A method for crossing a multi-layer overhead transmission line crossing tower and line

Abstract

This invention belongs to the field of power transmission line design and operation technology, and relates to a method for crossing towers and lines in multi-layer overhead power transmission lines. The invention includes a fixedly connected tower body, tower legs, a first ground wire support, a second ground wire support, a first crossarm, a second crossarm, a third crossarm, and a fourth crossarm. By distributing the four sets of crossarms at intervals between upper and lower layers, the problem of insufficient lateral distance for multiple parallel circuits at small crossing angles is overcome, increasing the electrical safety distance and reducing the risk of accidents. Two sets of ground wire supports can provide full protection for each circuit, further improving line safety when crossing at similar voltage levels and under severe conditions such as wind deflection and galloping. Through a reasonable crossarm spacing arrangement, the external forces on the tower are dispersed, reducing local stress concentration and improving the structural safety and reliability.

Description

Technical Field

[0001] This invention belongs to the field of power transmission line design and operation technology, and relates to a method for crossing towers and lines in multi-level overhead power transmission lines. Background Technology

[0002] As the power grid continues to expand, transmission lines are becoming increasingly dense around some cities, leading to greater land scarcity. Inevitably, different lines will cross each other, making these crossing sections critical weak points in the power grid's operation. Their safety level directly impacts the reliability of the entire power system. Current crossing engineering designs typically employ methods such as selecting appropriate crossing angles, ensuring minimum clearance distances that meet regulations, or, when necessary, raising towers or replacing insulators to guarantee safety. However, when faced with complex conditions such as excessively small crossing angles (e.g., less than 30°), limited transmission corridor space, or the need to cross multiple existing lines or important facilities (such as railways, highways, and rivers) at once, conventional crossing tower solutions often struggle to balance safety and economy, posing potential risks and threatening the long-term stable operation of the power grid. Summary of the Invention

[0003] The purpose of this invention is to provide a method for crossing towers and lines in a multi-layer overhead transmission line crossing manner, in order to solve the technical problem that conventional crossing tower schemes often fail to balance safety and economy when the crossing angle is too small and the transmission corridor space is limited in the design of power grid line crossing projects.

[0004] To achieve the above objectives, the present invention employs the following technical solution: In a first aspect, the present invention provides a multi-layer overhead transmission line crossing tower, comprising a fixedly connected tower body and tower legs, and further comprising: The first ground wire support is fixed to the tower body; The second grounding wire bracket is fixed to the tower body and located between the first grounding wire bracket and the tower leg; The first and second crossarms are fixed symmetrically or asymmetrically on both sides of the tower body; The third and fourth crossarms are symmetrically or asymmetrically fixed on both sides of the tower body, with the third crossarm located below the first crossarm and the fourth crossarm located below the second crossarm. The first, second, third, and fourth crossarms are all distributed in two alternating layers.

[0005] Furthermore, both ends of the first ground wire bracket and the second ground wire bracket are provided with hanging points for suspending ground wires or fiber optic composite ground wires.

[0006] Furthermore, the first grounding bracket includes a first left grounding bracket and a first right grounding bracket. The first left grounding bracket and the first right grounding bracket have the same structure and are arranged symmetrically or asymmetrically on both sides of the tower body. The end of the first left grounding bracket away from the tower body is provided with a first left grounding point, and the end of the first right grounding bracket away from the tower body is provided with a first right grounding point. The second grounding bracket includes a second left grounding bracket and a second right grounding bracket. The second left grounding bracket and the second right grounding bracket have the same structure and are arranged symmetrically or asymmetrically on both sides of the tower body. The end of the second left grounding bracket away from the tower body is provided with a second left grounding point, and the end of the second right grounding bracket away from the tower body is provided with a second right grounding point.

[0007] Furthermore, the first crossarm includes a first upper crossarm, a first middle crossarm, and a first lower crossarm. The first upper crossarm, the first middle crossarm, and the first lower crossarm are all fixedly connected to the tower body. The first middle crossarm is located between the first upper crossarm and the first lower crossarm. The second crossarm includes a second upper crossarm, a second middle crossarm, and a second lower crossarm. The second upper crossarm, the second middle crossarm, and the second lower crossarm are all fixedly connected to the tower body. The second middle crossarm is located between the second upper crossarm and the second lower crossarm. The first upper crossarm and the second upper crossarm are arranged symmetrically or asymmetrically; the first middle crossarm and the second middle crossarm are arranged symmetrically or asymmetrically; the first lower crossarm and the second lower crossarm are arranged symmetrically or asymmetrically.

[0008] Furthermore, the third crossarm includes a third upper crossarm, a third middle crossarm, and a third lower crossarm. The third upper crossarm, the third middle crossarm, and the third lower crossarm are all fixedly connected to the tower body. The third middle crossarm is located between the third upper crossarm and the third lower crossarm. The fourth crossarm includes a fourth upper crossarm, a fourth middle crossarm, and a fourth lower crossarm. The fourth upper crossarm, the fourth middle crossarm, and the fourth lower crossarm are all fixedly connected to the tower body. The fourth middle crossarm is located between the fourth upper crossarm and the fourth lower crossarm. The third upper crossarm and the fourth upper crossarm are arranged symmetrically or asymmetrically; the third middle crossarm and the fourth middle crossarm are arranged symmetrically or asymmetrically; the third lower crossarm and the fourth lower crossarm are arranged symmetrically or asymmetrically.

[0009] Furthermore, the tower body is made of steel and has a rectangular or square cross-sectional shape.

[0010] Furthermore, the lines suspended by the first and second crossarms are at a first voltage level, and the lines suspended by the third and fourth crossarms are at a second voltage level, which is equal to or lower than the first voltage level.

[0011] Furthermore, the first crossarm and the third crossarm are arranged on the same side, and the second crossarm and the fourth crossarm are arranged on the same side.

[0012] Furthermore, maintenance access channels are provided on the first grounding bracket, the second grounding bracket, the first crossarm, the second crossarm, the third crossarm, and the fourth crossarm.

[0013] Secondly, the present invention provides a method for crossing power lines using multi-layered overhead transmission line crossing towers, comprising the following steps: The tower body is fixed to the ground using tower legs; A first ground wire bracket and a second ground wire bracket are fixedly installed on the upper part of the tower body, with the second ground wire bracket located between the first ground wire bracket and the tower leg; The first and second crossarms located on the upper layer are installed symmetrically or asymmetrically on the tower body. The third and fourth crossarms are installed symmetrically or asymmetrically on the tower body, with the third crossarm located below the first crossarm and the fourth crossarm located below the second crossarm. The first voltage level line is suspended by the first and second crossarms on the upper layer, and the first voltage level line is suspended by the third and fourth crossarms on the lower layer. The second voltage level is equal to or lower than the first voltage level.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention overcomes the problem of insufficient lateral distance for multiple parallel circuits at small crossing angles by using four sets of crossarms spaced at intervals between upper and lower layers. This increases the electrical safety distance under wind deflection conditions and reduces the risk of accidents. Two sets of ground wire supports provide full protection for each circuit, further enhancing line safety when crossing circuits of similar voltage levels under severe wind deflection and galloping conditions. The reasonable crossarm spacing disperses external forces on the towers, reducing local stress concentration and improving the structural safety and reliability.

[0015] This invention utilizes four sets of crossarms spaced at intervals in upper and lower layers, creating a multi-layered distribution of conductors in space. This enables three-dimensional crossing of transmission lines of different voltage levels or circuits on the same tower, solving the problem of conventional crossing tower schemes failing to balance safety and economy in power grid line crossing projects when the crossing angle is too small and the transmission corridor space is limited. In terms of safety, it enhances lightning protection and improves the structural reliability. Regarding transmission capacity, it enables the parallel erection of multiple circuits and multiple voltage levels, increasing transmission capacity. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a flowchart of a method according to an embodiment of the present invention.

[0017] Among them: 1. First ground wire bracket; 1-1. First left ground wire bracket; 1-2. First right ground wire bracket; 2. First ground wire hanging point; 2-1. First left ground wire hanging point; 2-2. First right ground wire hanging point; 3. First crossarm; 3-1. First upper crossarm; 3-2. First middle crossarm; 3-3. First lower crossarm; 4. Second crossarm; 4-1. Second upper crossarm; 4-2. Second middle crossarm; 4-3. Second lower crossarm; 5. Second 5-1. Second left ground wire bracket; 5-2. Second right ground wire bracket; 6. Second ground wire hanging point; 6-1. Second left ground wire hanging point; 6-2. Second right ground wire hanging point; 7. Third crossarm; 7-1. Third upper crossarm; 7-2. Third middle crossarm; 7-3. Third lower crossarm; 8. Fourth crossarm; 8-1. Fourth upper crossarm; 8-2. Fourth middle crossarm; 8-3. Fourth lower crossarm; 9. Tower body; 10. Tower leg. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0019] It should be noted that the terms "first," "second," etc., in the specification and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0020] The present invention will now be described in further detail with reference to the accompanying drawings: Example 1: See Figure 1 The present invention discloses a multi-layer overhead transmission line crossing tower, including a tower body 9 and tower legs 10 that are fixedly connected, and also includes: a first ground wire support 1, a second ground wire support 5, a first crossarm 3, a second crossarm 4, a third crossarm 7 and a fourth crossarm 8.

[0021] The first grounding bracket 1 is fixed to the tower body 9; the second grounding bracket 5 is fixed to the tower body 9 and located between the first grounding bracket 1 and the tower leg 10. The design of these two sets of grounding brackets enables full protection for each circuit.

[0022] In a preferred embodiment of the present invention, both ends of the first ground wire bracket 1 and the second ground wire bracket 5 are provided with hanging points for suspending ground wires or optical fiber composite ground wires (OPGW).

[0023] In a preferred embodiment of the present invention, the first grounding bracket 1 includes a first left grounding bracket 1-1 and a first right grounding bracket 1-2. The first left grounding bracket 1-1 and the first right grounding bracket 1-2 have the same structure and are symmetrically arranged on both sides of the tower body 9. The end of the first left grounding bracket 1-1 away from the tower body 9 is provided with a first left grounding point 2-1, and the end of the first right grounding bracket 1-2 away from the tower body 9 is provided with a first right grounding point 2-2. The second grounding bracket 5 includes a second left grounding bracket 5-1 and a second right grounding bracket 5-2. The second left grounding bracket 5-1 and the second right grounding bracket 5-2 have the same structure and are symmetrically arranged on both sides of the tower body 9. The end of the second left grounding bracket 5-1 away from the tower body 9 is provided with a second left grounding point 6-1, and the end of the second right grounding bracket 5-2 away from the tower body 9 is provided with a second right grounding point 6-2.

[0024] The first crossarm 3 and the second crossarm 4 are symmetrically fixed on both sides of the tower body 9; the third crossarm 7 and the fourth crossarm 8 are symmetrically fixed on both sides of the tower body 9, with the third crossarm 7 located below the first crossarm 3 and the fourth crossarm 8 located below the second crossarm 4. The first crossarm 3, the second crossarm 4, the third crossarm 7, and the fourth crossarm 8 are all distributed in two layers at intervals. This layered distribution design of the four crossarms fundamentally overcomes the problem of insufficient lateral distance when multiple circuits run parallel at small crossing angles, further improving electrical safety distances.

[0025] In a preferred embodiment of the present invention, the first crossarm 3 includes a first upper crossarm 3-1, a first middle crossarm 3-2 and a first lower crossarm 3-3. The first upper crossarm 3-1, the first middle crossarm 3-2 and the first lower crossarm 3-3 are all fixedly connected to the tower body 9. The first middle crossarm 3-2 is located between the first upper crossarm 3-1 and the first lower crossarm 3-3. The second crossarm 4 includes a second upper crossarm 4-1, a second middle crossarm 4-2, and a second lower crossarm 4-3. The second upper crossarm 4-1, the second middle crossarm 4-2, and the second lower crossarm 4-3 are all fixedly connected to the tower body 9. The second middle crossarm 4-2 is located between the second upper crossarm 4-1 and the second lower crossarm 4-3. The first upper crossarm 3-1 and the second upper crossarm 4-1 are arranged symmetrically or asymmetrically; the first middle crossarm 3-2 and the second middle crossarm 4-2 are arranged symmetrically or asymmetrically; the first lower crossarm 3-3 and the second lower crossarm 4-3 are arranged symmetrically or asymmetrically.

[0026] In a preferred embodiment of the present invention, the third crossarm 7 includes a third upper crossarm 7-1, a third middle crossarm 7-2, and a third lower crossarm 7-3. The third upper crossarm 7-1, the third middle crossarm 7-2, and the third lower crossarm 7-3 are all fixedly connected to the tower body 9. The third middle crossarm 7-2 is located between the third upper crossarm 7-1 and the third lower crossarm 7-3. The fourth crossarm 8 includes a fourth upper crossarm 8-1, a fourth middle crossarm 8-2, and a fourth lower crossarm 8-3. The fourth upper crossarm 8-1, the fourth middle crossarm 8-2, and the fourth lower crossarm 8-3 are all fixedly connected to the tower body 9. The fourth middle crossarm 8-2 is located between the fourth upper crossarm 8-1 and the fourth lower crossarm 8-3. The third upper crossarm 7-1 and the fourth upper crossarm 8-1 are arranged symmetrically or asymmetrically; the third middle crossarm 7-2 and the fourth middle crossarm 8-2 are arranged symmetrically or asymmetrically; the third lower crossarm 7-3 and the fourth lower crossarm 8-3 are arranged symmetrically or asymmetrically.

[0027] In a preferred embodiment of the present invention, the tower body 9 is made of steel and its cross-sectional shape is rectangular or square.

[0028] In a preferred embodiment of the present invention, the lines suspended by the first crossarm 3 and the second crossarm 4 are at a first voltage level, and the lines suspended by the third crossarm 7 and the fourth crossarm 8 are at a second voltage level, wherein the second voltage level is equal to or lower than the first voltage level.

[0029] In a preferred embodiment of the present invention, the first crossarm 3 and the third crossarm 7 are arranged on the same side, and the second crossarm 4 and the fourth crossarm 8 are arranged on the same side.

[0030] In a preferred embodiment of the present invention, maintenance channels are provided on the first grounding bracket 1, the second grounding bracket 5, the first crossarm 3, the second crossarm 4, the third crossarm 7, and the fourth crossarm 8.

[0031] See Figure 2 Based on the above structure, the present invention also discloses a method for crossing towers in a multi-layer overhead transmission line, comprising the following steps: S1, the tower body 9 is fixedly installed on the ground by the tower legs 10, providing a stable foundation support for the entire tower structure, ensuring that the tower can withstand various external forces during subsequent installation and operation, such as conductor tension, wind load, ice load, etc., ensuring the stability of the tower, and laying the foundation for subsequent conductor suspension and safe operation.

[0032] S2, a first ground wire bracket 1 and a second ground wire bracket 5 are fixedly installed on the upper part of the tower body 9. The second ground wire bracket 5 is located between the first ground wire bracket 1 and the tower leg 10. The design of the two sets of ground wire brackets can achieve full protection for each circuit line. When facing severe working conditions such as wind deflection and galloping, it can effectively guide the overcurrent such as lightning into the ground, reduce the risk of the line being hit by natural disasters such as lightning strikes, and enhance the safety of line operation.

[0033] S3, the first crossarm 3 and the second crossarm 4 located on the upper layer are symmetrically installed on the tower body 9. The symmetrical or asymmetrical installation ensures that the line is subjected to uniform stress.

[0034] S4, the third crossarm 7 and the fourth crossarm 8 located on the lower layer are installed symmetrically or asymmetrically on the tower body 9, such that the third crossarm 7 is located below the first crossarm 3 and the fourth crossarm 8 is located below the second crossarm 4. S5, the first voltage level line is suspended by the first crossarm 3 and the second crossarm 4 of the upper layer, and the first voltage level line is suspended by the third crossarm 7 and the fourth crossarm 8 of the lower layer. The second voltage level is equal to or lower than the first voltage level, so that the upper and lower layers of conductors form a multi-layer distribution in space, thereby realizing the three-dimensional crossing of transmission lines of different voltage levels or different circuits on the same tower.

[0035] This invention, through the interleaved distribution of four sets of crossarms across upper and lower layers, solves the problem that conventional crossing tower schemes struggle to balance safety and economy in power grid line crossing projects when the crossing angle is too small and the transmission corridor space is limited. In terms of safety, it enhances the lightning protection of the line and improves the structural reliability. Regarding transmission capacity, it enables the parallel erection of multiple circuits and multiple voltage levels, increasing transmission capacity.

[0036] Example 2: To address the limitations of existing technologies in cross-span design methods, such as limited options and adaptability to complex spaces, this invention provides a tower arrangement method to enhance the inherent safety of overhead transmission line cross-spans. This method proactively improves inherent safety and rationally utilizes space resources. By optimizing the design of the types of towers involved in the cross-span, the arrangement of tower heads, and the structural parameters of the towers, it fundamentally improves the electrical safety distance, structural stability, and risk resistance of the cross-span towers.

[0037] See Figure 1 This invention discloses a multi-layer overhead transmission line crossing tower, including a first ground wire support 1, a first ground wire hanging point 2, a first crossarm 3, a second crossarm 4, a second ground wire support 5, a second ground wire hanging point 6, a third crossarm 7, a fourth crossarm 8, a tower body 9, and a tower leg 10.

[0038] Preferably, the first ground wire bracket 1 and the second ground wire bracket 5 are located at the top and middle of the tower body 9, respectively, and are distributed symmetrically or asymmetrically to the left and right, for suspending ground wires or optical fiber composite ground wires (OPGW) to provide lightning protection and communication for the lines below.

[0039] Preferably, the first crossarm 3 and the second crossarm 4 are located below the first ground wire bracket 1, and the third crossarm 7 and the fourth crossarm 8 are located below the second ground wire bracket 5, so as to realize the parallel operation of multiple circuits and multiple voltage level lines.

[0040] Preferably, below the first ground wire bracket 1, there is a first ground wire hanging point 2 on each side, namely the first left ground wire hanging point 2-1 and the first right ground wire hanging point 2-2, which are symmetrically or asymmetrically distributed on the left and right sides, for suspending the ground wire to meet the needs of lightning protection and communication.

[0041] Preferably, below the second ground wire bracket 5, there is a second ground wire hanging point 6 on each side, namely the second left ground wire hanging point 6-1 and the second right ground wire hanging point 6-2, which are symmetrically or asymmetrically distributed on the left and right sides, used to suspend the ground wire and realize the lightning protection and communication requirements of the line below.

[0042] Preferably, the first crossarm 3 is located on the left side below the first ground wire bracket 1, and is distributed at intervals of upper, middle and lower to form a set of conductor brackets for suspending the first circuit with a higher or the same voltage level.

[0043] Preferably, the second crossarm 4 is located on the right side below the first ground wire bracket 1, and is distributed at intervals of upper, middle and lower to form a set of conductor brackets for suspending a second circuit with a higher or the same voltage level.

[0044] Preferably, the third crossarm 7 is located on the left side below the second ground wire bracket 5, and is distributed at intervals of upper, middle and lower to form a set of conductor brackets for suspending the third circuit of the same or lower voltage level.

[0045] Preferably, the fourth crossarm 8 is located on the right side below the second ground wire bracket 5, and is distributed at intervals of upper, middle and lower to form a set of conductor brackets for suspending the fourth circuit of the same or lower voltage level.

[0046] Furthermore, the tower body 9 is a steel structure and serves as the main load-bearing structure of the tower. It adopts a rectangular or square cross-section and includes the tower head, tower body 9, and tower legs 10 from top to bottom, which enhances the overall stability, wind resistance, ice resistance, and structural strength of the tower.

[0047] Furthermore, the tower leg 10 is connected to the foundation buried underground, providing a stable foundation support for the entire tower.

[0048] This invention, through the upper and lower layer spacing design of four sets of crossarms, fundamentally overcomes the problem of insufficient lateral distance when multiple circuits run parallel at small crossing angles, further improving electrical safety distances. The design of two sets of ground wire supports enables full protection for each circuit. When crossing at similar voltage levels, safety is further enhanced under severe conditions such as wind deflection and galloping. The crossarm spacing can be flexibly selected according to voltage levels; for straight-line towers, it can be 8-17 meters, and for tension towers, it can be 8.5-18 meters. Reasonable spacing settings improve the structural safety and reliability. In areas with limited corridor space, the transmission capacity is further increased when multiple circuits and multiple voltage levels run parallel. This invention has a reasonable structure, saves tower materials, and can fully utilize space resources in areas with limited corridor space, improving economic efficiency.

[0049] Example 3: like Figure 1As shown, the present invention includes a first grounding bracket 1, a first grounding point 2, a first crossarm 3, a second crossarm 4, a second grounding bracket 5, a second grounding point 6, a third crossarm 7, a fourth crossarm 8, a tower body 9, and a tower leg 10.

[0050] The first ground wire support 1 is located at the top of the tower and includes two ground wire supports: the first left ground wire support 1-1 and the first right ground wire support 1-2, which are symmetrically or asymmetrically distributed. The height design of the first left ground wire support 1-1 and the first right ground wire support 1-2 also takes into account the needs of lightning protection and ground wire suspension, ensuring the safe operation of the power grid. Different values ​​can be selected according to the differences in icing areas. For straight towers, it is possible to use, but not limited to, 3 meters, and for tension towers, it is possible to use, but not limited to, 7.5 meters. The first ground wire suspension point 2 includes the first left ground wire suspension point 2-1 and the first right ground wire suspension point 2-2, located below the first ground wire support 1, which are symmetrically or asymmetrically distributed and used to suspend the two ground wires to meet the needs of lightning protection and communication. The second ground wire support 5 is located in the middle of the tower and includes the second left ground wire support 5-1. 1. The two ground wire supports 5-2 are distributed symmetrically or asymmetrically. In this embodiment, the height of the tension tower ground wire support is 5.2 meters. Its height design also takes into account the needs of lightning protection and ground wire suspension, ensuring the safe operation of the power grid. The second ground wire suspension point 6 includes the second left ground wire suspension point 6-1 and the second right ground wire suspension point 6-2, located below the second ground wire support 5, and is distributed symmetrically or asymmetrically. It is used to suspend the two ground wires to meet the lightning protection and communication needs of the lines below. In addition, a dedicated maintenance channel is added at the end of the crossarm and on the ground wire support to facilitate construction and maintenance. The connection point between the second ground wire support and the tower body, in addition to serving as a ground wire support, can also serve as a "crossbar" and "vibration damping node", further improving the stability of the tower body.

[0051] The first crossarm 3 is located on the left side below the first ground wire support 1, and includes three crossarm assemblies: the first upper crossarm 3-1, the first middle crossarm 3-2, and the first lower crossarm 3-3. They are arranged at intervals of upper, middle, and lower to form a set of conductor supports for suspending the first circuit with a higher or the same voltage level. The second crossarm 4 is located on the right side below the first ground wire support, and includes three crossarm assemblies: the second upper crossarm 4-1, the second middle crossarm 4-2, and the second lower crossarm 4-3. They are arranged at intervals of upper, middle, and lower to form a set of conductor supports for suspending the second circuit with a higher or the same voltage level. The third crossarm 7 is located on the left side below the second ground wire bracket 5. It includes three crossarm assemblies: the third upper crossarm 7-1, the third middle crossarm 7-2, and the third lower crossarm 7-3. They are arranged at intervals of upper, middle, and lower to form a set of conductor brackets for suspending the third circuit with a lower or the same voltage level. The fourth crossarm 8 is located on the right side below the second ground wire bracket 5. It includes three crossarm assemblies: the fourth upper crossarm 8-1, the fourth middle crossarm 8-2, and the fourth lower crossarm 8-3. They are arranged at intervals of upper, middle, and lower to form a set of conductor brackets for suspending the fourth circuit with a lower or the same voltage level.

[0052] The tower body 9 is a steel structure and serves as the main load-bearing structure of the tower. It adopts a rectangular or square cross-section and includes the tower head, tower body 9, and tower legs 10 from top to bottom, which enhances the overall stability, wind resistance, ice resistance, and structural strength of the tower. The tower legs 10 are connected to the foundation buried underground, providing a stable foundation support for the entire tower.

[0053] In actual operation, the second grounding bracket 5 leads a grounding wire down from the tower body 9 through the first grounding bracket 1 to protect the conductor below. The two sets of grounding brackets share the tower body. Through the above design, the problem of parallel lines when the crossing angle is small is solved, while also saving tower materials and improving economy. It is particularly suitable for new projects and line renovations in areas with tight corridors.

[0054] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of this invention.

Claims

1. A multi-layer overhead transmission line crossing tower, comprising a fixedly connected tower body (9) and tower legs (10), characterized in that, Also includes: The first ground wire bracket (1) is fixed on the tower body (9); The second grounding bracket (5) is fixed on the tower body (9) and located between the first grounding bracket (1) and the tower leg (10); The first crossarm (3) and the second crossarm (4) are symmetrically fixed on both sides of the tower body (9); The third crossarm (7) and the fourth crossarm (8) are symmetrically fixed on both sides of the tower body (9). The third crossarm (7) is located below the first crossarm (3), and the fourth crossarm (8) is located below the second crossarm (4). Among them, the first crossarm (3), the second crossarm (4), the third crossarm (7) and the fourth crossarm (8) are all distributed in two layers at intervals.

2. The multi-layer overhead transmission line crossing tower according to claim 1, characterized in that, Both ends of the first ground wire bracket (1) and the second ground wire bracket (5) are provided with hanging points for suspending ground wires or fiber optic composite ground wires.

3. A multi-layer overhead transmission line crossing tower according to claim 2, characterized in that, The first ground wire bracket (1) includes a first left ground wire bracket (1-1) and a first right ground wire bracket (1-2). The first left ground wire bracket (1-1) and the first right ground wire bracket (1-2) have the same structure and are arranged symmetrically or asymmetrically on both sides of the tower body (9). The end of the first left ground wire bracket (1-1) away from the tower body (9) is provided with a first left ground wire hanging point (2-1), and the end of the first right ground wire bracket (1-2) away from the tower body (9) is provided with a first right ground wire hanging point (2-2). The second grounding bracket (5) includes a second left grounding bracket (5-1) and a second right grounding bracket (5-2). The second left grounding bracket (5-1) and the second right grounding bracket (5-2) have the same structure and are arranged symmetrically or asymmetrically on both sides of the tower body (9). The end of the second left grounding bracket (5-1) away from the tower body (9) is provided with a second left grounding point (6-1), and the end of the second right grounding bracket (5-2) away from the tower body (9) is provided with a second right grounding point (6-2).

4. A multi-layer overhead transmission line crossing tower according to claim 1, characterized in that, The first crossarm (3) includes a first upper crossarm (3-1), a first middle crossarm (3-2) and a first lower crossarm (3-3). The first upper crossarm (3-1), the first middle crossarm (3-2) and the first lower crossarm (3-3) are all fixedly connected to the tower body (9). The first middle crossarm (3-2) is located between the first upper crossarm (3-1) and the first lower crossarm (3-3). The second crossarm (4) includes a second upper crossarm (4-1), a second middle crossarm (4-2), and a second lower crossarm (4-3). The second upper crossarm (4-1), the second middle crossarm (4-2), and the second lower crossarm (4-3) are all fixedly connected to the tower body (9). The second middle crossarm (4-2) is located between the second upper crossarm (4-1) and the second lower crossarm (4-3). The first upper crossarm (3-1) and the second upper crossarm (4-1) are arranged symmetrically or asymmetrically; the first middle crossarm (3-2) and the second middle crossarm (4-2) are arranged symmetrically or asymmetrically; the first lower crossarm (3-3) and the second lower crossarm (4-3) are arranged symmetrically or asymmetrically.

5. A multi-layer overhead transmission line crossing tower according to claim 1, characterized in that, The third crossarm (7) includes a third upper crossarm (7-1), a third middle crossarm (7-2), and a third lower crossarm (7-3). The third upper crossarm (7-1), the third middle crossarm (7-2), and the third lower crossarm (7-3) are all fixedly connected to the tower body (9). The third middle crossarm (7-2) is located between the third upper crossarm (7-1) and the third lower crossarm (7-3). The fourth crossarm (8) includes a fourth upper crossarm (8-1), a fourth middle crossarm (8-2), and a fourth lower crossarm (8-3). The fourth upper crossarm (8-1), the fourth middle crossarm (8-2), and the fourth lower crossarm (8-3) are all fixedly connected to the tower body (9). The fourth middle crossarm (8-2) is located between the fourth upper crossarm (8-1) and the fourth lower crossarm (8-3). The third upper crossarm (7-1) and the fourth upper crossarm (8-1) are arranged symmetrically or asymmetrically; the third middle crossarm (7-2) and the fourth middle crossarm (8-2) are arranged symmetrically or asymmetrically; the third lower crossarm (7-3) and the fourth lower crossarm (8-3) are arranged symmetrically or asymmetrically.

6. A multi-layer overhead transmission line crossing tower according to claim 1, characterized in that, The tower body (9) is made of steel and has a rectangular or square cross-section.

7. A multi-layer overhead transmission line crossing tower according to claim 1, characterized in that, The lines suspended by the first crossarm (3) and the second crossarm (4) are of the first voltage level, and the lines suspended by the third crossarm (7) and the fourth crossarm (8) are of the second voltage level, which is equal to or lower than the first voltage level.

8. A multi-layer overhead transmission line crossing tower according to claim 1, characterized in that, The first crossarm (3) and the third crossarm (7) are arranged on the same side, and the second crossarm (4) and the fourth crossarm (8) are arranged on the same side.

9. A multi-layer overhead transmission line crossing tower according to claim 1, characterized in that, Maintenance channels are provided on the first grounding bracket (1), the second grounding bracket (5), the first crossarm (3), the second crossarm (4), the third crossarm (7), and the fourth crossarm (8).

10. A method for crossing power lines using multi-layer overhead transmission line crossing towers as described in any one of claims 1 to 9, characterized in that, Includes the following steps: The tower body (9) is fixed to the ground by the tower legs (10); A first ground wire bracket (1) and a second ground wire bracket (5) are fixedly installed on the upper part of the tower body (9), and the second ground wire bracket (5) is located between the first ground wire bracket (1) and the tower leg (10); The first crossarm (3) and the second crossarm (4) located on the upper layer are installed symmetrically or asymmetrically on the tower body (9); The third crossarm (7) and the fourth crossarm (8) located on the lower layer are installed symmetrically or asymmetrically on the tower body (9), such that the third crossarm (7) is located below the first crossarm (3) and the fourth crossarm (8) is located below the second crossarm (4); The first voltage level line is suspended by the first crossarm (3) and the second crossarm (4) of the upper layer, and the first voltage level line is suspended by the third crossarm (7) and the fourth crossarm (8) of the lower layer. The second voltage level is equal to or lower than the first voltage level.

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