Duplex 550kN strain insulator string suitable for 500kV large-span crossing
By modifying the 750kV line hardware tension string, a double 550kN tension string suitable for 500kV large span crossing was designed, solving the problem of insufficient tonnage of the existing tension string and achieving a combination of high tension and low tower height.
Patent Information
- Application Number
- CN202520068716.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-01-13
AI Technical Summary
In the existing technology, the double 550kN tension strings required for large span crossings of 500kV lines are lacking in the State Grid's general-purpose fitting string library. Ordinary steel-cored aluminum stranded wire crossing towers are too tall, and the existing tension strings are insufficient in tonnage to meet the requirements.
A double-strand 550kN tension string structure was designed, consisting of insulators, ball-head hanging rings, cup-head hanging plates, right-angle hanging plates, connecting plates, and hardware assemblies. By modifying the 750kV line hardware tension strings in the State Grid's general hardware string library, the requirements for large span crossings were met.
It enables large span crossings suitable for 500kV lines, reduces the height of the crossing tower, increases tension, and meets the tension requirement of 550kN.
Smart Images
Figure CN223728543U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of strain insulator, specifically relates to a double 550kN strain insulator suitable for 500kV large span crossing. BACKGROUND
[0002] Line hardware is the main component of overhead transmission line, cooperates insulator to be used for hanging conductor on transmission tower, protects line from high pressure damage, and line hardware is the important guarantee of the safe operation of whole transmission line. Hardware string as the key component in the construction of transmission line, its hardware element is various, and the string type is complex, and often needs to be adjusted according to the actual needs of engineering in use. For large span crossing position, often no terrain can be used, if ordinary steel core aluminum stranded wire is used, then the full height of crossing tower often exceeds 100m, through comprehensive technical and economic comparison, 500kV line large span crossing often uses steel core aluminum alloy stranded wire, reduces the height of crossing tower, increases the tension, and double 550kN strain insulator is used. Considering that the maximum tonnage of 500kV line hardware strain insulator in the general hardware string library of State Grid is only double 420kN level, for double 550kN strain insulator, it needs to be reformed. CONTENT OF UTILITY MODEL
[0003] The utility model discloses a double 550kN strain insulator suitable for 500kV large span crossing, to solve the problems in the background art.
[0004] To achieve the above object, the utility model provides the following technical scheme: a double 550kN strain insulator suitable for 500kV large span crossing, including the insulator that is symmetrically arranged in front and back, the ball head hanging ring is connected on the left side of the insulator, the hardware group one is connected on the left side of the ball head hanging ring, the bowl head hanging plate is connected on the right side of the insulator, the right side of the bowl head hanging plate is equipped with the right angle hanging plate, the bowl head hanging plate and the right angle hanging plate are connected at the same block of the four corners of the connecting plate one on the front and back sides, the right angle hanging plate is connected with the connecting plate two on the right side, and the hardware group two is connected on the right side of the connecting plate two.
[0005] Preferably, the hardware group one includes the traction plate, the right side of the traction plate is connected with the ball head hanging ring, the left side of the traction plate is connected with the right side of the PT adjusting plate, the left side of the PT adjusting plate is connected with the right side of the parallel hanging plate, the left side of the parallel hanging plate is connected with the right side of the adjusting plate one, the left side of the adjusting plate one is connected with the right side of the U type hanging ring two, and the left side of the U type hanging ring two is connected with the U type hanging ring one.
[0006] Preferably, the gold set two includes a U-shaped hanging ring three, the U-shaped hanging ring three is connected to the upper end of the right side of the connecting plate two, the U-shaped hanging ring three is connected with an adjusting plate two, the adjusting plate two is provided with a U-shaped hanging ring three left side on the right side, the U-shaped hanging ring three right side is connected with a strain clamp one, the lower end of the right side of the connecting plate two is connected with the left side of the pull rod, the right side of the pull rod is connected with the left side of the U-shaped hanging ring three, and the right side of the U-shaped hanging ring three is connected with a strain clamp two.
[0007] Preferably, the front and rear sides of the connecting plate two are connected by supporting frames, and one pressure equalizing ring is connected to the outer side of each supporting frame.
[0008] Preferably, a jumper spacing rod is arranged between the two strain clamps one and between the two strain clamps two.
[0009] The technical effects and advantages of the utility model are as follows: in the 750kV line hardware strain string in the State Grid general hardware string library, the utility model selects a 6 split string type for modification, finally obtains a string type suitable for double 550kN strain string 4 split conductors, and meets the demand of 500kV line large span crossing. BRIEF DESCRIPTION OF DRAWINGS
[0010] Fig. 1 It is a schematic view of the utility model;
[0011] Fig. 2 It is a side view schematic view of the utility model.
[0012] In the drawing: 1U type hanging ring one, 2U type hanging ring two, 3 adjusting plate one, 4 parallel hanging plate, 5 PT adjusting plate, 6 traction plate, 7 ball head hanging ring, 8 insulator, 9 bowl head hanging plate, 10 connecting plate one, 11 right angle hanging plate, 12 connecting plate two, 13 U-shaped hanging ring three, 14 adjusting plate two, 15 pressure equalizing ring, 16 strain clamp one, 17 strain clamp two, 18 pull rod, 19 supporting frame. DETAILED DESCRIPTION
[0013] The technical scheme in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0014] The utility model provides a Figs. 1-2The shown one kind is suitable for 500kV big span crossing and is used double 550kN strain insulator, including the symmetrically arranged insulator 8, the insulator 8 left side connects ball head hanging ring 7, ball head hanging ring 7 left side connects hardware set one, the insulator 8 right side connects bowl head hanging plate 9, bowl head hanging plate 9 right side is equipped with right angle hanging plate 11, front and back bowl head hanging plate 9 and right angle hanging plate 11 are connected at the same block of the four corners of plate one 10, right angle hanging plate 11 right side connects plate two 12, and plate two 12 right side connects hardware set two.
[0015] In some specific embodiments of the utility model, hardware set one includes traction plate 6, and the right side of traction plate 6 is connected with ball head hanging ring 7; the left side of traction plate 6 is connected with the right side of PT adjusting plate 5; the left side of PT adjusting plate 5 is connected with the right side of parallel hanging plate 4; the left side of parallel hanging plate 4 is connected with the right side of adjusting plate one 3; the left side of adjusting plate one 3 is connected with the right side of U-shaped hanging ring two 2; and the left side of U-shaped hanging ring two 2 is connected with U-shaped hanging ring one 1.
[0016] U-shaped hanging ring one 1 is the first hardware on the tower side, is used to be connected with the cross arm of tower body, is flexible in rotation and has high mechanical strength, adjusting plate one 3 has the hole that can adjust the connecting angle between adjusting plate one 3 and U-shaped hanging ring two 2, and the left side of insulator 8 is connected with ball head hanging ring 7, which is flexible in rotation and has excellent pollution flashover resistance.
[0017] In some specific embodiments of the utility model, hardware set two includes U-shaped hanging ring three 13, which is connected to the upper end of the right side of connecting plate two 12; U-shaped hanging ring three 13 is connected with adjusting plate two 14; adjusting plate two 14 is provided with a hole for adjusting the connecting angle; the right side of U-shaped hanging ring three 13 is connected with strain clamp one 16; the lower end of the right side of connecting plate two 12 is connected with the left side of pull rod 18; the right side of pull rod 18 is connected with the left side of U-shaped hanging ring three 13; and the right side of U-shaped hanging ring three 13 is connected with strain clamp two 17.
[0018] The adjusting plate two 14 is provided with a hole for adjusting the connecting angle, and the connecting plate two 12 is arranged at the upper and lower ends of the front and back sides to connect two strain clamp one 16 and two strain clamp two 17, and each strain clamp one 16 and each strain clamp two 17 are used to receive a split conductor, thereby realizing the conversion of the split conductor 6 into a 4-split hardware commonly used in 500kV lines.
[0019] In some specific embodiments of the utility model, the front and back connecting plate two 12 are connected by support frame 19, and each support frame 19 is connected with one voltage equalizing ring 15.
[0020] The voltage equalizing ring 15 reduces the corona level of the charged hardware.
[0021] In some specific embodiments of the utility model, one jumper spacing rod is arranged between two strain clamp one 16 and between two strain clamp two 17.
[0022] Finally, it should be noted that: the above only for preferred embodiments of the utility model, and is not used to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. that is made within the spirit and principles of the utility model, should be included in the protection scope of the utility model.
Claims
1. A double 550 kN strain insulator string suitable for 500 kV long span crossing, comprising front and back symmetrical arranged insulators (8), characterized in that: The insulator (8) is connected with the ball head hanging ring (7) on the left side, the ball head hanging ring (7) is connected with the hardware group one on the left side, the insulator (8) is connected with the bowl head hanging plate (9) on the right side, the bowl head hanging plate (9) is provided with the right angle hanging plate (11) on the right side, the bowl head hanging plate (9) and the right angle hanging plate (11) are connected at the four corners of the same connecting plate one (10) on the front and back sides, the right angle hanging plate (11) is connected with the connecting plate two (12) on the right side, and the connecting plate two (12) is connected with the hardware group two on the right side.
2. The double 550 kN strain conductor suitable for 500 kV large span crossing according to claim 1, characterized in that: The hardware group one comprises the traction plate (6), the traction plate (6) is connected with the ball head hanging ring (7) on the right side, the traction plate (6) is connected with the right side of the PT adjusting plate (5) on the left side, the PT adjusting plate (5) is connected with the right side of the parallel hanging plate (4) on the left side, the parallel hanging plate (4) is connected with the right side of the adjusting plate one (3) on the left side, the adjusting plate one (3) is connected with the right side of the U-shaped hanging ring two (2) on the left side, and the U-shaped hanging ring two (2) is connected with the U-shaped hanging ring one (1) on the left side.
3. The double 550 kN strain conductor for 500 kV large span crossing according to claim 1, characterized in that: The hardware group two comprises the U-shaped hanging ring three (13), the U-shaped hanging ring three (13) is connected with the upper end of the connecting plate two (12) on the right side, the U-shaped hanging ring three (13) is connected with the adjusting plate two (14), the adjusting plate two (14) is provided with the left side of the U-shaped hanging ring three (13) on the right side, the U-shaped hanging ring three (13) is connected with the strain clamp one (16) on the right side, the lower end of the connecting plate two (12) is connected with the left side of the pull rod (18), the pull rod (18) is connected with the left side of the U-shaped hanging ring three (13) on the right side, and the U-shaped hanging ring three (13) is connected with the strain clamp two (17) on the right side.
4. The double 550 kN strain conductor for 500 kV large span crossing according to claim 3, characterized in that: The connecting plate two (12) is connected by the support frame (19) on the front and back sides, and the support frame (19) is connected with one equalizing ring (15) on the outer side.
5. The double 550 kN strain conductor for 500 kV large span crossing according to claim 4, characterized in that: A jumper spacing rod is arranged between the two strain clamp ones (16) and between the two strain clamp twos (17).