangular box-shaped section bar, the section size is 7mm multiplied by 7mm, and the wall thickness is 1 mm; and stiffening ribs are arranged in the box-shaped rod according to the trisection points of the length of the rod.

(6) The X-shaped side brace is made of bamboo chips with the size of 2mm multiplied by 2mm, and the arrangement form is X-shaped cross arrangement.

(7) The side stay cable and the transverse stay cable are simulated by adopting bamboo chips with the size of 1mm multiplied by 6mm, and the diagonal draw bars, the upper stay cables and the lower stay cables are manufactured by adopting bamboo chips with the size of 2mm multiplied by 3 mm.

The model is a lower main body structure formed by four main columns and nine layers of cross beams, the main columns are arranged in a prismatic shape, and the side surfaces are connected by X-shaped side braces. The top surface of the lower main body structure is provided with a plane supporting arm. The outside adopts the mode of peripheral hardware cable, guarantees the stability of structure to on the effectual transmission to infrastructure of moment of torsion that produces the structure. The connection between each part of the model is bonded by 502 glue, the joints of the parts are filled by bamboo chips or bamboo powder, and the joints are adhered by 502 glue. The end of the rod piece is polished, so that the connection is more compact and reliable.

3. Model loading mode

The feasibility of the verification scheme of the working condition of the load of the actual power transmission tower is simulated through model loading, and the loading mode is as follows:

(1) the one-level loading is the iron chain dead weight loading, and two iron chain length are 1.2 meters, and the one end of two iron chains is fixed at 1 meter's height, and the other end is respectively hung on each top of cantilever beam, and every weight is 108N, and the iron chain is 1 meter along the vertical direction horizontal projection distance of ox horn top line during the loading, and the iron chain hangs down freely. The one-level loading simulated stress condition of the power transmission tower under the load action of the unidirectional power transmission line verifies the stability of the structure.

(2) The secondary loading is that on the basis of the primary loading, 600N horizontal loads are added in the reverse direction of the primary loading on the top end of the cantilever beam, the load balance weight is connected with the top end of the cantilever beam through a steel wire, and the stability of the structure is verified under the condition that two sides of the actual power transmission tower are subjected to asymmetric loads through the secondary loading.

(3) And (3) carrying out tertiary loading, namely shearing the steel wire of the load counterweight on the basis of secondary loading. When the three-level loading imitates that the power transmission tower is subjected to asymmetric horizontal load instantly, the structural stability of the power transmission tower is verified according to the torsional load condition of the power transmission tower.

4. Results of the Loading test

The model structure can smoothly pass through the first-level loading and the second-level loading, and has small deformation and good structural stability. In the three-level loading process, small deformation occurs in the range of the first layer beam and the second layer beam of the structure, but the deformation is in an allowable range. The model finally bears the three-level load and safely passes through all loading links. The model is a small cross-section structure, the main structure is somewhat flexible, so there is little deformation in the lower main structure within the allowable range. The transmission tower can be used in practical engineering.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A cantilever power transmission tower disposed on the ground for connecting a power transmission line, the cantilever power transmission tower comprising:

four box-shaped columns (4) which are vertically arranged on the ground and distributed in a diamond shape;

the top ends of two oppositely arranged box type columns (4) in the four box type columns (4) are respectively connected with cantilever beams (2), the two cantilever beams (2) and the connected box type columns (4) are positioned in the same plane, the plane is a first plane, the distance between the two cantilever beams (2) is increased towards the direction far away from the box type columns (4), and the tops of the two cantilever beams (2) are used as hanging wire ends (1) connected with the power transmission line;

a transverse guy cable (8) connected between the tops of the two cantilever beams (2);

the two steel members (10) are connected to the box column (4) and are V-shaped, the two steel members (10) are distributed on the left side and the right side of the first plane, and the V-shaped tips of the steel members (10) are back to the first plane;

four diagonal draw bars (3) respectively connected between the top end of the cantilever beam (2) and the V-shaped tip end of the steel member (10);

two sets of side cable (5) of connecting respectively between the V-arrangement pointed end of steel member (10) and ground, each group contains two side cable (5), and the distance between two side cable (5) in the same group increases towards keeping away from steel member (10) one side.

2. The cantilever transmission tower of claim 1, wherein, among the four box-type columns (4), a plurality of L-shaped angle steels (7) are connected between two adjacent box-type columns (4) as cross beams, each L-shaped angle steel (7) is horizontally connected, and the plurality of L-shaped angle steels (7) between two adjacent box-type columns (4) are distributed at equal intervals from top to bottom.

3. The cantilever transmission tower according to claim 2, wherein the vertical space between two adjacent box pillars (4) is divided into a plurality of layers by L-shaped angle steel (7), X-shaped side braces (6) are connected to each layer of the space, and the four top ends of the X-shaped side braces (6) are fixed to the four end corners of the layer.

4. The cantilever transmission tower according to claim 1, wherein a planar support arm (9) is connected between the bottom of the two cantilever beams (2).

5. The cantilever transmission tower according to claim 1, wherein of the four box columns (4), the two oppositely disposed box columns (4) to which the cantilever beams (2) are connected are the first box column, and the other oppositely disposed box column (4) is the second box column;

two V-arrangement bottoms of steel member (10) are connected with two first box post respectively, and the V-arrangement of steel member (10) is most advanced to be located outside the rhombus place scope, and the V-arrangement of steel member (10) is most advanced to be located the central line of two first box post connecting lines.

6. The cantilever transmission tower according to claim 5, wherein the two V-shaped bottom ends of the steel member (10) are located at the same height, and the V-shaped tip of the steel member (10) is higher than the two V-shaped bottom ends.

7. The cantilever power transmission tower according to claim 6, wherein an upper brace (11) and a lower brace (12) are connected between the V-shaped tip of the steel member (10) and the second box-type column on the side of the V-shaped tip, the height of the connection point of the upper brace (11) and the corresponding second box-type column is higher than that of the V-shaped tip, and the height of the connection point of the lower brace (12) and the corresponding second box-type column is lower than that of the V-shaped bottom.