Double-loop power transmission line cable terminal pole

A cable termination and transmission line technology, applied in cable termination, cable space arrangement/configuration, building type, etc., can solve the problems of expanding the uneven settlement of the tower pile foundation, large area, increasing the tower load, etc. The risk of cross-overlap, the convenience of construction and maintenance operations, and the effect of ensuring vertical verticality

Pending Publication Date: 2022-02-25
ECONOMIC TECH RES INST OF STATE GRID ANHUI ELECTRIC POWER +1
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AI-Extracted Technical Summary

Problems solved by technology

[0003] However, the structure of the traditional platform-type cable terminal pole is relatively complex, occupying a large area, and there is a waste of resources. The double-platform mechanism and a large number of cross-arms not only increase ...
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Abstract

The invention relates to the technical field of power transmission and particularly relates to a double-loop power transmission line cable terminal pole. The cable terminal pole comprises a pole body, a ground wire cross arm, a transfer cross arm and a comprehensive platform, wherein the transfer cross arm comprises an upper-layer cross arm, a middle-layer cross arm and a lower-layer cross arm from top to bottom, the three layers of cross arms are mutually crossed in the projection direction of the ground, an end part of each layer of cross arm is provided with a plurality of different types of insulators to smoothly lead down the overhead bare conductor, and enough safe distance between downleads is ensured; and a cable terminal, a lightning arrester and a grounding box are integrated on one comprehensive platform so that maintenance operation is convenient. A construction overhaul ladder stand and a cable straightening device are installed on a side face of the cable terminal pole. According to the cable terminal pole, a structural form of a traditional cable terminal pole is optimally designed, the optimized structure is reasonable in spatial layout, materials are saved, land resource occupation is reduced, construction and maintenance convenience is greatly improved, and a guarantee is provided for safe and stable operation of a power transmission system.

Application Domain

TowersCable terminations +1

Technology Topic

Dual loopCross over +6

Image

  • Double-loop power transmission line cable terminal pole
  • Double-loop power transmission line cable terminal pole
  • Double-loop power transmission line cable terminal pole

Examples

  • Experimental program(1)

Example Embodiment

[0024] The present invention will be further described below in conjunction with the accompanying drawings:
[0025] like figure 1 and figure 2 As shown, a double-circuit transmission line cable terminal pole includes a pole body 1 , a ground wire cross arm 2 , a transfer cross arm 3 , a comprehensive platform 4 and a climbing ladder 12 . The rod body 1 is a three-section bolt spliced ​​steel rod structure with different diameters. The axis of the rod body 1 is perpendicular to the ground, and the diameter of the cross section of the rod body 1 from top to bottom increases gradually; The top end is perpendicular to the rod body 1, the horizontal angle between a pair of ground wire cross arms 2 is 180 degrees, and in the projection direction of the ground, the axis is perpendicular to the adjacent horizontal overhead line.
[0026] like image 3 As shown, the specifications and dimensions of the transfer cross-arm 3 are the same, and three layers are set below the ground wire cross-arm 2, from top to bottom, the upper-layer cross-arm 31, the middle-layer cross-arm 32, and the lower-layer cross-arm 33, each pair of transfer cross-arms. The arms 3 are at the same height, and the distances between the transfer cross arms 3 in different layers are equal in the vertical direction. The horizontal angle between the middle cross-arms 3 is 180 degrees, the axis is coplanar with the axis of the ground cross-arm 2, and the horizontal angle between the upper cross-arms 31 is 120 degrees. In the direction of ground projection, the upper cross-arm 31 and the middle The angle between the cross-arms 32 is 30 degrees, and the horizontal angle between the lower-layer cross-arms 33 is also 120 degrees, which is horizontally symmetrical with the upper-layer cross-arms 31. In the top view, the six arms of the three-layer cross-arms are "*" ” shaped staggered arrangement.
[0027] like figure 1 As shown, different types and numbers of insulator strings 11 are respectively installed at the ends of the three-layer relay cross-arm 3, so that the overhead bare wires can be led down and connected to the cable terminal. Among them, a tensile insulator string 111 and a jumper insulator string 113 are installed on both ends of the upper cross-arm 31, and a tensile insulator string 111 and a tensile insulator string 113 are installed on both ends of the middle cross-arm 32. The pillar insulator string 112 and a jumper insulator string 113 are provided with a tensile insulator string 111 , two pillar insulator strings 112 and a jumper insulator string 113 on both ends of the lower cross arm 33 . The tensile insulator string 111 is installed at the connection between the horizontal overhead line and the transfer cross-arm 3, the pillar insulator string 112 is installed on the plane where the transfer cross-arm 3 is located, and the jumper insulator string 113 is installed at the lower part of the transfer cross-arm 3, and the direction is vertical down.
[0028] like Figure 4 and Figure 5 As shown, the integrated platform 4 is composed of four trapezoidal steel plates 41, four angle steels 42 and a number of steel diagonal braces 43. The four trapezoidal steel plates 41 are located on the same plane, paired in pairs, symmetrically welded on both sides of the rod body 1, located in the rod body. 1. A gap of 5 degrees is reserved between the adjacent edge lines of the two trapezoidal steel plates 41 on one side. The four angle steels 42 are on the same plane as the trapezoidal steel plate 41 , and are welded to the four corners of the comprehensive platform 4 in a center-symmetrical manner, forming an included angle of 5 degrees with the edge line of the trapezoidal steel plate 41 . In the projection direction of the ground, the central axis of the integrated platform 4 on one side coincides with the axis of the ground wire cross arm 2 . The steel diagonal braces 43 are welded to the comprehensive platform 4 through the rod body 1. The number of steel diagonal bracings 43 between each trapezoidal steel plate 41 and the rod body 1 is at least one, and each angle steel 42 passes through at least two steel diagonal bracing. 43 is welded with the rod body 1 . Preferably, the height of the integrated platform from the ground is 6-8 meters.
[0029] like figure 1 , figure 2 , Figure 4 and Figure 5 As shown in the figure, the integrated platform 4 is provided with a ceramic sleeve type cable terminal 5, a zinc oxide arrester 6 and a grounding box 7. A ceramic sleeve type cable terminal 5 and a zinc oxide arrester 6 form a pair and are connected by a wire. Pairs are erected at the gap between two adjacent trapezoidal steel plates 41 and at the gap between the trapezoidal steel plate 41 and the angle steel 42, and a total of six pairs are installed. Porcelain sheathed cable terminal 5 is located at the edge of integrated platform 4 , zinc oxide arrester 6 is located inside integrated platform 4 , and two grounding boxes 7 are respectively installed on both sides of integrated platform 4 , close to rod body 1 .
[0030] likefigure 1 and figure 2 As shown, a cable straightening device 8 , a stainless steel cable protection tube 9 , and a reinforcing cross bar 10 are arranged below the integrated platform 4 . like Image 6 As shown in the figure, the cable straightening device 8 is composed of a hoop 81, a connecting plate 82 and a channel steel 83. The hoop 81 locks the downed cable, and at the same time, the channel steel 83 and the rod body 1 realize fixed welding, constraining the near section. The verticality of the cable; the stainless steel cable protection tube 9 is installed on the outside of the cable, and the height is at least three meters above the ground. Both ends of the stainless steel cable protection tube 9 are tightly sealed with fireproof materials and waterproof materials; The tube 9 is welded, and the other end is welded with the rod body 1, and at least one place is set on each stainless steel cable protection tube 9; the cable straightening device 8 is installed on the top of the stainless steel cable protection tube 9, and each down-conducting cable is installed at least two sets.
[0031] The above-mentioned embodiments merely describe the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, those of ordinary skill in the art can make various modifications to the technical solutions of the present invention. Variations and improvements should fall within the protection scope determined by the claims of the present invention.

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Description & Claims & Application Information

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