CN204928052U - A pole-type vertically arranged compact power transmission line - Google Patents

Abstract

The utility model provides a rod -type vertical arrangement compact transmission line constitutes characterized by by single loop straight line pole, single loop strain insulator pole (5), combined insulator (6), strain insulator string (7), wire (10) and ground wire (11): the three -phase wire is vertical arrangement, and wire (10) and the strain insulator pole drainage line (8) that hang on the sharp pole of single loop pass through direct with the fixed string point connection of gold utensil, wire (10), ground wire (11) strain insulator -string are hung and are a little set up in single loop strain insulator pole (5) preceding, the rear side of way direction of advance along the line, combined insulator (6) are located the side of circuit direction of advance for fixed strain insulator pole drainage line (8), combined insulator (6) comprise insulator chain and post insulators to be connected with the pole body, form the triangle -shaped structure. The beneficial effects of the utility model are that, reduce the line corridor width, it is high to reduce the pole, effectively improves overhead transmission line's visual impact influence, and is favorable to improving natural load of a line.

Description

A kind of rod-type vertical arrangement compact transmission line

Technical field

The utility model relates to a kind of rod-type such as pillar such as employing steel pipe pole, reinforced concrete frame etc., the compact of vertical arrangement, single back transmission line, espespecially one is applicable to city, and line corridor is nervous, and transmission line visual impact is had to the overhead transmission line of requirement.

Background technology

At present, the rod-type such as steel pipe pole, reinforced concrete frame transmission line with it taking up an area less, structure is simple, advantage in easy construction etc., is widely used in city, during outskirts of a town high pressure overhead power line builds.But along with the raising of Urban life quality, and the restriction of urban land and planning, conventional aerial transmission line wire cross-arm is longer, makes the width of corridor of circuit often not reach city planning design requirement, has been difficult to the growth requirement adapting to city.

Summary of the invention

Wider at width of corridor in order to overcome existing rod-type transmission line, the deficiency of the aspects such as visual impact is stronger, the utility model provides a kind of compact of rod-type vertical arrangement, single back transmission line.Because phase conductor is close to shaft, when applying to city transmission line, lead, line projection substantially within urban green belts scope.

The utility model solves the technical scheme that its technical problem adopts:

A kind of rod-type vertical arrangement compact transmission line, be made up of single loop straight line pole, single loop tension-resistant rod, Assembled insulated, strain insulator string, wire and ground wire, the utility model feature is: three-phase conducting wire is vertical arrangement, and the wire be suspended on single loop straight line pole is directly connected with fixing hanging point by gold utensil with tension-resistant rod drainage thread; Wire, ground wire strain insulator-string hanging point are arranged at the forward and backward side of single loop tension-resistant rod along circuit direction of advance; Assembled insulated is positioned at the side of circuit direction of advance, for fixing tension-resistant rod drainage thread; Assembled insulated is made up of insulator string and post insulator, and is connected with shaft, forms triangular structure.

Single loop straight line pole described in the utility model is made up of straight line pole insulating bar head and the common shaft of straight line pole, and wherein straight line pole insulating bar head adopts insulating material; Wire and ground wire are distributed on straight line pole insulating bar head respectively by wire cantilever and ground wire cantilever.

The utility model three-phase conducting wire adopts compact vertical arrangement, straight line pole club head portion adopts insulating material design, and insulation full skirt is set on bar head, without the need to considering that wire is to bar head electrical safety gap, wire is directly hung on the cantilever stretched out, line corridor width and wire phase spacing are shortened; Tension-resistant rod adopts strain insulator string to be hung on the front and rear sides of mobile jib along line direction, and the alternate horizontal range of wire is reduced.Mobile jib corner inner angle side can adopt post insulator as required, or post insulator and common insulator string form the fixing tension-resistant rod drainage thread of Assembled insulated, to ensure the secured electrical gap of drainage thread to tension-resistant rod.

The utility model eliminates suspension insulator and the tension-resistant rod drainage thread pendency height of straight line pole, decreases the phase spacing of vertical arrangement overhead transmission line, phase conductor is arranged compacter, reduce bar overall height simultaneously.No matter be straight line pole, or tension-resistant rod, owing to leading, the arm of force that ground wire is stressed is shorter, is beneficial to minimizing moment loading, effectively will improve that bar is stressed, force transferring structure, under the prerequisite ensureing fail safe, reduces bar material consumption, optimizes track investment cost.

As the compact transmission line of routine, vertical arrangement compact transmission line reduces phase spacing, improves its natural transmission power.For 220kV circuit, wire adopts two division 2 × 300 aluminium alloy stranded conductors.The alternate vertical range of conventional vertical arrangement transmission line is about 6m, and natural power is 154MW; The alternate vertical range of vertical arrangement compact transmission line is about 3m, and natural power is 178MW, increases by 15.6% than conventional electrical power lines road.

The beneficial effects of the utility model are, reduce line corridor width, reduce bar high, effectively improve the visual impact impact of overhead transmission line, and are conducive to improving circuit natural power.

The utility model content is set forth further below in conjunction with drawings and Examples.

Accompanying drawing explanation

Fig. 1 is the utility model rod-type vertical arrangement compact transmission line schematic diagram;

Fig. 2 is the utility model straight line pole schematic diagram;

Fig. 3 is the utility model tension-resistant rod schematic diagram;

Fig. 4 is the sub-schematic diagram of Assembled insulated;

In figure: 1 straight line pole insulating bar head, the common shaft of 2 straight line pole, 3 ground wire cantilevers, 4 wire cantilevers, 5 single loop tension-resistant rods, 6 Assembled insulated, 7 strain insulator strings, 8 tension-resistant rod drainage threads, 9 drainage thread hanging holes, 10 wires, 11 ground wires.

Embodiment

A kind of rod-type vertical arrangement compact transmission line, be made up of single loop straight line pole, single loop tension-resistant rod 5, Assembled insulated 6, strain insulator string 7, wire 10 and ground wire 11, the utility model feature is: three-phase conducting wire is vertical arrangement, and the wire 10 be suspended on single loop straight line pole is directly connected with fixing hanging point by gold utensil with tension-resistant rod drainage thread 8; Wire 10, ground wire 11 strain insulator-string hanging point are arranged at the forward and backward side of single loop tension-resistant rod 5 along circuit direction of advance; Assembled insulated 6 is positioned at the side of circuit direction of advance, for fixing tension-resistant rod drainage thread 8; Assembled insulated 6 is made up of insulator string and post insulator, and is connected with shaft, forms triangular structure.

Single loop straight line pole described in the utility model is made up of straight line pole insulating bar head 1 and the common shaft 2 of straight line pole, and wherein straight line pole insulating bar head adopts insulating material; Wire 10 and ground wire 11 are distributed on straight line pole insulating bar head 1 respectively by wire cantilever 4 and ground wire cantilever 3.

Fig. 1 is single loop straight line pole, single loop tension-resistant rod 5, wire 10, ground wire 11, seal, connects gold utensil, ring flange, and bar basis waits component jointly to form.Wire on straight line pole adopts straight line pole insulating bar head 1 to insulate, and does not adopt the insulation mode of common suspension insulator; Tension-resistant rod drainage thread adopts Assembled insulated 6 to fix.

In the example shown in fig. 2, single loop straight line pole is led by bearing, ground line load, be similar to straight line pole insulating bar head 1 and straight line pole common shaft 2 two parts composition of post insulator, three-phase conducting wire adopts vertical arrangement to hang on wire cantilever 4, full skirt is set up to increase creepage distance due to the outer covering insulating material of straight line pole insulating bar head 1, reach phase insulation requirement, wire cantilever is without the need to using pendency insulator string, directly wire 10 is hung on wire cantilever by gold utensil, shorten wire phase spacing, at saving line corridor with while reducing bar overall height, improve the natural power of transmission line.

In the present example illustrated in fig. 3, single loop tension-resistant rod 5 generally adopts Designing Steel Tube Pole, and lead, ground wire hanging point is arranged at the forward and backward side of mobile jib along line direction, vertical arrangement, strain insulator string 7 adopts conventional strain insulator string; As shown in Figure 4, lower is post insulator to Assembled insulated 6 patterns, and upper is Conventional insulation substring, is connected, forms stable spandrel frame with shaft; Assembled insulated 6 is arranged at the interior angle side of circuit direction of advance, for fixing tension-resistant rod drainage thread 8, makes the electric clearance requirement that drainage thread and single loop tension-resistant rod 5 reach safe.

Be specially, utilization of the present utility model should note the selection of span, conductor cross-section and insulation coordination.

Span generally should not be too large, should take appropriate measures for large span.

When wire is selected, the requirement of relevant design codes and standards to electromagnetic environment should be noted.Apart from the outer 20m place of power transmission line roadside phase conductor projection, the audible noise limit value (height above sea level is no more than 1000m) under wet wire condition should be not more than 55dB; Apart from the outer 20m place of power transmission line roadside phase conductor projection, liftoff 2m At The Height, the radio interference limit value (height above sea level is no more than 1000m) during frequency 0.5MHz should meet the regulation of following table.

Radio interference limit value (height above sea level is no more than 1000m)

Nominal voltage (kV)	110	220～330	500
				Limit value dB (μ v/m)	46	53	55

Height above sea level is no more than the area of 1000m, when tower head structural configuration, considers wire windage yaw power-frequency voltage minimum clearance alternate with switching overvoltage, should meet the regulation of following table in the alternate minimum clearance of alternate switching overvoltage and span.

Power-frequency voltage minimum clearance (m) alternate with switching overvoltage

For the transmission line of leading, ground wire has horizontal displacement requirement, can adopt lead, ground wire cantilever regulates to the mode of not homonymy arrangement.

Because suspension string is shorter, the impact of wire longitudinal unbalance tension force on bar increases to some extent.Consider that power line conductive that steel pipe pole sets up, ground wire coefficient of safety are comparatively large, stressed less, and rod-type of the present utility model is better stressed, can ensure the fail safe of straight line pole and insulating bar head.

If line corridor allows suitably to relax, also the tension-resistant rod pattern of Fig. 3 can be adopted as straight line pole, concrete grammar is: cancel strain insulator-string and tension hanging plate, strengthen the permission load of Assembled insulated (6), wire (10) is directly connected to the drainage thread hanging hole (9) as Fig. 4 by gold utensil.Such change, can cancel straight line pole insulating bar head (1), and make straight line pole be a complete bar without medial section, its phase conductor floor height and bar overall height all do not change.

Claims (2)

1. A rod-type vertically arranged compact power transmission line, consisting of a single-circuit straight rod, a single-circuit tension rod (5), a combined insulator (6), a string of tension insulators (7), a wire (10) and a ground wire (11) constitutes, and it is characterized in that: the three-phase conductor is arranged vertically, and the conductor (10) that hangs on the single-circuit linear rod and the strain-resistant rod drainage wire (8) are directly connected with the fixed hanging point by fittings; Conductor (10) ), the ground wire (11) is set on the front and rear sides of the single-circuit tension bar (5) along the line advancing direction; the combined insulator (6) is located on the side of the line The rod drain wire (8); the composite insulator (6) is composed of insulator strings and post insulators, and is connected with the rod body to form a triangular structure. 2. The rod-type vertically arranged compact power transmission line according to claim 1, characterized in that: the single-circuit straight rod is composed of a straight rod insulating head (1) and a straight rod ordinary shaft (2), wherein the straight The insulating rod head of the rod is made of insulating material; the wire (10) and the ground wire (11) are respectively distributed on the straight rod insulating rod head (1) through the wire cantilever (4) and the ground wire cantilever (3).