A 110kV steel pipe pole with three overhead transmission lines and one cable

Abstract

The utility model relates to a kind of 110kV same pole three return overhead cable's steel pipe pole, including pole body, cable platform and cable fixed cross arm;Several three-phase overhead lines are erected on pole body, and a group of erection cross arm is correspondingly provided for each three-phase overhead line;Cable platform is arranged on pole body, and it is arranged below erection cross arm for leading down one of three-phase overhead line, and cable head corresponding to three-phase overhead line is provided on cable platform, lightning arrester;Cable fixed cross arm is provided with several, and it is arranged in parallel along the height direction of pole body, three-phase overhead line is sequentially fixed on cable fixed cross arm after leading down, and the cable fixed cross arm on the lowermost end is spaced apart with the corresponding clamp of wire and is fixed separately after leading down wire in vertical arrangement.The utility model realizes the multiple return overhead cable, and the wire connection of overhead platform is clear and smooth, and there is no problem of leading line crossing, complex, construction inconvenience, and it is convenient for later operation and maintenance.

Description

Technical Field

[0001] This utility model belongs to the technical field of power transmission line towers, and specifically relates to a steel pipe pole for leading a 110kV three-circuit overhead cable to the next circuit. Background Technology

[0002] With the rapid development of the economy and society, urban cable lines are being used more and more widely in power grid construction. In the design field of overhead-to-cable conversion, the number of overhead circuits on the same tower varies, resulting in targeted and special methods for overhead-to-cable conversion. As the number of overhead circuits increases, the difficulty of their installation and wiring also increases. At the same time, crossover and interference may occur between conductors during wiring, which not only poses safety hazards but also affects subsequent maintenance work. Utility Model Content

[0003] To address the existing technical problems, this utility model proposes a steel pipe pole for leading a single cable from a three-circuit overhead line on the same 110kV pole, which solves the problem of inconvenient construction of multiple overhead lines.

[0004] The purpose of this utility model and the technical problem it solves are achieved by the following technical solution. According to this utility model, a steel pipe pole for leading down one of the three-phase overhead cables in a 110kV three-phase system includes a pole body, a cable platform, and cable fixing crossarms. Several three-phase overhead lines are mounted on the pole body, and each three-phase overhead line has a corresponding set of crossarms. Each set of crossarms includes an upper conductor crossarm, a middle conductor crossarm, and a lower conductor crossarm arranged parallel to each other along the pole height, corresponding to the upper phase conductor, middle phase conductor, and lower phase conductor of the three-phase overhead line. The cable platform is located on the pole body and below the crossarms for leading down one of the three-phase overhead lines. The cable platform has crossarms corresponding to the three-phase overhead lines. The cable head and surge arrester are provided. The upper phase conductor is led down to the cable head through the middle conductor crossarm and fixed by the wind-proof deflection insulator. The middle phase conductor is led to the other side of the middle conductor crossarm by wrapping the jumper wire insulator and then led down to the cable head through the lower conductor crossarm and fixed by the wind-proof deflection insulator. The lower phase conductor is led down to the cable head through the jumper wire at the end of the lower conductor crossarm. There are several cable fixing crossarms, which are arranged parallel to each other along the height of the pole. The three-phase overhead lines are fixed on the cable fixing crossarms in sequence and then led down. The lowest cable fixing crossarm is provided with clamps corresponding to the conductors at intervals to arrange the led-down conductors in a row and fix them individually.

[0005] Furthermore, a grounding crossarm for mounting the grounding wire is installed at the top of the pole.

[0006] Furthermore, a ladder is provided on one side of the pole.

[0007] Furthermore, the cable platform is detachably connected to the pole body, and the cable platform is equipped with a detachable fixing plate, which is fixedly connected to the cable head and the bottom of the surge arrester.

[0008] Furthermore, the surge arrester is grounded after being connected in parallel with the conductors in the three-phase overhead line.

[0009] Furthermore, cable protection pipes are installed on the pole via fixed brackets. The cable protection pipes are located below the cable fixing crossarm, and the conductors of the three-phase overhead lines are respectively inserted into the corresponding cable protection pipes.

[0010] Furthermore, a grounding box is installed on the pole near the ground, located on the side where the three-phase overhead line is led down.

[0011] Furthermore, the length of the upper conductor crossarm is greater than that of the middle conductor crossarm but less than that of the lower conductor crossarm.

[0012] Furthermore, the conductors in the three-phase overhead line are branched through T-type clamps, with one branch connected to the surge arrester via an equipment clamp, and the other branch connected to the terminal connector on the cable head via a transition clamp.

[0013] In summary, the wiring method in this utility model enables multiple overhead cables to be brought down to the next cable, reducing the use of cable poles and foundations. The wiring method is flexible, and the wiring of the overhead down platform is clear and smooth. There are no problems such as wire crossing, complexity, or inconvenient construction. It is convenient for later operation and maintenance, and facilitates the realization of green and sustainable development of the power grid.

[0014] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, preferred embodiments are given below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a steel pipe pole for leading a 110kV three-circuit overhead cable to the next circuit.

[0016] Figure 2 This is a schematic diagram of the pole body in this utility model.

[0017] Figure 3 This is a schematic diagram of the wiring between the cable head, surge arrester, and conductor in this utility model.

[0018] Figure 4 This is a schematic diagram showing the connection between the cable platform, cable head, and surge arrester in this utility model. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and preferred embodiments.

[0020] Please see Figure 1 , Figure 2 A steel pipe pole for leading a 110kV three-circuit overhead cable to the next circuit includes a pole body, a ground wire crossarm for installing grounding wires at the top of the pole body, and a ladder on one side of the pole body.

[0021] Three three-phase overhead lines are installed on the pole. Each three-phase overhead line has a set of crossarms. Each set of crossarms includes an upper conductor crossarm, a middle conductor crossarm, and a lower conductor crossarm, which are set parallel to each other along the height of the pole. The length of the upper conductor crossarm is greater than that of the middle conductor crossarm and less than that of the lower conductor crossarm. This helps to maintain a safe distance between the down conductors and prevent short circuits and electrical faults. Each conductor crossarm corresponds to the upper phase conductor, middle phase conductor, and lower phase conductor of the three-phase overhead line, making the installed conductors clear, smooth, and easy to maintain. The crossarms corresponding to each phase conductor of one down three-phase overhead line are set separately on one side of the pole. That is, the other side of the pole has crossarms corresponding to the two circuits of three-phase lines, which can avoid interference between the down conductors.

[0022] It also includes a cable platform installed on the pole and detachably connected to the pole. The cable platform is located below the crossarm corresponding to the three-phase overhead line and is used to bring down the three-phase overhead line. The cable platform is equipped with cable heads and surge arresters that correspond one-to-one with the conductors 1 in the three-phase overhead line.

[0023] Please see Figure 3 The conductor 1 of the three-phase overhead line is branched through T-type clamp 2, and one of the branches is connected to the surge arrester through equipment clamp (compression type, type B) 4. Then the surge arrester is grounded. The other branch is connected to the terminal connector 5 on the cable head through transition clamp (copper-aluminum transition equipment clamp) 3.

[0024] Please see Figure 4 The cable platform is equipped with a detachable fixing plate, which is fixed to the bottom of the cable head and the surge arrester. The cable head and the surge arrester can be moved according to the position of the conductor to facilitate the connection of conductor 1. The cable head is located on the side of the cable platform away from the pole, and the surge arrester is located on the side of the cable platform closer to the pole. The upper phase conductor of the three-phase overhead line is fixed and led down to the cable head through the wind-proof deflection insulator 6 on the middle conductor crossarm. The middle phase conductor is led to the other side of the middle conductor crossarm by wrapping the jumper wire insulator 7 and then fixed and led down to the cable head through the wind-proof deflection insulator 6 on the lower conductor crossarm. The lower phase conductor is led down to the cable head through the jumper wire at the end of the lower conductor crossarm.

[0025] Several cable fixing crossarms are provided and are arranged parallel to each other along the height of the pole. They are fixed to the pole by connecting rods. The conductors 1 of the three-phase overhead line are fixed on the cable fixing crossarms in sequence and then led down. The lowest cable fixing crossarm is provided with clamps 8 corresponding to the conductors 1 at intervals to arrange the led-down conductors 1 in a line and fix them individually to avoid crossing. The arrangement of conductors 1 is clear and there are no problems of wire crossing, complexity, or inconvenience in construction. It is convenient for later operation and maintenance.

[0026] Furthermore, a grounding box is installed on the pole near the ground for centralized grounding of the cable. The grounding box is located on the side of the three-phase overhead line leading down for easy connection to the cable. Cable protection pipes are also installed on the pole via fixed brackets. The cable protection pipes are located below the cable fixing crossarm. The conductors 1 of the three-phase overhead line leading down are inserted into the corresponding cable protection pipes and then connected to the underground cable system.

[0027] The above description is merely a preferred embodiment of this utility model. Any simple modifications, equivalent changes, and alterations made by those skilled in the art to the above embodiments based on the technical essence of this utility model without departing from the scope of the technical solution of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A steel pipe pole for leading a 110kV three-circuit overhead cable to the next circuit, characterized in that: This includes the pole body, cable platform, and cable fixing crossarm; Several three-phase overhead lines are erected on the pole. Each three-phase overhead line is equipped with a set of crossarms. Each set of crossarms includes an upper conductor crossarm, a middle conductor crossarm, and a lower conductor crossarm, which are set parallel to each other along the height of the pole and correspond to the upper phase conductor, middle phase conductor, and lower phase conductor in the three-phase overhead line. The cable platform is set on the pole and below the crossarm to bring down one of the three-phase overhead lines. The cable platform is equipped with cable heads and surge arresters corresponding to the three-phase overhead lines. The upper phase conductor is brought down through the middle conductor crossarm and fixed by the wind-proof insulator to the cable head. The middle phase conductor is brought down to the other side of the middle conductor crossarm by wrapping the jumper wire insulator and then brought down through the lower conductor crossarm and fixed by the wind-proof insulator to the cable head. The lower phase conductor is brought down through the jumper wire at the end of the lower conductor crossarm to the cable head. Several cable fixing crossarms are provided and are arranged parallel to each other along the height of the pole. The three-phase overhead lines are fixed on the cable fixing crossarms in sequence and then led down. The lowest cable fixing crossarm is provided with clamps corresponding to the conductors at intervals to arrange the led-down conductors in a row and fix them individually.

2. The steel pipe pole for leading a 110kV three-circuit overhead cable to the next circuit as described in claim 1, characterized in that: The top of the pole is equipped with a grounding crossarm for mounting the grounding wire.

3. The steel pipe pole for leading a 110kV three-circuit overhead cable to the next circuit as described in claim 1, characterized in that: A ladder is provided on one side of the pole.

4. The steel pipe pole for leading a 110kV three-circuit overhead cable to the next circuit as described in claim 1, characterized in that: The cable platform is detachably connected to the pole body, and the cable platform is equipped with a detachable fixing plate, which is fixedly connected to the cable head and the bottom of the surge arrester.

5. The steel pipe pole for leading a 110kV three-circuit overhead cable to the next circuit as described in claim 1, characterized in that: The surge arrester is connected in parallel with the conductors in the three-phase overhead line and then grounded.

6. The steel pipe pole for leading a 110kV three-circuit overhead cable to the next circuit as described in claim 1, characterized in that: Cable protection pipes are installed on the pole via fixed brackets. The cable protection pipes are located below the cable fixing crossarm, and the conductors of the three-phase overhead lines are inserted into the corresponding cable protection pipes.

7. The steel pipe pole for leading a 110kV three-circuit overhead cable to the next circuit as described in claim 1, characterized in that: A grounding box is installed on the pole near the ground, located on the side of the three-phase overhead line.

8. The steel pipe pole for leading a 110kV three-circuit overhead cable to the next circuit as described in claim 1, characterized in that: The length of the upper conductor crossarm is greater than that of the middle conductor crossarm but less than that of the lower conductor crossarm.

9. A steel pipe pole for leading a 110kV three-circuit overhead cable to the next circuit as described in claim 1, characterized in that: The conductors in the three-phase overhead line are branched through T-type clamps, with one branch connected to the surge arrester through an equipment clamp, and the other branch connected to the terminal connector on the cable head through a transition clamp.

Images