A vertically arranged 500 kV single circuit wine bottle tower

Abstract

The present application relates to a kind of 500 kilovolt single loop wine bottle tower vertically arranged, including tower body, a pair of outwardly extending curved arm is fixed above the tower body, vertical edge column is fixed in each curved arm top, crossbeam is fixed between the edge column and forms tower window, V-type insulator string is fixed in the tower window, each edge column top end is fixed with ground wire support, the crossbeam has three, from top to bottom respectively with edge column forms first tower window, second tower window and third tower window, adopts V-type insulator string to fix wire, limits insulator string wind deviation, further narrows the range of corridor, improve lightning protection angle of tower, improve line lightning protection performance, by changing tower head arrangement mode, narrows the horizontal distance of wire, reduces the width of transmission line corridor, saves corridor resource.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of iron tower, and particularly relates to a vertically arranged 500-kilovolt single-loop wine bottle tower. BACKGROUND

[0002] The power grid is the energy artery of social and economic construction and urban development. With the development of social economy, more power grid support is inevitably needed. Therefore, how to save the transmission line corridor and efficiently utilize land resources has become an eternal research topic. The transmission line corridor refers to the strip-shaped area below the line under the edge conductor along the high-voltage overhead power line, in which the public is allowed to enter or engage in basic agricultural and other limited production activities. The protection angle of the tower is the included angle between the outside connecting line of the overhead ground wire and the edge conductor and the vertical line of the overhead ground wire.

[0003] Generally, the single-loop tower of the overhead transmission line is arranged horizontally or triangularly. The width of the conventional 500-kilovolt single-loop transmission line corridor is about 60-100 m, which occupies a large area of land and is poor in land resource development and utilization. In addition, the protection angle of the single-loop tower of the general overhead transmission line is generally greater than 0 degrees, and the lightning protection performance is poor. SUMMARY

[0004] In order to solve the problems of the wide transmission line corridor of the existing single-loop tower of the overhead transmission line, poor utilization of land resources, and weak lightning protection performance due to the protection angle greater than 0 degrees, the present application provides a vertically arranged 500-kilovolt single-loop wine bottle tower, which has a small transmission line corridor width and excellent lightning protection performance.

[0005] The technical scheme of the present application is as follows:

[0006] A vertically arranged 500-kilovolt single-loop wine bottle tower comprises a tower body, a pair of outwardly extending curved arms fixed above the tower body, a vertical edge column fixed at the top of each curved arm, a horizontal beam fixed between the edge columns to form a tower window, a V-shaped insulator string fixed in the tower window, and a ground wire support fixed at the top end of each edge column. The horizontal beam has three, from top to bottom, forming a first tower window, a second tower window, and a third tower window with the edge columns.

[0007] Preferably, the top end of the ground wire support outwardly extends and forms a negative protection angle with the V-shaped insulator string.

[0008] Preferably, a pair of conductors are hung at the lower end of the V-shaped insulator string, and the horizontal spacing between the conductors is 0.4-0.6 m.

[0009] Preferably, the first tower window has a first V-shaped insulator string, the protection angle c between the first V-shaped insulator string and the ground wire support is -35.7°, the second tower window has a second V-shaped insulator string, the protection angle b between the second V-shaped insulator string and the ground wire support is -18.7°, and the third tower window has a third V-shaped insulator string, the protection angle a between the third V-shaped insulator string and the ground wire support is -12.5°.

[0010] Preferably, the intervals between the respective cross beams are the same.

[0011] Preferably, the interval between the cross beams is 10.4 m.

[0012] Preferably, the included angle of the curved arm is consistent with the included angle of the V-shaped insulator string.

[0013] Preferably, the cross beam is in the shape of an inverted K.

[0014] Preferably, the side column comprises three main materials, and adjacent main materials are fixedly connected through intersecting auxiliary inclined materials.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] (1) By changing the type of insulator string, the present application uses a V-shaped insulator string to fix the conductor, limits the wind deviation of the insulator string, further reduces the corridor range, and improves the lightning protection angle of the tower and the lightning protection performance of the line.

[0017] (2) In the embodiment of the present application, by changing the tower head arrangement, the horizontal distance of the conductor is reduced, the width of the transmission line corridor is reduced, and the corridor resources are saved.

[0018] (3) In the embodiment of the present application, by designing the unique three-main-material plus intersecting auxiliary inclined material combined structure of the side column, a triangular structure is formed, which has good planar stability and uniform stress distribution of the rod.

[0019] (4) In the embodiment of the present application, by increasing the truss cross beams between the two side columns layer by layer, the conductor load is evenly borne by the three-layer truss cross beams, the stiffness of the tower is prevented from suddenly changing, the overall stiffness is improved, the middle space gap is increased by designing the cross beam in the shape of an inverted K, the cross section size of the root structure of the cross beam is increased, the bending modulus of the cross beam is enhanced, the carrying capacity of the tower head is improved, the cross beam can be used as a work platform for later operation and maintenance, and the safety risk of high-altitude operation and live-line operation is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0021] Figure 2 isFigure 1 Partial enlarged schematic view of the middle label A;

[0022] Figure 3 Schematic view of the horizontal distance d of the conductor;

[0023] Figure 4 Schematic view of the distance D between the cross beams;

[0024] Figure 5 Top view of the structure of the present application;

[0025] Figure 6 Schematic view of the structure of the present application;

[0026] In the figure: 1-tower body, 2-curved arm, 3-side column, 4-cross beam, 5-ground wire support, 6-first tower window, 7-first V-shaped insulator string, 8-second tower window, 9-second V-shaped insulator string, 10-third tower window, 11-third V-shaped insulator string. DETAILED DESCRIPTION

[0027] The present application will be described in detail below in combination with the drawings and specific embodiments.

[0028] Referring to Figure 1 In an embodiment of the present application, a vertically arranged 500kV single-circuit wine bottle tower includes a tower body 1, a pair of outwardly extending curved arms 2 fixed above the tower body 1, a vertically arranged side column 3 fixed at the top of each curved arm, a cross beam 4 fixed between the side columns 3 to form a tower window, a V-shaped insulator string fixed in the tower window, and a ground wire support fixed at the top end of each side column. The cross beam has three, from top to bottom, forming a first tower window 6, a second tower window 8 and a third tower window 10 with the side columns.

[0029] The truss cross beams are increased layer by layer between the two side columns, and the conductor load is evenly borne by the three layers of truss cross beams, avoiding sudden changes in the stiffness of the tower and achieving the effect of improving the overall stiffness, which can improve the overall torsional performance of the tower, reduce the specifications of the main materials, and the cross beam can also serve as a force-bearing component for construction and installation, facilitating the installation of the tower.

[0030] Referring to Figures 5-6 In an embodiment of the present application, the side column 3 includes three main materials, and the adjacent main materials are fixedly connected by intersecting auxiliary diagonal materials to form a triangular structure, which has good planar stability and uniform stress on the members, and can reduce the wind area by 25% compared with the conventional rectangular cross-sectional structure, reduce the specifications of the diagonal materials, reduce the number of members, reduce the number of node connections, and reduce the amount of steel material by 7% at the tower head and the overall amount of steel material by 3% by using this cross-sectional form.

[0031] Referring to Figure 1In an embodiment of the present application, the cross beam 4 is in an inverted K shape, the middle space gap is increased, the cross beam root structure section size is increased, the cross beam bending modulus is enhanced, the tower head carrying capacity is improved, and the cross beam can be used as a work platform for later operation and maintenance, thereby reducing the safety risk of high-altitude operation and live-line operation.

[0032] In an embodiment of the present application, a pair of conductors are hung at the lower end of the V-shaped insulator string, and the conductor horizontal spacing between the conductors is 0.4-0.6 m. The conductor horizontal spacing is selected considering the characteristics of the subspan oscillation and electricity of the split conductor. The subspan oscillation is an unstable vibration phenomenon of the leeward subconductor induced by the wake of the windward subconductor. It is generally believed that the subspan oscillation phenomenon can be avoided by keeping enough distance between the split conductors. When the ratio of the conductor horizontal spacing to the subconductor diameter is greater than 16-18, the subspan oscillation can be avoided. When the ratio is less than 10, it is not suitable to be used. According to the principle that the ratio of the conductor horizontal spacing to the subconductor diameter is greater than 10, according to the common conductor outer diameter calculation, the conductor horizontal spacing value in the present application is in the range of 0.4 m-0.6 m.

[0033] Referring to Figure 3 In an embodiment of the present application, the conductor horizontal spacing d is specifically 0.5 m, the conductor horizontal spacing of a conventional tower is 50 m, the spacing is reduced by 1000 times compared with the conventional tower, the transmission line corridor width = conductor horizontal spacing + both sides of the suspension string wind deflection + both sides of the conductor wind deflection + safety distance. Since the wind deflection is fixed when the span is fixed, both sides of the suspension string wind deflection + both sides of the conductor wind deflection are fixed values. The safety distance is set by human being. If both sides of the suspension string wind deflection + both sides of the conductor wind deflection + safety distance is set to 30 m, the transmission line corridor width is 30.5 m. For example, taking the 5B1-ZM3 tower type as an example, the conductor horizontal spacing is 51.6 m, and the transmission line corridor width is 81.6 m. It can be seen that the transmission line corridor width of the present application is greatly reduced, and the resource and environmental carrying capacity is improved.

[0034] In an embodiment of the present application, the ground wire support top end extends outwardly and forms a negative protection angle with the V-shaped insulator string.

[0035] Specifically, referring to Figures 1-2, the first tower window 6 has a first V-shaped insulator string 7, the protection angle c between the first V-shaped insulator string 7 and the ground wire support 5 is -35.7°, the second tower window 8 has a second V-shaped insulator string 9, the protection angle b between the second V-shaped insulator string 9 and the ground wire support 5 is -18.7°, the third tower window 10 has a third V-shaped insulator string 11, the protection angle a between the third V-shaped insulator string 11 and the ground wire support 5 is -12.5°, because the 500kV line has high insulation strength, according to relevant research, the protection angle of the tower is sensitive to the lightning performance, the smaller the protection angle, the better the lightning performance. The tower structure features of the present application have a natural negative protection angle, which is less than -10°, compared with the 0° protection angle of the conventional tower type, the lightning performance is greatly improved.

[0036] Referring to Figure 4 In an embodiment of the present application, the intervals between the cross beams are the same, and the interval D between the cross beams is 10.4m.

[0037] In an embodiment of the present application, the included angle of the curved arm 2 is consistent with the included angle of the V-shaped insulator string, according to the stress characteristics of the V-shaped insulator string, the curved arm 2 is arranged in parallel with the V-shaped insulator string, the structure shape is coordinated with the angle of the V-shaped insulator string, the force transmission path is clear and simple, and the main material interval distribution is reasonably arranged.

[0038] The above description is only an embodiment of the present application, and does not limit the patent scope of the present application, any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A vertically arranged 500 kV single circuit wine bottle tower characterized by, The tower body is fixed with a pair of outwardly extending curved arms, each of which is fixed with a vertical side column at the top, and a cross beam is fixed between the side columns to form a tower window, and a V-shaped insulator string is fixed in the tower window, and a ground wire support is fixed at the top end of each side column, and the cross beam has three, from top to bottom, forming a first tower window, a second tower window and a third tower window with the side columns respectively; The top end of the ground wire support outwardly extends and forms a negative protection angle with the V-shaped insulator string; A pair of conductors are hung at the lower end of the V-shaped insulator string, and the horizontal spacing between the conductors is 0.4-0.6m; The first tower window has a first V-shaped insulator string, the protection angle c between the first V-shaped insulator string and the ground wire support is-35.7°, the second tower window has a second V-shaped insulator string, the protection angle b between the second V-shaped insulator string and the ground wire support is-18.7°, and the third tower window has a third V-shaped insulator string, the protection angle a between the third V-shaped insulator string and the ground wire support is-12.5°; The cross beam is in the shape of an inverted K.

2. A vertically arranged 500 kV single circuit wine bottle tower according to claim 1, characterized in that, The spacing between each cross beam is the same.

3. A vertically arranged 500 kV single circuit wine bottle tower according to claim 2, characterized in that, The spacing between the cross beams is 10.4m.

4. A vertically arranged 500 kV single circuit wine bottle tower according to claim 1, characterized in that, The included angle of the curved arm is consistent with the included angle of the V-shaped insulator string.

5. A vertically arranged 500 kV single circuit wine bottle tower according to claim 1, characterized in that, The side column includes three main materials, and adjacent main materials are fixedly connected through cross auxiliary inclined materials.

Images