Conducting wire transposition structure of alternating-current single-circuit power transmission line

Abstract

The utility model discloses a wire transposition structure of an alternating-current single-circuit transmission line, and belongs to the field of power transmission of an electric power system. A plurality of T-shaped strain insulator strings which are horizontally arranged are arranged on a middle-phase hanging point of the tower body, and the T-shaped strain insulator strings are symmetrically distributed on the two sides of the tower body in the longitudinal direction of the wire; a horizontally-placed first strain insulator string and a horizontally-placed T-shaped strain insulator string are arranged on each of two side phase hanging points of the tower body, and the first strain insulator strings and the T-shaped strain insulator strings on the two side phase hanging points are distributed on the two sides of the tower body in the longitudinal direction of the wires respectively. The T-shaped strain insulator strings on the phase hanging points on the two sides are in central symmetry about the tower center pile; a V-shaped jumper wire insulator string is arranged on a middle-phase hanging point of the tower body, and a jumper wire is hung on the V-shaped jumper wire insulator string. The device has the advantages of simple structure, low manufacturing cost, convenience in construction and reliability in operation.

Description

Technical Field

[0001] The utility model belongs to the field of power system transmission, and in particular relates to a conductor transposition structure of an AC single-circuit transmission line. Background Art

[0002] The three phases ABC in the transmission line are usually arranged in parallel, connecting the substations at both ends. But sometimes the phase sequence of a certain section must be adjusted so that the conductor originally located in the middle phase is changed to the side phase, and the conductor originally located in the side phase is changed to the middle phase or the side phase on the other side. This is called transposition or phase change. The common transposition is to rotate the positions of the three phases ABC in sequence, and use the transposition tower to change the arrangement order of the three-phase conductors in space once to eliminate the asymmetric arrangement. This is common in order to eliminate the influence of asymmetric current and voltage of the three phases due to the long transmission line. At present, the common transposition methods in engineering are tension tower transposition and suspended transposition. The cost of tension tower transposition is relatively high; the insulator string of suspended transposition needs to increase the insulation level due to the phase-to-phase voltage, and it is inconvenient to maintain. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a conductor transposition structure for an AC single-circuit power transmission line.

[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0005] A conductor transposition structure for an AC single-circuit transmission line, wherein a plurality of horizontally placed T-shaped strain insulator strings are arranged on the phase hanging point in the middle of the tower body, and the plurality of T-shaped strain insulator strings are symmetrically distributed on both sides of the tower body along the longitudinal direction of the conductor; a horizontally placed first strain insulator string and a horizontally placed T-shaped strain insulator string are arranged on the phase hanging points on both sides of the tower body, and the first strain insulator strings and the T-shaped strain insulator strings on the phase hanging points on both sides are respectively distributed on both sides of the tower body along the longitudinal direction of the conductor, and the T-shaped strain insulator strings on the phase hanging points on both sides are symmetrical about the center of the pole tower center pile; a V-shaped jumper insulator string is arranged on the phase hanging point in the middle of the tower body, and a jumper is hung on the V-shaped jumper insulator string.

[0006] Preferably, the T-shaped tension insulator string is formed into a T shape by two second tension insulator strings in the horizontal direction and a jumper insulator string in the vertical direction; the V-shaped jumper insulator string is formed into a V shape by two symmetrically arranged insulator strings and a connecting plate at the lower end.

[0007] Preferably, the T-shaped tension insulator string consists of a first hanging point fitting, a first connecting fitting, a second connecting fitting, a third connecting fitting, a fourth connecting fitting, a fifth connecting fitting and a first insulator; the first hanging point fitting is connected by two first U-shaped hanging rings; the first U-shaped hanging ring is connected to the first connecting fitting; the end of the first connecting fitting is connected to the first insulator, and the other end of the first insulator is connected to the first insulator on the conductor side through the second connecting fitting, and the first insulator on the conductor side is connected to the conductor through the third connecting fitting; the second connecting fitting is connected to the vertical jumper insulator below through the fourth connecting fitting; the jumper insulator is connected to the jumper through the fifth connecting fitting.

[0008] Preferably, the first connecting hardware is formed by connecting the first adjustment plate, the hanging plate, the traction plate, and the first ball head hanging ring in sequence; the second connecting hardware is formed by connecting the first bowl head hanging plate, the first connecting plate, the first right-angle hanging plate, the T-shaped connecting plate, the second U-shaped hanging ring, and the second ball head hanging ring in sequence; the third connecting hardware is formed by connecting the second bowl head hanging plate, the second connecting plate, the support frame, the third U-shaped hanging ring, the pull rod, the second right-angle hanging plate, the second adjustment plate, the third U-shaped hanging ring, and the tension wire clamp in sequence; the fourth connecting hardware is formed by connecting the third right-angle hanging plate, the third connecting plate, the fourth U-shaped hanging ring, and the third ball head hanging ring in sequence; the fifth connecting hardware is formed by connecting the first suspension wire clamp, the third bowl head hanging plate, the heavy hammer plate, the fourth connecting plate, and the first suspension wire clamp in sequence.

[0009] Preferably, the V-type jumper insulator string consists of two second hanging point hardware, two sixth connecting hardware, a seventh connecting hardware, and two second insulators, and the two limbs of the V-type jumper insulator string are symmetrically arranged; the second hanging point hardware is connected to the sixth connecting hardware; the sixth connecting hardware is connected to the second insulator, and the other end of the second insulator is connected to the second insulator of the other limb through the seventh connecting hardware; the V-type insulator is connected to the jumper through the seventh connecting hardware.

[0010] Preferably, a voltage-grading shielding ring is provided on the second insulator.

[0011] Preferably, the sixth connecting hardware is formed by connecting the fourth right-angle hanging plate, the DB adjustment plate, the PT adjustment plate, the fifth U-shaped hanging ring, and the fourth ball head hanging ring in sequence; the seventh connecting hardware is formed by connecting a fourth bowl head hanging plate on each side, the sixth U-shaped hanging ring, the fifth connecting plate in the middle, and the second suspension wire clamp in sequence.

[0012] Compared with the prior art, the utility model has the following significant advantages:

[0013] 1. The use of T-shaped tension insulator strings ensures the successful exchange of the positions of the three phases ABC on the one hand, and the safe electrical distance between the three phase conductors on the other hand; 2. The middle phase jumper insulator string adopts a V-shaped structure to ensure the safe electrical distance between the middle phase jumper and the tower at the tower window, which has the advantages of simple structure, low cost, convenient construction and reliable operation. 3. The use of straight tower transposition reduces the cost of tower materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the utility model

[0015] Figure 2 for Figure 1 Schematic diagram of the structure of the medium T-shaped insulator string.

[0016] Figure 3 for Figure 2 Schematic diagram of the specific structure of the left half.

[0017] Figure 4 for Figure 2 Schematic diagram of the specific structure of the middle right half.

[0018] Figure 5 It is a schematic diagram of the specific structure of the second connecting fitting.

[0019] Figure 6 It is a structural schematic diagram of a V-type jumper insulator string.

[0020] In the figure: 1, tower body; 2, T-shaped tension insulator string; 2.1, first hanging point hardware; 2.2, first connection hardware; 2.3, second connection hardware; 2.4, third connection hardware; 2.5, fourth connection hardware; 2.6, fifth connection hardware; 2.7, first insulator; 2.9, jumper insulator; 2.11, first U-shaped hanging ring; 2.21, first adjustment plate; 2.22, hanging plate; 2.23, traction plate; 2.24, first 1. Ball head hanging ring; 2.31. First bowl head hanging plate; 2.32. First connecting plate; 2.33. First right angle hanging plate; 2.34. T-shaped connecting plate; 2.35. Second U-shaped hanging ring; 2.36. Second ball head hanging ring; 2.41. Second bowl head hanging plate; 2.42. Second connecting plate; 2.43. Support frame; 2.44. Third U-shaped hanging ring; 2.45. Pull rod; 2.46. Second right angle hanging plate; 2.47. Second adjustment plate; 2.4 8. Strain clamp; 2.51. Third right-angle hanging plate; 2.52. Third joint plate; 2.53. Fourth U-shaped hanging ring; 2.54. Third ball head hanging ring; 2.61. First suspension clamp; 2.62. Third bowl head hanging plate; 2.63. Heavy hammer; 2.64. Fourth joint plate; 3. First strain insulator string; 3.1. Second strain insulator string; 4. V-type jumper insulator string; 4.1. Second hanging point hardware; 4.2. Sixth connection hardware 4.3, seventh connection fitting; 4.4, second insulator; 4.5, voltage-equalizing shielding ring; 4.21, fourth right-angle hanging plate; 4.22, DB adjustment plate; 4.23, PT adjustment plate; 4.24, fifth U-shaped hanging ring; 4.25, fourth ball head hanging ring; 4.31, fourth bowl head hanging plate; 4.32, sixth U-shaped hanging ring; 4.33, fifth connecting plate; 4.34, second suspension wire clamp; 5, jumper; 6, jumper insulator string. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the utility model, the preferred implementation scheme of the utility model is described below in conjunction with specific embodiments. However, it should be understood that the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, the omission of some well-known structures and their descriptions in the drawings is understandable. The positional relationship described in the drawings is only used for illustrative purposes and cannot be understood as a limitation on this patent.

[0022] like Figure 1As shown, a conductor transposition structure of an AC single-circuit transmission line in this embodiment mainly includes a tower body 1, a T-shaped tension insulator string 2, a first tension insulator string 3, a V-shaped jumper insulator string 4 and a jumper 5. A plurality of horizontally placed T-shaped tension insulator strings 2 are arranged on the phase hanging point in the tower body 1, and the plurality of T-shaped tension insulator strings 2 are symmetrically distributed on both sides of the tower body 1 along the longitudinal direction of the conductor; a horizontally placed first tension insulator string 3 and a horizontally placed T-shaped tension insulator string 2 are arranged on the phase hanging points on both sides of the tower body 1, and the first tension insulator strings 3 and the T-shaped tension insulator strings 2 on the phase hanging points on both sides are respectively distributed on both sides of the tower body 1 along the longitudinal direction of the conductor, and the T-shaped tension insulator strings 2 on the phase hanging points on both sides are symmetrical about the center of the tower center pile; a V-shaped jumper insulator string 4 is arranged on the phase hanging point in the tower body 1, and a jumper 5 is hung on the V-shaped jumper insulator string 4. The above structural optimization: by setting multiple symmetrically distributed T-shaped tension insulator strings at the phase hanging points in the tower body, and adopting a specific layout of the first tension insulator string and T-shaped tension insulator string at the phase hanging points on both sides, reasonable support and transposition of the conductors are achieved, the impact of the electromagnetic environment is reduced, and the transmission efficiency and the stable operation capability of the system are improved.

[0023] Among them, the T-shaped tension insulator string 2 is composed of two second tension insulator strings 3.1 in the horizontal direction and the jumper insulator string 6 in the vertical direction to form a T shape; the V-shaped jumper insulator string 4 is composed of two symmetrically arranged insulator strings and a connecting plate at the lower end to form a V shape. The structural optimization design of the T-shaped tension insulator string: the second tension insulator string and the jumper insulator string form a T-shaped structure, which effectively disperses the electric field strength, enhances the insulation performance, and also facilitates construction, installation and later maintenance.

[0024] like Figure 2 As shown, the T-shaped tension insulator string 2 consists of a first hanging point fitting 2.1, a first connecting fitting 2.2, a second connecting fitting 2.3, a third connecting fitting 2.4, a fourth connecting fitting 2.5, a fifth connecting fitting 2.6, and a first insulator 2.7; the first hanging point fitting 2.1 is connected by two first U-shaped hanging rings 2.11; the first U-shaped hanging ring 2.11 is connected to the first connecting fitting 2.2; the end of the first connecting fitting 2.2 is connected to the first insulator 2.7, and the other end of the first insulator 2.7 is connected to the first insulator 2.7 on the conductor side through the second connecting fitting, and the first insulator 2.7 on the conductor side is connected to the conductor through the third connecting fitting 2.4; the second connecting fitting 2.3 is connected to the vertical jumper insulator 2.9 below through the fourth connecting fitting 2.5; the jumper insulator 2.9 is connected to the jumper 5 through the fifth connecting fitting 2.6. The complexity of hardware components is reduced: each connection hardware, such as the first, second, third, fourth, and fifth connection hardware, adopts a split design, which makes the assembly more flexible and convenient, and can be adjusted according to on-site needs, while ensuring the safety, reliability, and mechanical strength of the electrical connection.

[0025] like Figure 2-5 As shown, the first connection fitting 2.2 is formed by connecting the first adjustment plate 2.21, the hanging plate 2.22, the traction plate 2.23, and the first ball head hanging ring 2.24 in sequence; the second connection fitting 2.3 is formed by connecting the first bowl head hanging plate 2.31, the first connecting plate 2.32, the first right angle hanging plate 2.33, the T-shaped connecting plate 2.34, the second U-shaped hanging ring 2.35, and the second ball head hanging ring 2.36 in sequence; the third connection fitting 2.4 is formed by connecting the second bowl head hanging plate 2.41, the second connecting plate 2.42, the support frame 2.43, the third U-shaped hanging ring 2.4 4. The pull rod 2.45, the second right-angle hanging plate 2.46, the second adjustment plate 2.47, the third U-shaped hanging ring 2.44, and the tension wire clamp 2.48 are connected in sequence; the fourth connecting hardware 2.5 is connected in sequence by the third right-angle hanging plate 2.51, the third connecting plate 2.52, the fourth U-shaped hanging ring 2.53, and the third ball head hanging ring 2.54; the fifth connecting hardware 2.6 is connected in sequence by the first suspension wire clamp 2.61, the third bowl head hanging plate 2.62, the heavy hammer piece 2.63, the fourth connecting plate 2.64, and the first suspension wire clamp 2.61.

[0026] like Figure 6 As shown, the V-type jumper insulator string 4 is composed of two second hanging point hardware 4.1, two sixth connection hardware 4.2, a seventh connection hardware 4.3, and two second insulators 4.4. The two limbs of the V-type jumper insulator string are arranged symmetrically; the second hanging point hardware 4.1 is connected to the sixth connection hardware 4.2; the sixth connection hardware 4.2 is connected to the second insulator 4.4, and the other end of the second insulator 4.4 is connected to the second insulator 4.4 of the other limb through the seventh connection hardware 4.3; the V-type insulator is connected to the jumper 5 through the seventh connection hardware 4.3. Structural optimization design of the V-type jumper insulator string: the V-shaped arrangement is not only beautiful and compact, but also can balance the loads on both sides and improve the overall structural stability.

[0027] Among them, a voltage-equalizing shielding ring 4.5 is arranged on the second insulator 4.4. Adding the voltage-equalizing shielding ring can effectively balance the voltage distribution, reduce corona discharge, and reduce line loss.

[0028] Among them, the sixth connection fitting 4.2 is formed by connecting the fourth right-angle hanging plate 4.21, the DB adjustment plate 4.22, the PT adjustment plate 4.23, the fifth U-shaped hanging ring 4.24, and the fourth ball head hanging ring 4.25 in sequence; the seventh connection fitting 4.3 is formed by connecting the fourth bowl head hanging plate 4.31 on each side, the sixth U-shaped hanging ring 4.32, the fifth connecting plate 4.33 in the middle, and the second suspension wire clamp 4.34 in sequence. The design of the sixth and seventh connection fittings and other components takes into account the stress deformation under actual working conditions, ensures good contact and fixation between the jumper and the insulator, avoids the problem of loose connection caused by factors such as vibration, and improves the operation safety of the entire line.

[0029] According to the description and drawings of the utility model, those skilled in the art can easily manufacture or use the AC single-circuit power transmission line conductor transposition structure of the utility model, and can produce the positive effects recorded in the utility model.

[0030] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in conjunction with the drawings and according to specific circumstances.

[0031] Unless otherwise specified and limited, in the present invention, the terms "disposed", "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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A conductor transposition structure for an AC single-circuit power transmission line, characterized in that: A plurality of horizontally placed T-shaped tension insulator strings (2) are arranged at the phase hanging point in the middle of the tower body (1), and the plurality of T-shaped tension insulator strings (2) are symmetrically distributed on both sides of the tower body (1) along the longitudinal direction of the conductor; a horizontally placed first tension insulator string (3) and a horizontally placed T-shaped tension insulator string (2) are arranged at the phase hanging points on both sides of the tower body (1), and the first tension insulator strings (3) and the T-shaped tension insulator strings (2) on the phase hanging points on both sides are respectively distributed on both sides of the tower body (1) along the longitudinal direction of the conductor, and the T-shaped tension insulator strings (2) on the phase hanging points on both sides are symmetrical about the center of the tower center pile; a V-shaped jumper insulator string (4) is arranged at the phase hanging point in the middle of the tower body (1), and a jumper (5) is hung on the V-shaped jumper insulator string (4).

2. According to claim 1, the AC single-circuit power transmission line conductor transposition structure is characterized by: The T-shaped tension insulator string (2) is composed of two second tension insulator strings (3.1) in the horizontal direction and a jumper insulator string (6) in the vertical direction to form a T shape; the V-shaped jumper insulator string (4) is composed of two symmetrically arranged insulator strings and a connecting plate at the lower end to form a V shape.

3. The AC single-circuit power transmission line conductor transposition structure according to claim 1, characterized in that: The T-shaped tension insulator string (2) is composed of a first hanging point hardware (2.1), a first connecting hardware (2.2), a second connecting hardware (2.3), a third connecting hardware (2.4), a fourth connecting hardware (2.5), a fifth connecting hardware (2.6), and a first insulator (2.7); the first hanging point hardware (2.1) is connected by two first U-shaped hanging rings (2.11); the first U-shaped hanging ring (2.11) is connected to the first connecting hardware (2.2); the end of the first connecting hardware (2.2) The first insulator (2.7) is connected to a first insulator (2.7) at one end, the other end of the first insulator (2.7) is connected to a first insulator (2.7) on the conductor side via a second connecting fitting, the first insulator (2.7) on the conductor side is connected to the conductor via a third connecting fitting (2.4); the second connecting fitting (2.3) is connected to a vertical jumper insulator (2.9) below via a fourth connecting fitting (2.5); the jumper insulator (2.9) is connected to a jumper (5) via a fifth connecting fitting (2.6).

4. The AC single-circuit power transmission line conductor transposition structure according to claim 3, characterized in that: The first connection hardware (2.2) is formed by sequentially connecting a first adjustment plate (2.21), a hanging plate (2.22), a traction plate (2.23), and a first ball head hanging ring (2.24); the second connection hardware (2.3) is formed by sequentially connecting a first bowl head hanging plate (2.31), a first connecting plate (2.32), a first right angle hanging plate (2.33), a T-shaped connecting plate (2.34), a second U-shaped hanging ring (2.35), and a second ball head hanging ring (2.36); the third connection hardware (2.4) is formed by sequentially connecting a second bowl head hanging plate (2.41), a second connecting plate (2.42), a support frame (2.43), a third U-shaped hanging ring (2.44), and a second ball head hanging ring (2.46). .44), a pull rod (2.45), a second right-angle hanging plate (2.46), a second adjustment plate (2.47), a third U-shaped hanging ring (2.44), and a tension wire clamp (2.48) are connected in sequence; the fourth connecting hardware (2.5) is formed by connecting the third right-angle hanging plate (2.51), the third connecting plate (2.52), the fourth U-shaped hanging ring (2.53), and the third ball head hanging ring (2.54) in sequence; the fifth connecting hardware (2.6) is formed by connecting the first suspension wire clamp (2.61), the third bowl head hanging plate (2.62), the weight plate (2.63), the fourth connecting plate (2.64), and the first suspension wire clamp (2.61) in sequence.

5. The AC single-circuit power transmission line conductor transposition structure according to claim 1 or 3, characterized in that: The V-type jumper insulator string (4) is composed of two second hanging point hardware (4.1), two sixth connection hardware (4.2), a seventh connection hardware (4.3), and two second insulators (4.4), and the two limbs of the V-type jumper insulator string are symmetrically arranged; the second hanging point hardware (4.1) is connected to the sixth connection hardware (4.2); the sixth connection hardware (4.2) is connected to the second insulator (4.4), and the other end of the second insulator (4.4) is connected to the second insulator (4.4) of the other limb through the seventh connection hardware (4.3); the V-type jumper insulator string (4) is connected to the jumper (5) through the seventh connection hardware (4.3).

6. The AC single-circuit power transmission line conductor transposition structure according to claim 5, characterized in that: A voltage-grading shielding ring (4.5) is provided on the second insulator (4.4).

7. The AC single-circuit power transmission line conductor transposition structure according to claim 5, characterized in that: The sixth connection fitting (4.2) is formed by sequentially connecting a fourth right-angle hanging plate (4.21), a DB adjustment plate (4.22), a PT adjustment plate (4.23), a fifth U-shaped hanging ring (4.24), and a fourth ball head hanging ring (4.25); the seventh connection fitting (4.3) is formed by sequentially connecting a fourth bowl head hanging plate (4.31) on each of the left and right sides, a sixth U-shaped hanging ring (4.32), a fifth connecting plate (4.33) in the middle, and a second suspension wire clamp (4.34).

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