110kV double circuit cable terminal pole

Abstract

This utility model discloses a 110kV double-circuit cable terminal pole, including a pole body with overhead lines on both sides; a crossarm assembly, located on the pole body between the two overhead lines, comprising an upper crossarm, a middle crossarm, and a lower crossarm arranged sequentially from top to bottom on the pole body, wherein the lengths of the upper, middle, and lower crossarms increase progressively; and a cable platform, located on the pole body, on which several surge arresters are installed, wherein the conductors led out from the upper, middle, and lower crossarms can be directly pulled down to the corresponding surge arresters. Through the progressively increasing crossarm length design and the cable platform layout, the conductors can be directly pulled down to the surge arresters without jumpers, effectively solving the technical problem of insufficient distance between lines when double-sided overhead lines are installed. It has the advantages of realizing double-circuit double-sided overhead lines, avoiding electrical safety risks, and improving the flexibility and reliability of the power grid. It also features a compact structure, safe lead wires, convenient construction, and high economic efficiency.

Description

Technical Field

[0001] This utility model relates to the field of power transmission equipment technology, and in particular to a 110kV double-circuit cable terminal pole. Background Technology

[0002] In existing 110kV power systems, cable terminals on steel pipe poles generally operate using a single-sided overhead line configuration. Specifically, the upper phase conductor must be led down from the un-strung side via a jumper, the middle phase conductor is led down from the outside of the crossarm via a jumper, and the lower phase conductor is led down directly from the overhead side. This structural design means that when a double-circuit double-sided overhead line is required, the upper phase conductor cannot be led down from the overhead side due to insufficient distance between conductors, which can easily lead to electrical safety risks such as short circuits or discharges. If conductors are forcibly installed on both sides, the existing jumper method cannot be used to lead the conductors, resulting in limited line layout and affecting the flexibility and reliability of the power grid. Existing technology has failed to provide a terminal structure suitable for double-sided overhead lines, making double-circuit cable terminals face operational difficulties and safety hazards in high-voltage transmission scenarios. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides a 110kV double-circuit cable terminal pole.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A 110kV double-circuit cable terminal pole includes:

[0006] The pole has overhead lines on both sides.

[0007] A crossarm assembly, located on the pole and between the two overhead lines, includes an upper crossarm, a middle crossarm, and a lower crossarm arranged sequentially from top to bottom on the pole, wherein the lengths of the upper crossarm, the middle crossarm, and the lower crossarm increase sequentially.

[0008] A cable platform is installed on the pole and located at the lower end of the lower crossarm. Several surge arresters are installed on it. The conductors led out from the upper crossarm, middle crossarm and lower crossarm can be directly pulled down and connected to the corresponding surge arresters.

[0009] As described above, a 110kV double-circuit cable terminal pole has several crossarm-type composite insulators on both the middle crossarm and the lower crossarm, allowing the conductors to pass through.

[0010] As described above, in a 110kV double-circuit cable terminal pole, the lower end of the cable platform is provided with several cables for grounding, and each of the cables is connected to the surge arrester.

[0011] As described above, a 110kV double-circuit cable terminal pole is further provided with a plurality of single-core cable clamps for fixing the cable.

[0012] As described above, in a 110kV double-circuit cable terminal pole, the grounding end of the cable is also wrapped with a cable protection pipe.

[0013] The 110kV double-circuit cable terminal pole described above, wherein the cable is a 110kV cable.

[0014] As described above, a 110kV double-circuit cable terminal pole includes a cable platform comprising a fixed collar fixedly sleeved on the pole body and several connecting base plates connected to one side of the fixed collar, with multiple surge arresters respectively connected to the connecting base plates.

[0015] As described above, a 110kV double-circuit cable terminal pole has two connecting base plates, which are respectively connected to the fixing collar and located on both sides of the pole body.

[0016] The beneficial effects of this utility model are: the structure of this application is simple. Through the design of gradually increasing crossarm length and cable platform layout, the conductor can be directly pulled down to the surge arrester without jumper wires. This effectively solves the technical problem of insufficient distance between lines when double-sided wiring is used. It has the advantages of realizing double-circuit double-sided wiring, avoiding electrical safety risks, and improving the flexibility and reliability of the power grid. It has a compact structure, safe lead wires, convenient construction, and high economic efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is one of the structural schematic diagrams (front view) of a 110kV double-circuit cable terminal pole according to an embodiment of this utility model.

[0019] Figure 2 This is the second structural schematic diagram (right view) of a 110kV double-circuit cable terminal pole according to an embodiment of this utility model.

[0020] Figure 3 This is the third (left view) structural schematic diagram of a 110kV double-circuit cable terminal pole according to an embodiment of this utility model.

[0021] Figure 4 This is a schematic diagram of the cable platform described in an embodiment of the present invention. Detailed Implementation

[0022] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0023] Please see Figures 1 to 4 As shown, this application embodiment provides a 110kV double-circuit cable terminal pole, including:

[0024] The pole 1 has overhead lines 100 on both sides;

[0025] A crossarm assembly, located on the pole 1 and between the two overhead lines 100, includes an upper crossarm 2, a middle crossarm 3, and a lower crossarm 4 arranged sequentially from top to bottom on the pole 1, wherein the length values ​​of the upper crossarm 2, the middle crossarm 3, and the lower crossarm 4 increase sequentially.

[0026] The cable platform 5 is located on the pole 1 and at the lower end of the lower crossarm 4. Several surge arresters 6 are installed on it. The conductors 101 led out from the upper crossarm 2, the middle crossarm 3 and the lower crossarm 4 can be directly pulled down and connected to the corresponding surge arresters 6.

[0027] Specifically, pole body 1, as the main structure of the pole, is mainly used to support and fix other components on the pole, such as crossarm assembly, cable platform 5, etc.

[0028] Overhead line 100 refers to the power transmission line conductors erected on both sides of the pole for transmitting electrical energy.

[0029] A crossarm assembly, a combination of multiple crossarms, is primarily used to support and secure conductors of different phases, maintaining a safe distance between them. The crossarm assembly is designed to support and secure the conductors and is positioned between two overhead lines 100, preventing interference with the existing overhead lines 100. The lengths of the upper crossarm 2, middle crossarm 3, and lower crossarm 4 increase sequentially. For example, the upper crossarm 2 can be relatively short, the middle crossarm 3 is slightly longer than the upper crossarm 2, and the lower crossarm 4 is the longest. This stepped length design aims to provide greater arrangement space for conductors of different phases drawn from different heights, thereby ensuring sufficient safe distance between conductors and avoiding insufficient inter-line spacing.

[0030] Cable platform 5, a platform structure located at the lower part of pole 1, is mainly used for installing power equipment such as surge arresters. Surge arrester 6 is a device used to protect power equipment from lightning overvoltage damage, typically connected between the conductor and ground. The cable platform 5 is designed to provide an installation location for surge arrester 6, placing it below the lower crossarm 4 and providing ample space for conductor downlink connection. Surge arrester 6 protects power equipment from lightning overvoltage damage. Conductors 101 leading from the upper crossarm 2, middle crossarm 3, and lower crossarm 4 can be directly pulled down to the corresponding surge arrester 6. When conductor 101 is led down from the crossarm, it can be fixed and guided using insulator strings or lead clamps to ensure a smooth path and direct connection to the terminals of surge arrester 6. This direct downlink connection method simplifies the lead-in process, avoids the need to change the lead side using jumpers in traditional solutions, and improves lead-in efficiency and construction convenience.

[0031] By installing overhead lines 100 on both sides of pole 1 and using crossarms of progressively increasing length, the path for conductor 101 is arranged between the two overhead lines 100, effectively solving the problems of insufficient conductor lead-in and inadequate distance between lines when overhead conductors are installed on both sides of a 110kV double-circuit cable terminal pole. This allows conductor 101 to be directly pulled down to the surge arrester 6 without the need for jumpers or side changes, improving lead-in efficiency and safety, and broadening the application range of double-circuit cable terminal poles.

[0032] Furthermore, both the middle crossarm 3 and the lower crossarm 4 are provided with several crossarm-type composite insulators 7 that allow the conductor 101 to pass through.

[0033] The installation of crossarm-type composite insulators 7 on the middle crossarm 3 and lower crossarm 4, allowing conductor 101 to pass through, effectively solves the displacement problem that may occur during the pull-down process of conductor 101 and ensures the insulation isolation between conductor 101 and the crossarm. Given that the upper crossarm 2 is positioned higher, and conductor 101 at the middle crossarm 3 and lower crossarm 4 is more prone to swinging and shifting after pull-down, the installation of crossarm-type composite insulators 7 at these two positions effectively adapts to the layout where the crossarm length increases progressively from top to bottom, ensuring that conductor 101 maintains the correct orientation and meets the requirements for connecting the corresponding surge arrester 6 during pull-down. The stable and excellent insulation performance provided by the crossarm-type composite insulator 7 itself prevents discharge faults between conductor 101 and the crossarm, ensuring power supply safety. Simultaneously, its structure allowing conductor 101 to pass through directly limits the position of conductor 101, preventing it from swaying arbitrarily due to external forces, thereby maintaining a safe distance between different conductors 101 and effectively avoiding various faults caused by insufficient line spacing. This allows the pole structure of this application to be adapted to a double-circuit line layout with overhead lines 100 on both sides, meeting the stringent requirements for lead wire installation.

[0034] Furthermore, the lower end of the cable platform 5 is provided with several cables 102 for grounding, and the multiple cables 102 are respectively connected to the surge arrester 6.

[0035] By routing the grounding cable 102 from the lower end of the cable platform 5, and leveraging the position of the cable platform 5 at the lower end of the lower crossarm 4, the grounding cable 102 can effectively avoid the wiring area of ​​the conductors 101 on the upper crossarms. This avoids occupying the space for the upper conductors 101 and does not interfere with the path of the conductors 101 from the upper crossarm 2, middle crossarm 3, and lower crossarm 4 connected to the surge arrester 6. This ensures sufficient safety distance between each conductor 101, making it suitable for scenarios where overhead lines 100 are installed on both sides of the pole 1, effectively avoiding the problem of insufficient distance between lines. Simultaneously, connecting multiple cables 102 to the surge arresters 6 respectively allows each surge arrester 6 to have an independent grounding circuit, ensuring reliable grounding and stable lightning protection for each arrester 6. Furthermore, the independent wiring method makes the overall wiring clearer and more organized, facilitating later inspection and maintenance and reducing the difficulty of troubleshooting.

[0036] Furthermore, the rod body 1 is also provided with a plurality of single-core cable clamps 8 for fixing the cable 102.

[0037] Multiple single-core cable clamps 8 are arranged along the lead-out direction of the cable 102 on the pole 1 to independently and multi-point fix the grounding cable 102 leading from the cable platform 5. This fixing method effectively solves the problem of swaying and displacement of the cable 102 caused by external forces such as wind in outdoor environments, thereby avoiding the cable 102 pulling on the connection part of the surge arrester 6, ensuring the stability of the connection and preventing loosening. At the same time, the single-core cable clamps 8 fix each cable 102 individually, effectively preventing multiple cables 102 from approaching, rubbing, or even tangling with each other, thereby maintaining the insulation performance of the line and improving operational safety. In addition, the independent fixing method ensures that the fixing status of other cables 102 will not be affected when repairing or replacing one cable 102, greatly facilitating subsequent maintenance work. The single-core cable clamps 8 are set up based on the load-bearing structural strength of the pole 1 itself, without the need for additional load-bearing structures, simplifying the overall structure and without increasing the load burden on the pole. The arrangement of multiple single-core cable clamps 8 ensures that the cable 102 maintains a straight and orderly routing along the pole 1, preventing the cable 102 from sag or shifting in position, thus improving the overall aesthetics and reliability.

[0038] Furthermore, the grounding end of the cable 102 is also wrapped with a cable protection tube 103.

[0039] As a physical barrier, the cable protection conduit 103 effectively isolates the grounding terminal of the cable 102 from the external environment, thus preventing corrosion of the cable 102 by moisture, dust, chemicals, etc., significantly extending the service life of the cable 102 and ensuring the long-term reliability of the grounding connection. Simultaneously, the cable protection conduit 103 buffers and resists the direct action of external mechanical forces, preventing damage to the cable 102 due to scratches, collisions, or animal bites, ensuring the integrity and stability of the grounding circuit. Furthermore, the encased cable protection conduit 103 effectively prevents unauthorized personnel or objects from accidentally touching the grounding terminal of the cable 102, further enhancing the overall safety of the pole structure.

[0040] Specifically, in this embodiment, the cable 102 is a 110kV cable.

[0041] Furthermore, the cable platform 5 includes a fixing collar 51 fixedly sleeved on the rod body 1, and a plurality of connecting base plates 52 connected to one side of the fixing collar 51, and a plurality of surge arresters 6 are respectively connected to the connecting base plates 52.

[0042] The installation method, which uses a fixing collar 51 fitted onto the pole body 1, eliminates the need for complex drilling modifications to the pole body 1, allowing for a quick and easy connection between the cable platform 5 and the pole body 1. This ensures connection stability and prevents displacement or loosening of the cable platform 5 during use. A connecting base plate 52 is set up using the fixing collar 51 as the connection foundation. The connecting base plate 52 extends beyond the pole body 1 via the fixing collar 51, providing a stable and independent installation position for the surge arresters 6 without compromising the structural strength of the pole body 1, thus ensuring its structural safety. Multiple surge arresters 6 are respectively installed on different connecting base plates 52. This ensures sufficient safety spacing between each surge arrester 6 and facilitates the connection of the conductors 101 leading from each crossarm to the corresponding surge arrester 6, improving the convenience of wiring operations and ensuring the overall safety of the pole's operation. This results in a simple and easy-to-install overall structure that meets the requirements for long-term stable operation of the pole.

[0043] Furthermore, there are two connecting base plates 52, which are respectively connected to the fixing collar 51 and located on both sides of the rod body 1.

[0044] Two connecting base plates 52 are provided to accommodate the lead-in requirements of a double-circuit line, reserving sufficient installation space for all surge arresters 6 to be installed, ensuring that each surge arrester 6 can be reliably fixed without insufficient installation space. Furthermore, the two connecting base plates 52 are respectively mounted on the fixing rings 51 and located on both sides of the pole body 1, corresponding to the lead-in positions of the overhead lines 100 on both sides of the pole body 1. This allows the conductors 101 led down from the crossarms on both sides to be connected to the surge arresters 6 on the corresponding side nearby, without the need for additional lead-in across the pole body 1. This optimizes the overall wiring space and meets the requirements for safe distance between lines, adapting to the overall structure of a 110kV double-circuit cable terminal pole with overhead lines 100 on both sides, ensuring the rationality of the overall structure and the safety of operation.

[0045] In summary, the embodiments of this application solve the problem of difficulty in lowering conductors when both overhead lines exist. Compared to the prior art where the upper phase conductor must be lowered from the side without an overhead line, or where it can only be barely achieved through complex jumper methods, this solution effectively increases the spatial distance between the phase conductors by using a progressively increasing length design for the crossarm group and a direct pull-down connection method for the conductor 101. This allows each phase conductor 101 to be smoothly and safely lowered and connected to the surge arrester 6 when both sides of the double overhead line are erected, thus achieving a reliable transition from the double overhead line to a cable. This design not only improves the convenience and safety of wiring but also enhances the applicability and functionality of the poles.

[0046] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structure made using the contents of this utility model specification and drawings, or directly or indirectly applied to other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A 110 kV double circuit cable termination pole, characterized in that, include: The pole (1) has overhead lines (100) on both sides. A crossarm assembly is provided on the pole (1) and located between the two overhead lines (100), including an upper crossarm (2), a middle crossarm (3) and a lower crossarm (4) arranged sequentially from top to bottom on the pole (1), wherein the length values ​​of the upper crossarm (2), the middle crossarm (3) and the lower crossarm (4) increase sequentially. The cable platform (5) is located on the pole (1) and at the lower end of the lower crossarm (4). Several surge arresters (6) are provided on it. The conductors (101) led out from the upper crossarm (2), middle crossarm (3) and lower crossarm (4) can be directly pulled down to the corresponding surge arresters (6).

2. The 110 kV double circuit cable termination pole according to claim 1, characterized in that: Both the middle crossarm (3) and the lower crossarm (4) are provided with several crossarm-type composite insulators (7) that allow the conductor (101) to pass through.

3. The 110 kV double circuit cable termination pole according to claim 1, characterized in that: The lower end of the cable platform (5) is provided with several cables (102) for grounding, and the multiple cables (102) are respectively connected to the surge arrester (6).

4. The 110 kV double circuit cable termination pole according to claim 3, characterized in that: The rod (1) is also provided with a plurality of single-core cable clamps (8) for fixing the cable (102).

5. The 110 kV double circuit cable termination pole according to claim 3, characterized in that: The grounding end of the cable (102) is also wrapped with a cable protection tube (103).

6. The 110 kV double circuit cable termination pole of claim 1, wherein: The cable (102) is a 110kV cable.

7. The 110 kV double circuit cable termination pole of claim 1, wherein: The cable platform (5) includes a fixed collar (51) fixedly sleeved on the rod (1) and a plurality of connecting base plates (52) connected to one side of the fixed collar (51), and a plurality of surge arresters (6) are respectively connected to the connecting base plates (52).

8. A 110 kV double circuit cable termination pole according to claim 7, characterized in that: There are two connecting base plates (52), which are respectively connected to the fixing collar (51) and located on both sides of the rod (1).

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