CN110014242B - Welding process for tower foot of power transmission tower - Google Patents
Welding process for tower foot of power transmission tower Download PDFInfo
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- CN110014242B CN110014242B CN201910357386.4A CN201910357386A CN110014242B CN 110014242 B CN110014242 B CN 110014242B CN 201910357386 A CN201910357386 A CN 201910357386A CN 110014242 B CN110014242 B CN 110014242B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
- B23K31/022—Making profiled bars with soldered or welded seams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
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Abstract
The invention provides a power transmission tower foot welding process, which is matched with a mode that two welding seams at the symmetrical positions are staggered to carry out three welding operations, and further, the welding directions of the bottoming layer, the cover surface layer and the filling layer are opposite, and the welding equipment does not need to be reset, so that the welding efficiency is lower; the two welding seams at the symmetrical positions are respectively welded with the bottoming layers of the two welding seams, then the filling layers of the two welding seams are respectively welded, and finally the covering layers of the two welding seams are respectively welded, so that the interval time between the two symmetrical welding seams can be shortened, and the stress concentration is prevented; in addition, staggered welding is carried out between two welding seams, the interval time between each welding layer is longer, heat accumulation is prevented, and the welding quality is better; for four welding seams at the staggered position of the main rib plate, three welding processes are completed in symmetrical alternation, so that stress concentration and heat accumulation can be prevented.
Description
Technical Field
The invention relates to the field of power transmission towers, in particular to a welding process for tower feet of a power transmission tower.
Background
The power transmission iron tower is a high-rise structure, mainly adopts a steel structure, is very sensitive to inclination, deformation and welding strength, and has high requirements on uneven settlement of a foundation. During welding, cold joint or residual stress and deformation of welding occur, which may cause the power transmission iron tower to incline or even overturn. However, residual stress and deformation caused by temperature change after welding are problems to be solved urgently in the welding industry, so the problem of welding temperature field distribution is a hot spot concerned by domestic welding researchers.
In the existing welding process for the tower foot of the transmission tower, when a rib plate and a bottom plate are welded, for each welding seam, as shown in fig. 1, three welding passes are required, and the welding passes correspond to the welding of a bottoming layer, a filling layer and a cover surface layer respectively; as shown in fig. 2, the primer layer, the filling layer and the cover layer are welded in the same welding direction in the order of f1 to f 3; in addition, for the welding of the whole tower foot, the welding is generally carried out according to the sequence shown by s 1-s 8 in the attached figure 3, three times of welding of one welding seam are completed, and then the welding of the next welding seam is carried out. Therefore, when welding of a single welding seam is carried out, heat accumulation is easy to form due to the fact that the interval time between three layers of welding is short, and the welding effect is influenced; secondly, welding equipment needs to be reset after welding one welding layer, and then the next layer of welding is started from the beginning, so that the welding efficiency is low; in addition, the interval time between two symmetrical welding seams is long, and the heating welding is repeatedly carried out on the same position, so that stress concentration is easily caused, and the welding quality is influenced.
Disclosure of Invention
In view of the above, the invention provides a power transmission tower foot welding process with high welding efficiency.
The technical scheme of the invention is realized as follows: the invention provides a welding process of a tower foot of a power transmission tower, which comprises a base (A), a first main rib plate (B), two second main rib plates (C) and four auxiliary rib plates (D), wherein the first main rib plate (B) is vertically welded on the surface of the base (A), the other two second main rib plates (C) are arranged perpendicular to the base (A) and the first main rib plate (B) and are welded with the base (A), the two second main rib plates (C) are respectively arranged at two sides of the first main rib plate (B) and divide the surface of the base (A) into a first section (I), a second section (II), a third section (III) and a fourth section (IV), the two auxiliary rib plates (D) are respectively arranged in the first section (I) and are respectively welded with the base (A), the first main rib plate (B) or the second main rib plate (C) are respectively arranged in the second section (II) and the fourth section (IV) and are respectively welded with the base (A), and the second main rib plate (C) or the first main rib plate (B) is vertically arranged and welded, and each welding line is welded in three ways: welding a priming layer for the first time, welding a filling layer for the second time, and welding a cover layer for the third time; the welding direction of the bottom layer is the same as that of the cover surface layer, and the welding direction of the bottom layer is opposite to that of the filling layer.
On the basis of the technical scheme, preferably, for the welding seams between the base (A) and the rib plate, the welding seams between the first main rib plate (B) or the second main rib plate (C) and the four auxiliary rib plates (D), the two welding seams at the symmetrical positions of two sides of the same rib plate are firstly welded with the bottoming layers of the two welding seams respectively, then the filling layers of the two welding seams are welded respectively, and finally the cover surface layers of the two welding seams are welded respectively.
Further preferably, the welding directions of the bottom layers of the two welding seams at the symmetrical positions on the two sides of the same rib plate are opposite.
Further preferably, the welding direction of the priming layer, the filling layer and the cover layer is from left to right, from right to left, from top to bottom or from bottom to top.
On the basis of the technical scheme, preferably, two welding seams at symmetrical positions on two sides of the same rib plate are welded with the bottom layer of the first welding seam firstly and then the bottom layer of the second welding seam is welded; then, welding the filling layer of the first welding seam, and then welding the filling layer of the second welding seam; and finally, welding the cover surface layer of the first welding line, and then welding the cover surface layer of the second welding line.
On the basis of the technical scheme, preferably, for four welding seams formed at the joint of the first main rib plate (B) and the two second main rib plates (C), the bottom layers of two welding seams at symmetrical positions are respectively welded, and then the bottom layers of the other two welding seams at symmetrical positions are respectively welded; then, respectively welding the filling layers of two symmetrical position welding lines, and then respectively welding the filling layers of the other two symmetrical position welding lines; and finally, respectively welding the cover surface layers of the two symmetrical position welding lines, and then respectively welding the cover surface layers of the other two symmetrical position welding lines.
On the basis of the technical scheme, preferably, four symmetrical welding seams formed at the joint of a first main rib plate (B) and two second main rib plates (C) are taken as first symmetrical welding seams (1), two symmetrical welding seams positioned in a first section (I) and a second section (II) are respectively formed at the joint of a base (A) and the first main rib plate (B) and taken as second symmetrical welding seams (2), two symmetrical welding seams positioned in a third section (III) and a fourth section (IV) are respectively formed at the joint of the base (A) and the first main rib plates (B) and taken as third symmetrical welding seams (3), two symmetrical welding seams positioned in the first section (I) and the fourth section (IV) are respectively formed at the joint of the base (A) and the second main rib plates (C) and taken as fourth symmetrical welding seams (4), two symmetrical welding seams positioned in the second section (II) and the third section (III) are respectively formed at the joint of the base (A) and the second main rib plates (C) and taken as fifth symmetrical welding seams (5), two symmetrical welding seams which are formed at the joint of the slave rib plate (D) and the second main rib plate (C) and are positioned in the first section (I) are sixth symmetrical welding seams (6), two symmetrical welding seams which are formed at the joint of the slave rib plate (D) and the first main rib plate (B) and are positioned in the first section (I) are seventh symmetrical welding seams (7), two symmetrical welding seams which are formed at the joint of the slave rib plate (D) and the first main rib plate (B) and are positioned in the fourth section (IV) are eighth symmetrical welding seams (8), two symmetrical welding seams which are formed at the joint of the slave rib plate (D) and the second main rib plate (C) and are positioned in the second section (II) are ninth symmetrical welding seams (9), two symmetrical welding seams which are formed at the joint of the slave rib plate (D) and the base (A) and are positioned in the first section (I) are tenth symmetrical welding seams (10), and two symmetrical welding seams which are formed at the joint of the other slave rib plate (D) and the base (A) and are positioned in the first section (I) are eleventh symmetrical welding seams (11), form two symmetry welds that are located fourth Interval (IV) from gusset (D) and base (A) handing-over department and be twelfth symmetry weld (12), form two symmetry welds that are located third interval (III) from gusset (D) and base (A) handing-over department and be thirteenth symmetry weld (13), wherein, the welding sequence is: the welding method comprises the following steps of sequentially welding a first symmetrical welding seam (1), a second symmetrical welding seam (2), a third symmetrical welding seam (3), a fourth symmetrical welding seam (4), a fifth symmetrical welding seam (5), a sixth symmetrical welding seam (6), a seventh symmetrical welding seam (7), an eighth symmetrical welding seam (8), a ninth symmetrical welding seam (9), a tenth symmetrical welding seam (10), an eleventh symmetrical welding seam (11), a twelfth symmetrical welding seam (12) and a thirteenth symmetrical welding seam (13).
Compared with the prior art, the welding process of the tower foot of the power transmission tower has the following beneficial effects:
(1) the mode of performing three welding operations by matching the two welding lines at the symmetrical positions in a staggered manner is further adopted, the welding directions of the bottoming layer, the cover surface layer and the filling layer are opposite, and the welding equipment does not need to reset, so that the welding efficiency is higher;
(2) the two welding seams at the symmetrical positions are respectively welded with the bottoming layers of the two welding seams, then the filling layers of the two welding seams are respectively welded, and finally the covering layers of the two welding seams are respectively welded, so that the interval time between the two symmetrical welding seams can be shortened, and the stress concentration is prevented; in addition, staggered welding is carried out between two welding seams, the interval time between each welding layer is longer, heat accumulation is prevented, and the welding quality is better;
(3) for four welding seams at the staggered position of the main rib plate, three welding processes are completed in symmetrical alternation, so that stress concentration and heat accumulation can be prevented;
(4) through adjusting the welding order to each welding seam, from the centre to the edge, symmetry or rotatory welding in turn can in time dispel the heat, prevent the heat accumulation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a conventional three-pass welding structure of a weld;
FIG. 2 is a schematic view of a conventional welding seam showing three welding directions;
FIG. 3 is a schematic diagram of a conventional three-pass welding sequence of a weld;
FIG. 4 is a tower foot structure diagram of the power transmission tower of the present invention;
FIG. 5 is a schematic view of a welding sequence of tower legs of the transmission tower of the present invention;
fig. 6 is a schematic diagram of a three-pass welding sequence of the welding seam of the tower foot of the power transmission tower.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 4 to 5, the tower foot of the invention comprises a base a, a first main rib plate B, two second main rib plates C and four secondary rib plates D, wherein the first main rib plate B is vertically welded on the surface of the base a, the other two second main rib plates C are arranged perpendicular to and welded with the base a and the first main rib plate B, the two secondary rib plates C are respectively arranged at two sides of the first main rib plate B and divide the surface of the base a into a first section i, a second section ii, a third section iii and a fourth section iv, wherein the two secondary rib plates D are respectively arranged in the first section i and are respectively vertically arranged and welded with the base a, the first main rib plate B or the second main rib plate C, and the other two secondary rib plates D are respectively arranged in the second section ii and the fourth section iv and are respectively vertically arranged and welded with the base a, and the second main rib plate C or the first main rib plate B.
The welding process comprises the following steps:
firstly, four welding seams formed at the joint of the first main rib plate B and the two second main rib plates C are welded. Four symmetrical welding seams formed at the joint of the first main rib plate B and the two second main rib plates C are taken as first symmetrical welding seams 1, for the welding of the four first symmetrical welding seams 1, the bottom layers of two symmetrical position welding seams are respectively welded, and then the bottom layers of the other two symmetrical position welding seams are respectively welded; then, respectively welding the filling layers of two symmetrical position welding lines, and then respectively welding the filling layers of the other two symmetrical position welding lines; and finally, respectively welding the cover surface layers of the two symmetrical position welding lines, and then respectively welding the cover surface layers of the other two symmetrical position welding lines.
And then, welding the base A with one first main rib plate B and two second main rib plates is completed. Two symmetrical welding seams which are positioned in a first interval I and a second interval II are respectively formed at the joint of a base A and a first main rib plate B and are taken as second symmetrical welding seams 2, two symmetrical welding seams which are positioned in a third interval III and a fourth interval IV are respectively formed at the joint of the base A and the first main rib plate B and are taken as third symmetrical welding seams 3, two symmetrical welding seams which are positioned in the first interval I and the fourth interval IV are respectively formed at the joint of the base A and a second main rib plate C and are taken as fourth symmetrical welding seams 4, two symmetrical welding seams which are positioned in the second interval II and the third interval III are respectively formed at the joint of the base A and the second main rib plate C and are taken as fifth symmetrical welding seams 5, wherein the welding sequence is as follows: and sequentially welding from the second symmetrical welding seam 2, the third symmetrical welding seam 3, the fourth symmetrical welding seam 4 to the fifth symmetrical welding seam 5. For the welding of each symmetrical welding seam, the bottoming layers of the two welding seams are respectively welded, then the filling layers of the two welding seams are respectively welded, and finally the covering layers of the two welding seams are respectively welded. Specifically, the welding direction of the bottom layer and the cover surface layer is the same, and the welding direction of the bottom layer and the filling layer is opposite. The welding direction of the bottom layer, the filling layer and the cover surface layer is from left to right, from right to left, from top to bottom or from bottom to top. Specifically, as shown in fig. 6, according to the sequence of d 1-d 6, two welding seams located at symmetrical positions on two sides of the same rib plate are firstly welded with the bottom layer of the first welding seam in the forward direction, and then welded with the bottom layer of the second welding seam in the reverse direction; then, welding the filling layer of the first welding seam in a forward direction, and then welding the filling layer of the second welding seam in a reverse direction; and finally, welding the cover surface layer of the first welding line in the forward direction, and then welding the cover surface layer of the second welding line in the reverse direction.
And then, completing the vertical weld joint welding between the four secondary rib plates D and the main rib plate. Two symmetrical welding seams which are positioned in a first interval I and formed at the joint of the slave rib plate D and the second main rib plate C are used as sixth symmetrical welding seams 6, two symmetrical welding seams which are positioned in the first interval I and formed at the joint of the slave rib plate D and the first main rib plate B are used as seventh symmetrical welding seams 7, two symmetrical welding seams which are positioned in a fourth interval IV and formed at the joint of the slave rib plate D and the first main rib plate B are used as eighth symmetrical welding seams 8, two symmetrical welding seams which are positioned in a second interval II and formed at the joint of the slave rib plate D and the second main rib plate C are used as ninth symmetrical welding seams 9, wherein the welding sequence is as follows: and sequentially welding from a sixth symmetrical welding seam 6, a seventh symmetrical welding seam 7, an eighth symmetrical welding seam 8 to a ninth symmetrical welding seam 9. For the welding of each symmetrical welding seam, the bottoming layers of the two welding seams are respectively welded, then the filling layers of the two welding seams are respectively welded, and finally the covering layers of the two welding seams are respectively welded. Specifically, the welding direction of the bottom layer and the cover surface layer is the same, and the welding direction of the bottom layer and the filling layer is opposite. The welding direction of the bottom layer, the filling layer and the cover surface layer is from left to right, from right to left, from top to bottom or from bottom to top. Specifically, as shown in fig. 6, according to the sequence of d 1-d 6, two welding seams located at symmetrical positions on two sides of the same rib plate are firstly welded with the bottom layer of the first welding seam in the forward direction, and then welded with the bottom layer of the second welding seam in the reverse direction; then, welding the filling layer of the first welding seam in a forward direction, and then welding the filling layer of the second welding seam in a reverse direction; and finally, welding the cover surface layer of the first welding line in the forward direction, and then welding the cover surface layer of the second welding line in the reverse direction.
And finally, completing the horizontal welding seam welding between the four secondary rib plates D and the base A. Form two symmetrical welds that are located first interval I from gusset D and base A handing-over department and be tenth symmetrical weld 10, another forms two symmetrical welds that are located first interval I from gusset D and base A handing-over department and be eleventh symmetrical weld 11, form two symmetrical welds that are located fourth interval IV from gusset D and base A handing-over department and be twelfth symmetrical weld 12, form two symmetrical welds that are located third interval III from gusset D and base A handing-over department and be thirteenth symmetrical weld 13, wherein, the welding order is: the welding is carried out from a tenth symmetrical welding seam 10, an eleventh symmetrical welding seam 11, a twelfth symmetrical welding seam 12 to a thirteenth symmetrical welding seam 13 in sequence. For the welding of each symmetrical welding seam, the bottoming layers of the two welding seams are respectively welded, then the filling layers of the two welding seams are respectively welded, and finally the covering layers of the two welding seams are respectively welded. Specifically, the welding direction of the bottom layer and the cover surface layer is the same, and the welding direction of the bottom layer and the filling layer is opposite. The welding direction of the bottom layer, the filling layer and the cover surface layer is from left to right, from right to left, from top to bottom or from bottom to top. Specifically, as shown in fig. 6, according to the sequence of d 1-d 6, two welding seams located at symmetrical positions on two sides of the same rib plate are firstly welded with the bottom layer of the first welding seam in the forward direction, and then welded with the bottom layer of the second welding seam in the reverse direction; then, welding the filling layer of the first welding seam in a forward direction, and then welding the filling layer of the second welding seam in a reverse direction; and finally, welding the cover surface layer of the first welding line in the forward direction, and then welding the cover surface layer of the second welding line in the reverse direction.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. A tower foot welding process of a power transmission tower comprises a base (A), a first main rib plate (B), two second main rib plates (C) and four auxiliary rib plates (D), wherein the first main rib plate (B) is vertically welded on the surface of the base (A), the other two second main rib plates (C) are vertically arranged on the two sides of the first main rib plate (B) and divide the surface of the base (A) into a first section (I), a second section (II), a third section (III) and a fourth section (IV), the two auxiliary rib plates (D) are respectively arranged in the first section (I) and are respectively vertically arranged with the base (A), the first main rib plate (B) or the second main rib plate (C) and are welded, the other two auxiliary rib plates (D) are respectively arranged in the second section (II) and the fourth section (IV) and are respectively arranged with the base (A), and the second main rib plate (C) or the first main rib plate (B) is vertically arranged and welded, and is characterized in that: each welding seam is divided into three welding courses: welding a priming layer for the first time, welding a filling layer for the second time, and welding a cover layer for the third time; the welding direction of the bottom layer and the cover surface layer is the same, and the welding direction of the bottom layer and the filling layer is opposite;
for welding seams between the base (A) and the rib plates, and welding seams between the first main rib plate (B) or the second main rib plate (C) and the four auxiliary rib plates (D), two welding seams positioned at symmetrical positions on two sides of the same rib plate are respectively welded with a bottoming layer of the two welding seams, then filling layers of the two welding seams are respectively welded, and finally covering layers of the two welding seams are respectively welded;
two welding seams are symmetrically arranged at two sides of the same rib plate, and the welding directions of the bottom layers are opposite;
four symmetrical welding seams formed at the joint of a first main rib plate (B) and two second main rib plates (C) are taken as first symmetrical welding seams (1), two symmetrical welding seams positioned in a first interval (I) and a second interval (II) are respectively formed at the joint of a base (A) and the first main rib plate (B) and are taken as second symmetrical welding seams (2), two symmetrical welding seams positioned in a third interval (III) and a fourth Interval (IV) are respectively formed at the joint of the base (A) and the first main rib plate (B) and are taken as third symmetrical welding seams (3), two symmetrical welding seams positioned in the first interval (I) and the fourth Interval (IV) are respectively formed at the joint of the base (A) and the second main rib plates (C) and are taken as fourth symmetrical welding seams (4), two symmetrical welding seams positioned in the second interval (II) and the third interval (III) are respectively formed at the joint of the base (A) and the second main rib plates (C) and are taken as fifth symmetrical welding seams (5), two symmetrical welding seams which are formed at the joint of the slave rib plate (D) and the second main rib plate (C) and are positioned in the first section (I) are sixth symmetrical welding seams (6), two symmetrical welding seams which are formed at the joint of the slave rib plate (D) and the first main rib plate (B) and are positioned in the first section (I) are seventh symmetrical welding seams (7), two symmetrical welding seams which are formed at the joint of the slave rib plate (D) and the first main rib plate (B) and are positioned in the fourth section (IV) are eighth symmetrical welding seams (8), two symmetrical welding seams which are formed at the joint of the slave rib plate (D) and the second main rib plate (C) and are positioned in the second section (II) are ninth symmetrical welding seams (9), two symmetrical welding seams which are formed at the joint of the slave rib plate (D) and the base (A) and are positioned in the first section (I) are tenth symmetrical welding seams (10), and two symmetrical welding seams which are formed at the joint of the other slave rib plate (D) and the base (A) and are positioned in the first section (I) are eleventh symmetrical welding seams (11), form two symmetry welds that are located fourth Interval (IV) from gusset (D) and base (A) handing-over department and be twelfth symmetry weld (12), form two symmetry welds that are located third interval (III) from gusset (D) and base (A) handing-over department and be thirteenth symmetry weld (13), wherein, the welding sequence is: the welding method comprises the following steps of sequentially welding a first symmetrical welding seam (1), a second symmetrical welding seam (2), a third symmetrical welding seam (3), a fourth symmetrical welding seam (4), a fifth symmetrical welding seam (5), a sixth symmetrical welding seam (6), a seventh symmetrical welding seam (7), an eighth symmetrical welding seam (8), a ninth symmetrical welding seam (9), a tenth symmetrical welding seam (10), an eleventh symmetrical welding seam (11), a twelfth symmetrical welding seam (12) and a thirteenth symmetrical welding seam (13).
2. The tower foot welding process of the power transmission tower according to claim 1, characterized in that: the welding direction of the bottom layer, the filling layer and the cover surface layer is from left to right, from right to left, from top to bottom or from bottom to top.
3. The tower foot welding process of the power transmission tower according to claim 1, characterized in that: two welding seams positioned at symmetrical positions on two sides of the same rib plate are welded with the bottom layer of the first welding seam firstly and then the bottom layer of the second welding seam is welded; then, welding the filling layer of the first welding seam, and then welding the filling layer of the second welding seam; and finally, welding the cover surface layer of the first welding line, and then welding the cover surface layer of the second welding line.
4. The tower foot welding process of the power transmission tower according to claim 1, characterized in that: for four welding seams formed at the joint of the first main rib plate (B) and the two second main rib plates (C), welding the priming layers of two welding seams at symmetrical positions respectively, and then welding the priming layers of the other two welding seams at symmetrical positions respectively; then, respectively welding the filling layers of two symmetrical position welding lines, and then respectively welding the filling layers of the other two symmetrical position welding lines; and finally, respectively welding the cover surface layers of the two symmetrical position welding lines, and then respectively welding the cover surface layers of the other two symmetrical position welding lines.
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| CN110842494A (en) * | 2019-11-21 | 2020-02-28 | 中国科学院上海应用物理研究所 | Manufacturing method of molten salt corrosion resistant nickel-based superalloy chain |
| CN112589303B (en) * | 2020-11-25 | 2022-08-19 | 上海新时达机器人有限公司 | Tower foot welding method and device for tower foot of power transmission tower and communication tower |
| CN113283083B (en) * | 2021-05-27 | 2022-06-03 | 中电建武汉铁塔有限公司 | Transmission line iron tower simulation trial assembly method and system |
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