Single-limb tower general assembly jig frame applied to irregular polygonal power transmission twin-limb tower connected by inner flanges

Abstract

The utility model discloses a single-limb tower general splicing jig frame of an irregular polygonal power transmission twin-limb tower applied to inner flange connection, which adopts a symmetrical structure and comprises a cross beam, a plurality of vertical supporting plates are arranged at the top of the cross beam, inclined struts are symmetrically arranged on the two sides of the vertical supporting plates, and the bottoms of the inclined struts are connected with the cross beam. A plurality of lateral supporting plates are arranged on the opposite faces of the inclined struts on the two sides at intervals respectively, the lateral supporting plates are perpendicular to the inclined struts, the vertical curve of the single-limb tower is achieved by arranging and adjusting the elevation of the vertical supporting plates, and the lateral supporting plates are arranged according to the slopes of different sections of the linear twisted wall plates. The jig frame disclosed by the utility model can realize longitudinal linear continuous total splicing manufacturing of the single-limb tower, and improves the manufacturing efficiency and precision of the sections of the single-limb tower; the jig frame is designed with the outer side wall plate of the single-limb tower as the bottom side, the jig frame structure is simplified, and the manufacturing difficulty is lowered; the jig frame controls the longitudinal linetype of the single-limb tower by adjusting the elevation of the supporting plate, the linetype control difficulty and the linetype measurement difficulty of single-limb tower manufacturing are reduced, and the linetype precision of single-limb tower manufacturing is improved.

Description

Technical Field

[0001] The utility model relates to a single-limb tower assembly frame, in particular to a single-limb tower assembly frame applied to an irregular polygonal power transmission double-limb tower with inner flange connection. Background Art

[0002] Electricity towers can be divided into angle steel towers and steel tubular towers based on their structural form. Currently, most steel tubular towers, both domestically and internationally, utilize external flange connections or plug-in connections. Their appearance is generally a single-tower structure with regular 16-, 32-, or 64-gons. These uniform shapes make them relatively easy to manufacture. The special towers used in the Penang 275kV cross-sea transmission line project in Malaysia utilize an irregular polygonal twin-tower structure with internal flange connections. The segments are connected using internal flanges, and the cross-section is composed of irregular polygons that continuously change along the tower's elevation. The entire tower is a twin-tower structure. The overall shape is elegant, resembling a betel nut, hence the name "Betel Nut Tower," but manufacturing is extremely challenging. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to propose a single-limb tower assembly frame for an irregular polygonal double-limb transmission tower with an inner flange connection, so as to ensure the overall linear and shape requirements of the double-limb tower.

[0004] Technical solution: The single-leg tower assembly frame of the utility model adopts a symmetrical structure, including a crossbeam, a plurality of vertical support plates are provided on the top of the crossbeam, diagonal supports are symmetrically provided on both sides of the vertical support plates, the bottom of the diagonal support is connected to the crossbeam, and a plurality of lateral support plates are respectively provided on the opposite sides of the diagonal supports. The lateral support plates are arranged perpendicular to the diagonal supports. The vertical curve of the single-leg tower is achieved by setting and adjusting the elevation of the vertical support plates, and the lateral support plates are set according to the slope of different sections of the linear twisted wall panels.

[0005] The overall outline of the support plate of the single-limb tower assembly frame is 2 mm larger than the outline of the tower outer surface, which provides a certain adjustment margin when assembling the assembly segments and is easy to assemble.

[0006] The linear deviation of the single-limb tower assembly frame is no more than 3 mm, and the ground sample line is released as the longitudinal reference line for subsequent segment assembly.

[0007] A supporting column is connected between the bottom of the diagonal support and the crossbeam.

[0008] A platform is set up on the top of the diagonal support, and a skirting board is respectively provided on one side of the two platforms close to each other, and a guardrail is provided on the other side. A supporting column is connected between the bottom of the platform and the crossbeam.

[0009] The manufacturing jig for the linear twisted wall panel includes a ground platform and multiple integral support plates. The linear twisted wall panel is placed on the surfaces of the multiple integral support plates. The slope of the support plates in each cross-section of the integral support plates is consistent with that of the linear twisted wall panel. The integral support plates include multiple support plates, and the bottom of each support plate is provided with a ground platform.

[0010] The linear error of the manufacturing jig for the linear twisted wall panel does not exceed 2 mm.

[0011] The linear twisted wall panel and the jig are fixed by U-shaped clamps.

[0012] The thickness of the integral support plates is not less than 16 mm, and the slope of the support plates in each cross-section needs to be consistent with that of the linear twisted wall panel.

[0013] The linear twisted wall panel is formed by a hot straightening process. The hot straightening temperature does not exceed 650 °C, and the hot straightening should be carried out step by step until the wall panel is 100% closely attached to the jig.

[0014] Beneficial effects: The jig of the present utility model can realize the continuous overall assembly production of the longitudinal linear shape of a single-leg tower, improving the manufacturing efficiency and accuracy of single-leg tower segments; the jig is designed with the outer side wall panel of the single-leg tower as the bottom side, simplifying the jig structure and manufacturing difficulty; the jig controls the longitudinal linear shape of the single-leg tower by adjusting the elevation of the support plates, reducing the difficulty of controlling the linear shape and the difficulty of linear measurement during the production of the single-leg tower, and improving the linear shape accuracy of the single-leg tower production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the front view of the overall assembly jig for the single-leg tower of the present utility model;

[0016] Figure 2 It is the schematic diagram of the overall assembly jig for the single-leg tower of the present utility model;

[0017] Figure 3 It is the schematic diagram of the linear twisted wall panel of the present utility model;

[0018] Figure 4 is Figure 3 the special jig for manufacturing the linear twisted wall panel;

[0019] Figure 5 is Figure 4 the sectional view of the support plate of the special jig for manufacturing the linear twisted wall panel; where, (a) is the sectional view along A-A; (b) is the sectional view along B-B; (c) is the sectional view along C-C; (d) is the sectional view along D-D; (e) is the sectional view along E-E. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be further described below in conjunction with the drawings.

[0021] As Figure 1 andFigure 2 As shown in the figure, the single-leg tower general assembly jig for an irregular polygon transmission double-leg tower applied to inner flange connection of the utility model adopts a symmetrical structure, including a cross beam 1. There are multiple vertical support plates 3 arranged on the top of the cross beam 1. Diagonal braces 4 are symmetrically arranged on both sides of the vertical support plates 3. A support column 5 is connected between the bottom of the diagonal brace and the cross beam 1. Multiple lateral support plates 2 are respectively arranged at intervals on the opposite sides of the two diagonal braces 4, and the lateral support plates 2 are arranged perpendicular to the diagonal braces 4. A platform is erected on the top of the diagonal brace 4. Kick plates are respectively arranged on one side where the two platforms are close to each other, and guardrails are arranged on the other side. A support column 5 is also connected between the bottom of the platform and the cross beam 1.

[0022] The vertical curve of the single-leg tower is realized by setting and adjusting the elevation of the vertical support plate 3. According to the structural form of the single-leg tower, the outer wall plate is used as the bottom edge for assembling segments. The jig cross beams are arranged at sections with relatively large stiffness such as diaphragms or anchor plates of the segments, and the cross beam spacing is one every 3 - 4m. Vertical support plates are arranged at the center of the jig cross beams, and the elevation of the vertical support plates is set according to the elevation value h1 of the outer skin of the wall plate from the zero point at each section.

[0023] Among them, the zero point determination method is: rotate each round of general assembly segments to be horizontal at both ends, and set the lowest point in the middle as the zero point, and set the height of this point from the top surface of the jig as 100mm (not less than 100mm is appropriate). Then the height H of each support plate = 100 + h1. After the support plate height is determined, cut and manufacture the vertical support plates according to the drawings. The vertical support plates are symmetrically arranged on site according to the longitudinal reference line of the jig, and the spacing of the vertical support plates is 400 - 600mm, and there are no less than 3 vertical support plates at each cross beam. Finally, use a level to measure the elevation of the vertical support plates, and trim the places with elevation errors to be in place.

[0024] The lateral support plates 2 are set according to the slopes of different sections of the linearly twisted wall plate as shown in Figure 3 the figure, ensuring that the elevation of the jig support plates at different sections conforms to the outer surface contour of the single-leg tower. Take the points at both ends of the linearly twisted wall plate. Through lofting, the theoretical X and Y coordinate values of the two points can be known. On site, after using a total station to release the high and low points and pulling out a powder line, then install the lateral support plates according to the line. The spacing of the lateral support plates is 400 - 600mm, and there are no less than 2 lateral support plates at each cross beam. The overall contour of the jig support plates is 2mm larger than the outer surface contour of the steel tower, and there is a certain adjustment margin during the assembly of the general assembly segments and it is convenient for assembly.

[0025] Since the cross section of the double-leg tower is an irregular polygon cross section that is constantly changing, and the included angle between the wall plate and the horizontal is constantly changing, resulting in linear distortion of the wall plate in the segment, it is necessary to separately divide and manufacture the wall plate with linear distortion. The slopes of the upper and lower sections of the linearly twisted wall plate are different, resulting in distortion of the wall plate. According to the actual BIM model, the slopes of each section of the wall plate in the elevation direction change linearly, as shown in Figure 3 the figure.

[0026] The linear twisted wall panel is manufactured using a jig as shown Figure 4 . The jig includes a ground platform 326 and multiple integral support plates. The ground platform 326 is fixed to the foundation using expansion bolts. The linear twisted wall panel is placed on the surfaces of the multiple integral support plates. The thickness of the integral support plates is not less than 16 mm, and the slope of the support plates in each cross-section should be consistent with that of the linear twisted wall panel. The integral support plates include the first support plate 321, the second support plate 322, the third support plate 323, the fourth support plate 324, and the fifth support plate 325. A ground platform 326 is provided at the bottom of each support plate. The sectional views of the first support plate 321, the second support plate 322, the third support plate 323, the fourth support plate 324, and the fifth support plate 325 are respectively as shown Figure 5 (a) to (e).

[0027] The manufacturing process of the linear twisted wall panel includes the following steps:

[0028] 1) First, assemble the above-mentioned jig. The jig is composed of a ground platform and integral support plates. The entire jig should have a certain rigidity. The ground platform is fixed to the foundation using expansion bolts. The thickness of the integral support plates is 20 mm, and the slope of the support plates in each cross-section should be consistent with that of the linear twisted wall panel. Inspect the jig and control the linear error not to exceed 2 mm;

[0029] 2) Place the linear twisted wall panel on the jig, fix the wall panel to the jig using U-shaped clamps, and form it using the hot straightening process. The hot straightening temperature does not exceed 650 °C. The hot straightening should be carried out step by step until the wall panel is 100% closely attached to the jig;

[0030] 3) During the hot straightening process, use a level to measure the elevation of each characteristic point synchronously and monitor the wall panel line type until the hot straightening is qualified.

Claims

1. A single-limb tower assembly frame for an irregular polygonal double-limb transmission tower with inner flange connection, characterized in that: The single-leg tower assembly frame adopts a symmetrical structure, including a crossbeam, a plurality of vertical support plates are provided on the top of the crossbeam, diagonal supports are symmetrically provided on both sides of the vertical support plates, the bottom of the diagonal supports are connected to the crossbeam, and a plurality of lateral support plates are respectively provided on the opposite sides of the diagonal supports at intervals. The lateral support plates are arranged perpendicular to the diagonal supports. The vertical curve of the single-leg tower is achieved by setting and adjusting the elevation of the vertical support plates, and the lateral support plates are set according to the slope of different sections of the linear twisted wall panels.

2. The single-limb tower assembly frame for an irregular polygonal double-limb power transmission tower with inner flange connection according to claim 1, characterized in that: The overall outline of the support plate of the single-limb tower assembly frame is larger than the outline of the tower outer surface.

3. A single-limb tower assembly frame for an irregular polygonal double-limb power transmission tower with inner flange connection according to claim 1 or 2, characterized in that: The linear deviation of the single-limb tower overall assembly frame is no more than 3mm.

4. The single-limb tower assembly frame for an irregular polygonal double-limb power transmission tower with inner flange connection according to claim 1, characterized in that: A supporting column is connected between the bottom of the diagonal support and the crossbeam.

5. The single-limb tower assembly frame for an irregular polygonal double-limb power transmission tower with inner flange connection according to claim 1, characterized in that: A platform is set up on the top of the diagonal support, and a skirting board is respectively provided on one side of the two platforms close to each other, and a guardrail is provided on the other side. A supporting column is connected between the bottom of the platform and the crossbeam.

6. The single-limb tower assembly frame for an irregular polygonal double-limb power transmission tower with inner flange connection according to claim 1, characterized in that: The manufacturing frame of the linear twisted wall panel includes a ground platform and multiple integral support plates. The linear twisted wall panels are placed on the surfaces of the multiple integral support plates. The support plate slope on each section of the integral support plate is consistent with that of the linear twisted wall panel. The integral support plate includes multiple support plates, and a ground platform is provided at the bottom of each support plate.

7. The single-limb tower assembly frame for an irregular polygonal double-limb power transmission tower with inner flange connection according to claim 6, characterized in that: The linear error of the manufacturing frame of the linear twisted siding does not exceed 2mm.

8. The single-limb tower assembly frame for an irregular polygonal double-limb power transmission tower with inner flange connection according to claim 6, characterized in that: The linear twisted wall plate and the tire frame are fixed with U-shaped clips.

9. The single-limb tower assembly frame for an irregular polygonal double-limb power transmission tower with inner flange connection according to claim 6, characterized in that: The thickness of the integral support plate is not less than 16 mm.

10. The single-limb tower assembly frame for an irregular polygonal double-limb power transmission tower with inner flange connection according to claim 6, characterized in that: The linear twisted wall panel is formed by adopting a heat straightening process.

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