Transition node structure of angle steel-steel pipe mixed main material of power transmission line iron tower

Abstract

The invention relates to a transmission line iron tower angle steel-steel pipe mixed main material transition node structure used for connecting an upper main material and a lower main material at a transmission line iron tower transition node. The upper and lower main materials at the transition node are angle steel and steel pipes respectively; the transition joint structure comprises a shoe plate, a transition plate and an annular stiffening plate. The shoe plate is parallel to the angle steel in arrangement direction, the cross section of the shoe plate is cross-shaped, and four shoe plate side edges are formed; the upper main material at the transition node comprises two steel angles, the two steel angles are arranged at two opposite angles of the shoe plate, the two side edges of the steel angles are attached to the side edges of the shoe plate respectively, and the shoe plate is fixedly connected with the steel angles through bolts; the transition plate is welded to the bottom of the shoe plate and is perpendicular to the shoe plate, the steel pipe is welded to the bottom face of the transition plate, the annular stiffening plates are arranged in the circumferential direction of the steel pipe, the tops of the annular stiffening plates are welded to the transition plate, and the side faces of the annular stiffening plates are welded to the outer wall of the steel pipe. According to the transition joint structure, main materials of the iron tower can adopt a structural form of combining angle steel and steel pipes, and the advantages of the angle steel and the steel pipes are exerted.

Description

Technical Field

[0001] The invention relates to a transition node structure of a transmission line iron tower angle steel-steel pipe mixed main material, belonging to the technical field of transmission iron towers. Background Art

[0002] The main materials of the transmission tower body are usually angle steel or steel pipe. When angle steel is used, the tower body oblique materials and auxiliary materials are arranged densely. At the same time, because the angle steel has a large shape coefficient (shape coefficient: the ratio of the surface area of ​​the building in contact with the outdoor atmosphere to the volume of the building it surrounds), the wind load on the angle steel tower body is large. At the same time, the main material connection method of the angle steel tower usually adopts the node processing method of external angle steel or internal angle steel and external plate, and the main material connection method of the steel pipe tower usually adopts the node processing method of flange connection. With the increasing tension of the transmission corridor, multiple circuits, multiple voltage levels or AC and DC towers are often erected on the same tower type, which leads to a sharp increase in the external load borne by the tower compared with conventional towers. For the tower with steel pipe as the main material, for the tower type with a smaller tower head width, in order to control the angle of the oblique material, the length of the oblique material is too short, which is not conducive to node processing. At the same time, a large number of welding processes are required at the tower head hanging point, which has high requirements for welding quality and is prone to stress concentration.

[0003] However, due to the limitation of the connection nodes of the main materials, currently only steel pipes are used as the main materials of the tower, and angle steels are used as the main diagonal materials of the crossarms and the tower body diagonal materials, but there is no situation where angle steels and steel pipes are mixed as the main materials of the tower. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a conversion transition node structure when angle steel and steel pipe, the main materials of an iron tower, are mixed and used.

[0005] In order to achieve the above-mentioned purpose, the technical solution proposed in the present invention is: a transition node structure of a transmission line tower angle steel-steel pipe mixed main material, which is used to connect the upper and lower main materials at the transition node of the transmission line tower; the upper and lower main materials at the transition node are angle steel and steel pipe respectively; the transition node structure includes a boot plate, a transition plate and annular stiffening plate; the boot plate is parallel to the setting direction of the angle steel, and the cross-section is "cross" shaped, forming four boot plate side edges; the upper main material at the transition node includes two angle steels, the two angle steels are arranged at two opposite corners of the boot plate, and the two side edges of the angle steel are respectively fitted with the side edges of the boot plate, and the boot plate and the angle steel are fixedly connected by bolts; the transition plate is welded to the bottom of the boot plate and the setting direction is perpendicular to the boot plate, the steel pipe is welded to the bottom surface of the transition plate, and a number of annular stiffening plates are arranged along the circumference of the steel pipe, the top of the annular stiffening plate is welded to the transition plate, and the side is welded to the outer wall of the steel pipe.

[0006] A further design of the above technical solution is as follows: the transition node structure also includes a boot plate stiffening plate, the plane where the boot plate stiffening plate is located is perpendicular to the planes where the transition plate and the side of the boot plate are located, the bottom of the boot plate stiffening plate is welded to the top surface of the transition plate, and the side surface is welded to a side of the boot plate.

[0007] There are a plurality of shoe plate stiffening plates, and both sides of each shoe plate side are provided with shoe plate stiffening plates.

[0008] The transition node structure also includes a ring plate, the setting direction of the ring plate is parallel to the transition plate, the top surface of the ring plate is welded to the bottom of the annular stiffening plate, and the inner ring is welded to the outer wall of the steel pipe.

[0009] The intersection point of the cross-shaped center of the boot plate and the transition plate and the intersection point of the steel pipe axis and the transition plate coincide with each other.

[0010] The width of the side edge of the shoe plate and the annular stiffening plate gradually decreases from the position close to the transition plate to the upper and lower ends.

[0011] The angle steel and the steel pipe are arranged in parallel directions, and the annular stiffening plate is arranged in a direction perpendicular to the transition plate.

[0012] If the angle steel and the steel pipe are not arranged in parallel, the arrangement direction of some annular stiffening plates is not perpendicular to the transition plate.

[0013] One side of the transition node is connected with a rod, and the transition plate extends outwardly corresponding to one side of the rod.

[0014] The rod is connected to the transition plate and the corresponding annular stiffening plate by bolts.

[0015] The beneficial effects of the present invention are:

[0016] The present invention proposes a conversion transition node structure when the main materials of angle steel and steel pipe are mixed, breaking the traditional structure that the main material of the whole tower is a single angle steel or steel pipe, so that in the same iron tower, the advantages of convenient installation of the main material of the angle steel, simple node structure processing, long calculated length of the main material of the steel pipe, and small body coefficient (0.6 to 0.8 times of that of the angle steel tower) can be fully utilized, so that the mixed use of the main material of the transmission iron tower, angle steel and steel pipe, can be more widely adopted and promoted.

[0017] The present invention can smoothly transfer the load of the upper angle steel main material to the lower angle steel main material through the conversion node, thereby realizing reliable connection of main materials with different cross-sectional forms. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of embodiment 1;

[0019] Figure 2 for Figure 1 A top view of

[0020] Figure 3 for Figure 1 Bottom view of

[0021] Figure 4 It is a structural schematic diagram of Embodiment 2;

[0022] Figure 5 for Figure 4 Top view at section AA;

[0023] Figure 6 for Figure 4 Bottom view at section BB;

[0024] In the figure: 1-angle steel, 2-steel pipe, 3-boot plate, 4-transition plate, 5-boot plate stiffener, 6-annular stiffener, 7-annular plate, 8-rod. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Embodiment 1

[0027] like Figure 1 As shown, in this embodiment, the transition node structure of the transmission line tower angle steel-steel pipe mixed main material, the upper and lower main materials at the transition node are angle steel 1 and steel pipe 2 respectively, and the angle steel and steel pipe are set in parallel without slope change.

[0028] The transition node structure includes a boot plate 3, a transition plate 4, a boot plate stiffening plate 5, an annular stiffening plate 6 and an annular plate 7; Figure 2 As shown, the boot plate 3 is a cross boot plate, including four side edges. The boot plate 3 is parallel to the setting direction of the angle steel, and the cross section is in the shape of a "cross", forming four right-angle structures. Two angle steels are provided for the upper main material, and the two angle steels are arranged at two diagonal positions of the boot plate 3, and the two side edges of the angle steel 1 are respectively fitted with the two side edges of the boot plate 3, and holes are opened on the side edges of the boot plate 3 and the side edges of the angle steel 1, and then the boot plate and the angle steel are fixedly connected by bolts.

[0029] The bottom end of the boot plate 3 is welded to the top surface of the transition plate 4, and the setting direction is perpendicular to the plane where the transition plate 4 is located. The bottom end of the angle steel 1 abuts against the transition plate 4, and the two can also be welded to increase the connection strength.

[0030] The boot plate 3 and the transition plate 4 are also reinforced by a boot plate stiffening plate 5 to enhance the connection strength between the boot plate 3 and the transition plate 4. The plane where the boot plate stiffening plate 5 is located is perpendicular to the plane where the transition plate 4 and the side of the boot plate are located. The bottom of the boot plate stiffening plate 5 is welded to the top surface of the transition plate 4, and the side surface is welded to a side of the boot plate. A boot plate stiffening plate 5 is arranged on both sides of each side of the boot plate.

[0031] The bottom surface of the transition plate 4 is welded to the steel pipe 2, and the setting direction of the steel pipe 2 is perpendicular to the plane where the transition plate 4 is located, so that the "cross" center line of the boot plate 3, that is, the center line of the two angle steels 1 coincides with the axial line of the steel pipe 2, so that the load transfer above and below the transition node is stable.

[0032] Combination Figure 3 As shown, a plurality of annular stiffening plates 6 are evenly arranged along the circumference of the steel pipe 2 , the top of the annular stiffening plates 6 are welded to the transition plate 4 , and the side surfaces are welded to the outer wall of the steel pipe 2 , so as to stiffen the steel pipe 2 and enhance the connection strength between the steel pipe 2 and the transition plate 4 .

[0033] A ring plate 7 is also welded to the bottom of the annular stiffening plate 6. The setting direction of the ring plate 7 is parallel to the transition plate 4. The top surface of the ring plate 7 is welded to the bottom of all the annular stiffening plates 6, and the inner ring is welded to the outer wall of the steel pipe 2. The ring plate 7 can further stiffen the steel pipe 2.

[0034] In this embodiment, the width of the side edge of the shoe plate 3 and the annular stiffening plate 6 gradually decreases from the position close to the transition plate 4 to the upper and lower ends.

[0035] In the conversion transition node structure of this embodiment, the upper boot plate 3 is reliably connected to the upper angle steel 1 main material, and the upper load is transferred from the upper angle steel main material to the lower steel pipe main material through the boot plate 3, the transition plate 4, and the annular stiffening plate 6, thereby achieving a perfect conversion of different main material cross-sectional forms. At the same time, through the transition node structure of this embodiment, the main material of the iron tower can adopt a structural form of a combination of angle steel and steel pipe, while giving full play to the advantages of both.

[0036] Embodiment 2

[0037] The transition node structure of the transmission line tower angle steel-steel pipe mixed main material of this embodiment is basically the same as that of the first embodiment, except that: the setting directions of the angle steel 1 and the steel pipe 2 are not parallel, there is a slope change, the setting direction of the annular stiffening plate 6 is still parallel to the axial direction of the steel pipe 2, and the setting direction of part of the annular stiffening plate 6 is not perpendicular to the transition plate; but the intersection of the "cross" center of the boot plate 3 and the transition plate 4 and the intersection of the axis of the steel pipe 2 and the transition plate 4 still coincide.

[0038] In this embodiment, a rod 8 connected along the center of the tower body is connected to one side of the transition node, and the transition plate 4 extends outward corresponding to one side of the rod 8 to increase the connection distance with the rod 8. The rod 8 is connected to the transition plate 4 and the corresponding annular stiffening plate 6 by bolts.

[0039] The technical solutions of the present invention are not limited to the above-mentioned embodiments, and any technical solutions obtained by equivalent replacement methods fall within the scope of protection required by the present invention.

Claims

1. A transition node structure of a transmission line tower angle steel-steel pipe mixed main material, used to connect the upper and lower main materials at the transition node of the transmission line tower, characterized in that: The upper and lower main materials at the transition node are angle steel and steel pipe respectively; the transition node structure includes a boot plate, a transition plate and an annular stiffening plate; the boot plate is parallel to the setting direction of the angle steel, and the cross section is in a "cross" shape, forming four boot plate side edges; the upper main material at the transition node includes two angle steels, the two angle steels are set at two diagonal positions of the boot plate, and the two side edges of the angle steels are respectively fitted with the side edges of the boot plate, and the boot plate and the angle steel are fixedly connected by bolts; the transition plate is welded to the bottom of the boot plate and the setting direction is perpendicular to the boot plate, the steel pipe is welded to the bottom surface of the transition plate, a number of annular stiffening plates are set along the circumference of the steel pipe, the top of the annular stiffening plate is welded to the transition plate, and the side is welded to the outer wall of the steel pipe.

2. According to claim 1, the transition node structure of the mixed main material of the power transmission line tower angle steel and steel pipe is characterized in that: It also includes a boot plate stiffening plate, the plane where the boot plate stiffening plate is located is perpendicular to the planes where the transition plate and the boot plate side are located, the bottom of the boot plate stiffening plate is welded to the top surface of the transition plate, and the side surface is welded to a boot plate side.

3. The transition node structure of the mixed main material of the power transmission line tower angle steel and steel pipe according to claim 2 is characterized in that: There are a plurality of shoe plate stiffening plates, and both sides of each shoe plate side are provided with shoe plate stiffening plates.

4. According to claim 3, the transition node structure of the mixed main material of the power transmission line tower angle steel and steel pipe is characterized in that: It also includes a ring plate, which is arranged in a direction parallel to the transition plate, the top surface of the ring plate is welded to the bottom of the annular stiffening plate, and the inner ring is welded to the outer wall of the steel pipe.

5. The transition node structure of the mixed main material of angle steel and steel pipe for power transmission line tower according to claim 4 is characterized in that: The intersection point of the cross-shaped center of the boot plate and the transition plate and the intersection point of the steel pipe axis and the transition plate coincide with each other.

6. The transition node structure of the mixed main material of angle steel and steel pipe for power transmission line tower according to claim 5 is characterized in that: The width of the side edge of the shoe plate and the annular stiffening plate gradually decreases from the position close to the transition plate to the upper and lower ends.

7. The transition node structure of the mixed main material of angle steel and steel pipe for power transmission line tower according to any one of claims 1 to 6, characterized in that: The angle steel and the steel pipe are arranged in parallel directions, and the annular stiffening plate is arranged in a direction perpendicular to the transition plate.

8. The transition node structure of the mixed main material of angle steel and steel pipe for power transmission line tower according to any one of claims 1 to 6, characterized in that: If the angle steel and the steel pipe are not arranged in parallel, the arrangement direction of some annular stiffening plates is not perpendicular to the transition plate.

9. The transition node structure of the mixed main material of angle steel and steel pipe for power transmission line tower according to claim 8 is characterized in that: One side of the transition node is connected with a rod, and the transition plate extends outwardly corresponding to one side of the rod.

10. The transition node structure of the mixed main material of angle steel and steel pipe for power transmission line tower according to claim 9, characterized in that: The rod is connected to the transition plate and the corresponding annular stiffening plate by bolts.

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