CN211313561U - Connecting device for double-loop cable line and overhead line - Google Patents

Connecting device for double-loop cable line and overhead line Download PDF

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Publication number
CN211313561U
CN211313561U CN201921696044.7U CN201921696044U CN211313561U CN 211313561 U CN211313561 U CN 211313561U CN 201921696044 U CN201921696044 U CN 201921696044U CN 211313561 U CN211313561 U CN 211313561U
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China
Prior art keywords
cable
cable terminal
overhead line
rod
overhead
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CN201921696044.7U
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Chinese (zh)
Inventor
向城名
汤涛
李政民
王恩来
张小平
粟增德
傅代利
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State Nuclear Electric Power Planning Design & Research Institute Chongqing Co ltd
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State Nuclear Electric Power Planning Design & Research Institute Chongqing Co ltd
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Abstract

The utility model belongs to the technical field of connecting equipment of cables and overhead lines in power engineering, and discloses a connecting device of a double-loop cable line and an overhead line; a cable terminal rear rod is arranged; the cable terminal rear rod is connected with the cable terminal front rod through a connecting beam; a platform cross arm arranged on a cable terminal rear rod and a cable terminal front rod is used as a main beam to lay a cable terminal platform; the cable terminal front rod and the cable terminal rear rod are arranged along the direction of the overhead line, the cable terminal front rod is short, and the cable terminal rear rod is high; the cable terminal front rod, the connecting beam and the cable terminal rear rod are arranged in a staggered mode, each three-phase cross arm returns to the upper part, the middle part and the lower part, each three-phase cross arm returns to the lower part, the three-phase cross arms are staggered in space, each phase can be directly connected with a corresponding phase cable terminal, and the vertical height difference of the three-phase cross arms meets the requirement of line spacing. The utility model discloses an adopt along the staggered three-phase of circuit double-pole type to shelter from each other, reduce the pole tower root and open, improve the tower position feasibility to adjust the platform size in a flexible way through the double-pole distance.

Description

Connecting device for double-loop cable line and overhead line
Technical Field
The utility model belongs to the technical field of cable and overhead line jointing equipment among the power engineering, especially, relate to a two return circuit cable run and overhead line connecting device.
Background
When the double-loop cable is led to an overhead conductor from a platform to be connected, because each loop of the existing same-tower double-loop tower is vertically arranged on the same section, a shielding relation is formed between the upper phase and the middle phase, when leading wires (electrified bare wires) are led to the middle phase and the upper phase from a cable terminal platform, shielding of cross arms below must be avoided around leading, more composite cross arm insulators need to be arranged along a tower body of the tower, the cable terminal tower is complex and messy, and the fixed end of the wire of the composite cross arm insulator is easy to loosen, so that certain hidden danger exists.
In addition, the double-loop cable terminal platform is large, a common independent steel pipe pole is difficult to support, a large tower body is often required for bearing, a needed iron tower root is large in size, and occupied space is large; the cable is often laid in urban areas, land resources are short, the tower position can be shared with other facilities such as a pipe network, the selection of a large-root iron tower is difficult, and the application range is limited; especially, cable lines are generally laid along municipal roads, sidewalks of the roads are often distributed with more pipe networks, and the connection between the cables and overhead lines cannot be realized easily because the towers cannot be erected.
In summary, the problems of the prior art are as follows:
(1) the foundation of the double-circuit cable terminal tower is large in root opening, large in occupied area, difficult in selection of urban tower positions, and capable of wasting land resources, and the road side sidewalk vertical tower can block pedestrian passages and lead to more pipelines to be changed.
(2) The upper cross arm is sheltered from by the lower floor cross arm, and the lead wire needs to be drawn around, and the cable draws with making somebody a mere figurehead to connect and needs to adopt more compound cross arm insulator, and is complicated in disorder, and the lead wire is fixed insecure.
(3) These composite cross arm insulators direct mount is in the body of the tower, and the operation maintainer of being not convenient for steps on the tower operation, and composite cross arm insulator length is shorter for the lead wire is nearer to the body of the tower distance, further influences the operation maintenance.
The difficulty of solving the technical problems is as follows:
how to solve the contradiction between the requirement of a large platform for double-circuit cables and the requirement of a city on small occupied area of a tower foundation; how to break the shielding relation of the cross arms of the upper, middle and lower layers of the double-loop tower; how to save the composite cross arm insulator needed by leading and connecting the cable and the overhead.
The significance of solving the technical problems is as follows:
1) the problem of two cable terminal tower that return in urban area is difficult to select the tower position because of the basis takes up an area of big to and the pedestrian passageway that the tower leads to is sheltered from and the road side pipeline moves and changes the problem is solved to the vertical tower.
2) The complicated and messy connection mode of the winding lead connection wire is changed to be concise and attractive.
3) The adoption of a composite cross arm insulator is omitted, the power supply reliability is improved, the engineering investment is saved, and the operation and the maintenance are convenient.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model provides a two return circuit cable run and overhead line connecting device.
The utility model discloses a realize like this, a two return circuit cable run is provided with overhead line connecting device:
a cable termination rear pole;
the cable terminal rear rod is connected with the cable terminal front rod through a connecting beam; a platform cross arm arranged on a cable terminal rear rod and a cable terminal front rod is used as a main beam to lay a cable terminal platform;
the front rod of the cable terminal and the rear rod of the cable terminal are arranged along the direction of an overhead line, the front rod of the cable terminal is short, and the rear rod of the cable terminal is high.
The three phases are staggered and mutually shielded in a way of being parallel to the line and double-rod, the root opening of the rod tower is reduced, the feasibility of the tower position is improved, and the size of the platform is flexibly adjusted through the distance between the double rods.
Furthermore, the cable terminal front rod, the connecting beam and the cable terminal rear rod are arranged with upper, middle and lower three-phase cross arms in a staggered manner, each three-phase cross arm is staggered in space, each phase can be directly connected with a corresponding phase cable terminal, and the vertical height difference of the three-phase cross arms meets the requirement of line spacing.
Through staggering each time the three-phase cross arm is in space, each phase can be directly connected with the corresponding phase cable terminal without shielding.
Further, insulator string hanging points are arranged on the upper portion of the cable terminal platform and the lower plane of the overhead cross arm, the insulator strings are tensioned and tightly connected with bare conductors, and wire clamps at two ends of the bare conductors are respectively communicated with the cable terminal and the overhead conductor strain insulator strings.
In order to avoid the stress of the cable terminal, insulator string hanging points are arranged on the upper portion of a cable terminal platform and the lower plane of the overhead cross arm, bare conductors are drawn and connected through the upper insulator string and the lower insulator string in a tensioning and tightening mode, and wire clamps at two ends of the drawn bare conductors are respectively connected with the cable terminal and the overhead conductor strain insulator string, so that the use of a large number of composite cross arm insulators is avoided, and the composite cross arm insulator is simple, attractive, safe and reliable.
Furthermore, the counter-pull insulator string is suitable to be reversely installed by adopting a composite insulator. And the composite insulator is arranged in an inverted manner, so that the lead is convenient to lead.
Furthermore, lead tension string and wire tension string are connected respectively to the both sides of even roof beam, and overhead line's top fixed mounting has the ground wire to hang the point, the overhead line both sides fixed mounting of ground wire string point lower extreme has multiunit wire to hang the point, is connected through lead tension string between wire string point and the cable terminal.
Furthermore, the output end of the cable terminal is connected with a cable, and the cable is fixedly installed on the overhead line through a cable bracket; and the lead tension string and the overhead line support are connected with a tension string hanging point.
Furthermore, the lead tension string is connected with a lightning arrester, and a lightning arrester monitor is installed on the lightning arrester.
To sum up, the utility model discloses an advantage and positive effect do:
the utility model discloses reduce the basis of two return circuit cable terminal shaft towers into 2 by 4, shaft tower basis area becomes two punctiform occupation of land of two poles by the cubic area of taking up of square column foot stall, and area reduces more than 80%, has improved the tower position selection convenience and the feasibility of the intensive region of urban area pipe network greatly. The utility model discloses the three-phase staggers completely, and the mutual noninterference of wiring is from top to bottom mutually, and the use of compound cross arm insulator has been avoided to the lead wire mode of drawing from top to bottom, both has made things convenient for construction and fortune dimension, and is succinct pleasing to the eye, safe and reliable again. And the strain insulator string inversely arranged at the lower part of the opposite pull lead adopts a composite insulator, so that the construction and installation of the lead are more convenient.
Drawings
Fig. 1 is a schematic structural diagram of a connection device for a double-loop cable line and an overhead line provided by an embodiment of the present invention;
fig. 2 is a schematic view of an overhead and cable connection structure provided by an embodiment of the present invention.
Fig. 3 is a schematic view of an overhead and cable connection structure provided by an embodiment of the present invention.
In the figure: 1. a cable termination rear pole; 2. a cable termination front bar; 3. connecting the beams; 4. a lead tension string; 5. a wire strain insulator-string; 6. a ground wire hanging point; 7. a wire hanging point; 8. a lightning arrester; 9. a lightning arrester monitor; 10. a cable; 11. a cable holder; 12. a strain insulator string hanging point; 13. a cable termination.
Detailed Description
In order to further understand the contents, features and functions of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.
The structure of the present invention will be described in detail with reference to fig. 1 to 3.
The double-loop cable line and overhead line connecting device provided by the embodiment of the utility model is provided with a cable terminal rear rod 1; the cable terminal rear rod 1 is connected with the cable terminal front rod 2 through a connecting beam 3; a platform cross arm arranged on the cable terminal rear rod 1 and the cable terminal front rod 2 is used as a main beam to lay a cable terminal platform; the cable terminal front rod 2 and the cable terminal rear rod 1 are arranged along the direction of an overhead line, the cable terminal front rod 2 is short, and the cable terminal rear rod 1 is high;
the cable terminal front rod 2, the connecting beam 3 and the cable terminal rear rod 1 are arranged with upper, middle and lower three-phase cross arms in a staggered mode, each three-phase cross arm is staggered in space, each phase can be directly connected with a corresponding phase cable terminal 13, and the vertical height difference of the three-phase cross arms meets the requirement of line spacing.
Insulator string hanging points are arranged on the upper portion of the cable terminal platform and the lower plane of the overhead cross arm, the insulator strings are tensioned and tightly connected with bare conductors in a pull-in and pull-in mode, and wire clamps at two ends of the bare conductors are respectively communicated with a cable terminal head 13 and an overhead conductor strain insulator string 5;
wherein, the counter-pulling insulator string is suitable to be inverted by adopting a composite insulator.
Lead tension string 4 and wire tension string 5 are connected respectively to the both sides of even roof beam 3, and overhead line's top fixed mounting has ground wire to hang point 6, the overhead line both sides fixed mounting of ground wire string 6 lower extreme has multiunit wire to hang point 7, is connected through lead tension string 4 between wire string 7 and the cable terminal 13. The output end of the cable terminal 13 is connected with a cable 10, and the cable 10 is fixedly installed on an overhead line through a cable bracket 11; the lead tension string 4 and the overhead line support are connected with a tension string hanging point 12. And the lead tension string 4 is connected with an arrester 8, and the arrester 8 is provided with an arrester monitor 9.
The utility model discloses well cable termination two poles are arranged in the same direction as overhead line direction, and 2 short before the cable termination, 1 high behind the cable termination pole, two poles are connected by even roof beam 3, stagger around every three-phase cross arm in the middle of getting back and setting in behind the cable termination pole 1, even roof beam 3 and cable termination pole 2, and the perpendicular difference in height of three-phase cross arm satisfies the line interval requirement. The cable terminal platform is laid by taking platform cross arms arranged on the cable terminal front rod 2 and the cable terminal rear rod 1 as main beams, and the size of the platform can be adjusted by flexibly adjusting the distance between the two rods according to the arrangement requirement of the platform. Because every time the three-phase cross arm staggers in space, every looks can with correspond looks cable terminal 13 lug connection, do not have and shelter from, in order to avoid cable terminal 13 atress, set up insulator string hanging point on cable terminal platform upper portion and built on stilts cross arm lower plane, through upper and lower insulator string tension tightening draw bare conductor, draw and connect bare conductor both ends fastener respectively with cable terminal 13 and built on stilts conductor strain insulator string 5 switch-on can, avoided the use of compound cross arm insulator, succinct pleasing to the eye, safe and reliable. In order to facilitate the installation of the lead split insulator string, the split insulator string on the cable terminal platform is suitable to be inverted by adopting a composite insulator.
A certain double-circuit 220kV cable line is laid along a highway sidewalk by adopting a shield cable tunnel, a connection point with an overhead line is positioned on a highway side steep slope, the adjacent shield starting well is narrow in tower position, an anchor rod of the shield starting well penetrates through the tower position, and the tower position cannot be erected by adopting a conventional scheme. If a wide tower position is selected, the surrounding planning land is affected, and the length of the cable line is increased by about 125 m; the conventional scheme needs to transversely install 36 composite cross arm insulators along the tower body, the tower body is complicated and messy after the composite cross arm insulators are scattered and installed, operation and maintenance tower climbing operation is influenced, and the fixing of a lead-in bare conductor at the end part of the composite cross arm insulator is easy to loosen and wear due to year-round breeze blowing, so that fault hidden danger exists. After the utility model is adopted, the number of the tower foundations is reduced from 4 to 2, so that the original tower position is established without the need of replacing the tower position; after the upper, middle and lower three-phase spaces are staggered to avoid mutual shielding, the upper, middle and lower three-phase spaces are installed in an up-down opposite-pulling mode to lead bare wires, so that a composite cross arm insulator is omitted, and the device is concise, attractive, safe, reliable, convenient to construct, operate and maintain and low in cost.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.

Claims (8)

1. A double-loop cable line and overhead line connecting device is characterized in that a cable terminal rear rod is arranged on the double-loop cable line and overhead line connecting device;
the cable terminal rear rod is connected with the cable terminal front rod through a connecting beam, and platform cross arms arranged on the cable terminal rear rod and the cable terminal front rod are used as main beams to lay a cable terminal platform;
the cable terminal front rod and the cable terminal rear rod are arranged along the direction of the overhead line.
2. The dual loop cable run to overhead line connection of claim 1, wherein the cable termination front mast height is less than the cable termination rear mast height.
3. The dual-loop cable run to overhead line connection of claim 1, wherein the cable termination front bar, the coupling beam and the cable termination rear bar are staggered with each three-phase cross-arm being spatially staggered from each other and each phase being directly connected to a corresponding phase cable termination head.
4. The apparatus for connecting a dual-circuit cable line to an overhead line of claim 1, wherein the upper portion of the cable termination platform and the lower plane of the overhead cross arm are provided with insulator string hanging points, the insulator string pairs are tensioned to tightly lead bare conductors, and the wire clamps at two ends of the lead bare conductors are respectively connected with the cable termination and the overhead conductor strain insulator string.
5. The double-circuit cable line to overhead line connection of claim 4, wherein the insulator string is installed upside down using a composite insulator.
6. The apparatus according to claim 1, wherein the connecting beam is connected to a lead tension string and a lead tension string on two sides of the connecting beam, a ground wire hanging point is fixedly installed on the top of the overhead line, a plurality of groups of lead hanging points are fixedly installed on two sides of the overhead line below the ground wire hanging point, and the lead hanging points are connected to the cable terminations through the lead tension string.
7. The dual-loop cable run to overhead line connection of claim 3, wherein a cable is connected to the output of the cable termination, the cable being fixedly mounted to the overhead line by a cable mount; and the lead tension string and the overhead line support are connected with a tension string hanging point.
8. The dual loop cable run to overhead line connection of claim 6, wherein a surge arrester is connected to said lead tension string, said surge arrester having a surge arrester monitor mounted thereon.
CN201921696044.7U 2019-10-11 2019-10-11 Connecting device for double-loop cable line and overhead line Active CN211313561U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921696044.7U CN211313561U (en) 2019-10-11 2019-10-11 Connecting device for double-loop cable line and overhead line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921696044.7U CN211313561U (en) 2019-10-11 2019-10-11 Connecting device for double-loop cable line and overhead line

Publications (1)

Publication Number Publication Date
CN211313561U true CN211313561U (en) 2020-08-21

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112049502A (en) * 2020-09-10 2020-12-08 国网福建省电力有限公司经济技术研究院 Double-loop steel pipe pole tower overhead line direct-pulling down structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112049502A (en) * 2020-09-10 2020-12-08 国网福建省电力有限公司经济技术研究院 Double-loop steel pipe pole tower overhead line direct-pulling down structure

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