Iron tower cross arm connecting node in heavy ice area
By using locally connecting short angle steel to bolted assemblies to the node plates at the crossarm connection nodes of the tower, a compact T-shaped structure is formed, which solves the problem of insufficient load-bearing capacity in the crossarm node design of UHV lines in high-altitude heavy icing areas and improves the stability and safety of the tower.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2026-03-13
AI Technical Summary
In ultra-high voltage transmission lines in high-altitude heavy icing areas, the existing tower crossarm connection node design is difficult to meet the requirements of large loads. The traditional angle steel section is insufficient, which increases the difficulty of node design and makes the force transmission path unclear, affecting the safety and stability of the tower.
The short angle steel is connected to the gusset plate by bolt assemblies to form a compact T-shaped structure, which shortens the length of the bolt group of the crossarm node, enhances the rigidity and integrity of the gusset plate, and clarifies the force transmission path.
It effectively improves the load-bearing capacity of crossarm nodes, simplifies the manufacturing and installation process, enhances the stability and safety of the tower, and is suitable for UHV transmission lines in heavy icing areas.
Smart Images
Figure CN223991636U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a crossarm connection node for iron towers in heavy icing areas, which is mainly used in the fields of ultra-high voltage and extra-high voltage transmission line towers in heavy icing areas. Background Technology
[0002] Ultra-high voltage (UHV) lines refer to AC lines of 1000kV and above or DC lines of ±800kV and above. They have outstanding advantages such as large transmission power, low line loss, small footprint, and high energy utilization efficiency, and are regarded as an important channel for national energy transmission and a core hub of the modern power system.
[0003] Compared to conventional high-voltage line towers, ultra-high-voltage (UHV) line towers experience significantly increased external loads and larger tower structures, posing considerable challenges to the overall structural design, particularly the design of critical nodes at the tower head. When tower loads are substantial, traditional angle steel sections cannot meet design strength requirements. In such cases, using large-specification angle steel (L220, L250, L280, L300), double-section angle steel, or four-section combined angle steel can effectively improve the stable load-bearing capacity of the tower's main structure. In recent years, the construction of UHV lines in high-altitude and heavy icing areas has been increasing, with altitudes exceeding 4000m and maximum icing thickness reaching 60mm. The high-altitude electromagnetic environment and heavy icing loads further complicate tower design in these regions. Therefore, the planning and design of critical nodes for UHV towers in high-altitude heavy icing areas is crucial for improving the safety of UHV tower nodes. Utility Model Content
[0004] To address the technical problems existing in the design of crossarm connection nodes for conductors in high-altitude heavy icing areas, this utility model provides a crossarm connection node for iron towers in heavy icing areas.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A crossarm connection node for a steel tower in heavy icing zones includes a main tower member, a node plate, the node plate being connected to the main tower member via bolt assemblies; a lower plane main member of the crossarm, which is placed horizontally and connected to the node plate via bolt assemblies; and a partially connecting short angle steel, which is placed horizontally and connected to the node plate via bolt assemblies.
[0007] The main material of the lower plane of the crossarm includes a first main material of the lower plane of the crossarm and a second main material of the lower plane of the crossarm. The first main material of the lower plane of the crossarm and the second main material of the lower plane of the crossarm are connected by bolt assembly to form a T-shaped structure.
[0008] The partial connecting short angle steel includes a first partial connecting short angle steel and a second partial connecting short angle steel, which are connected by a bolt assembly to form a T-shaped structure.
[0009] The first and second partial connecting short angle steels extend beyond the range of the node plate, and the length of the extended portion is equal to the leg width of the first crossarm lower plane main member and the second crossarm lower plane main member.
[0010] The upper limbs of the main material on the lower plane of the first crossarm and the upper limbs of the main material on the lower plane of the second crossarm are connected to the node plate by bolt assemblies.
[0011] The lower limbs of the first and second partial connecting short angle steels are bolted together with the node plate.
[0012] The left side of the main material on the lower plane of the first crossarm is connected to the left side of the first partially connecting short angle steel by bolt assembly.
[0013] The right side of the main material on the lower plane of the second crossarm and the right side of the second partial connecting short angle steel are spliced together by bolt assemblies.
[0014] The upper limbs of the extension portions of the first and second partial connecting short angle steels are spliced using bolt assemblies, and the lower limbs of the main members of the lower plane of the first and second crossarms are spliced using the bolt assemblies.
[0015] The main material of the lower surface of the crossarm is double angle steel or single angle steel.
[0016] The aforementioned crossarm connection node for a heavy icing zone iron tower further includes: a first tower body inclined member, which is placed at an angle and connected to the node plate via a bolt assembly, with the connection point located at the upper left part of the node plate; a tower body horizontal diaphragm member, which is placed horizontally and connected to the node plate via a bolt assembly; a second tower body inclined member, which is placed at an angle and connected to the node plate via a bolt assembly, with the connection point located at the lower left part of the node plate; and a crossarm front inclined member, which is placed at an angle and connected to the node plate via a bolt assembly, with the connection point located at the upper right part of the node plate.
[0017] The inclination angles of the first and second tower body inclined members are in the range of 35° to 45°.
[0018] The inclination angle of the diagonal member on the front of the crossarm is in the range of 35° to 45°.
[0019] This invention provides a crossarm connection node for transmission towers in heavy icing areas. By setting short connecting angle steel at the root of the main crossarm member, the length of the crossarm node bolt group is effectively reduced, thereby reducing the size of the node plate. The connection node is compact, has high rigidity, good overall integrity, simple and reasonable local structure, clear force transmission path, and is convenient and quick to manufacture and install. It can be widely used in transmission towers in heavy icing areas. Attached Figure Description
[0020] Figure 1 This is a diagram showing the layout of the crossarms and tower components of an iron tower in a heavy icing zone.
[0021] Figure 2 This is a structural diagram of the crossarm connection node of the iron tower in the heavy icing zone.
[0022] Figure 3 yes Figure 2 AA cross-sectional view of the crossarm connection node of the iron tower in the heavy icing zone.
[0023] Figure 4 yes Figure 2 BB cross-section of the crossarm connection node of the iron tower in the heavy icing zone.
[0024] Meaning of the reference numerals in the diagram:
[0025] 1—Main material of the iron tower, 2—Node plate, 3—First tower body diagonal member, 4—Horizontal member of the tower body transverse diaphragm, 5—Second tower body diagonal member, 6—Diagonal member on the front of the crossarm, 7—Main material of the lower plane of the first crossarm, 8—Main material of the lower plane of the second crossarm, 9—First partial connecting short angle steel, 10—Second partial connecting short angle steel. Detailed Implementation
[0026] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments and specific features in the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations thereof. In the absence of conflict, the embodiments and technical features in the embodiments can be combined with each other.
[0027] Example 1:
[0028] For reference Figures 1-2 As shown, a crossarm connection node for a steel tower in a heavy icing zone includes a main tower member 1 and a node plate 2, wherein the node plate 2 is connected to the main tower member 1 by a bolt assembly.
[0029] The first tower body inclined member 3 is placed at an angle and connected to the node plate 2 by a bolt assembly, with the connection point located at the upper left part of the node plate 2.
[0030] The horizontal diaphragm 4 of the tower body is placed horizontally and connected to the node plate 2 by bolt assembly.
[0031] The second tower body inclined member 5 is placed at an angle and connected to the node plate 2 by a bolt assembly, with the connection point located at the lower left part of the node plate 2.
[0032] The crossarm front inclined member 6 is placed at an angle and connected to the node plate 2 by a bolt assembly, with the connection point located at the upper right part of the node plate 2.
[0033] The inclination angles of the first tower body inclined member 3 and the second tower body inclined member 5 are within the range of 35° to 45°, which allows the first tower body inclined member 3 and the second tower body inclined member 5 to provide greater support for the crossarm.
[0034] The inclination angle of the front inclined member 6 of the crossarm is in the range of 35° to 45°, which allows the front inclined member 6 of the crossarm to provide greater support for the crossarm.
[0035] The main material on the lower plane of the crossarm is placed horizontally and connected to the node plate 2 by bolt assembly.
[0036] A short angle steel for partial connection is provided, which is placed horizontally and connected to the node plate 2 by a bolt assembly.
[0037] refer to Figure 3 As shown, the main material of the lower plane of the crossarm includes a first main material 7 and a second main material 8, which are connected by a bolt assembly to form a T-shaped structure; the partial connecting short angle steel includes a first partial connecting short angle steel 9 and a second partial connecting short angle steel 10, which are connected by a bolt assembly to form a T-shaped structure.
[0038] refer to Figure 4 As shown, further, the first partial connecting short angle steel 9 and the second partial connecting short angle steel 10 extend beyond the range of the node plate, and the length of the extended portion is equal to the leg width of the first crossarm lower plane main member 7 and the second crossarm lower plane main member 8. The portion of the partial connecting short angle steel extending beyond the range of the node plate is connected to the crossarm lower plane main member to ensure that the end load of the crossarm lower plane main member is effectively transferred to the partial connecting short angle steel.
[0039] The upper limbs of the first crossarm lower plane main material 7 and the upper limbs of the second crossarm lower plane main material 8 are connected to the node plate 2 by bolt assemblies.
[0040] The lower limb of the first partial connecting short angle steel 9 and the lower limb of the second partial connecting short angle steel 10 are connected to the node plate 2 by bolt assembly.
[0041] The left side of the main material 7 on the lower plane of the first crossarm is connected to the left side of the first partially connecting short angle steel 9 by bolt assembly.
[0042] The right side of the main member 8 on the lower plane of the second crossarm and the right side of the short angle steel 10 in the second partial connection are spliced together by bolt assembly.
[0043] The upper limbs of the extension portions of the first partial connecting short angle steel 9 and the second partial connecting short angle steel 10 are spliced using bolt assemblies, and the lower limbs of the first crossarm lower plane main material 7 and the second crossarm lower plane main material 8 are spliced using the bolt assemblies.
[0044] The main material of the lower surface of the crossarm is double angle steel or single angle steel.
[0045] Example 2:
[0046] The upper edge of the first crossarm lower plane main material 7 and the upper edge of the second crossarm lower plane main material 8 are connected to the node plate 2 by welding.
[0047] The lower limb of the first partial connecting short angle steel 9 and the lower limb of the second partial connecting short angle steel 10 are connected to the node plate 2 by welding.
[0048] The left side of the main material 7 on the lower plane of the first crossbeam is connected to the left side of the first partial connecting short angle steel 9 by welding.
[0049] The right side of the main material 8 on the lower plane of the second crossarm and the right side of the second partial connecting short angle steel 10 are connected by welding.
[0050] The aforementioned tower materials were lifted and installed on-site using a truck crane or a tower erection gantry.
[0051] This utility model discloses a crossarm connection node for transmission towers in heavy icing areas. By setting short connecting angle steel at the root of the main crossarm material, the length of the crossarm node bolt group is effectively reduced, thereby reducing the size of the node plate. It has a compact layout, high rigidity, good overall integrity, simple and reasonable local structure, clear force transmission path, and is convenient and quick to manufacture and install. It can be widely used in transmission towers in heavy icing areas.
[0052] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0053] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0054] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A heavy ice zone tower crossarm connection node, characterized by, It comprises a tower main material (1) and a node plate (2), the node plate (2) is connected with the tower main material (1) through a bolt assembly; The cross arm lower plane main material is horizontally placed and connected with the node plate (2) through a bolt assembly; The local connection short angle steel is horizontally placed and connected with the node plate (2) through a bolt assembly; The cross arm lower plane main material comprises a first cross arm lower plane main material (7) and a second cross arm lower plane main material (8), the first cross arm lower plane main material (7) and the second cross arm lower plane main material (8) are connected to form a T-shaped structure through a bolt assembly; The local connection short angle steel comprises a first local connection short angle steel (9) and a second local connection short angle steel (10), the first local connection short angle steel (9) and the second local connection short angle steel (10) are connected to form a T-shaped structure through a bolt assembly.
2. The heavy ice zone tower crossarm connection node of claim 1, wherein, The first local connection short angle steel (9) and the second local connection short angle steel (10) extend out of the range of the node plate (2), and the length of the extension part is equal to the limb width of the first cross arm lower plane main material (7) and the second cross arm lower plane main material (8).
3. The heavy ice zone tower crossarm connection node of claim 1, wherein, The upper limb edge of the first cross arm lower plane main material (7) and the upper limb edge of the second cross arm lower plane main material (8) are spliced with the node plate (2) through a bolt assembly.
4. The heavy ice zone tower crossarm connection node of claim 3, wherein, The lower limb edge of the first local connection short angle steel (9) and the lower limb edge of the second local connection short angle steel (10) are spliced with the node plate (2) through a bolt assembly.
5. The heavy ice zone tower crossarm connection node of claim 4, wherein, The left limb edge of the first cross arm lower plane main material (7) and the left limb edge of the first local connection short angle steel (9) are spliced through a bolt assembly.
6. The heavy ice zone tower crossarm connection node of claim 4, wherein, The right limb edge of the second cross arm lower plane main material (8) and the right limb edge of the second local connection short angle steel (10) are spliced through a bolt assembly.
7. The heavy ice zone tower crossarm connection node of claim 2, wherein, The upper limb edge of the extension part of the first local connection short angle steel (9) and the second local connection short angle steel (10) is spliced through a bolt assembly, and the lower limb edge of the first cross arm lower plane main material (7) and the second cross arm lower plane main material (8) is spliced through the bolt assembly.
8. The heavy ice zone tower crossarm connection node of claim 1, wherein, The cross arm lower plane main material is double angle steel or single angle steel.
9. The heavy ice zone tower crossarm connection node of claim 1, wherein, It also comprises: A first tower body inclined material (3) is inclinedly placed and connected with the node plate (2) through a bolt assembly, and the connection is located at the upper left part of the node plate (2); A tower body horizontal material (4) is horizontally placed and connected with the node plate (2) through a bolt assembly; A second tower body inclined material (5) is inclinedly placed and connected with the node plate (2) through a bolt assembly, and the connection is located at the lower left part of the node plate (2); A cross arm front inclined material (6) is inclinedly placed and connected with the node plate (2) through a bolt assembly, and the connection is located at the upper right part of the node plate (2).
10. The heavy ice zone tower crossarm connection node of claim 9, wherein, The inclination angle of the first tower body inclined material (3) and the second tower body inclined material (5) is in the range of 35°~45°.
11. The heavy ice zone tower crossarm connection node of claim 9, wherein, The inclination angle of the cross arm front inclined material (6) is in the range of 35°~45°.