CN102005712B - Strain corner tower with horizontal winding and jumping wire jumper for two-loop compact power transmission line - Google Patents

Abstract

A double-circuit compact power transmission line jumper is a tension-resistant corner tower with horizontal jumping, including the tower head, the tower body, the ground wire cross arm, the upper, middle and lower wire cross arms, and the synthetic insulator fittings string; it also includes auxiliary Cross-arm; a set of ground wires is suspended on both sides of the ground wire cross-arm, and the two ends of the ground wire cross-arm are fixedly installed with ground wire auxiliary cross-arms. The upper end is fixedly connected; the upper conductor crossarm, the middle conductor crossarm and the lower conductor crossarm are respectively installed under the ground wire crossarm of the tower head from top to bottom. One phase wire is suspended on the side, and the jumper wires of each phase wire are respectively wound horizontally to the outside of the iron tower. The auxiliary cross arm is located under the lower wire cross arm, and the lower ends of each combined insulator fitting string are fixedly connected to the auxiliary cross arm. It has a compact structure, and the weight and engineering cost of the iron tower are about 30% lower than those of conventional iron towers currently used. It has good lightning protection performance and is widely applicable.

Description

The double-circuit compact transmission line jumper is a tension-resistant corner tower with horizontal jumps

Technical Field The present invention relates to the field of power transmission and distribution engineering, which belongs to the tower of overhead transmission line, and specifically relates to a kind of double-circuit compact power transmission line with the same tower and the same window.

BACKGROUND OF THE INVENTION At present, the land occupation problem of corridors of high-voltage, ultra-high voltage and ultra-high voltage overhead transmission lines in my country is becoming more and more serious, especially in economically developed areas, the problem of corridor resources is more prominent. In more local areas, transmission line corridors are already very congested. It has become very difficult to build new lines according to conventional transmission methods. How to further compress the width of line corridors, save limited land resources, further increase the line transmission capacity in unit corridors, and solve the prominent contradictions of crowded line corridors and difficulty in routing new lines has become an important issue for my country's high-voltage, ultra-high voltage, and ultra-high voltage AC and DC. A very urgent and important task in the construction of overhead transmission lines.

In addition, at the present stage, the six-phase jumpers of the conventional double-circuit line tension corner towers are all bottom-winding jumpers. The interlayer distance between the conductor cross-arms installed on the tower head is large, and the conductor cross-arms and ground wire cross-arms are very long. , The construction cost of the tension-resistant corner tower is high and the investment is large.

The research shows that the self-supporting linear tower of the double-circuit compact transmission line with the same tower and the same window can effectively solve the above problems. Taking the 750kV line as an example, the self-supporting linear tower integrates the double-circuit 750kV line in the same tower window, and the two circuits are arranged vertically and placed on both sides of the line. The patent application for invention with the application number 200810239196.4 declared by the applicant discloses a double-circuit power transmission line with the same phase sequence, the same tower and the same window. significantly compressed. The width of the line corridor controlled by the maximum wind deflection of the conductor, the same tower, the same window and the same phase sequence are 37.3m smaller than the conventional double-circuit line, and the compressed corridor width is as high as 40.1%; the line corridor width determined by the ground power frequency electric field not exceeding 4kV/m, The same-tower, same-study, same-phase sequence is 21m smaller than conventional double-circuit lines, and the compressed corridor width is as high as 36.9%. Second, corona loss can save 11-15%. Third, it can also reduce project investment and improve the electromagnetic environment. The superiority is very prominent. The invention patent application of 200810239196.4 discloses a self-supporting linear tower structure.

SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to provide a double-circuit compact power transmission line with the same tower head and the same window, compact structure in the vertical direction (direction perpendicular to the ground), low engineering cost and good lightning protection performance. The jumper is a tension-resistant corner tower that jumps horizontally. The strain-resistant corner tower can be used for high-voltage, extra-high voltage and extra-high voltage transmission lines in flat land, hilly and mountainous areas, and can simultaneously suspend double-circuit conductors.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions to achieve.

A double-circuit compact power transmission line jumper is a tension-resistant corner tower with horizontal winding and jumping, including the tower head, the tower body, the ground wire cross arm on the top of the tower head, the upper, middle and lower wire cross arms, and synthetic insulator fittings It is characterized in that: it also includes an auxiliary cross-arm; a group of ground wires are suspended on both sides of the ground wire cross-arm, and the two ends of the ground wire cross-arm are fixedly installed with ground wire auxiliary cross-arms, and each ground wire auxiliary cross-arm The two ends of the tower head are fixedly connected with the upper end of a set of synthetic insulator fittings strings; the upper conductor crossarm, the middle conductor crossarm and the lower conductor crossarm are respectively installed under the ground wire crossarm of the tower head from top to bottom, and the upper conductor crossarm, middle conductor crossarm One phase conductor is suspended on both sides of the conductor cross-arm and the lower conductor cross-arm respectively, and the jumper wires of each phase conductor are respectively wound horizontally to the outside of the iron tower. The cross arm is fixedly connected.

The wire jumpers of the upper phase, middle phase, and lower phase wires are respectively equipped with corresponding jumper supports, and the wire jumpers of the upper phase, middle phase, and lower phase wires are fixed on the corresponding jumper supports, that is, the upper wire jumper The middle wire jumper and the lower wire jumper are respectively fixed on the upper jumper support, the middle jumper support and the lower jumper support, and the two ends of each jumper support are fixedly connected by synthetic insulator fittings strings.

Each composite insulator fitting string is composed of four synthetic insulator fittings strings located on a vertical line; the upper end of the first synthetic insulator fitting string is fixedly connected to the auxiliary cross-arm of the ground wire, and the lower end is fixedly connected to the upper jumper support body; The upper end of the synthetic insulator fitting string is fixedly connected to the upper jumper support body, and the lower end is fixedly connected to the middle jumper support body; the upper end of the third synthetic insulator fitting string is fixedly connected to the middle jumper support body, and the lower end is fixedly connected to the lower jumper support body body; the upper end of the fourth synthetic insulator fitting string is fixedly connected to the lower jumper support body, and the lower end is fixedly connected to the auxiliary cross-arm.

The present invention is used for matching application with the self-supporting linear tower of the double-circuit power transmission line with the same phase sequence, the same tower and the same window in the invention patent application of 200810239196.4.

The present invention has the following advantages:

1. In the present invention, because the jumpers of the conductors of each phase jump horizontally to the outside of the iron tower, the vertical structure of the tower head is compact, and the distance between the upper conductor cross arm, the middle conductor cross arm and the lower conductor cross arm is small, that is, the upper, middle and lower The interlayer distance of each phase conductor and its conductor jumper is small, only about two-thirds of the vertical distance between the three-layer conductor crossarms of the conventional double-circuit line of the same voltage level, which can meet the requirements of high voltage and ultra-high voltage. , UHV AC and DC overhead transmission lines technical requirements.

2. The horizontal structure of the tower head is very compact. The lengths of the upper conductor crossarm, the middle conductor crossarm and the lower conductor crossarm installed with three (six) phase conductors are very short; The cross-arm of the ground wire is also short, only about two-thirds of the cross-arm of the ground wire of the tension-resistant corner tower of the conventional double-circuit line of the same voltage level.

3. The six-phase jumpers of the two (double) circuit lines of the present invention are all horizontally and outwardly wound, which is completely different from the six-phase jumpers of the conventional double-circuit line tension corner towers, which are all wound from the bottom. Because the six-phase jumpers of the conventional double-circuit line tension-resistant corner towers all jump from the bottom, the cross-arms of the conductors and the ground wires are very long, and the interlayer distance between the conductor cross-arms is very large.

4. Because the horizontal and vertical structures of the tower head of the present invention are very compact, and the mechanical properties are very excellent, compared with the same type of tension-resistant corner tower of the conventional double-circuit line, the weight of the iron tower is reduced by about 30%; therefore, the single The engineering cost of the base iron tower will also be reduced by about 30%; the economic benefits are very obvious.

5. Since the ground wire cross arm of the present invention is longer than the wire cross arm, but much shorter than the ground wire cross arm of the same type of tension-resistant corner tower of the conventional double-circuit line, it is easy to realize the negative protection angle for the horizontal jump wire. Therefore, the lightning protection performance of the iron tower of the invention is good.

6. The present invention has wide applicability; not only flat land and hilly areas are applicable, but also general mountainous areas and even high mountains and large ridges are also applicable.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic front view of the present invention,

Fig. 2 is a schematic side view of Fig. 1;

FIG. 3 is a schematic top view of FIG. 1;

FIG. 4 is a schematic cross-sectional view along line A-A of FIG. 1 .

In the figure: 1- Tower head, 2- Tower body, 3- Upper wire cross arm, 4- Middle wire cross arm, 5- Lower wire cross arm, 6- Ground wire cross arm, 7- Ground wire, 8- Ground Line auxiliary crossarm, 9-synthetic insulator fittings hanging string, 91-the first segment of synthetic insulator fittings string, 92-the second segment of synthetic insulator fittings string, 93-the third segment of synthetic insulator fittings string, 94-the fourth segment of synthetic insulator fittings Fitting string, 10-upper phase wire, 11-middle phase wire, 12-lower phase wire, 13-upper wire jumper, 14-middle wire jumper, 15-lower wire jumper, 16-auxiliary cross arm, 17- Wire tension insulator fittings string, 18-jumper support body, 181-upper jumper support body, 182-middle jumper support body, 183-lower jumper support body.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Fig. 1 and Fig. 2 show the present invention, that is, the double-circuit compact transmission line jumper is a tension-resistant corner tower with horizontal jumping, including a tower head 1, a tower body 2, and a ground at the top of the iron tower head 1. Line cross-arm 6, upper conductor cross-arm 3, middle conductor cross-arm 4 and lower conductor cross-arm 5, synthetic insulator fittings string 9; it also includes auxiliary cross-arm 16; 7, see Figure 3, the two ends of the ground wire cross arm 6 are fixedly installed with the ground wire auxiliary cross arm 8, and the four ends of each ground wire auxiliary cross arm 8 are connected with a group of composite insulator fittings strings 9 respectively. The upper end is fixedly connected; the upper wire cross arm 3, the middle wire cross arm 4 and the lower wire cross arm 5 are respectively installed on the tower head 1 and under the ground wire cross arm 6 from top to bottom;

The upper wire cross arm 3, the middle wire cross arm 4 and the lower wire cross arm 5 have the same length specification, the vertical distance between layers is equal, and the ground wire cross arm 6 is longer than the upper wire cross arm 3, the middle wire cross arm 4 and the lower wire cross arm 5. The length of the wire cross arm 5, the greater length is determined according to the need for the protection angle of the ground wire;

The upper phase conductor 10 is suspended on both sides of the upper conductor cross arm 3, the middle phase conductor 11 is respectively suspended on both sides of the middle conductor cross arm 4, and the lower phase conductor 12 is respectively suspended on both sides of the lower conductor cross arm 5, see Fig. 4, the upper phase conductor 10 The upper conductor jumper 13 of the upper conductor jumps horizontally to the outside of the iron tower respectively; the same as the jumper mode of the upper conductor jumper 13, the middle conductor jumper 14 of the middle phase conductor 11 and the lower conductor jumper 15 of the lower phase conductor 12 also respectively Horizontal jumping on the outside of the iron tower; the wire jumpers for the horizontal jumping are respectively connected to the corresponding wires on the front and rear sides of the iron tower. The auxiliary cross arm 16 is located below the lower conductor cross arm 5. 16 fixed connections.

The structure of the auxiliary cross-arm 16 is the same as the structure and specifications of the ground wire cross-arm 6 (not shown in the figure), that is, the two ends of the auxiliary cross-arm 16 are fixedly equipped with auxiliary auxiliary cross-arms; the two ends of each auxiliary auxiliary cross-arm A total of four ends are respectively fixedly connected with the lower end of a set of composite insulator fitting strings 9 .

As shown in Figure 4: the wire jumpers of the upper phase, middle phase, and lower phase wires are respectively equipped with corresponding jumper support bodies 18, that is, the upper wire jumper 13, the middle wire jumper 14 and the lower wire jumper 15 are respectively matched. There is an upper jumper support body 181, a middle jumper support body 182 and a lower jumper support body 183;

The upper conductor jumper 13, the middle conductor jumper 14 and the lower conductor jumper 15 are fixed on the corresponding jumper supports 18, that is, the upper conductor jumper 13, the middle conductor jumper 1 and the lower conductor jumper 15 are respectively fixed on the upper jumper The wire support body 181 , the middle jumper wire support body 182 and the lower jumper wire support body 183 , and the two ends of each jumper wire support body 18 are fixedly connected by composite insulator fittings strings 9 .

The front and rear sides of the upper conductor cross-arm 3, the middle conductor cross-arm 4 and the lower conductor cross-arm 5 are respectively fixed with conductor tension insulator fittings strings 17, and the other end of the conductor tension insulator fittings string 17 is connected with the corresponding fittings. The other end of the wire tension insulator fitting string 17 fixed on the upper wire cross arm 3 is connected with the upper wire jumper 13 through the connecting fittings, and the wire tension insulator fixed on the middle wire cross arm 4 The other end of the fittings string 17 is connected to the middle conductor jumper 14 through the connecting fittings, and the other end of the fittings string 17 is connected to the lower conductor jumper 15 through the connecting fittings of the conductor tension insulator fixedly mounted on the lower conductor cross arm 5; see Fig. 1 and Figure 2: Each composite insulator fitting string 9 is composed of four composite insulator fitting strings located on a vertical line; the upper end of the first composite insulator fitting string 91 is fixedly connected to the ground wire auxiliary crossarm 8, and the lower end is fixedly connected to the jumper Wire support 181; the upper end of the second synthetic insulator fitting string 92 is fixedly connected to the upper jumper support 181, and the lower end is fixedly connected to the middle jumper support 182; the upper end of the third synthetic insulator fitting string 93 is fixedly connected to the middle jumper The lower end of the support body 182 is fixedly connected to the lower jumper support body 183 ;

Claims (6)

1. a double-loop compact transmission line wire jumper is the angle tower that horizontal winding is jumped, and comprises the steel tower tower head, and body of the tower is positioned at the ground wire cross-arm at steel tower tower head top, upper conductor cross-arm, middle wire cross-arm and lower wire cross-arm, synthetic insulator hardware string; It is characterized in that: it also comprises auxiliary cross-arm (16); The both sides of described ground wire cross-arm (6) hang respectively one group of ground wire (7), the two ends of described ground wire cross-arm (6) are installed with the secondary cross-arm (8) of ground wire, and the two ends of each secondary cross-arm of described ground wire (8) are fixedly connected with one group of described synthetic insulator hardware string (9) upper end respectively; On the described tower head (1), described ground wire cross-arm (6) below is separately installed with described upper conductor cross-arm (3) from top to bottom, described middle wire cross-arm (4) and described lower wire cross-arm (5), described upper conductor cross-arm (3) both sides hang respectively phase conductor (10), phase conductor (11) during described middle wire cross-arm (4) both sides hang respectively, described lower wire cross-arm (5) both sides hang respectively lower phase conductor (12), the upper conductor wire jumper (13) of described upper phase conductor (10), the middle wire wire jumper (14) of described middle phase conductor (11) and the lower wire wire jumper (15) of described lower phase conductor (12) are jumped to steel tower outside horizontal winding respectively; Described auxiliary cross-arm (16) is positioned at described lower wire cross-arm (5) below, and the lower end of four groups of described synthetic insulator hardware strings (9) is fixedly connected with described auxiliary cross-arm (16);

Described upper conductor wire jumper (13), described middle wire wire jumper (14) and described lower wire wire jumper (15) are supporting respectively upper jumper wire support body (181), middle jumper wire support body (182) and a lower jumper wire support body (183); Described upper conductor wire jumper (13), described middle wire wire jumper (14) are individually fixed in described upper jumper wire support body (181), described middle jumper wire support body (182) and described lower jumper wire support body (183) with described lower wire wire jumper (15), and the two ends of each jumper wire support body are fixedly connected with by described synthetic insulator hardware string (9);

Every group of described synthetic insulator hardware string (9) is comprised of four sections synthetic insulator hardware strings that are positioned on the vertical line; First paragraph synthetic insulator hardware string (91) upper end is fixedly connected on the secondary cross-arm (8) of described ground wire, and the lower end is fixedly connected on described upper jumper wire support body (181); Second segment synthetic insulator hardware string (92) upper end is fixedly connected on described upper jumper wire support body (181), and the lower end is fixedly connected on described middle jumper wire support body (182); The 3rd section synthetic insulator hardware string (93) upper end is fixedly connected on described middle jumper wire support body (182), and the lower end is fixedly connected on lower jumper wire support body (183); The 4th section synthetic insulator hardware string (94) upper end is fixedly connected on described lower jumper wire support body (183), and the lower end is fixedly connected on described auxiliary cross-arm (16).

2. a kind of double-loop compact transmission line wire jumper according to claim 1 is the angle tower that horizontal winding is jumped, it is characterized in that: described upper conductor cross-arm (3), before described middle wire cross-arm (4) and the described lower wire cross-arm (5), wire tension-resistant insulator hardware string (17) fixedly is equipped with respectively in rear both sides, the other end that is installed on the described wire tension-resistant insulator hardware string (17) of described upper conductor cross-arm (3) is connected with described upper conductor wire jumper (13) by connecting gold utensil, the other end that is installed on the described wire tension-resistant insulator hardware string (17) of described middle wire cross-arm (4) is connected with described middle wire wire jumper (14) by connecting gold utensil, and the other end that is installed on the described wire tension-resistant insulator hardware string (17) of described lower wire cross-arm (5) is connected with described lower wire wire jumper (15) by connecting gold utensil.

3. a kind of double-loop compact transmission line wire jumper according to claim 1 is the angle tower that horizontal winding is jumped, it is characterized in that: described upper conductor cross-arm (3), described middle wire cross-arm (4) are identical with the specification length of described lower wire cross-arm (5), and the vertical range of interlayer equates.

4. a kind of double-loop compact transmission line wire jumper according to claim 1 is the angle tower that horizontal winding is jumped, and it is characterized in that: the length of described ground wire cross-arm (6) is greater than the length of described upper conductor cross-arm (3), described middle wire cross-arm (4) and described lower wire cross-arm (5).

5. be the angle tower of horizontal winding jumping to the described a kind of double-loop compact transmission line wire jumper of 4 any one according to claim 1, it is characterized in that: the structure of described auxiliary cross-arm (16) and specification are identical with structure and the specification of described ground wire cross-arm (6); The two ends of described auxiliary cross-arm (16) are installed with auxiliary secondary cross-arm; The two ends of each described auxiliary secondary cross-arm are fixedly connected with one group of described synthetic insulator hardware string (9) lower end respectively.

6. a kind of double-loop compact transmission line wire jumper according to claim 5 is the angle tower that horizontal winding is jumped, and it is characterized in that: described ground wire (7) hangs on the two ends of described ground wire cross-arm (6).

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