Overhead circuit iron tower

Abstract

The utility model relates to the technical field of electric power transmission, and particularly discloses an overhead circuit iron tower which comprises a tower body, cross arms used for supporting wires are arranged on the two sides of the upper portion of the tower body, four inclined tower legs are arranged on the periphery of the tower body, and a plurality of pulling and connecting ribs which are arranged in a crossed mode in different directions and form a tower body truss structure are arranged on the side face of the tower body. A reinforced concrete block used for supporting the tower body is arranged below each tower leg, a lifting type supporting piece capable of adjusting the height of the tower leg is arranged on each reinforced concrete block, each lifting type supporting piece comprises a stand column, the bottom of each tower leg is fixedly connected with the corresponding stand column, and the stand columns are further fixedly connected with cable-stayed connecting ribs at the bottom of the tower body. An adjusting assembly capable of adjusting the height of the stand column is arranged below the stand column. When the iron tower foundation is subjected to differential settlement and internal stress is generated, the height of the stand columns is adjusted through the adjusting assemblies, then the heights of the tower legs and the bottom inclined pulling connecting ribs are adjusted, internal stress of the iron tower is released, accidents caused by stress of the iron tower are avoided, and stable power transmission is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of power transmission, in particular to an overhead circuit iron tower. Background Art

[0002] Steel towers are commonly used in overhead power lines. Wires, cables, lightning conductors, and other equipment are mounted on them, supporting, distributing, and redirecting the lines. The main structure of a steel tower is the tower body, which typically utilizes a truss structure formed by connecting steel materials such as round steel tubes, square tubes, and angle steel. Steel sections are typically joined together at the construction site to form the tower. Wires and cables are supported from the upper portion of the tower body. The tower body is surrounded by four outward-angled legs, with tie bars extending in different directions around the tower body. A reinforced concrete foundation is located beneath the legs, to which they are fixed. Towers installed in mined-out areas or in soft geological conditions can sometimes experience settlement of the reinforced concrete foundation. If the settlement of the reinforced concrete foundation is uneven, this can cause stress in the legs and tie bars. Excessive stress can cause the tower to bend or even collapse, impacting power transmission. In order to solve the problem of uneven settlement of reinforced concrete foundations, a correction structure is set at the bottom of the tower in the prior art, such as the uneven settlement correction device for transmission towers disclosed in Chinese utility model patent CN106703091A. However, its structure is relatively complex and construction and installation are inconvenient. Utility Model Content

[0003] The utility model solves the problem that the internal stress caused by the uneven settlement of the iron tower foundation in the overhead circuit may affect the stable transmission of electricity, and provides an overhead circuit iron tower that can correct the height of the tower legs to release the internal stress of the iron tower.

[0004] In order to solve the above technical problems, the utility model includes a tower body, at least one cross arm for supporting the wires is provided on both sides of the upper part of the tower body, four inclined tower legs are provided around the periphery of the tower body, and a plurality of tie bars arranged crosswise in different directions to form a tower truss structure are provided on the side of the tower body, and a reinforced concrete block for supporting the tower body is provided under each of the tower legs. Its structural features are: a lifting support member capable of adjusting the height of the tower leg is provided on the reinforced concrete block, and the lifting support member includes a column, the bottom of the tower leg is fixedly connected to the column, and the column is also fixedly connected to the oblique tie bar at the bottom of the tower body, and an adjustment component capable of adjusting the height of the column is provided under the column.

[0005] With the above structure, the overhead conductors are mounted on crossarms, and the four tower legs are supported on reinforced concrete blocks. These blocks are equipped with lifting supports, including columns. Adjustment components adjust the height of the columns. Because the diagonal reinforcement bars at the bottom of the tower legs and tower body are fixedly connected to the risers, the legs and bottom diagonal reinforcement bars rise and fall with the columns, adjusting the height of the tower legs. In goafs or areas with soft geology, when the four reinforced concrete blocks of the tower foundation experience uneven settlement, the tower legs and reinforcement bars of the tower body will deform, generating internal stress. The greater the deformation, the greater the internal stress. If this stress exceeds the strength of the profiles and the strength of the profile connections, the tower may bend or topple, affecting the stability of the power supply. When the reinforced concrete block foundation of the iron tower settles unevenly and the height of the tower legs needs to be adjusted, if the height of one or two of the four reinforced concrete block foundations is different from that of the other reinforced concrete block foundations, the tower legs on the reinforced concrete block foundations with similar heights are used as a benchmark. If the heights of the four reinforced concrete block foundations are different, the tower legs on the reinforced concrete block with the middle height are used as a benchmark. The height of the tower legs is changed by adjusting the components so that the bottom heights of the four tower legs are similar, thereby releasing internal stress and ensuring stable operation of the iron tower.

[0006] The bottom of the column is fixedly connected to a mounting seat, and the adjustment assembly includes a plurality of sliding support legs distributed along the periphery of the mounting seat and capable of supporting the mounting seat, one end of the sliding support leg is hinged to the mounting seat, and the other end of the sliding support leg can slide along a slide groove and the position can be locked, and the slide groove is fixedly connected to the upper surface of the reinforced concrete block in a horizontal direction.

[0007] The slide groove is made of channel steel, and the opening of the slide groove faces upward. The wing arms on both sides of the slide groove are provided with multiple positioning holes arranged along the length direction of the slide groove and corresponding to each other. The end of the sliding support leg is provided with an axial hole that can pass through the positioning holes corresponding to the two ends of the slide groove. The sliding support leg is locked in position by a positioning pin shaft passing through the positioning hole and the axial hole.

[0008] The end of the positioning pin is provided with a plug to prevent the positioning pin from falling out of the sliding groove.

[0009] The mounting seat includes a support frame composed of channel steel, the upper and lower surfaces of the support frame are fixedly connected with flat plates, the periphery of the column is fixedly connected with multiple reinforcing ribs, and the reinforcing ribs are also fixedly connected to the upper surface of the mounting seat.

[0010] The tower legs and bottom oblique reinforcement are fixedly connected to the columns through reinforcing ribs.

[0011] The upper surface of the reinforced concrete block is provided with a fixed embedded bottom plate, and the chute is fixedly connected to the embedded bottom plate.

[0012] The iron tower of the utility model is suitable for small overhead circuit iron towers installed in goafs or areas with soft geology. The internal stress caused by uneven settlement of reinforced concrete block foundation is released by adjusting the height of the tower legs through lifting support members. The tower legs and the bottom inclined reinforcement are fixedly connected to the columns. The columns are fixedly connected to the mounting seat. An adjustment component capable of adjusting the height of the columns is provided below the mounting seat. The adjustment component includes a plurality of sliding support legs hinged to the mounting seat. The sliding support legs support the mounting seat and the columns, tower legs, etc. fixedly connected to the mounting seat along the periphery of the mounting seat. The sliding ends of the legs slide along horizontal chutes fixed to the reinforced concrete blocks, and the sliding ends of the sliding support legs are locked in position by positioning pins. When the reinforced concrete block foundation experiences uneven settlement and the tower leg height needs to be adjusted, a jack or other supporting tool is used to support the mounting base, the positioning pin is removed, and the height of the mounting base is adjusted with the jack to adjust the tower leg height to be similar to that of the other tower legs, releasing the internal stress of the iron tower. The positioning pin is then passed through the axial hole of the sliding support leg and the positioning hole on the chute extending therethrough, locking the position of the sliding support leg and the tower leg, and then the jack is removed. The iron tower of the utility model has the characteristics of simple structure and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the iron tower of the utility model;

[0014] Figure 2 This is a top view of the connection between the tower legs and the reinforced concrete block;

[0015] Figure 3 for Figure 2 A-direction view;

[0016] Figure 4 is a plan view of the mounting base;

[0017] Figure 5 It is a schematic diagram of the connection between the tower legs and the lifting support;

[0018] Figure 6 (a) is a schematic diagram of the sliding support leg. Figure 6 (b) is a schematic cross-sectional view of the fixed shaft seat. Figure 6 (c) is a schematic cross-sectional view of the chute;

[0019] In the figure: 1. Tower body; 11. Tower leg; 111. Connecting piece; 12. Bottom diagonal connecting bar; 13. Cross arm; 2. Lifting support member; 21. Slide groove; 211. Positioning hole; 22. Sliding support leg; 221. First axis hole; 222. Second axis hole; 23. Positioning pin; 231. Plug; 24. Fixed axis seat; 241. Fixed axis; 25. Mounting seat; 251. Support frame; 252. Upper surface plate; 253. Lower surface plate; 26. Column; 261. Reinforcement rib; 3. Reinforced concrete block; 31. Embedded bottom plate; 32. Bottom plate reinforcement; 33. Steel mesh cage; 4. Plain concrete cushion. DETAILED DESCRIPTION

[0020] Reference Figure 1-6 An overhead power line tower includes a tower body 1. At least one cross arm 13 is provided on both sides of the upper part of the tower body 1. The overhead wires are supported on the cross arm 13. Four tower legs 11 inclined outward are provided around the tower body 1. A reinforced concrete block 3 is provided under each tower leg 11. The reinforced concrete block 3 supports the upper tower body 1. The tower legs 11 are supported on the reinforced concrete blocks 3 through lifting support members 2. The lifting support members 2 can adjust the height of the tower legs 11. A plurality of tie bars arranged crosswise in different directions are provided on the side of the tower body 1. The tie bars form the truss structure of the tower body 1. The tower legs 11 are made of angle steel or square tube. The tie bars are preferably made of angle steel. Angle steel has good tensile strength and flexibility. Figure 3 As shown, a plain concrete cushion layer 4 is laid under the reinforced concrete block 3, which is a conventional setting in this field. A steel mesh cage 33 is provided inside the reinforced concrete block 3, and an embedded bottom plate 31 is provided on the upper surface of the reinforced concrete block 3. The lower surface (i.e., the bottom surface) of the reinforced concrete block 3 is fixedly connected with a plurality of bottom plate reinforcement ribs 32 embedded in the reinforced concrete block 3 to enhance the connection strength and tensile strength between the embedded bottom plate 31 and the reinforced concrete block 3.

[0021] Reference Figure 1-6 The lifting support member 2 includes a column 26, the bottom of the tower leg 11 is fixedly connected to the column 26, the bottom of the tower body 1 is provided with a bottom oblique connecting rib 12 arranged in different directions, and the end of the bottom oblique connecting rib 12 is fixedly connected to the column 26. In the accompanying drawings, the column 26 is made of round steel pipe, and its top is sealed with a flat plate. Of course, a square tube can also be used; an adjustment component that can adjust the height of the column 26 is provided below the column 26. Specifically, the bottom of the column 26 is fixedly connected to the mounting seat 25, and the adjustment component includes a plurality of sliding support legs 22 distributed along the periphery of the mounting seat 25. Four sliding support legs 22 are provided in the figure. Of course, a larger number of sliding support legs 22 can also be provided. It is determined according to the on-site conditions that the sliding support legs 22 can support the mounting seat 25 and the equipment installed on the mounting seat 25, such as Figure 3 、 5As shown, one end of the sliding support leg 22 is hinged to the mounting seat 25, and the other end of the sliding support leg 22 is set in the slide groove 21 and can slide along the slide groove 21 and lock the position. The slide groove 21 is set in the horizontal direction and is fixedly connected to the embedded base plate 31.

[0022] Reference Figure 1-6 The chute 21 is made of channel steel, and the open end of the chute 21 faces upward, so that the sliding end of the sliding support leg 22 can slide into the chute. Figure 3 、 5 As shown in FIG6 , a plurality of positioning holes 211 are provided on the wing arms on both sides of the slide 21 along the length direction of the slide 21. The positioning holes 211 on both sides are provided in a one-to-one correspondence. A first shaft hole 221 and a second shaft hole 222 are provided at both ends of the sliding support leg 22. The sliding support leg 22 is integrally formed and has a strong supporting strength. One end of the sliding support leg 22 with the first shaft hole 221 is a sliding end, and one end of the sliding support leg 22 with the second shaft hole 222 is a hinged end. The first shaft hole 221 can The positioning holes 211 corresponding to the two ends of the slide 21 are connected, so that the positioning pin 23 can pass through the first shaft hole 221 and the positioning hole 211 to achieve the position locking of the sliding support leg 22. In order to prevent the positioning pin 23 from falling out of the slide 21, a plug 231 is provided at the end of the positioning pin 23. For example, a pin hole is provided at the end of the positioning pin 23 passing through the first shaft hole 221 and the positioning hole 211. After the positioning pin 23 passes through the first shaft hole 221 and the positioning hole 211, the plug 231 is inserted into the pin hole; Figure 5 、 6 As shown, the bottom surface of the mounting seat 25 is fixedly connected with a fixed shaft seat 24 which is arranged in a one-to-one correspondence with the sliding support leg 22. The fixed shaft seat 24 is made of channel steel, and the open end of the channel steel faces downward, so that the hinged end of the sliding support leg 22 can be placed in the slot. A fixed shaft 241 is provided between the wing arms on both sides of the fixed shaft seat 24. The fixed shaft 241 passes through the second shaft hole 222 to realize the hinge connection between the sliding support leg 22 and the mounting seat 25. During installation, corresponding through holes can be opened on the wing arms on both sides of the fixed shaft seat 24, and the second shaft hole 222 is aligned with the through hole. After the fixed shaft 241 is inserted, the fixed shaft 241 is welded to the wing arms of the fixed shaft seat 24. Figure 2-5 As shown, the mounting base 25 is in a square box shape. The main structure of the mounting base 25 is a support frame 251 formed by fixed welding of channel steel. An upper surface plate 252 and a lower surface plate 253 are welded on the upper and lower surfaces of the support frame 251 respectively. The column 26 is welded on the upper surface plate 252. Figure 2 、 35, the periphery of the column 26 is fixedly connected with a plurality of reinforcing ribs 261, and the reinforcing ribs 261 are also fixedly connected to the upper surface plate 252 of the mounting base 25, so as to support and strengthen the column 26. The tower leg 11 and the bottom inclined reinforcement 12 are fixedly connected to the column 26 through the reinforcing ribs 261. Taking the tower leg 11 as an example, Figure 5 As shown, the bottom of the tower leg 11 is fixedly connected with a connecting piece 111, and the connecting piece 111 is fixedly connected to the reinforcing rib 261 by a combination of multiple sets of bolts and nuts. The connecting piece 111 is made of profiles such as angle steel or channel steel. Figure 2 Five reinforcing ribs 261 are arranged around the middle column 26, three of which are fixedly connected to the tower leg 11 and the two bottom diagonal reinforcement bars 12 respectively. Of course, more reinforcing ribs 261 can also be arranged so that the reinforcing ribs 261 are evenly distributed along the periphery of the column 26, which has a better reinforcing effect on the column 26.

[0023] 31 , the bottom plate reinforcement 32 is welded to the bottom surface of the embedded bottom plate 31, and the position of the steel mesh cage 33, the embedded bottom plate 31 and the bottom plate reinforcement 32 is fixed. The formwork is supported and concrete is poured to form the reinforced concrete block 3, during which the reinforced concrete block 3 is cured and formed; positioning holes 211 are opened on the slide 21, and the slide 21 is welded to the embedded bottom plate 31, and the welding mounting seat 25 is assembled and welded. The column 26 is welded to the upper surface plate 252 of the mounting seat 25, and the fixed shaft seat 24 is welded to the lower surface plate 253. The hinged end of the sliding support leg 22 is placed in the fixed shaft seat 24, and the fixed shaft 241 is passed through the second shaft hole 222 and the fixed shaft 241 is welded to the fixed shaft seat 24. Holes for bolts to pass through are provided on the reinforcing ribs 261 connected by the tensioning reinforcement ribs 12, and the reinforcing ribs 261 are welded to the columns 26 and the upper surface plate 252 according to the designed position, and the sliding end of the sliding support leg 22 is placed in the slide groove 21, and the first axial hole 221 is aligned with the positioning hole 211, and the positioning pin 23 is passed through the positioning hole 211 and the first axial hole 221, and the plug 231 is inserted into the end of the positioning pin 23, and the position of the mounting seat 25 and the column 26 is fixed. At this time, the column 26 is in a vertical state, and the heights of the columns 26 at the four supporting positions are basically the same. The tower legs 11 and the bottom oblique tensioning reinforcement 12 are fixedly connected to the reinforcing ribs 261 with a combination of bolts and nuts, and then steel profiles and fasteners are used to assemble from bottom to top to form an iron tower. The assembly method of the iron tower is the conventional method, and fasteners or welding are used for connection and fixation. After the iron tower is assembled, the overhead wires are installed. The iron tower of the utility model is suitable for small iron towers installed in goafs or soft geological areas. When the reinforced concrete blocks 3 undergo uneven settlement, stress is generated inside the iron tower, which will cause potential risks to power transmission. When the reinforced concrete blocks 3 undergo uneven settlement and the height of the tower legs 11 needs to be adjusted, if one or two reinforced concrete blocks 3 are different in height from the rest of the reinforced concrete blocks 3, the tower legs 11 of one of the reinforced concrete blocks 3 with a similar height are used as a reference. If the heights of the four reinforced concrete blocks 3 are different, the tower legs 11 of the middle height reinforced concrete blocks 3 are used as a reference. The tower leg 11 of the concrete block 3 is used as a reference. A spirit level is used to determine the height to which the tower leg 11 needs to be raised or lowered. Two jacks are used to support the mounting base 25 from both sides. The plug 231 and the positioning pin 23 are removed. Then, the jack is used to raise or lower the height of the tower leg 11 to an appropriate height to release the internal stress of the tower. At this time, the positioning pin 23 is inserted into the first axis hole 221 and the positioning hole 211 opposite to the first axis hole 221. Then, the plug 231 is inserted into the positioning pin 23. The position of the sliding support leg 22 is locked. The height adjustment of the tower leg 11 is completed and the jack is removed.

[0024] The iron tower of the utility model is suitable for small overhead circuits in goafs or geologically soft areas. By adjusting the height of the column, the height of the tower legs fixedly connected to the column and the bottom oblique reinforcement bars can be adjusted, thereby releasing the internal stress caused by uneven settlement of the reinforced concrete block foundation of the iron tower, preventing the iron tower from bending or tipping over due to the internal stress, and ensuring stable power transmission; the column is installed on the mounting seat, and the mounting seat is supported by the inclined sliding support legs. When the sliding end of the sliding support leg slides in the slide groove, its support height changes, thereby realizing the adjustment of the column height. The structure is simple and the operation is convenient.

Claims

1. An overhead circuit iron tower, comprising a tower body (1), at least one cross arm (13) for supporting a conductor being provided on both sides of the upper portion of the tower body (1), four inclined tower legs (11) being provided around the periphery of the tower body (1), a plurality of tie bars arranged crosswise in different directions to form a truss structure of the tower body (1) being provided on the side surface of the tower body (1), a reinforced concrete block (3) for supporting the tower body (1) being provided below each of the tower legs (11), and characterized in that: The reinforced concrete block (3) is provided with a lifting support member (2) capable of adjusting the height of the tower leg (11), the lifting support member (2) includes a column (26), the bottom of the tower leg (11) is fixedly connected to the column (26), and the column (26) is also fixedly connected to the bottom oblique reinforcement (12) of the tower body (1), and an adjustment component capable of adjusting the height of the column (26) is provided below the column (26).

2. The overhead circuit iron tower according to claim 1, characterized in that: The bottom of the column (26) is fixedly connected to a mounting seat (25), and the adjustment assembly includes a plurality of sliding support legs (22) distributed along the periphery of the mounting seat (25) and capable of supporting the mounting seat (25), one end of the sliding support leg (22) is hinged to the mounting seat (25), and the other end of the sliding support leg (22) can slide along a slide groove (21) and its position can be locked, and the slide groove (21) is fixedly connected to the upper surface of the reinforced concrete block (3) in a horizontal direction.

3. The overhead circuit iron tower according to claim 2, characterized in that: The slide groove (21) is made of channel steel, and the opening of the slide groove (21) faces upward. The wing arms on both sides of the slide groove (21) are provided with a plurality of positioning holes (211) arranged along the length direction of the slide groove (21) and corresponding to each other. The end of the sliding support leg (22) is provided with an axial hole that can penetrate the positioning holes (211) corresponding to the two ends of the slide groove (21). The sliding support leg (22) is locked in position by a positioning pin shaft (23) that penetrates the positioning hole (211) and the axial hole.

4. The overhead circuit tower according to claim 3, wherein: The end of the positioning pin shaft (23) is provided with a plug (231) for preventing the positioning pin shaft (23) from falling out of the slide groove (21).

5. The overhead circuit iron tower according to claim 2, characterized in that: The mounting seat (25) includes a support frame (251) composed of channel steel, and the upper and lower surfaces of the support frame (251) are fixedly connected to flat plates. The periphery of the column (26) is fixedly connected to a plurality of reinforcing ribs (261), and the reinforcing ribs (261) are also fixedly connected to the upper surface of the mounting seat (25).

6. The overhead circuit iron tower according to claim 5, characterized in that: The tower legs (11) and the bottom oblique connecting reinforcement (12) are fixedly connected to the columns (26) via reinforcing ribs (261).

7. The overhead circuit tower according to claim 2, characterized in that: A fixed embedded bottom plate (31) is provided on the upper surface of the reinforced concrete block (3), and the chute (21) is fixedly connected to the embedded bottom plate (31).

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