CN115347520A - Six-loop tower overhead line cable leading-down structure and method - Google Patents
Six-loop tower overhead line cable leading-down structure and method Download PDFInfo
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- CN115347520A CN115347520A CN202211163879.2A CN202211163879A CN115347520A CN 115347520 A CN115347520 A CN 115347520A CN 202211163879 A CN202211163879 A CN 202211163879A CN 115347520 A CN115347520 A CN 115347520A
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- wire
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/20—Spatial arrangements or dispositions of lines or cables on poles, posts or towers
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/24—Cross arms
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/22—Arrangements of earthing wires suspended between mastheads
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
Abstract
The invention relates to a six-loop tower overhead line cable leading-down structure.A wire hanging point is arranged on each cross arm of two wire cross arms on a tower, and two wire hanging points are arranged on each cross arm of the lower four wire cross arms to form eighteen wire hanging points of a six-loop tower; the length of the ground wire cross arm is larger than that of the lower wire cross arm, three vertical down-leading wires are arranged on the left side and the right side of the ground wire cross arm, wires of wire hanging points of the upper two wire cross arms are oppositely pulled by adopting strain insulator strings and are respectively led to the corresponding down-leading wires, the lower two loops of the lower four wire cross arms are led to the upper wire by utilizing the tower body on the overhead side, the upper wire is oppositely pulled to the terminal platform by adopting the strain insulator strings, the upper two loops of the lower four wire cross arms are jumped to the cable side by adopting a jumper wire, then the upper two loops of the lower four wire cross arms are led to the cable side of the lowermost cross arm by adopting the cross arm insulators, and then the strain insulator strings are oppositely pulled to the terminal platform. The wire is directly pulled down by adopting a strain insulator string pair without bending the wire, and the check is convenient for direct pull-down.
Description
Technical Field
The invention relates to a six-loop tower overhead line cable leading-down structure and a method, and relates to the field of six-loop tower overhead line cable leading-down.
Background
The overhead transmission line and the cable transmission line are two important components of the power transmission network, the terminal tower is a key part for the connection of the overhead line and the cable line, and the overhead line and the cable line are converted at the terminal tower through a cable terminal.
For the existing terminal tower design, a dry-shaped tower is adopted, in order to ensure that a jumper wire and an iron piece of the iron tower keep enough electric clearance, a composite cross arm insulator is required to be additionally arranged at the iron tower and a cross arm of the iron tower for keeping the safe distance between a down-lead wire and the tower, the up-lead wire of the pole is led down to a cable terminal head through the continuous jumper wire and then converted into a cable to be grounded, and a cable line can better adapt to the requirements of planning and development of urban areas.
The prior art has the following defects:
1. in the prior art, four-loop overhead lines are led down at most from one base terminal tower, and if the tower is arranged in six loops, two terminal towers need to be built, so that the requirement of a city land shortage area is difficult to meet.
2. Because the 'dry' shaped pole tower has small space on the pole, the installation of an electrical gap and a cross arm insulator is not facilitated.
Disclosure of Invention
In view of the defects of the prior art, the technical problem to be solved by the invention is to provide a six-loop tower overhead line cable leading-down structure and a method.
In order to solve the technical problems, the technical scheme of the invention is as follows: a six-loop tower overhead line cable down-leading structure comprises a T-shaped tower, wherein a ground wire cross arm, an upper two-loop wire cross arm, a lower four-loop wire cross arm and a terminal platform are sequentially arranged on the tower from top to bottom, each cross arm of the upper two-loop wire cross arm is provided with a wire hanging point, and each cross arm of the lower four-loop wire cross arm is provided with two wire hanging points to form eighteen wire hanging points of six loops; the length of the ground wire cross arm is larger than that of the lower wire cross arm, three vertical down leads are arranged on the left side and the right side of the ground wire cross arm, wires of wire hanging points of the upper two wire cross arms are oppositely pulled by adopting a strain insulator string and are respectively led down to the corresponding down leads, the lower two loops of the lower four wire cross arms are led down to the upper wires by utilizing an overhead side tower body, the upper wires are oppositely pulled to a terminal platform by adopting the strain insulator string, the upper two loops of the lower four wire cross arms are jumped to a cable side after adopting a jumper, then the cross arm insulators are led down to the cable side of the lowest cross arm, and then the strain insulator string is oppositely pulled to the terminal platform.
Preferably, the tower is provided with two terminal platforms on the size side of the cable terminal tower, and the left side surface and the right side surface are provided with one terminal platform respectively.
Preferably, the wire cross arms of the upper two-circuit wire cross arm and the lower four-circuit wire cross arm are arranged in a dry character shape.
Preferably, the left end side of the ground wire cross arm exceeds the left end side of the lower wire cross arm, the right end side of the ground wire cross arm exceeds the right end side of the lower wire cross arm, and the length of the ground wire cross arm meets the requirement of the electrical gap caused by the lead.
Preferably, the wires of the wire hanging points of the two upper wire cross arms sequentially pass through the strain insulator string and the duplex jumper wire composite insulator string and are turned to be in a vertically downward direction from the horizontal direction, and finally are connected with the corresponding down lead through the lower guide wire, the lower guide wire and the down lead are connected together through the T-shaped wire clamp, the top end of the down lead is connected with the ground wire cross arm through the strain insulator string, and the bottom end of the down lead is connected with the terminal connecting terminal through the strain insulator string.
A down-leading method of a six-loop tower overhead line cable down-leading structure is carried out according to the following steps: (1) The method comprises the following steps that an earth wire cross arm is lengthened to exceed the length of a lower wire cross arm, three vertical down leads are arranged on the left end side and the right end side of the earth wire cross arm, the top end of each down lead is connected with the earth wire cross arm through a strain insulator string, and the bottom end of each down lead is connected with a terminal connecting terminal through the strain insulator string; (2) Each cross arm of the upper two-circuit wire cross arm is provided with one wire hanging point, and each cross arm of the lower four-circuit wire cross arm is provided with two wire hanging points to form eighteen wire hanging points of six circuits; (3) When the cable is down-led, the wires at the wire hanging points of the upper two wire cross arms are oppositely pulled by adopting strain insulators and are respectively led down to corresponding down-lead wires, the lower two loops of the lower four wire cross arms are used for leading down the upper wires by utilizing the tower body on the overhead side, the upper wires are oppositely pulled to the terminal platform by adopting the strain insulators, the upper two loops of the lower four wire cross arms are jumped to the cable side after adopting a jumper, then the upper wires are led down to the cable side of the lowest cross arm by adopting the cross arm insulators, and then the upper wires are oppositely pulled to the terminal platform by adopting the strain insulators.
Compared with the prior art, the invention has the following beneficial effects: the wire pull-down hanging points are added after the ground wire cross arm is lengthened, so that the two loop hanging points of the upper cross arm are located above the cable terminal, the wires can be directly pulled down by adopting strain insulator strings, direct pulling-down is realized due to no wire bending, the electrical verification is convenient, the insulator hanging points are all located on the ground wire cross arm, the processing is convenient, and the construction is also convenient. Secondly, because of the wire direct down-lead, by the main atress of strain insulator string, do not have cross arm insulator fracture risk, and the type is simple, and the check-up is convenient. Finally, the construction is easy to understand and difficult to generate ambiguity due to simple type.
The invention is described in further detail below with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a front view of an embodiment of the present invention.
Fig. 2 is a side view of an embodiment of the present invention.
Fig. 3 is a first partial schematic view of the embodiment of the present invention.
Fig. 4 is a partial schematic structural diagram of the second embodiment of the present invention.
Fig. 5 is a schematic view of a partial structure according to the third embodiment of the present invention.
Fig. 6 is a top view of a terminal platform according to an embodiment of the invention.
Detailed Description
The invention is further explained below with reference to the drawings and the embodiments.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As shown in fig. 1 to 6, the present embodiment provides a six-loop tower overhead line cable drop structure, which includes a "T" -shaped tower 1, a ground wire cross arm 2, an upper two-loop wire cross arm 3, a lower four-loop wire cross arm 4, and a terminal platform 5 are sequentially arranged on the tower from top to bottom, each cross arm of the upper two-loop wire cross arm is provided with one wire hanging point, and each cross arm of the lower four-loop wire cross arm is provided with two wire hanging points, so as to form eighteen wire hanging points of a six-loop; the length of the ground wire cross arm is greater than that of the lower wire cross arm, three vertical down leads 6 are arranged on the left side and the right side of the ground wire cross arm, the leads of the lead hanging points of the upper two wire cross arms are oppositely pulled by adopting strain insulator strings 7 and are respectively led down to the corresponding down leads, the lower two loops of the lower four wire cross arms are led down to the upper leads 8 by utilizing the overhead side tower body, the upper leads are oppositely pulled to a terminal platform (dotted parts in figures 3 and 4) by adopting the strain insulator strings, the upper two loops of the lower four wire cross arms are jumped to the cable side by adopting jumper wires 9, then the cross arm insulators are led down to the cable side of the lowest cross arm, and then the strain insulator strings are oppositely pulled to the terminal platform (double-point slide part in figure 4). The strain insulator string can bear large tension, 5 tons of tension are arranged to ensure that the wire is broken straight, and windage yaw is prevented.
In the embodiment of the invention, two terminal platforms are respectively arranged on the large and small sides of the cable terminal tower of the tower, and one terminal platform is respectively arranged on the left side surface and the right side surface of the tower.
In the embodiment of the invention, the wire cross arms of the upper two-circuit wire cross arm and the lower four-circuit wire cross arm are arranged in a dry character shape.
In the embodiment of the invention, the left end side of the ground wire cross arm exceeds the left end side of the lower wire cross arm, the right end side of the ground wire cross arm exceeds the right end side of the lower wire cross arm, and the length of the ground wire cross arm meets the requirement of an electrical gap for leading down the wire.
In the embodiment of the invention, the wires of the wire hanging points of the upper two-circuit wire cross arm are sequentially changed from the horizontal direction to the vertical downward direction through the strain insulator string and the duplex jumper wire composite insulator string 10, and finally are connected with the corresponding down lead through the lower guide wire 11, the lower guide wire and the down lead are connected together through the T-shaped clamp 12, the top end of the down lead is connected with the ground wire cross arm through the strain insulator string, and the bottom end of the down lead is connected with the terminal connecting terminal through the strain insulator string.
A method for guiding a six-loop tower overhead line cable down structure is carried out according to the following steps: (1) The method comprises the following steps that an earth wire cross arm is lengthened to exceed the length of a lower wire cross arm, three vertical down leads are arranged on the left end side and the right end side of the earth wire cross arm, the top end of each down lead is connected with the earth wire cross arm through a strain insulator string, and the bottom end of each down lead is connected with a terminal connecting terminal through the strain insulator string; (2) Each cross arm of the upper two-circuit wire cross arm is provided with one wire hanging point, and each cross arm of the lower four-circuit wire cross arm is provided with two wire hanging points to form eighteen wire hanging points of six circuits; (3) When the cable is down-led, the wires at the wire hanging points of the upper two wire cross arms are oppositely pulled by adopting strain insulators and are respectively led down to corresponding down-lead wires, the lower two loops of the lower four wire cross arms are used for leading down the upper wires by utilizing the tower body on the overhead side, the upper wires are oppositely pulled to the terminal platform by adopting the strain insulators, the upper two loops of the lower four wire cross arms are jumped to the cable side after adopting a jumper, then the upper wires are led down to the cable side of the lowest cross arm by adopting the cross arm insulators, and then the upper wires are oppositely pulled to the terminal platform by adopting the strain insulators.
The six-loop tower overhead line cable leading-down structure is mainly technically characterized in that T-shaped ground wire cross arms are adopted, electrical clearance verification and tower body structure verification are comprehensively considered, two leading-down insulator hanging points of the upper cross arms are completely arranged on a main material of a tower body, due to vertical leading-down, excessive cross arm insulators are not needed to be additionally arranged, the number of the insulators is reduced, only the leading-down conductor projection surface clearance needs to be controlled, the verification is convenient and fast, errors are not prone to occurring, construction is easy, and the number of cable terminal towers and the occupied area are reduced. The cable of the six-loop terminal tower is led down, and the overhead conductor is directly led down vertically by adopting the tensile strain insulator string in the leading-down mode. Compared with the existing double-loop and four-loop cable terminal tower lead-down scheme, the cable terminal tower has the advantages of reduced number and smaller occupied space, and is beneficial to city planning.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention will still fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides a six return circuit tower overhead line cable draws down structure which characterized in that: the tower comprises a T-shaped tower, wherein a ground wire cross arm, an upper two-circuit wire cross arm, a lower four-circuit wire cross arm and a terminal platform are sequentially arranged on the tower from top to bottom, each cross arm of the upper two-circuit wire cross arm is provided with one wire hanging point, and each cross arm of the lower four-circuit wire cross arm is provided with two wire hanging points to form eighteen wire hanging points of six circuits; the length of the ground wire cross arm is larger than that of the lower wire cross arm, three vertical down-leading wires are arranged on the left side and the right side of the ground wire cross arm, wires of wire hanging points of the upper two wire cross arms are oppositely pulled by adopting strain insulator strings and are respectively led to the corresponding down-leading wires, the lower two loops of the lower four wire cross arms are led to the upper wire by utilizing the tower body on the overhead side, the upper wire is oppositely pulled to the terminal platform by adopting the strain insulator strings, the upper two loops of the lower four wire cross arms are jumped to the cable side by adopting a jumper wire, then the upper two loops of the lower four wire cross arms are led to the cable side of the lowermost cross arm by adopting the cross arm insulators, and then the strain insulator strings are oppositely pulled to the terminal platform.
2. The six-loop tower overhead line cable down-lead structure of claim 1, wherein: the tower is provided with two terminal platforms on the size side of the cable terminal tower, and the left side surface and the right side surface are provided with one terminal platform respectively.
3. The six-loop tower overhead line cable down-lead structure of claim 1, wherein: the wire cross arms of the upper two-circuit wire cross arm and the lower four-circuit wire cross arm are arranged in a dry character shape.
4. The six-circuit tower overhead line cable drop structure of claim 1, wherein: the left end side of the ground wire cross arm exceeds the left end side of the lower wire cross arm, the right end side of the ground wire cross arm exceeds the right end side of the lower wire cross arm, and the length of the ground wire cross arm meets the requirement of an electrical gap caused by leading wires.
5. The six-circuit tower overhead line cable drop structure of claim 1, wherein: the wire of the wire hanging point of the upper two-circuit wire cross arm sequentially passes through the strain insulator string and the duplex jumper wire composite insulator string and is turned to a vertically downward direction from the horizontal direction, and finally is connected with the corresponding down-lead wire through the lower guide wire, the lower guide wire and the down-lead wire are connected together through the T-shaped clamp, the top end of the down-lead wire is connected with the ground wire cross arm through the strain insulator string, and the bottom end of the down-lead wire is connected with the terminal connecting terminal through the strain insulator string.
6. A method of pulling down a six-circuit tower overhead line cable pulling down structure according to any one of claims 1 to 5, characterized by the steps of: (1) The method comprises the following steps of lengthening an earth wire cross arm to exceed the length of a lower wire cross arm, arranging three vertical downleads at the left and right two ends of the earth wire cross arm, connecting the top ends of the downleads with the earth wire cross arm through a strain insulator string, and connecting the bottom ends of the downleads with a terminal connecting terminal through the strain insulator string; (2) Each cross arm of the upper two-circuit wire cross arm is provided with one wire hanging point, and each cross arm of the lower four-circuit wire cross arm is provided with two wire hanging points to form eighteen wire hanging points of six circuits; (3) When the cable is led down, the wires at the wire hanging points of the upper two-circuit wire cross arms are oppositely pulled by adopting strain insulators and are respectively led down to corresponding down-lead wires, the lower two circuits of the lower four-circuit wire cross arms are led down by utilizing the tower body on the overhead side, the upper phase wire is oppositely pulled to the terminal platform by adopting the strain insulators, the upper two circuits of the lower four-circuit wire cross arms jump to the cable side after adopting a jumper wire, then the upper phase wire is led down to the cable side of the lowest cross arm by adopting a cross arm insulator, and then the strain insulators are oppositely pulled to the terminal platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211163879.2A CN115347520A (en) | 2022-09-23 | 2022-09-23 | Six-loop tower overhead line cable leading-down structure and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211163879.2A CN115347520A (en) | 2022-09-23 | 2022-09-23 | Six-loop tower overhead line cable leading-down structure and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115347520A true CN115347520A (en) | 2022-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211163879.2A Pending CN115347520A (en) | 2022-09-23 | 2022-09-23 | Six-loop tower overhead line cable leading-down structure and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115347520A (en) |
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- 2022-09-23 CN CN202211163879.2A patent/CN115347520A/en active Pending
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