Cable terminal pole lead arrangement method for crevasse overhead line in pipeline dense area

Abstract

The invention discloses a cable terminal pole lead arrangement method for a crevasse overhead line in a pipeline dense area. The method comprises cable terminal pole cross arm arrangement, side vertical type cable terminal platform arrangement and lead hanging modes. An upper-layer cross arm structure, a middle-layer cross arm structure, a lower-layer cross arm structure and a cable terminal platform are distributed on the upper portion of the cable terminal rod body at intervals from top to bottom. The cable terminal rod is connected with a lead of a broken overhead line at the upper cross arm, the middle cross arm and the lower cross arm through a strain insulator string, and the lead is led to the cable terminal platform through a lead string to be connected with a cable, so that breaking is realized. According to the invention, the enough safe distance between the drainage wires connected with the overhead line can be kept, and when crevasse connection operation of a new line is carried out on one circuit of double circuits on the same tower, power failure processing does not need to be carried out on the other circuit, so that the safe operation of the cable terminal tower is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of power transmission, and in particular to a method for arranging cable terminal pole leads for one circuit of a double-circuit overhead line erected on the same tower in an area with dense underground pipelines. Background Art

[0002] In order to meet the power supply demand, the proportion of power cables in urban power grids is increasing. Due to the restrictions of road network planning and topography, when it is impossible to implement overhead lines, cable terminal towers and terminal stations are needed to realize the transfer between overhead lines and cable lines. Power lines in urban power grids are often erected in green belts on both sides of the road. The pipelines in the green belts are dense, which puts higher requirements on the selection of the location and layout of the newly installed cable terminal towers and cable terminal platforms: they must meet the engineering requirements and electrical clearances, and the distance requirements between the newly installed poles and underground pipelines. In particular, for the problem of erecting one of the double-circuit overhead lines on the same tower in areas with dense underground pipelines, it is necessary to meet the engineering breach requirements, electrical clearances, and control the foundation of the newly installed cable terminal poles and cable platforms and the distance from the underground pipelines. Summary of the invention

[0003] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a cable terminal pole for bridging a tower in an area with dense underground pipelines and arranging one of the circuits of a double-circuit overhead line.

[0004] A method for arranging cable terminal pole leads for one of the double-circuit overhead lines erected on the same tower in an area with dense underground pipelines, comprising a cable terminal pole arrangement method, a side-standing cable terminal platform arrangement method and a lead-in hanging method;

[0005] The cable terminal pole arrangement method comprises a cable terminal pole body 1 vertically installed on the ground, and a ground wire cross arm, an upper conductor cross arm, a middle conductor cross arm, and a lower conductor cross arm spaced from top to bottom from the upper part of the cable terminal pole body 1;

[0006] The upper conductor cross arm is an upper front forked cross arm 2 and an upper rear forked cross arm 3 on the breach side, an upper single cross arm 4 on the non-breach side, and an upper front lead cross arm 5 and an upper rear lead cross arm 6 on the front side of the cable terminal pole body;

[0007] The upper front and rear bifurcated crossarms on the breach side of the upper conductor crossarm are connected to the breached circuit 1 through the upper tension string 7, the upper single crossarm 4 on the non-breached side crossarm is connected to the normal stringing circuit 1, and the upper front and rear lead crossarms are respectively connected to the front side conductor 24 of the breached circuit and the rear side conductor 25 of the breached circuit through the upper lead string 8;

[0008] The middle layer conductor cross arm is a middle layer front forked cross arm 9 and a middle layer rear forked cross arm 10 on the breach side, and a middle layer single cross arm 11 on the non-breach side. The middle of the middle layer front forked cross arm is connected to the middle layer front lead cross arm 12, and the middle of the middle layer rear forked cross arm is connected to the middle layer rear lead cross arm 13;

[0009] The front and rear bifurcated cross arms of the middle layer on the breach side of the middle layer conductor cross arm are connected to the breached circuit 2 through the middle layer tension string 31, the single middle layer cross arm 11 on the non-breach side is connected to the normal stringing circuit 2, and the front and rear lead cross arms of the middle layer are respectively connected to the front side conductor 34 of the breached circuit of the middle layer and the rear side conductor 35 of the breached circuit of the middle layer through the middle layer upper lead string 33;

[0010] The lower conductor cross arm is a lower front forked cross arm 14 and a lower rear forked cross arm 15 on the breach side, and a lower single cross arm 16 on the non-breach side;

[0011] The lower front and rear forked crossarms on the breach side of the lower conductor crossarm are connected to the breached circuit three through the lower tension string 36, the lower front forked crossarm is connected to the front side conductor 39 of the lower breached circuit through the lower upper lead string 38, the lower rear forked crossarm is connected to the rear side conductor 41 of the lower breached circuit through the lower upper lead string, and the lower single crossarm 16 of the non-breached side crossarm is connected to the normal wiring circuit three;

[0012] The symmetrically arranged side-standing cable terminal platforms 17 are arranged on the front and rear sides of the cable terminal pole; each side-standing cable terminal platform includes a plurality of cable terminal platform main columns 18 and a mounting platform 19; each cable terminal platform main column is vertically arranged on the ground and is in a straight line with the cable terminal pole foundation; the mounting platform is horizontally arranged on the top of the plurality of platform main columns;

[0013] There is no lead wire on the non-break side; the phase conductor 20 on the front line of the break side is hung on the upper front forked cross arm 2 on the break side of the upper conductor cross arm, and is led to the upper front lead cross arm 5 through the jumper 22, and the front side conductor 24 of the upper break loop is hung on the front cable terminal platform 17 through the upper lead string 8 and the lower lead string 23;

[0014] The phase conductor 21 on the rear side of the breach side is hung on the rear forked cross arm 3 on the breach side of the upper conductor cross arm, and is led to the rear lead cross arm 6 through the second jumper 23, and the rear side conductor of the breach loop is connected 25 to the rear cable terminal platform through the upper lead string and the second lower lead string 27;

[0015] The phase conductor 29 of the front line of the breach side is hung on the front forked cross arm 9 of the breach side of the middle layer conductor cross arm, and is led to the front lead cross arm 12 through the jumper wire 30, and the front side conductor 34 of the middle layer breached loop is hung on the front cable terminal platform 17 through the middle layer upper lead string 33 and the lower lead string 32;

[0016] The phase conductor 42 of the rear line on the breach side is hung on the rear forked cross arm 10 on the breach side of the middle conductor cross arm, and is led to the rear lead cross arm 13 through the jumper wire 43, and the rear conductor 35 of the middle breached loop is hung on the rear cable terminal platform through the middle upper lead string and the lower lead string 44;

[0017] The lower phase conductor 45 of the line on the front side of the breach is hung on the front forked cross arm 14 of the breach side of the lower conductor cross arm, and the front conductor 39 of the lower breached loop is hung on the front cable terminal platform 17 through the jumper 46 and the lower upper lead string 38 and the lower lead string 47;

[0018] The lower phase conductor 48 of the front line on the breach side is hung on the rear forked cross arm 15 on the breach side of the lower conductor cross arm, and the rear conductor 41 of the lower breached loop is hung on the rear cable terminal platform 17 through a jumper wire 6 49 and the lower upper lead string and lower lead string 6 50.

[0019] Each tension string is arranged horizontally, and each upper lead string is arranged vertically.

[0020] Each side-type cable terminal platform is provided with three cable terminal platform main columns.

[0021] The present invention has the following beneficial effects:

[0022] The present invention solves the problem of pipeline migration caused by insufficient distance between the cable terminal platform foundation and the pipeline in areas with dense underground pipelines, greatly reduces the project cost, avoids the impact of pipeline migration on the operation and maintenance of related pipelines, and has significant economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional layout diagram of the cable terminal rod lead arrangement method;

[0024] Figure 2 This is the main view of the cable terminal rod lead arrangement method;

[0025] Figure 3 It is a side view of the cable terminal rod lead arrangement method;

[0026] Figure 4 It is a top view of the phase cross arm on the cable terminal rod lead arrangement method;

[0027] Figure 5 It is a top view of the phase cross arm in the cable terminal rod lead arrangement method;

[0028] Figure 6 This is a top view of the lower phase cross arm of the cable terminal pole lead arrangement method. DETAILED DESCRIPTION

[0029] In order to be able to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention, and the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] like Figure 1-6 As shown, the present invention provides a cable terminal pole lead-in arrangement method for one of the double-circuit overhead lines erected on the same tower in an area with dense underground pipelines, comprising a cable terminal pole arrangement method, a side-standing cable terminal platform arrangement method and a lead-in hanging method;

[0031] The cable terminal pole arrangement method comprises a cable terminal pole body 1 vertically installed on the ground, and a ground wire cross arm, an upper conductor cross arm, a middle conductor cross arm, and a lower conductor cross arm spaced from top to bottom from the upper part of the cable terminal pole body 1;

[0032] The upper conductor cross arm is an upper front forked cross arm 2 and an upper rear forked cross arm 3 on the breach side, an upper single cross arm 4 on the non-breach side, and an upper front lead cross arm 5 and an upper rear lead cross arm 6 on the front side of the cable terminal pole body;

[0033] The upper front and rear bifurcated crossarms on the breach side of the upper conductor crossarm are connected to the breached circuit 1 through the upper tension string 7, the upper single crossarm 4 on the non-breached side crossarm is connected to the normal stringing circuit 1, and the upper front and rear lead crossarms are respectively connected to the front side conductor 24 of the breached circuit and the rear side conductor 25 of the breached circuit through the upper lead string 8;

[0034] The middle layer conductor cross arm is a middle layer front forked cross arm 9 and a middle layer rear forked cross arm 10 on the breach side, and a middle layer single cross arm 11 on the non-breach side. The middle of the middle layer front forked cross arm is connected to the middle layer front lead cross arm 12, and the middle of the middle layer rear forked cross arm is connected to the middle layer rear lead cross arm 13;

[0035] The front and rear bifurcated cross arms of the middle layer on the breach side of the middle layer conductor cross arm are connected to the breached circuit 2 through the middle layer tension string 31, the single middle layer cross arm 11 on the non-breach side is connected to the normal stringing circuit 2, and the front and rear lead cross arms of the middle layer are respectively connected to the front side conductor 34 of the breached circuit of the middle layer and the rear side conductor 35 of the breached circuit of the middle layer through the middle layer upper lead string 33;

[0036] The lower conductor cross arm is a lower front forked cross arm 14 and a lower rear forked cross arm 15 on the breach side, and a lower single cross arm 16 on the non-breach side;

[0037] The lower front and rear forked crossarms on the breach side of the lower conductor crossarm are connected to the breached circuit three through the lower tension string 36, the lower front forked crossarm is connected to the front side conductor 39 of the lower breached circuit through the lower upper lead string 38, the lower rear forked crossarm is connected to the rear side conductor 41 of the lower breached circuit through the lower upper lead string, and the lower single crossarm 16 of the non-breached side crossarm is connected to the normal wiring circuit three;

[0038] The symmetrically arranged side-standing cable terminal platforms 17 are arranged on the front and rear sides of the cable terminal pole; each side-standing cable terminal platform includes a plurality of cable terminal platform main columns 18 and a mounting platform 19; each cable terminal platform main column is vertically arranged on the ground and is in a straight line with the cable terminal pole foundation; the mounting platform is horizontally arranged on the top of the plurality of platform main columns;

[0039] There is no lead wire on the non-break side; the phase conductor 20 on the front line of the break side is hung on the upper front forked cross arm 2 on the break side of the upper conductor cross arm, and is led to the upper front lead cross arm 5 through the jumper 22, and the front side conductor 24 of the upper break loop is hung on the front cable terminal platform 17 through the upper lead string 8 and the lower lead string 23;

[0040] The phase conductor 21 on the rear side of the breach side is hung on the rear forked cross arm 3 on the breach side of the upper conductor cross arm, and is led to the rear lead cross arm 6 through the second jumper 23, and the rear side conductor of the breach loop is connected 25 to the rear cable terminal platform through the upper lead string and the second lower lead string 27;

[0041] The phase conductor 29 of the front line of the breach side is hung on the front forked cross arm 9 of the breach side of the middle layer conductor cross arm, and is led to the front lead cross arm 12 through the jumper wire 30, and the front side conductor 34 of the middle layer breached loop is hung on the front cable terminal platform 17 through the middle layer upper lead string 33 and the lower lead string 32;

[0042] The phase conductor 42 of the rear line on the breach side is hung on the rear forked cross arm 10 on the breach side of the middle conductor cross arm, and is led to the rear lead cross arm 13 through the jumper wire 43, and the rear conductor 35 of the middle breached loop is hung on the rear cable terminal platform through the middle upper lead string and the lower lead string 44;

[0043] The lower phase conductor 45 of the line on the front side of the breach is hung on the front forked cross arm 14 of the breach side of the lower conductor cross arm, and the front conductor 39 of the lower breached loop is hung on the front cable terminal platform 17 through the jumper 46 and the lower upper lead string 38 and the lower lead string 47;

[0044] The lower phase conductor 48 of the front line on the breach side is hung on the rear forked cross arm 15 on the breach side of the lower conductor cross arm, and the rear conductor 41 of the lower breached loop is hung on the rear cable terminal platform 17 through a jumper wire 6 49 and the lower upper lead string and lower lead string 6 50.

[0045] The tension string is arranged horizontally, and the upper lead string is arranged vertically.

[0046] Each side-type cable terminal platform is provided with three cable terminal platform main columns.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for arranging cable terminal pole leads for overhead lines in pipeline-dense areas, characterized in that: It includes the layout method of cable terminal poles, the layout method of side-mounted cable terminal platforms and the lead-in wire hanging method; The cable terminal pole arrangement method comprises a cable terminal pole body (1) vertically installed on the ground, and a ground wire cross arm, an upper conductor cross arm, a middle conductor cross arm, and a lower conductor cross arm spaced from top to bottom from the upper part of the cable terminal pole body (1); The upper conductor cross arm comprises an upper front forked cross arm (2) and an upper rear forked cross arm (3) on the breach side, an upper single cross arm (4) on the non-breach side, and an upper front lead cross arm (5) and an upper rear lead cross arm (6) on the front side of the cable terminal pole body; The upper front and rear bifurcated cross arms on the breach side of the upper conductor cross arm are connected to the breached circuit through the upper tension string (7), the upper single cross arm (4) on the non-breached side cross arm is connected to the normal wiring circuit, and the upper front and rear lead cross arms are respectively connected to the front side conductor (24) of the breached circuit and the rear side conductor (25) of the breached circuit through the upper lead string (8); The middle layer conductor cross arm comprises a middle layer front forked cross arm (9) and a middle layer rear forked cross arm (10) on the breach side, and a middle layer single cross arm (11) on the non-breach side, wherein the middle portion of the middle layer front forked cross arm is connected to the middle layer front lead cross arm (12), and the middle portion of the middle layer rear forked cross arm is connected to the middle layer rear lead cross arm (13); The front and rear bifurcated cross arms of the middle layer on the breach side of the middle layer conductor cross arm are connected to the breached circuit 2 through the middle layer tension string (31), the single middle layer cross arm (11) on the non-breached side is connected to the normal stringing circuit 2, and the front and rear lead cross arms of the middle layer are respectively connected to the front side conductor (34) of the breached circuit of the middle layer and the rear side conductor (35) of the breached circuit of the middle layer through the middle layer upper lead string (33); The lower conductor cross arm comprises a lower front forked cross arm (14) and a lower rear forked cross arm (15) on the breach side, and a lower single cross arm (16) on the non-breach side; The lower front and rear forked cross arms on the breach side of the lower conductor cross arm are connected to the breached circuit three through the lower tension string (36), the lower front forked cross arm is connected to the front side conductor (39) of the lower breached circuit through the lower upper lead string (38), the lower rear forked cross arm is connected to the rear side conductor (41) of the lower breached circuit through the lower upper lead string, and the lower single cross arm (16) of the non-breached side cross arm is connected to the normal wiring circuit three; Symmetrically arranged side-by-side cable terminal platforms (17) are arranged on both sides of the front and rear of the cable terminal pole; each side-by-side cable terminal platform comprises a plurality of cable terminal platform main columns (18) and an installation platform (19); each cable terminal platform main column is vertically arranged on the ground and is in a straight line with the cable terminal pole base; the installation platform is horizontally arranged on top of the plurality of platform main columns; There is no lead on the non-break side; The phase conductor (20) on the front line of the breach side is hung on the upper front forked cross arm (2) on the breach side of the upper conductor cross arm, and is led to the upper front lead cross arm (5) through the jumper wire 1 (22), and the front side conductor (24) of the upper breached loop is hung on the front cable terminal platform (17) through the upper lead wire string (8) and the lower lead wire string 1 (23); The phase conductor (29) of the front line on the breach side is hung on the front forked cross arm (9) on the breach side of the middle layer conductor cross arm, and is led to the front lead cross arm (12) through the jumper wire three (30), and the front side conductor (34) of the breached loop in the middle layer is hung on the front side cable terminal platform (17) through the middle layer upper lead wire string (33) and the lower lead wire string three (32); The lower phase conductor (45) of the line on the front side of the breach is hung on the front forked cross arm (14) of the breach side of the lower conductor cross arm, and the front conductor (39) of the lower breached loop is hung on the front cable terminal platform (17) through the jumper wire five (46) and the lower upper lead wire string (38) and the lower lead wire string five (47).

2. A method for arranging cable terminal pole leads for overhead lines in pipeline-dense areas as described in claim 1, characterized in that: Each tension string is arranged horizontally, and each upper lead string is arranged vertically.

3. A cable terminal pole lead-in arrangement method for overhead lines in pipeline-dense areas as described in claim 1, wherein each side-type cable terminal platform is provided with three cable terminal platform main columns.

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