Self-prebiasing strain angle tower and prebiasing method of strain angle tower

Abstract

The invention belongs to the technical field of power transmission line iron towers, and particularly relates to a self-prebiasing strain angle tower and a prebiasing method of the strain angle tower. The self-prebiasing strain angle tower comprises a tower body, a tower head and tower legs; the tower head comprises two inner angle side stand columns and two outer angle side stand columns which are arranged at intervals in the first horizontal direction, and the two inner angle side stand columns and the two outer angle side stand columns are arranged in the second horizontal direction perpendicular to the first horizontal direction. The reference plane is perpendicular to the horizontal plane and the axis in the second horizontal direction, and a reference axis with the length direction arranged in the first horizontal direction is arranged on the reference plane; the included angle alpha between the projection of the inner angle side stand column on the reference face and the reference axis located on the inner angle side of the tower head is larger than the outer angle side included angle gamma between the projection of the outer angle side stand column on the reference face and the reference axis located on the outer angle side of the tower head, and the bottom faces of the tower legs are parallel to the horizontal plane. Pre-deflection of the whole tower head towards the outer angle side is achieved, processing, manufacturing and assembling of the tower legs are facilitated, and the tower body is easy to erect.

Description

Technical Field

[0001] The present invention belongs to the technical field of transmission line towers, and particularly relates to a self-prebiased tension angle tower and a prebiasing method for a tension angle tower. Background Art

[0002] The angle tower is an important tower type in transmission line towers, which is arranged at the corner of the transmission line to support and deflect the conductors. After the angle tower is strung, it will be continuously pulled by the deflecting conductors in two different horizontal directions. The resultant force of the horizontal tensile forces of the deflecting conductors on the angle tower is in the direction of the inner angle of the angle tower. Under the action of the resultant force of the deflecting conductors, the tower will tilt towards the inner angle side. To balance the forces on the angle tower and prevent it from tilting towards the inner angle side, generally, the foundation of the angle tower is pre-lifted to achieve prebiasing of the angle tower. That is, the top surface of the foundation of the angle tower is set as an inclined plane with an inclined angle equal to the prebiasing angle of the angle tower. The tower legs of the angle tower are installed on the inclined plane of the foundation, and the bottom surfaces of the four tower legs are all in contact with the inclined plane of the foundation. The tower legs and the foundation are connected by bolts embedded in the foundation. The high side of the foundation of the angle tower is located on the inner angle side of the angle tower.

[0003] In the above-mentioned erection structure of the angle tower, the lengths of the tower legs on the inner angle side and the outer angle side of the angle tower are different, and it is required that the bottom surfaces of the four tower legs are all on the same inclined plane. The manufacturing process of the tower legs is cumbersome, with high precision requirements and great processing difficulty, making it difficult to ensure the processing precision. In the actual construction process, it is also difficult to ensure the pouring precision of the inclined plane on the foundation of the angle tower, which will ultimately result in a large gap between the bottom plate of the tower leg and the foundation. To ensure the smooth installation of the angle tower, on-site construction personnel often forcibly pull down and fasten the tower legs to the foundation, which will cause deformation of the main diagonal members on the tower body and affect the stability of the angle tower. The processing deviation of the tower legs and the pouring deviation of the foundation of the angle tower will both increase with the increase of the root opening value of the angle tower. When the inclination value on the foundation of the angle tower is greater than 5‰, the gap between the bottom surface of the tower leg and the foundation will be too large, making it difficult to erect the tower body. In addition, the embedded bolts on the foundation are arranged perpendicular to the horizontal plane. After the tower is erected, there is a wedge-shaped gap between the nuts and washers on the embedded bolts and the bottom plate of the tower leg, and partial stress on the nuts and washers makes the erected tower have potential safety hazards. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a self-prebiased tension angle tower and a prebiasing method for a tension angle tower, which facilitate the processing, manufacturing and erection of the angle tower, reduce the erection difficulty of the angle tower, reduce the construction volume of the foundation of the angle tower, and improve the installation reliability of the angle tower.

[0005] The technical solution adopted by the present invention to solve this technical problem is: a self-prebiased tension and angle tower, including a tower body, a tower head is provided at the upper end of the tower body, and a plurality of tower legs are provided at the lower end of the tower body; the tower head includes a tower pole, a cross arm and a ground wire support, the cross arm and the ground wire support are both arranged on the tower pole and the height position of the ground wire support is higher than the height position of the cross arm; its characteristics are:

[0006] The tower pole includes an inner angle side column arranged on its inner angle side and an outer angle side column arranged on its outer angle side, the inner angle side column and the outer angle side column are arranged at intervals along the first horizontal direction; both the inner angle side column and the outer angle side column are provided with two, and the two inner angle side columns are arranged at intervals along the second horizontal direction, and the two outer angle side columns are arranged at intervals along the second horizontal direction; the second horizontal direction is perpendicular to the first horizontal direction; the lower ends of the inner angle side column and the outer angle side column are both fixedly connected to the upper end of the tower body;

[0007] The projections of the cross arm and the ground wire support on the horizontal plane are both arranged along the first horizontal direction, the cross arm is arranged to incline upward from the end far from the inner angle side to the end close to the inner angle side, and the height position of the end of the ground wire support close to the inner angle side is higher than the height position of the end close to the outer angle side;

[0008] It also includes a reference plane that is perpendicular to both the horizontal plane and the axis of the second horizontal direction, and a reference axis with a length direction arranged along the first horizontal direction is provided on the reference plane; the included angle between the projection of the inner angle side column on the reference plane and the reference axis located on the inner angle side of the tower head is the inner angle side included angle α, and the included angle between the projection of the outer angle side column on the reference plane and the reference axis located on the outer angle side of the tower head is the outer angle side included angle γ, and the inner angle side included angle α is greater than the outer angle side included angle γ; the included angle between the cross arm and the horizontal plane is (α - γ) / 2; the bottom surfaces of the plurality of tower legs are all parallel to the horizontal plane.

[0009] Further, the tower body includes main materials with a length arranged in the up and down direction, there are 4 main materials, and the 4 main materials are evenly distributed in the circumferential direction of the central axis perpendicular to the horizontal plane, and the main materials are arranged to incline upward from the outside to the inside along the radial direction of the central axis;

[0010] A horizontal member and an inclined member are provided between two adjacent main materials, and two adjacent main materials are connected by the horizontal member and the inclined member, and the upper end surface of the horizontal member is the upper end surface of the tower body.

[0011] Further, the main material includes two angle steels arranged in parallel and symmetrically at intervals, and the two side walls of the two angle steels close to each other are parallel to each other and the right-angle openings face away from each other; a transition steel plate is provided between the two angle steels and they are connected by the steel plate.

[0012] Furthermore, it further includes an inner - angle side adapter seat and an outer - angle side adapter seat; the inner - angle side adapter seat includes a first adapter plate, on which there is an adapter seat plate parallel to the horizontal plane, an inner - angle side upper shoe plate located above the adapter seat plate, and an inner - angle side lower shoe plate located below the adapter seat plate. Both the inner - angle side upper shoe plate and the inner - angle side lower shoe plate are perpendicular to the first adapter plate. The tower body, the inner - angle side upright column, the adapter seat plate, the inner - angle side upper shoe plate, and the inner - angle side lower shoe plate are all arranged on the same side of the first adapter plate. The inner - angle side upper shoe plate is parallel to the inner - angle side upright column and is located on the side of the inner - angle side upright column away from the outer - angle side upright column;

[0013] The outer - angle side adapter seat includes a second adapter plate, on which there is an adapter seat plate parallel to the horizontal plane, an outer - angle side upper shoe plate located above the adapter seat plate, and an outer - angle side lower shoe plate located below the adapter seat plate; both the outer - angle side upper shoe plate and the outer - angle side lower shoe plate are perpendicular to the second adapter plate. The tower body, the outer - angle side upright column, the adapter seat plate, the outer - angle side upper shoe plate, and the outer - angle side lower shoe plate are all arranged on the same side of the second adapter plate. The outer - angle side upper shoe plate is parallel to the outer - angle side upright column and is located on the side of the outer - angle side upright column away from the inner - angle side upright column;

[0014] The tower body is located below the adapter seat plate and the top surface of the tower body abuts against the adapter seat plate. The same main material on the inner - angle side of the tower body abuts against both the inner - angle side lower shoe plate and the first adapter plate and is bolted and connected; the same main material on the outer - angle side of the tower body abuts against the outer - angle side lower shoe plate and the first adapter plate and is bolted and connected;

[0015] The tower head is located above the adapter seat plate and the lower end surfaces of both the inner - angle side upright column and the outer - angle side upright column abut against the adapter seat plate; the side wall of the same inner - angle side upright column is simultaneously in close contact with and bolted to both the first adapter plate and the outer - angle side upper shoe plate, and the side wall of the same outer - angle side upright column is simultaneously in close contact with and bolted to both the second adapter plate and the outer - angle side upper shoe plate.

[0016] Furthermore, the upper end surface of the horizontal member is located below the adapter seat plate and the two are bolted and connected.

[0017] Furthermore, the main material includes two angle steels arranged in parallel, symmetrically spaced, and with the two side walls close to each other being parallel and the right - angle openings facing away from each other; there is a transfer steel plate between the two angle steels and they are connected by the steel plate;

[0018] Both the inner - angle side lower shoe plate and the outer - angle side lower shoe plate are located between the two angle steels of the main material and are bolted to the angle steels.

[0019] Further, the adapter plate on the inner angle side adapter base, the upper shoe plate on the inner angle side, and the lower shoe plate on the inner angle side are all welded to the first adapter plate. The lower end of the upper shoe plate on the inner angle side and the upper end of the lower shoe plate on the inner angle side are both welded to the adapter plate on the inner angle side adapter base.

[0020] The adapter plate on the outer angle side adapter base, the upper shoe plate on the outer angle side, and the lower shoe plate on the outer angle side are all welded to the second adapter plate. The lower end of the upper shoe plate on the outer angle side and the upper end of the lower shoe plate on the outer angle side are both welded to the adapter plate on the outer angle side adapter base.

[0021] Further, there are 4 tower legs, and the 4 tower legs are evenly distributed on the lower end surface of the tower body.

[0022] The pre-bias method for forming any one of the above-mentioned self-pre-biased tension angle towers includes the following steps:

[0023] S1. Rotate the entire tower head counterclockwise by a pre-bias angle θ with the axis of the second horizontal direction where the lower end of the outer angle side column of the original tension angle tower is located as the rotation axis. During this process, while the lower end of the inner angle side column of the original tension angle tower moves upward, it also moves inward along the first horizontal direction towards the inner angle side.

[0024] The original tension angle tower is the tension angle tower before pre-bias; the lengths of the inner angle side column and the outer angle side column on the tower head of the original tension angle tower are equal, and the lower ends are located on the same plane parallel to the horizontal plane, and the angles of the inner angle side included angle and the outer angle side included angle are the same.

[0025] S2. Extend the inner angle side column formed in step S1 downward along its length direction to connect to the upper end of the tower body to obtain the self-pre-biased tension angle tower according to any one of claims 1 - 8.

[0026] Further, the pre-bias angle of the tower head on the tension angle tower formed after step S1 is θ;

[0027] θ = arctan(f / H);

[0028] H is the height value from the bottom end to the top end of the tower head on the original tension angle tower;

[0029] f is the pre-bias distance of the top end of the tower head along the first horizontal direction away from the inner angle side;

[0030] The height that the lower end of the inner angle side column on the tension angle tower formed after step S1 moves upward is h, and the distance that the lower end of the inner angle side column on the tension angle tower formed after step S1 offsets inward along the first horizontal direction towards the inner angle side is B1;

[0031] h = B × sinθ;

[0032] B1 = h × [tan(θ + β) - tan(θ / 2)];

[0033] B is the distance between the lower end of the center line of the inner corner side column and the lower end of the center line of the outer corner side column in the first horizontal direction;

[0034] β is the angle between the center line of the inner corner side column and the reference vertical plane perpendicular to the first horizontal direction.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows: A self-pre-biased tension-angle tower and a pre-biasing method for a tension-angle tower are provided. By setting the inner corner side column and the outer corner side column and making the inner corner side angle α between the inner corner side column on the tower head and the reference axis greater than the outer corner side angle γ between the outer corner side column and the reference axis, the whole tower head is pre-biased towards the outer corner side, the force of the angle tower is balanced, and the angle tower is prevented from tilting towards the inner corner side when being subjected to the tension of the turning conductor. The bottom surfaces of multiple tower legs of the present invention are flush, which is convenient for processing and manufacturing and easy to ensure the processing accuracy. Correspondingly, the top surface of the foundation for erecting and fixing the angle tower of the present invention can be a plane parallel to the horizontal plane, which is easy to pour and ensure the pouring accuracy, thereby reducing the gap between the angle tower foundation and the tower legs and ensuring the erection accuracy of the angle tower; when erecting the angle tower, the gasket of the embedded bolt assembly on the angle tower foundation is completely attached to the bottom plate of the tower leg, ensuring uniform force on the gasket and nut on the embedded bolt assembly and improving the installation reliability of the angle tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is the overall structural schematic diagram of the present invention;

[0037] Figure 2 is Figure 1 the enlarged structural schematic diagram of part A in

[0038] Figure 3 is Figure 1 the enlarged structural schematic diagram of part C in

[0039] Figure 4 is the structural schematic diagram of the transition connection between the tower body and the tower head;

[0040] Figure 5 is Figure 4 the enlarged structural schematic diagram of part D in

[0041] Figure 6 is Figure 4 the enlarged structural schematic diagram of part E in

[0042] Reference numerals: 1 - tower body; 11 - main member; 12 - horizontal member; 13 - diagonal member; 2 - tower head; 21 - inner corner side column; 22 - outer corner side column; 23 - cross arm; 24 - ground wire support; 3 - tower leg; 4 - inner corner side adapter seat; 41 - first adapter plate; 42 - adapter seat plate; 43 - inner corner side upper shoe plate; 44 - inner corner side lower shoe plate; 5 - outer corner side adapter seat; 51 - second adapter plate; 53 - outer corner side upper shoe plate; 54 - outer corner side lower shoe plate; 9 - reference elevation. Detailed implementation manners

[0043] The present invention will be further described below with reference to the drawings and embodiments. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention.

[0044] As shown in the attached Figures 1-5As shown in the figure, a self-pre-biased tension and angle tower includes a tower body 1. A tower head 2 is provided at the upper end of the tower body 1, and a plurality of tower legs 3 are provided at the lower end of the tower body 1. The tower head 2 includes a tower pole, a cross arm 23 and a ground wire support 24. The cross arm 23 and the ground wire support 24 are both arranged on the tower pole, and the height position of the ground wire support 24 is higher than the height position of the cross arm 23. The tower pole includes an inner-angle-side column 21 arranged on its inner-angle side and an outer-angle-side column 22 arranged on its outer-angle side. The inner-angle-side column 21 and the outer-angle-side column 22 are arranged at intervals along the first horizontal direction. Both the inner-angle-side column 21 and the outer-angle-side column 22 are provided with two. The two inner-angle-side columns 21 are arranged at intervals along the second horizontal direction, and the two outer-angle-side columns 22 are arranged at intervals along the second horizontal direction. The second horizontal direction is perpendicular to the first horizontal direction. The lower ends of the inner-angle-side column 21 and the outer-angle-side column 22 are both fixedly connected to the upper end of the tower body 1. The projections of the cross arm 23 and the ground wire support 24 on the horizontal plane are both arranged along the first horizontal direction. The cross arm 23 is arranged to incline upward from the end far from the inner angle to the end close to the inner angle. The height position of the end of the ground wire support 24 close to the inner angle is higher than the height position of the end close to the outer angle. It also includes a reference plane perpendicular to both the horizontal plane and the axis of the second horizontal direction. A reference axis with its length direction arranged along the first horizontal direction is provided on the reference plane. The included angle between the projection of the inner-angle-side column 21 on the reference plane and the reference axis located on the inner-angle side of the tower head 2 is the inner-angle-side included angle α, and the included angle between the projection of the outer-angle-side column 22 on the reference plane and the reference axis located on the outer-angle side of the tower head 2 is the outer-angle-side included angle γ. The inner-angle-side included angle α is greater than the outer-angle-side included angle γ. The included angle between the cross arm 23 and the horizontal plane is (α - γ) / 2. The bottom surfaces of the plurality of tower legs 3 are all parallel to the horizontal plane. The length of the inner-angle-side column 21 is greater than the length of the outer-angle-side column 22, and the height position of the upper end of the inner-angle-side column 22 is higher than the height position of the outer-angle-side column 22.

[0045] The length directions of both the inner-angle-side column 21 and the outer-angle-side column 22 are arranged along the up and down direction. The first horizontal direction is arranged along Figure 1 the X direction in the figure. The reference plane is a plane passing through the X-axis and perpendicular to the horizontal plane. The inner-angle-side included angle α and the outer-angle-side included angle γ are as Figure 3 shown in the figure. After the turning conductors on the angle tower are erected, the side where the resultant force direction of the tension exerted by the turning conductors on the angle tower is located is the inner-angle side of the angle tower, and the side opposite to the resultant force direction of the tension exerted by the turning conductors on the angle tower is the outer-angle side. In the present invention, the "inner-angle side of the tower head 2" refers to the inner-angle side of the angle tower, and the "outer-angle side of the tower head 2" refers to the outer-angle side of the angle tower.

[0046] The inner corner side angle α between the inner corner side column 21 of the present invention and the reference axis is greater than the outer corner side angle γ between the outer corner side column 22 and the reference axis, realizing the pre - deflection of the entire tower head 2 towards the outer corner side, balancing the force of the angle tower, and avoiding the angle tower from tilting towards the inner corner side when being subjected to the tension of the turning conductor. The bottom surfaces of the multiple tower legs 3 of the present invention are all parallel to the horizontal plane, which is convenient for processing and manufacturing and easy to ensure the processing accuracy. Correspondingly, the top surface of the angle tower foundation of the present invention is a plane parallel to the horizontal plane, which is easy to pour and ensure the pouring accuracy, thereby reducing the gap between the angle tower foundation and the tower leg 3 and ensuring the erection accuracy of the angle tower; the gasket of the embedded bolt assembly on the angle tower foundation is completely attached to the bottom plate of the tower leg 3, ensuring uniform force on the gasket and nut of the embedded bolt assembly and improving the installation reliability of the angle tower.

[0047] The tower body 1 is used to support the entire tower structure and transfer the load of the conductor to the foundation. The tower body of the present invention can adopt the tower body structure in the prior art. Specifically, the tower body 1 includes main members 11 arranged along the up - down direction, and there are 4 main members 11. The 4 main members 11 are evenly distributed circumferentially along the central axis perpendicular to the horizontal plane. The main members 11 are inclined upward from outside to inside along the radial direction of the central axis; between two adjacent main members 11, there are horizontal members 12 and diagonal members 13. Two adjacent main members 11 are connected by the horizontal member 12 and the diagonal member 13, and the upper end surface of the horizontal member 12 is the upper end surface of the tower body 1. The main member 11 and the horizontal member 12, and the main member 11 and the diagonal member 13 can be welded or connected by bolts. The horizontal member 12 is parallel to the horizontal plane and its two ends are connected to the side walls of the main member 11. The diagonal member 13 is used to ensure the structural stability of the tower body 1. Generally, it has an angle with the horizontal plane. The two ends of the diagonal member 13 can both be connected to the main member 11, or one end can be connected to the main member 11 and the other end can be connected to the horizontal member 12.

[0048] The main member 11, the horizontal member 12, and the diagonal member 13 can be processed from steel such as channel steel and I - beam. In actual applications, they are mostly made of angle steel. The main member 11 is the main load - bearing structure of the entire tower body 1. Preferably, the main member 11 includes two angle steels arranged parallel and symmetrically with a gap. The two side walls of the two angle steels close to each other are parallel and the right - angle openings face away from each other; there is a transfer steel plate between the two angle steels and they are connected by the steel plate. This improves the stiffness and strength of the main member 11 and the tower body 1.

[0049] The tower head 2 is mainly used to support and fix the turning conductors, and the tower pole is used to connect the tower head 2 to the tower body 1 and transfer the weight of the entire tower head 2 to the tower body 1. Insulator strings for supporting and installing conductors are fixedly installed on the cross arm 23, and insulator strings for supporting the ground wire are provided on the ground wire support 24. The cross arm 23, the ground wire support 24 and the insulator strings all adopt existing structures, and the arrangement of the insulator strings on the cross arm 23 and the ground wire support 24 is adjusted in real time according to the on-site needs. Between the two inner corner side columns 21 on the tower pole, between the two outer corner side columns 22, and between the adjacent inner corner side column 21 and outer corner side column 22 can all be connected by cross bars and diagonal members. The inner corner side columns 21 and the outer corner side columns 22 on the tower pole are generally made of angle steel.

[0050] The tower poles of the tower body 1 and the tower head 2 can be directly connected or fixedly connected through an adapter. Generally, the inner corner side columns 21 and the outer corner side columns 22 on the tower head 2 can be connected to the tower body 1 by means of welding, bolt connection, etc. Preferably, it further includes an inner corner side adapter seat 4 and an outer corner side adapter seat 5; the inner corner side adapter seat 4 includes a first adapter plate 41, and a adapter seat plate 42 parallel to the horizontal plane, an inner corner side upper shoe plate 43 located above the adapter seat plate 42, and an inner corner side lower shoe plate 44 located below the adapter seat plate 42 are provided on the first adapter plate 41. The inner corner side upper shoe plate 43 and the inner corner side lower shoe plate 44 are both perpendicular to the first adapter plate 41. The tower body 1, the inner corner side column 21, the adapter seat plate 42, the inner corner side upper shoe plate 43, and the inner corner side lower shoe plate 44 are all arranged on the same side of the first adapter plate 41. The inner corner side upper shoe plate 43 is parallel to the inner corner side column 21 and is located on the side of the inner corner side column 21 away from the outer corner side column 22; the outer corner side adapter seat 5 includes a second adapter plate 51, and a adapter seat plate 42 parallel to the horizontal plane, an outer corner side upper shoe plate 53 located above the adapter seat plate 42, and an outer corner side lower shoe plate 54 located below the adapter seat plate 42 are provided on the second adapter plate 51. The outer corner side upper shoe plate 53 and the outer corner side lower shoe plate 54 are both perpendicular to the second adapter plate 51. The tower body 1, the outer corner side column 22, the adapter seat plate 42, the outer corner side upper shoe plate 53, and the outer corner side lower shoe plate 54 are all arranged on the same side of the second adapter plate 51. The outer corner side upper shoe plate 53 is parallel to the outer corner side column 22 and is located on the side of the outer corner side column 22 away from the inner corner side column 21; the tower body 1 is located below the adapter seat plate 42 and the top surface of the tower body 1 abuts against the adapter seat plate 42. The same main material 11 on the inner corner side of the tower body 1 abuts against and is bolted to both the inner corner side lower shoe plate 44 and the first adapter plate 41. The same main material 11 on the outer corner side of the tower body 1 abuts against and is bolted to the outer corner side lower shoe plate 54 and the first adapter plate 41; the tower head 2 is located above the adapter seat plate 42, and the lower end surfaces of both the inner corner side column 21 and the outer corner side column 22 abut against the adapter seat plate 42; the side wall of the same inner corner side column 21 is simultaneously in close contact with and bolted to both the first adapter plate 41 and the outer corner side upper shoe plate 53, and the side wall of the same outer corner side column 22 is simultaneously in close contact with and bolted to both the second adapter plate 51 and the outer corner side upper shoe plate 53. Bolting connection means connecting the planes of two components together through a bolt assembly.

[0051] The included angle between the inner-angle-side upper shoe plate 43 and the adapter seat plate 42 located on its inner-angle side is the same as the inner-angle-side included angle α, ensuring that the inner-angle-side upper shoe plate 43 is closely attached to and abuts against the inner-angle-side upright column 21. The inner-angle-side upper shoe plate 43 cooperates with the adapter seat plate 42 of the inner-angle-side adapter 4 to limit the inner-angle-side upright column 21 on the tower head 2 and the tower pole, preventing the upper end of the tower head 2 from deflecting towards the outer-angle side and the lower end of the tower head 2 from deflecting towards the inner-angle side when the steering conductor is not erected. The included angle between the outer-angle-side upper shoe plate 53 and the adapter seat plate 42 located on its outer-angle side is the same as the outer-angle-side included angle γ, ensuring that the outer-angle-side upper shoe plate 53 is closely attached to and abuts against the outer-angle-side upright column 22. The outer-angle-side upper shoe plate 53 cooperates with the adapter seat plate 42 of the outer-angle-side adapter 5 to limit the outer-angle-side upright column 22 on the tower head 2 and the tower pole, preventing the upper end of the tower head 2 from deflecting towards the inner-angle side and the lower end of the tower head 2 from deflecting towards the inner-angle side after the tower head 2 is pulled by the steering conductor. By providing the inner-angle-side adapter 4 and the outer-angle-side adapter 5, the inner-angle-side upright column 21 is transferred to the upper part of the tower body 1 to achieve the transitional connection between the tower body 1 and the tower head 2, preventing the tower head 2 from deflecting towards the inner-angle side or the outer-angle side and improving the connection reliability between the tower head 2 and the tower body 1.

[0052] The horizontal member 12 on the tower body 1 can only be in close contact with the bottom surface of the adapter seat plate 42, or can be bolted and connected on the basis of their close contact. As a further preference, the upper end surface of the horizontal member 22 is located below the adapter seat plate 42 and the two are bolted and connected, further improving the connection reliability between the inner-angle-side adapter 4, the outer-angle-side adapter 5 and the tower body 1.

[0053] The inner-angle-side lower shoe plate 44 and the outer-angle-side lower shoe plate 54 generally fit against the outer side wall of the main member 11. When the main member 11 includes two angle steels arranged in parallel and symmetrically with a gap, the two side walls of the two angle steels close to each other are parallel and the right-angle openings face away from each other, and a transition steel plate is provided between the two angle steels and they are connected by the steel plate, the inner-angle-side lower shoe plate 44 and the outer-angle-side lower shoe plate 54 are both located between the two angle steels on the main member 11 and are bolted and connected to the angle steels. The inner-angle-side lower shoe plate 44 and the outer-angle-side lower shoe plate 54 are both bolted and connected to the two angle steels on the main member 11, further improving the connection reliability between the inner-angle-side adapter 4, the outer-angle-side adapter 5 and the tower body 1.

[0054] Preferably, the adapter plate 42, the inner-angled upper shoe plate 43 and the inner-angled lower shoe plate 44 on the inner-angled adapter seat 4 are all welded to the first adapter plate 41, and the lower end of the inner-angled upper shoe plate 43 and the upper end of the inner-angled lower shoe plate 44 are both welded to the adapter plate 42 on the inner-angled adapter seat 4; the adapter plate 42, the outer-angled upper shoe plate 53 and the outer-angled lower shoe plate 54 on the outer-angled adapter seat 5 are all welded to the second adapter plate 51, and the lower end of the outer-angled upper shoe plate 53 and the upper end of the outer-angled lower shoe plate 54 are both welded to the adapter plate 42 on the outer-angled adapter seat 5. This improves the structural integrity of the inner-angled adapter seat 4 and the outer-angled adapter seat 5, and enhances the stiffness and strength of the inner-angled adapter seat 4 and the outer-angled adapter seat 5.

[0055] The tower leg 3 is used to connect the angle tower to the foundation, and the structure of the tower leg 3 adopts the tower leg in the prior art. The lengths of multiple tower legs 3 can be the same or different, which is specifically determined according to the geographical location where the tower body is erected. There are more than two tower legs 3. Specifically, to ensure the stability of the erection of the entire angle tower, the tower leg 3 is provided with 4 pieces, and the 4 tower legs 3 are evenly distributed on the lower end surface of the tower body 1.

[0056] The pre-bias method for forming any of the above self-pre-biased strain angle towers includes the following steps:

[0057] S1. Rotate the entire tower head 2 counterclockwise by a pre-bias angle θ with the axis of the second horizontal direction where the lower end of the outer-angled column 22 of the original strain angle tower is located as the rotation axis. During this process, while the lower end of the inner-angled column 21 of the original strain angle tower moves upward, it also moves inward along the first horizontal direction towards the inner-angled side;

[0058] The original strain angle tower is the strain angle tower before pre-bias; the inner-angled column 21 and the outer-angled column 22 on the tower head 2 of the original strain angle tower are of equal length and their lower ends are located on the same plane parallel to the horizontal plane, and the angles of the inner-angled included angle and the outer-angled included angle are the same;

[0059] S2. Extend the inner-angled column 21 formed in step S1 downward along its length direction and fixedly connect it to the upper end of the tower body 1 to obtain any of the above self-pre-biased strain angle towers.

[0060] Using this method to pre-bias the strain angle tower is more convenient for the cutting, processing and assembly of the inner-angled column 21, the outer-angled column 22, the horizontal member 12 and the inner-angled adapter seat 4. As shown in Figures 2-3 In the figure, the pre-bias angle θ of the tower head 2 in step S1 can be determined according to the pre-bias distance of the top of the tower head 2 along the first horizontal direction away from the inner-angled side. Specifically, the pre-bias angle of the tower head 2 is θ;

[0061] θ = arctanf / H;

[0062] H is the height value from the bottom end to the top end of the tower head 2 on the original strain angle tower; f is the pre-offset distance of the top end of the tower head 2 along the first horizontal direction away from the inner corner side direction.

[0063] After the completion of the step S1, the upward movement height h of the lower end of the inner corner side column 21 on the strain angle tower and the distance B1 by which the lower end of the inner corner side column 21 offsets inward in the first horizontal direction can both be calculated based on the pre-offset angle θ of the tower head 2 and the dimensions of the tower body. Specifically,

[0064] h = B×sinθ;

[0065] B1 = h×[tan(θ + β) - tan(θ / 2)];

[0066] B is the distance between the lower end of the center line of the inner corner side column 21 and the lower end of the center line of the outer corner side column 22 in the first horizontal direction; β is the angle between the center line of the inner corner side column 21 and the reference vertical plane 9 perpendicular to the first horizontal direction.

[0067] After the completion of the step S2, the length of the inner corner side column 22 on the strain angle tower formed is greater than the length of the outer corner side column 21. The pre-offset angle of the tower head 2 can be determined based on the horizontal displacement value at the top end of the on-site tower head 3. The length difference between the inner corner side column 21 and the outer corner side column 22 and the installation position of the lower end of the inner corner side column 21 in the second horizontal direction can be accurately calculated according to the pre-offset angle θ, which is convenient for the cutting, processing, and assembly of the inner corner side column 21, the outer corner side column 22, the horizontal member 12, and the inner corner side adapter 4, improves the processing accuracy of the angle tower, and further ensures the erection accuracy of the angle tower.

[0068] In the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "side surface", etc. is based on the orientation or positional relationship shown in the figure, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the figure are only for illustrative purposes and should not be construed as a limitation to the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0069] The embodiments of the present specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A self-prebiased strain angle tower, comprising a tower body (1), a tower head (2) is provided at the upper end of the tower body (1), and a plurality of tower legs (3) are provided at the lower end of the tower body (1); the tower head (2) includes a tower pole, a cross arm (23) and a ground wire support (24), the cross arm (23) and the ground wire support (24) are both arranged on the tower pole and the height position of the ground wire support (24) is higher than the height position of the cross arm (23); characterized in that: The tower pole includes an inner angle side column (21) arranged on its inner angle side and an outer angle side column (22) arranged on its outer angle side, the inner angle side column (21) and the outer angle side column (22) are arranged at intervals along the first horizontal direction; both the inner angle side column (21) and the outer angle side column (22) are provided with two, and the two inner angle side columns (21) are arranged at intervals along the second horizontal direction, and the two outer angle side columns (22) are arranged at intervals along the second horizontal direction; the second horizontal direction is perpendicular to the first horizontal direction; the lower ends of the inner angle side column (21) and the outer angle side column (22) are both fixedly connected to the upper end of the tower body (1); The projections of the cross arm (23) and the ground wire support (24) on the horizontal plane are both arranged along the first horizontal direction, the cross arm (23) is arranged to incline upward from the end far from the inner angle side to the end close to the inner angle side, and the height position of the end of the ground wire support (24) close to the inner angle side is higher than the height position of the end close to the outer angle side; It also includes a reference plane perpendicular to both the horizontal plane and the axis of the second horizontal direction, and a reference axis with a length direction arranged along the first horizontal direction is provided on the reference plane; the included angle between the projection of the inner angle side column (21) on the reference plane and the reference axis located on the inner angle side of the tower head (2) is the inner angle side included angle α, and the included angle between the projection of the outer angle side column (22) on the reference plane and the reference axis located on the outer angle side of the tower head (2) is the outer angle side included angle γ, and the inner angle side included angle α is greater than the outer angle side included angle γ; the included angle between the cross arm (23) and the horizontal plane is (α - γ) / 2; the bottom surfaces of the plurality of tower legs (3) are all parallel to the horizontal plane.

2. The self-pre-tensioned tension-angle tower according to claim 1, wherein: The tower body (1) includes main materials (11) with a length arranged in the up and down direction, 4 main materials (11) are provided, and the 4 main materials (11) are evenly distributed along the circumferential direction of the central axis perpendicular to the horizontal plane, and the main materials (11) are arranged to incline upward from the outside to the inside along the radial direction of the central axis; A horizontal member (12) and an inclined member (13) are provided between two adjacent main materials (11), and two adjacent main materials (11) are connected by the horizontal member (12) and the inclined member (13), and the upper end surface of the horizontal member (12) is the upper end surface of the tower body (1).

3. The self-pre-tensioning strain angle tower according to claim 2, characterized in that: The main material (11) includes two angle steels arranged in parallel, symmetrically and at intervals, and the two side walls of the two angle steels close to each other are parallel to each other and the right-angle openings face away from each other; a transfer steel plate is provided between the two angle steels and they are connected by the steel plate.

4. The self-pre-biased tension and angle tower according to any one of claims 2 or 3, characterized in that: It further includes an inner-angle side adapter seat (4) and an outer-angle side adapter seat (5); the inner-angle side adapter seat (4) includes a first adapter plate (41), on which there is an adapter seat plate (42) parallel to the horizontal plane, an inner-angle side upper shoe plate (43) located above the adapter seat plate (42), and an inner-angle side lower shoe plate (44) located below the adapter seat plate (42). Both the inner-angle side upper shoe plate (43) and the inner-angle side lower shoe plate (44) are perpendicular to the first adapter plate (41). The tower body (1), the inner-angle side upright column (21), the adapter seat plate (42), the inner-angle side upper shoe plate (43), and the inner-angle side lower shoe plate (44) are all arranged on the same side of the first adapter plate (41). The inner-angle side upper shoe plate (43) is parallel to the inner-angle side upright column (21) and is located on the side of the inner-angle side upright column (21) away from the outer-angle side upright column (22). The outer-angle side adapter seat (5) includes a second adapter plate (51), on which there is an adapter seat plate (42) parallel to the horizontal plane, an outer-angle side upper shoe plate (53) located above the adapter seat plate (42), and an outer-angle side lower shoe plate (54) located below the adapter seat plate (42). Both the outer-angle side upper shoe plate (53) and the outer-angle side lower shoe plate (54) are perpendicular to the second adapter plate (51). The tower body (1), the outer-angle side upright column (22), the adapter seat plate (42), the outer-angle side upper shoe plate (53), and the outer-angle side lower shoe plate (54) are all arranged on the same side of the second adapter plate (51). The outer-angle side upper shoe plate (53) is parallel to the outer-angle side upright column (22) and is located on the side of the outer-angle side upright column (22) away from the inner-angle side upright column (21). The tower body (1) is located below the adapter seat plate (42), and the top surface of the tower body (1) abuts against the adapter seat plate (42). The same main material (11) on the inner-angle side of the tower body (1) abuts against and is bolted to both the inner-angle side lower shoe plate (44) and the first adapter plate (41). The same main material (11) on the outer-angle side of the tower body (1) abuts against and is bolted to the outer-angle side lower shoe plate (54) and the first adapter plate (41). The tower head (2) is located above the adapter seat plate (42), and the lower end surfaces of both the inner-angle side upright column (21) and the outer-angle side upright column (22) abut against the adapter seat plate (42). The side wall of the same inner-angle side upright column (21) is simultaneously in close contact with and bolted to both the first adapter plate (41) and the outer-angle side upper shoe plate (53). The side wall of the same outer-angle side upright column (22) is simultaneously in close contact with and bolted to both the second adapter plate (51) and the outer-angle side upper shoe plate (53).

5. The self-pre-biased tension angle tower according to claim 4, characterized in that: The upper end surface of the horizontal member (22) is located below the adapter seat plate (42) and they are bolted together.

6. The self-prebiased tension angle tower according to claim 4, characterized in that: The main material (11) includes two angle steels arranged symmetrically at intervals and parallel to each other. The two side walls of the two angle steels that are close to each other are parallel to each other and the right-angle openings face away from each other. A transfer steel plate is provided between the two angle steels and they are connected by the steel plate. Both the inner-angle side lower shoe plate (44) and the outer-angle side lower shoe plate (54) are located between the two angle steels on the main material (11) and are bolted to the angle steels.

7. The self-pre-tensioned tension and angle tower according to claim 4, wherein: The adapter plate (42) on the inner-angle side adapter seat (4), the inner-angle side upper shoe plate (43) and the inner-angle side lower shoe plate (44) are all welded to the first transfer plate (41). The lower end of the inner-angle side upper shoe plate (43) and the upper end of the inner-angle side lower shoe plate (44) are both welded to the adapter plate (42) on the inner-angle side adapter seat (4). The adapter plate (42) on the outer-angle side adapter seat (5), the outer-angle side upper shoe plate (53) and the outer-angle side lower shoe plate (54) are all welded to the second transfer plate (51). The lower end of the outer-angle side upper shoe plate (53) and the upper end of the outer-angle side lower shoe plate (54) are both welded to the adapter plate (42) on the outer-angle side adapter seat (5).

8. The self-pre-biased tension angle tower according to claim 1, characterized in that: There are 4 tower legs (3), and the 4 tower legs (3) are evenly distributed on the lower end face of the tower body (1).

9. A pre-bias method for forming a self-pre-biased strain angle tower as described in any one of claims 1-8, characterized in that, It includes the following steps: S1. Taking the axis in the second horizontal direction where the lower end of the outer-angle side column (22) of the original strain angle tower is located as the rotation axis, rotate the entire tower head (2) counterclockwise by a pre-deviation angle θ. During this process, while the lower end of the inner-angle side column (21) of the original strain angle tower moves upward, it also moves inward along the first horizontal direction towards the inner-angle side. The original strain angle tower is the strain angle tower before pre-deviation. The lengths of the inner-angle side column (21) and the outer-angle side column (22) on the tower head (2) of the original strain angle tower are equal and the lower ends are located on the same plane parallel to the horizontal plane, and the angles of the inner-angle side included angle and the outer-angle side included angle are the same. S2. The inner-angle side column (21) formed in step S1 extends downward along its length direction and is connected to the upper end of the tower body (1) to obtain the self-pre-deviation strain angle tower according to any one of claims 1 - 8.

10. According to the pre-deviation method of the self-pre-deviation strain angle tower described in claim 9, it is characterized in that: The pre-deviation angle of the tower head (2) on the strain angle tower formed after step S1 is θ; θ = arctan(f / H); H is the height value from the bottom end to the top end of the tower head (2) on the original strain angle tower; f is the pre-deviation distance of the top end of the tower head (2) along the first horizontal direction away from the inner-angle side; The height that the lower end of the inner-angle side column (21) on the strain angle tower formed after step S1 moves upward is h, and the distance that the lower end of the inner-angle side column (21) on the strain angle tower formed after step S1 offsets inward along the first horizontal direction is B1; h = B×sinθ; B1 = h×[tan(θ + β) - tan(θ / 2)]; B is the distance between the lower end of the center line of the inner corner side column (21) and the lower end of the center line of the outer corner side column (22) in the first horizontal direction; β is the angle between the center line of the inner corner side column (21) and the reference vertical plane (9) perpendicular to the first horizontal direction.

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