Tension strings for high voltage lines

Abstract

This utility model relates to the field of tension strings, and more particularly to tension strings for high-voltage lines, including clamps and connecting hardware; one end of the clamp is provided with connecting hardware for connecting the clamp and the tower; this utility model first passes the conductor through the clamp, then assembles the arc-shaped cover plate on the clamp with it, and then connects the clamp and the tower with the connecting hardware. By adding a sealing structure, rainwater can be prevented from entering the tension string, thereby ensuring that its insulation performance is always in good condition, ensuring the safe and stable operation of the high-voltage line. At the same time, it can maintain the uniform distribution of the electric field, reduce corona and partial discharge, and improve the electrical performance and power transmission efficiency of the line. In addition, it is not affected by rainwater erosion and bulging cracking. The metal parts of the tension string are not easy to rust and corrode, and the insulation parts are not easy to be damaged by moisture, expansion, etc., thus enabling it to work stably within its design life.

Description

Technical Field

[0001] This utility model relates to the field of tension strings, and more particularly to tension strings for high-voltage lines. Background Technology

[0002] High-voltage lines refer to power lines used to transmit high-voltage electrical energy, generally referring to power lines with a voltage level of 1kV and above, including overhead lines and cable lines. High-voltage line tension strings are important components used to fix and support conductors and withstand conductor tension in high-voltage transmission lines. They are usually composed of insulator strings, tension clamps, connecting hardware, and protective hardware. They can withstand the tension generated by the conductor due to its own weight, wind pressure, temperature changes, etc., and firmly fix the conductor to the tower to prevent the conductor from slack, swinging or breaking, and ensure the mechanical stability of the line.

[0003] Even after the existing conductor is crimped, there may still be tiny gaps between it and the aluminum strands. Rainwater can enter the tension string through these gaps. After rain, snow, or freezing weather, the water accumulated in the unpressed area of ​​the tension string may freeze and expand, potentially causing the unpressed area to crack. This would weaken the connection between the tension string and the conductor, leading to loosening. This would reduce the conductor's fixation effectiveness, making it prone to displacement and swaying under the influence of external forces such as wind and gravity. In severe cases, the conductor may even detach from the tension string, causing a wire break and resulting in a power outage.

[0004] Therefore, considering that there may still be slight gaps between the existing conductors and aluminum strands after crimping, rainwater can enter the tension string through these gaps, which may cause the unpressurized area to expand and crack, making the connection less tight and resulting in loosening, thus affecting the conductor's support and operation, a high-voltage line tension string can be designed with a sealing structure to prevent rainwater from entering the tension string and maintain the stability of the conductor's operation. Utility Model Content

[0005] To overcome the problem that there may still be tiny gaps between the existing conductor crimping and the aluminum strand, rainwater can enter the tension string through the gaps, which may cause the unpressurized area to expand and crack, making the connection less tight and loose, thus affecting the operation of the conductor support.

[0006] The technical solution of this utility model is as follows: a tension string for high-voltage lines, including a clamp and connecting hardware; one end of the clamp is provided with connecting hardware for connecting the clamp and the tower, and rectangular locking grooves are opened on both sides of the upper edge of the clamp. An arc-shaped cover plate is provided above the clamp, and a rectangular locking strip is installed at the lower end of the arc-shaped cover plate corresponding to the rectangular locking groove. The rectangular locking strip drives the arc-shaped cover plate to be positioned and connected to the clamp along the rectangular locking groove. A fixing rod is transversely inserted through the middle of the rectangular locking strip.

[0007] Preferably, the wire is first passed through the clamp, then the arc-shaped cover plate on the clamp is assembled with it, and then the connecting hardware is used to connect the clamp and the tower.

[0008] Preferably, multiple sets of insulator discs are installed at lateral intervals on the outside of the clamp.

[0009] Preferably, the wire clamp has an arc-shaped groove, and an annular sealing ring is installed at each end of the arc-shaped groove.

[0010] Preferably, the wire clamp has symmetrical fixing holes on both sides of one end.

[0011] Preferably, a fixing screw is longitudinally inserted at one end of the connecting hardware, and the fixing screw passes through the connecting hardware and is positioned and connected to the wire clamp through the fixing hole.

[0012] Preferably, the connecting hardware is arranged symmetrically in the longitudinal direction, and the two sets of connecting hardware have a mounting stud inserted longitudinally at the end away from the fixing screw.

[0013] Preferably, each end of the mounting stud is fitted with a mounting nut.

[0014] The beneficial effects of this utility model are as follows: First, the conductor is passed through the clamp, then the arc-shaped cover plate on the clamp is assembled with it, and then the connecting hardware connects the clamp and the tower. By adding a sealing structure, rainwater can be prevented from entering the tension string, thereby ensuring that its insulation performance is always in good condition, ensuring the safe and stable operation of the high-voltage line. At the same time, it can maintain the uniform distribution of the electric field, reduce corona and partial discharge, and improve the electrical performance and power transmission efficiency of the line. In addition, it is not affected by rainwater erosion and bulging cracking. The metal parts of the tension string are not easy to rust and corrode, and the insulation parts are not easy to be damaged by moisture, expansion and other reasons, so it can work stably within the design life. This not only reduces the frequency of replacing the tension string and lowers the maintenance cost, but also improves the availability and reliability of the line. Attached Figure Description

[0015] Figure 1 The diagram shown is a schematic representation of the overall structure of the tension string of this utility model. Figure 2 The diagram shown is a schematic representation of the structure of the insulator sheet of the tension string of this utility model. Figure 3 The diagram shown is a schematic representation of the arc-shaped cover plate structure of the tension string of this utility model. Figure 4 The diagram shown is a schematic diagram of the connecting hardware structure of the tension string of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 1. Wire clamp; 2. Connecting hardware; 101. Insulator disc; 102. Arc-shaped groove; 103. Annular sealing ring; 104. Rectangular snap-fit ​​groove; 105. Arc-shaped cover plate; 106. Rectangular snap-fit ​​strip; 107. Fixing rod; 108. Fixing hole; 201. Fixing screw; 202. Mounting stud; 203. Mounting nut. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Please see Figures 1-4 This utility model provides an embodiment: a tension string for high-voltage lines, including a clamp 1 and a connecting hardware 2; one end of the clamp 1 is provided with a connecting hardware 2 for connecting the clamp 1 and the tower; rectangular locking grooves 104 are opened on both sides of the upper edge of the clamp 1; an arc-shaped cover plate 105 is provided above the clamp 1; a rectangular locking strip 106 is installed at the lower end of the arc-shaped cover plate 105 corresponding to the rectangular locking groove 104; the rectangular locking strip 106 drives the arc-shaped cover plate 105 to be positioned and connected to the clamp 1 along the rectangular locking groove 104; a fixing rod 107 is transversely inserted through the middle of the rectangular locking strip 106.

[0019] Please see Figures 2-3 In this embodiment, multiple sets of insulator discs 101 are installed laterally at intervals on the outside of the clamp 1. The insulator discs 101 effectively isolate the live conductor from the grounding body such as the tower, preventing current leakage and short circuit accidents. The clamp 1 has an arc-shaped groove 102, and an annular sealing ring 103 is installed at each end of the arc-shaped groove 102. The annular sealing ring 103 improves the sealing performance and prevents rainwater from entering the conductor. Fixing holes 108 are symmetrically opened on both sides of one end of the clamp 1. The fixing holes 108 facilitate the fixing of the connecting hardware 2.

[0020] Please see Figure 4 In this embodiment, a fixing screw 201 is longitudinally inserted at one end of the connecting hardware 2. The fixing screw 201 passes through the connecting hardware 2 and is positioned and connected to the wire clamp 1 through the fixing hole 108. The two connecting hardwares 2 are picked up and placed symmetrically on both sides of the wire clamp 1. Then, the fixing screw 201 passes through the connecting hardware 2 and is positioned and connected to the wire clamp 1 through the fixing hole 108. The connecting hardware 2 is arranged longitudinally symmetrically. The two sets of connecting hardware 2 have mounting studs 202 longitudinally inserted at the ends away from the fixing screws 201. The mounting studs 202 are picked up and passed through the joint of the two sets of connecting hardware 2. Mounting nuts 203 are fitted on the outside of each end of the mounting studs 202. The mounting nuts 203 are then tightened for use.

[0021] During operation, first, pass the wire through the annular sealing ring 103 and place it inside the wire clamp 1 along the arc-shaped groove 102. Then, lift the arc-shaped cover plate 105, and the rectangular retaining strip 106 will move it along the rectangular retaining groove 104 to position and connect it with the wire clamp 1. Next, lift the fixing rod 107 and pass it through the wire clamp 1 and the rectangular retaining strip 106 to reinforce the connection between the wire clamp 1 and the arc-shaped cover plate 105, thereby preventing rainwater from entering the wire. Then, lift the connecting hardware 2 on both sides and place it symmetrically on both sides of the wire clamp 1, and then tighten the screws 2. 01. Pass the connecting hardware 2 through the fixing hole 108 and position it to the clamp 1. Finally, pick up the mounting stud 202, pass it through the joint of the two sets of connecting hardware 2, and tighten it with the mounting nut 203. It can then be used. During use, the insulator 101 effectively isolates the live conductor from the grounding body such as the tower, preventing current leakage and short circuit accidents. The connecting hardware 2 effectively connects the clamp 1 and the tower, so that the entire tension string can form a stable structure and jointly bear the tension of the conductor and other external forces.

[0022] Through the above steps, the conductor is first passed through clamp 1, then the arc-shaped cover plate 105 on clamp 1 is assembled with it, and then the connecting hardware 2 connects clamp 1 and tower. By adding a sealing structure, rainwater can be prevented from entering the tension string, thereby ensuring that its insulation performance is always in good condition, ensuring the safe and stable operation of the high-voltage line. At the same time, it can maintain the uniform distribution of the electric field, reduce corona and partial discharge, and improve the electrical performance and power transmission efficiency of the line. In addition, it is not affected by rainwater erosion and bulging cracking. The metal parts of the tension string are not easy to rust and corrode, and the insulation parts are not easy to be damaged by moisture, expansion, etc., so it can work stably within the design life. This not only reduces the frequency of replacing the tension string and reduces maintenance costs, but also improves the availability and reliability of the line. It solves the problem that there may still be a small gap between the conductor and the aluminum strand after the existing conductor is crimped. Rainwater enters the tension string through the gap, which may cause the unpressurized area to expand and crack, making the connection less tight and loose, thus affecting the conductor support operation.

Claims

1. A strain conductor for high voltage lines, comprising a wire clamp (1); characterized in that: It also includes connecting hardware (2); one end of the wire clamp (1) is provided with connecting hardware (2) for connecting the wire clamp (1) and the tower. A rectangular snap-fit ​​groove (104) is opened on each of the two upper edges of the wire clamp (1). An arc-shaped cover plate (105) is provided on the top of the wire clamp (1). A rectangular snap-fit ​​strip (106) is installed at the lower end of the arc-shaped cover plate (105) corresponding to the rectangular snap-fit ​​groove (104). The rectangular snap-fit ​​strip (106) drives the arc-shaped cover plate (105) to be positioned and connected to the wire clamp (1) along the rectangular snap-fit ​​groove (104). A fixing rod (107) is transversely inserted in the middle of the rectangular snap-fit ​​strip (106).

2. A strain set for high voltage lines according to claim 1, characterized in that: Multiple sets of insulator discs (101) are installed at transverse intervals on the outside of the clamp (1).

3. A strain set for high voltage lines according to claim 1, characterized in that: The wire clamp (1) has an arc-shaped groove (102) and an annular sealing ring (103) is installed at each end of the arc-shaped groove (102).

4. A strain set for high voltage lines according to claim 1, characterized in that: The wire clamp (1) has symmetrical fixing holes (108) on both sides of one end.

5. A strain set for high voltage lines according to claim 4, characterized in that: A fixing screw (201) is longitudinally inserted at one end of the connecting hardware (2). The fixing screw (201) passes through the connecting hardware (2) and is positioned and connected to the wire clamp (1) through the fixing hole (108).

6. A strain set for high voltage lines according to claim 5, characterized in that: The connecting fittings (2) are arranged symmetrically in the longitudinal direction. The two sets of connecting fittings (2) have a mounting stud (202) longitudinally inserted at the end away from the fixing screw (201).

7. A strain set for high voltage lines according to claim 1, characterized in that: The mounting stud (202) has mounting nuts (203) fitted on both ends of the external surface.

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