Linear drilling and crossing tower shared by three-circuit 500kV lines

Abstract

The invention relates to the technical field of tower bodies, and discloses a three-circuit 500kV line common straight line drilling and crossing tower which comprises a tower body, and the tower body comprises a ground wire assembly, an upper layer wire assembly and a lower layer wire assembly which are sequentially distributed from top to bottom; the upper-layer wire assembly comprises a plurality of upper-layer tower windows and a first cross arm bracket for fixing the upper-layer tower windows, each upper-layer tower window is arranged below the first cross arm bracket, a first wire suspension point is arranged at the end part of each upper-layer tower window, and the plurality of upper-layer tower windows are arranged on the same horizontal line; the lower-layer wire assembly comprises a plurality of lower-layer tower windows and a second cross arm support used for fixing the lower-layer tower windows, each lower-layer tower window is arranged below the second cross arm support, a second wire suspension point is arranged at the end part of each lower-layer tower window, and the plurality of lower-layer tower windows are arranged on the same horizontal line; wherein the plurality of upper-layer tower windows and the plurality of lower-layer tower windows form three loops of three-phase wires.

Description

Technical Field

[0001] The invention relates to the technical field of tower bodies, in particular to a straight-line drilling tower for three 500kV lines sharing a common tower. Background Art

[0002] With the increasing number of ultra-high voltage lines in South China, the phenomenon of cross-drilling between newly built ultra-high voltage lines and ultra-high voltage lines on straight drilling towers has gradually increased. In most cases, there is no drilling channel reserved for the newly built ultra-high voltage lines on the existing straight drilling towers.

[0003] At present, most of the existing straight drilling towers are single-circuit lines and double-circuit lines. When installing ultra-high voltage lines on this type of straight drilling towers, the methods adopted are to build new lines to bypass, upgrade and transform high-level lines, or partially convert multiple circuits of new lines into single circuits. Building new lines to bypass will increase investment and it is more difficult to find drilling points; upgrading and transforming high-level lines will cause longer power outages. On the one hand, the cost of high-voltage level line transformation is high, and on the other hand, it has a greater impact on the entire power grid as a whole; building new lines with multiple circuits partially converted into single circuits will increase the width of the line corridor, increase the construction period and line investment costs. Summary of the invention

[0004] The technical problem to be solved by the present invention is that in the prior art, the installation of ultra-high voltage lines on single-circuit and double-circuit straight-line drilling towers has great construction difficulty, long construction period and high construction cost.

[0005] In order to solve the above technical problems, the present invention provides a straight-line drilling tower for three 500kV lines sharing a tower, which comprises a tower body and a ground wire assembly, an upper conductor assembly and a lower conductor assembly arranged on the tower body in sequence from top to bottom; the ground wire assembly is arranged above the tower body; the upper conductor assembly comprises a plurality of upper tower windows and a first cross arm bracket for fixing the upper tower windows, each upper tower window is arranged below the first cross arm bracket, and a first conductor hanging point is arranged at the end of each upper tower window, and the plurality of upper tower windows are arranged on the same horizontal line, wherein two adjacent upper tower windows are arranged on the same horizontal line. The tower window is arranged inside the tower body, and other upper tower windows are respectively arranged at both ends of the tower body; the lower conductor assembly includes multiple lower tower windows and a second cross arm bracket for fixing the lower tower windows, each lower tower window is arranged below the second cross arm bracket, and a second conductor hanging point is arranged at the end of each lower tower window, and multiple lower tower windows are arranged on the same horizontal line, among which the lower tower window located in the middle is arranged on the inner wall of the tower body, and other lower tower windows are adjacent to each other and respectively arranged at both ends of the tower body; wherein, multiple upper tower windows and multiple lower tower windows form three three-phase conductor loops.

[0006] In one embodiment, the ground wire assembly includes two ground wire supports arranged opposite to each other, and the ground wire supports are respectively arranged at two ends of the tower body.

[0007] In one embodiment, each ground wire bracket is provided with a ground wire hanging point for hanging the ground wire.

[0008] In one embodiment, each upper tower window includes two first insulating suspension sub-strings, one end of the two first insulating suspension sub-strings are interconnected, and the other end is connected to the first cross arm bracket, and the first wire suspension point is arranged at the interconnected end of the two first insulating suspension sub-strings.

[0009] In one embodiment, the tower body includes a first reinforcing rib, which is respectively arranged at two ends of the tower body, and one end of the first reinforcing rib is connected to the tower body, and the other end is connected to the first cross arm bracket.

[0010] In one embodiment, each lower tower window includes two second insulating suspension sub-strings, one end of the two second insulating suspension sub-strings are connected to each other, and the other end is connected to the second cross arm bracket, and the second wire suspension point is arranged at the interconnected end of the two second insulating suspension sub-strings.

[0011] In one embodiment, the tower body includes a second reinforcing rib, which is respectively arranged at both ends of the tower body and below the first reinforcing rib, with one end of the second reinforcing rib connected to the tower body and the other end connected to the second cross arm bracket.

[0012] In one embodiment, the tower body further includes a tower leg and two third reinforcing ribs, the two third reinforcing ribs are arranged crosswise with each other, and one end of each third reinforcing rib is connected to the second reinforcing rib, and the other end is connected to the tower leg.

[0013] In one embodiment, the tower body is a wine glass type linear tower.

[0014] Compared with the prior art, the straight-line drilling tower for three 500kV lines on a common tower according to the embodiment of the present invention has the following beneficial effects: 1) a ground wire assembly is arranged at the top of the tower body and is used to suspend the ground wire, which is mainly used for lightning protection and protecting the wire from natural factors such as lightning; 2) an upper conductor assembly is arranged below the ground wire assembly, and the upper conductor assembly includes a first cross arm bracket and a plurality of upper tower windows, the first cross arm bracket is used to fix and support the structure of the upper tower window, the number of the upper tower windows is at least four, and a bracket for suspending the wire is provided below each tower window. The first wire hanging point, the four upper tower windows are located on the same horizontal line, two of which are located inside the tower body, and the other two are located at both ends of the tower body. This design ensures that the upper wire assembly can install four-phase wires; 3) The lower wire assembly is arranged below the upper wire assembly, and the lower wire assembly includes a second cross arm bracket and a plurality of lower tower windows. The second cross arm bracket is used to fix and support the structure of the lower tower window. The number of the lower tower windows is at least five, and a second wire hanging point for hanging wires is provided below each tower window. The five lower tower windows are also located on the same horizontal line, one of which is located in the middle of the tower body, and the other four lower tower windows are adjacent to each other at both ends of the tower body. This design ensures that the lower wire assembly can install five-phase wires; through the carefully designed layout of at least four upper tower windows and at least five lower tower windows. The present invention realizes three three-phase wire loops. This means that on the same straight drilling tower, three independent 500kV power lines can be efficiently transmitted. According to the current conventional tower-type three-circuit 500kV lines, one single circuit and one double circuit are required for routing, and a total corridor width of 96m is required. The present invention concentrates the three 500kV circuits on the upper conductor assembly and the lower conductor assembly, so that the width of the tower corridor is reduced to 56.2m, thereby greatly saving space and resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of a straight-line tower drilling system for three 500kV lines sharing a tower according to an embodiment of the present invention.

[0016] Figure 2 It is a schematic diagram of the structure of the tower body reinforcement component of the straight-line drilling tower for three 500kV lines sharing a tower according to an embodiment of the present invention.

[0017] In the figure, 1. ground wire assembly; 11. ground wire bracket; 12. ground wire hanging point; 2. upper conductor assembly; 21. first cross arm bracket; 22. upper tower window; 221. first insulating suspension substring; 23. first conductor hanging point; 3. lower conductor assembly; 31. second cross arm bracket; 32. lower tower window; 321. second insulating suspension substring; 33. second conductor hanging point; 100. tower body; 101. first reinforcement rib; 102. second reinforcement rib; 103. third reinforcement rib; 104. tower leg. DETAILED DESCRIPTION

[0018] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0019] In the description of the present invention, it should be understood that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0020] In the description of the present invention, it should be understood that the terms "height", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present invention, it should be understood that the terms "ground" and "upper layer" are used in the present invention for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "ground" and "upper layer" may explicitly or implicitly include one or more of the features.

[0022] like Figure 1 to Figure 2As shown, the embodiment of the present invention preferably provides a three-circuit 500kV line common tower straight drilling tower, which includes a tower body 100 and a ground wire assembly 1, an upper conductor assembly 2 and a lower conductor assembly 3 arranged on the tower body 100 from top to bottom; the ground wire assembly 1 is arranged above the tower body 100; the upper conductor assembly 2 includes a plurality of upper tower windows 22 and a first cross arm bracket 21 for fixing the upper tower windows 22, each upper tower window 22 is arranged below the first cross arm bracket 21, and a first conductor suspension point 23 is arranged at the end of each upper tower window 22, and the plurality of upper tower windows 22 are arranged on the same horizontal line, wherein two adjacent upper tower windows 22 are arranged at Inside the tower body 100, other upper tower windows 22 are respectively arranged at both ends of the tower body 100; the lower conductor assembly 3 includes multiple lower tower windows 32 and a second cross arm bracket 31 for fixing the lower tower windows 32, each lower tower window 32 is arranged below the second cross arm bracket 31, and a second conductor hanging point 33 is arranged at the end of each lower tower window 32, and multiple lower tower windows 32 are arranged on the same horizontal line, among which the lower tower window 32 located in the middle is arranged on the inner wall of the tower body 100, and the other lower tower windows 32 are adjacent to each other and are respectively arranged at both ends of the tower body 100; wherein, the multiple upper tower windows 22 and the multiple lower tower windows 32 form three three-phase conductor loops.

[0023] Based on the above technical features, the present invention uses a ground wire assembly 1, which is arranged at the top of the tower body 100 for hanging the ground wire, which is mainly used for lightning protection and protecting the wire from natural factors such as lightning; an upper wire assembly 2 is arranged below the ground wire assembly 1, and the upper wire assembly 2 includes a first cross arm bracket 21 and an upper tower window 22. The first cross arm bracket 21 is used to fix and support the structure of the upper tower window 22. The number of upper tower windows 22 is at least four, and a first wire hanging point 23 for hanging the wire is provided below each tower window. The four upper tower windows 22 are located at the same On a horizontal line, two upper tower windows 22 are located inside the tower body 100, and the other two upper tower windows 22 are located at both ends of the tower body 100, respectively. This design ensures that the upper conductor assembly 2 can install four-phase conductors; through the lower conductor assembly 3, it is arranged below the upper conductor assembly 2, and the lower conductor assembly 3 includes a second cross arm bracket 31 and a lower tower window 32. The second cross arm bracket 31 is used to fix and support the structure of the lower tower window 32. The number of the lower tower windows 32 is at least five, and a second conductor suspension point 33 for suspending the conductor is provided below each tower window. These five lower tower windows 32 are also located on the same horizontal line, one of the lower tower windows 32 is located in the middle of the tower body 100, and the remaining lower tower windows 32 are located adjacent to each other at both ends of the tower body 100, respectively. This design ensures that the lower conductor assembly 3 can install five-phase conductors.

[0024] Furthermore, the number of upper tower windows 22 of the present invention is at least four, and the number of lower tower windows 32 is at least five. Through the carefully designed layout of the four upper tower windows and the five lower tower windows, the present invention realizes three three-phase conductor loops. This means that three independent 500kV power lines can be efficiently transmitted on the same straight drilling tower, thereby greatly saving space and resources.

[0025] As some embodiments of the present invention, Figure 1 As shown, the ground wire assembly 1 includes two ground wire brackets 11 arranged opposite to each other, and the ground wire brackets 11 are respectively arranged at both ends of the tower body 100. The ground wire brackets 11 provide additional lightning protection for the tower body 100 by connecting the ground wire. In thunderstorm weather, the ground wire can guide the lightning current to flow safely into the earth, thereby avoiding direct damage to the tower body 100 and the conductor by lightning.

[0026] As some embodiments of the present invention, Figure 1 As shown, each ground wire bracket 11 is provided with a ground wire hanging point 12 for hanging a ground wire. The ground wire bracket 11 is designed with a hanging point specifically for hanging a ground wire to ensure that the ground wire can be firmly fixed on the bracket to form a safe and reliable grounding system. Such a design is of great significance for ensuring the safe and stable operation of the electrical system.

[0027] As some embodiments of the present invention, Figure 1 As shown, each upper tower window 22 includes two first insulating suspension substrings 221, one end of the two first insulating suspension substrings 221 is connected to each other, and the other end is connected to the first cross arm bracket 21, and the first wire suspension point 23 is set at the mutually connected end of the two first insulating suspension substrings 221. One end of the two first insulating suspension substrings 221 is connected to each other, and this connection method is designed to be very strong to ensure that when the wire is subjected to tension, the two first insulating suspension substrings 221 can share the force together to avoid excessive force on a single point causing breakage, which effectively improves the structural stability of the upper tower window 22.

[0028] As some embodiments of the present invention, Figure 1 to Figure 2 As shown, the tower body 100 includes a first reinforcing rib 101, which is respectively arranged at both ends of the tower body 100, and one end of the first reinforcing rib 101 is connected to the tower body 100, and the other end is connected to the first cross arm bracket 21. Through the arrangement of the first reinforcing rib 101, the first reinforcing rib 101, the tower body 100 and the first cross arm bracket 21 form a stable triangular support system, which is very stable in mechanics and helps to improve the overall stability of the tower body 100.

[0029] As some embodiments of the present invention, Figure 1As shown, each lower tower window 32 includes two second insulating suspension substrings 321, one end of the two second insulating suspension substrings 321 is connected to each other, and the other end is connected to the second cross arm bracket 31, and the second conductor suspension point 33 is arranged at the mutually connected end of the two second insulating suspension substrings 321. The other ends of the two second insulating suspension substrings 321 are respectively connected to the second cross arm bracket 31. The second cross arm bracket 31 serves as a supporting structure of the lower layer of the tower body 100, providing a stable supporting point so that the insulating suspension substrings and the lower layer conductors can be firmly suspended on the tower body 100. At the same time, the second conductor suspension point 33 is arranged at the second conductor suspension point 33 of the mutually connected end of the two second insulating suspension substrings 321. This suspension point is the key connection point between the lower layer conductor and the tower body 100, which is responsible for transmitting the tension of the lower layer conductor to the second insulating suspension substring 321 and the second cross arm bracket 31, thereby ensuring the stability and safety of the entire structure.

[0030] As some embodiments of the present invention, Figure 1 to Figure 2 As shown, the tower body 100 includes a second reinforcing rib 102, which is respectively arranged at both ends of the inside of the tower body 100, and the second reinforcing rib 102 is arranged below the first reinforcing rib 101, one end of the second reinforcing rib 102 is connected to the tower body 100, and the other end is connected to the second cross arm bracket 31. One end of the second reinforcing rib 102 is connected to the tower body 100, and the other end of the second reinforcing rib 102 is connected to the second cross arm bracket 31. The second cross arm bracket 31 is an important component on the tower body 100 for supporting the lower layer of conductors, and the connection between the second reinforcing rib 102 and the second cross arm bracket 31 further enhances the supporting capacity of the tower body 100 for the lower layer structure. By adding the second reinforcing rib 102, the overall stability of the tower body 100 is significantly improved. Under extreme weather conditions, the tower body 100 can remain stable and reduce deformation and vibration caused by external loads.

[0031] As some embodiments of the present invention, Figure 1 to Figure 2As shown, the tower body 100 also includes a tower leg 104 and two third reinforcing ribs 103, the two third reinforcing ribs 103 are arranged crosswise, and one end of each third reinforcing rib 103 is connected to the second reinforcing rib 102, and the other end is connected to the tower leg 104. The tower leg 104 is an important supporting structure of the tower body 100. It is located at the bottom of the tower body 100 and is responsible for transferring the weight of the tower body 100 and the external load it bears to the ground. The tower leg 104 is designed to be very strong to ensure that the tower body 100 can remain stable under various weather and environmental conditions. Two third reinforcing ribs 103 are arranged in the tower body 100, and the two reinforcing ribs are arranged crosswise to form a stable supporting structure. At the same time, one end of each third reinforcing rib 103 is connected to the second reinforcing rib 102, and the other end is connected to the tower leg 104. This connection method ensures that the third reinforcing rib 103 can effectively transfer the load borne by the second reinforcing rib 102 to the tower leg 104, thereby further enhancing the overall stability of the tower body 100.

[0032] As some embodiments of the present invention, the tower body 100 is a wine glass type straight tower, and the main function of the wine glass type straight tower is to bear the tension of the conductor. In the transmission line, the conductor will generate a certain tension due to factors such as its own weight and wind pressure, and the straight tower can withstand this tension through its solid structure and strong bearing capacity to ensure the stable operation of the conductor line.

[0033] In summary, the embodiment of the present invention provides a straight-line drilling tower for three 500kV lines on a common tower, and compared with the prior art, its beneficial effects are: 1) a ground wire assembly 1, which is arranged at the top of the tower body 100 and is used to suspend the ground wire, which is mainly used for lightning protection and protecting the wire from natural factors such as lightning; 2) an upper conductor assembly 2, which is arranged below the ground wire assembly 1, and the upper conductor assembly 2 includes a first cross arm bracket 21 and an upper tower window 22, the first cross arm bracket 21 is used to fix and support the structure of the upper tower window 22, the number of the upper tower windows 22 is at least four, and a first conductor for suspending the wire is provided below each tower window The four upper tower windows 22 are located on the same horizontal line, two of which are located inside the tower body 100, and the other two are located at both ends of the tower body 100. This design ensures that the upper conductor assembly 2 can install four-phase conductors; 3) The lower conductor assembly 3 is arranged below the upper conductor assembly 2. The lower conductor assembly 3 includes a second cross arm bracket 31 and a lower tower window 32. The second cross arm bracket 31 is used to fix and support the structure of the lower tower window 32. The number of the lower tower windows 32 is at least five, and a second wire suspension point 33 for hanging wires is provided below each tower window. The five lower tower windows 32 are also located on the same horizontal line, one of which is located in the middle of the tower body 100, and the other four lower tower windows 32 are located adjacent to each other at both ends of the tower body 100. This design ensures that the lower conductor assembly 3 can install five-phase conductors; through the carefully designed layout of the four upper tower windows and the five lower tower windows. The present invention realizes three three-phase conductor loops. This means that on the same straight drilling tower, three independent 500kV power lines can be efficiently transmitted. According to the current conventional tower-type three-circuit 500kV lines, one single circuit and one double circuit are required for routing, and a total corridor width of 96m is required. The present invention concentrates the three 500kV circuits on the upper conductor assembly 2 and the lower conductor assembly 3, so that the corridor width of the tower body 100 is reduced to 56.2m, thereby greatly saving space and resources.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A straight-line tower drilling system for three 500kV lines sharing a tower, characterized in that: It comprises a tower body and a ground wire assembly, an upper conductor assembly and a lower conductor assembly which are sequentially arranged on the tower body from top to bottom; The ground wire assembly is arranged above the tower body; The upper conductor assembly includes a plurality of upper tower windows and a first cross arm bracket for fixing the upper tower windows, each of the upper tower windows is arranged below the first cross arm bracket, and a first conductor hanging point is arranged at the end of each upper tower window, and the plurality of upper tower windows are arranged on the same horizontal line, wherein two adjacent upper tower windows are arranged inside the tower body, and the other upper tower windows are respectively arranged at both ends of the tower body; The lower layer conductor assembly includes a plurality of lower layer tower windows and a second cross arm bracket for fixing the lower layer tower windows, each of the lower layer tower windows is arranged below the second cross arm bracket, and a second conductor suspension point is arranged at the end of each lower layer tower window, and the plurality of lower layer tower windows are arranged on the same horizontal line, wherein the lower layer tower window located in the middle is arranged on the inner wall of the tower body, and the other lower layer tower windows are arranged adjacent to each other at two ends of the tower body respectively; Wherein, the plurality of upper tower windows and the plurality of lower tower windows form three three-phase conductor loops.

2. According to claim 1, the straight-line tower drilling method for three 500kV lines sharing a tower is characterized in that: The ground wire assembly comprises two ground wire supports arranged opposite to each other, and the ground wire supports are respectively arranged at two ends of the tower body.

3. According to claim 2, the straight-line tower drilling method for three 500kV lines sharing a tower is characterized in that: Each of the ground wire brackets is provided with a ground wire hanging point for hanging a ground wire.

4. According to claim 1, the straight-line tower drilling method for three 500kV lines sharing a tower is characterized in that: Each of the upper tower windows includes two first insulating suspension sub-strings, one end of the two first insulating suspension sub-strings are connected to each other, and the other end is connected to the first cross arm bracket, and the first wire suspension point is arranged at the interconnected end of the two first insulating suspension sub-strings.

5. The straight-line tower drilling method for three 500kV lines sharing a tower according to claim 4 is characterized in that: The tower body includes a first reinforcing rib, which is respectively arranged at two ends of the tower body, and one end of the first reinforcing rib is connected to the tower body, and the other end is connected to the first cross arm bracket.

6. The straight-line tower drilling method for three 500kV lines sharing a tower according to claim 5 is characterized in that: Each of the lower tower windows includes two second insulating suspension sub-strings, one end of the two second insulating suspension sub-strings are connected to each other, and the other end is connected to the second cross arm bracket, and the second wire suspension point is arranged at the interconnected end of the two second insulating suspension sub-strings.

7. The straight-line tower drilling method for three 500kV lines sharing a tower according to claim 6 is characterized in that: The tower body includes a second reinforcing rib, which is respectively arranged at two ends of the tower body and below the first reinforcing rib. One end of the second reinforcing rib is connected to the tower body, and the other end is connected to the second cross arm bracket.

8. The straight-line tower drilling method for three 500kV lines sharing a tower according to claim 7 is characterized in that: The tower body also includes a tower leg and two third reinforcing ribs. The two third reinforcing ribs are arranged crosswise with each other, and one end of each third reinforcing rib is connected to the second reinforcing rib, and the other end is connected to the tower leg.

9. The straight-line tower drilling method for three 500kV lines sharing a tower according to claim 1 is characterized in that: The tower body is a wine glass-shaped straight tower.

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